Electromagnetic actuator

Abstract

The present invention relates to an electromagnetic actuator. An electromagnetic actuator having a multi-coil structure according to a preferred embodiment of the present invention includes a plurality of coils for generating a magnetic field so that a mover performs open and close operations, wherein the plurality of coils are insulated from each other. According to the present invention, the operation speed of the electromagnetic actuator can be improved without increasing the magnetic path.

Description

Electromagnetic actuator

[0001] The present invention relates to an electromagnet actuator.

[0002] The actuator of a circuit breaker is the core device that performs the mechanical operation of opening or closing the circuit. The actuator is designed in various ways. The design method of the actuator is selected based on the purpose of use and the level of voltage and current conduction and breaking capacity.

[0003] An electromagnetic actuator is a method of operating a circuit breaker using electromagnetic force. The electromagnetic actuator generates a mechanical force to open or close the circuit breaker by utilizing the magnetic force generated by the current flowing through the coil.

[0004] Conventional electromagnetic actuators use a single coil. The single coil method has the following problems: i) insufficient power transmission when the stroke is increased and the magnetic path becomes longer; ii) significant energy loss because the closing coil conditions are applied identically to the opening, even though no large force is required during opening; iii) fast response speed is important during opening, but applying the same closing coil conditions results in a larger number of coil turns, which can lead to increased coil resistance and inductance, causing a decrease in the operating current value and current delay; iv) reduced holding force during opening and closing with long strokes when the permanent magnet is used only in the lower position; and v) difficulty in transmitting energy efficiently because the coil has a single structure.

[0005] A recloser automatically detects momentary faults in power lines, cuts off power, and restores it after a set time interval. If the fault is not temporary but continuous, it provides protection by completely cutting off power after a certain number of cycles.

[0006] The operating duty of a recloser serves as the criterion for determining how many times CO (Trunk-Re-energizing) operations are performed, and it is a key factor in enhancing distribution network reliability and preventing unnecessary power outages. Generally, "3 CO + Lockout" or "4 CO + Lockout" settings are used, and the optimal setting must be adjusted according to the environment.

[0007] Making the contact close time (hereinafter, contact touch holding time) within approximately 0.5 cycles (3 to 8.3 ms at 60 Hz, 3 to 10 ms at 50 Hz) during CO operation is called pulse closure operation.

[0008] The present invention relates to a technology for incorporating a pulse closure function into an electromagnetic actuator for a recloser.

[0009] Circuit breakers are critical devices in power systems that protect electrical equipment and human lives by rapidly interrupting circuits when abnormal currents, such as overloads or short circuits, occur. Electromagnetic actuators are widely used to drive the opening and closing operations of circuit breakers.

[0010] In actuators, the open characteristics, particularly the open time, are very important from the perspective of minimizing arc generation and high-speed interruption.

[0011] The present invention aims to provide an electromagnetic actuator capable of improving operating speed without increasing the magnetic field.

[0012] In addition, the present invention aims to provide an electromagnet actuator that minimizes additional components and simplifies the control method when incorporating a pulse closure operation function into an existing electromagnet actuator.

[0013] In addition, the present invention aims to provide an electromagnetic actuator for a dual-coil type recloser with a built-in pulse closure operation function.

[0014] In addition, the present invention aims to provide an electromagnetic actuator for a single-coil type recloser with a built-in pulse closure operation function.

[0015] In addition, the present invention aims to provide an electromagnet actuator that minimizes additional components and simplifies the control method when incorporating a pulse closure operation function into an existing electromagnet actuator.

[0016] In addition, the present invention aims to provide a pulse closure operation function with excellent CO operation characteristics.

[0017] In addition, the present invention aims to provide an electromagnetic actuator with improved open characteristics.

[0018] An electromagnet actuator applying a multi-coil structure according to a preferred embodiment of the present invention for achieving the above-mentioned purpose comprises a plurality of coils that form a magnetic field to enable an actuator to perform open and close operations, and the plurality of coils are characterized by being mutually insulated.

[0019] In addition, a first space is provided between the outer surface of the actuator and the inner surface of the plunger, and an open spring is installed in the first space, and when the open operation is performed, the open operation can be accelerated by the restoring force of the open spring.

[0020] Additionally, the plurality of coils are provided in a second space formed between the outer surface of the plunger and the inner surface of the housing, and the plurality of coils can be arranged from top to bottom in the second space.

[0021] Additionally, the plurality of coils are provided in a second space formed between the outer surface of the plunger and the inner surface of the housing, and the plurality of coils can be stacked from the inner side to the outer side of the second space.

[0022] In addition, the plurality of coils can be wound in the same direction.

[0023] An electromagnet actuator for a recloser with a built-in pulse closure operation function according to a preferred embodiment of the present invention for achieving the above-mentioned purpose includes: a power supply unit that applies a close power to a coil and stops supplying the close power to the coil when a preset close power input time has elapsed; and an open spring and a pressure spring that support an open operation when the supply of the close power is cut off.

[0024] Here, the above-mentioned power-on time may be a time earlier than the time when the close operation is completed.

[0025] And, the above-mentioned power-on time may be a time earlier than the contact touch start time.

[0026] In addition, the pre-set contact touch holding time may be 1 to 8.3 ms.

[0027] In addition, the above-mentioned opening operation may be carried out by the elastic force of the opening spring and the pressure spring accumulated during the closing operation by the above-mentioned closing power source.

[0028] An electromagnet actuator for a dual-coil type recloser with a built-in pulse closure operation function according to a reverse current injection method according to a preferred embodiment of the present invention comprises a close coil; an open coil; and a power supply unit that supplies a close power to the close coil during a close operation and supplies an open power to the open coil during an open operation.

[0029] Here, the power supply unit is characterized by supplying open power to the open coil in any one of the following ways: i) applying open power before the completion of the close operation; ii) applying open power around the time of completion of the close operation or at the time of completion of the close operation; and iii) applying open power after the completion of the close operation.

[0030] And, the above power supply unit is characterized by supplying a close power to the close coil in one of the following ways: i) a method in which the close power is supplied until the close operation is completed; ii) a method in which the supply of the close power is stopped before the close operation is completed.

[0031] In addition, the power supply unit is characterized by controlling the timing of supplying closed power to the closed coil, the time for maintaining the supply of closed power to the closed coil, the timing for stopping the supply of closed power to the closed coil, the timing of supplying open power to the open coil, the time for maintaining the supply of open power to the open coil, and the timing for stopping the supply of open power to the open coil, thereby securing a preset contact touch holding time.

[0032] In addition, the power supply unit is characterized by including a first power supply unit that supplies closed power to the closed coil; and a second power supply unit that supplies open power to the open coil.

[0033] In addition, the closed coil and the open coil are characterized by sharing a single power source.

[0034] Additionally, the closed coil is wound in a first direction while moving from a first side to a second side, the first side of the closed coil is electrically connected to a first pole of a power supply unit, the second side of the closed coil is electrically connected to a second pole of a power supply unit, and a first switch controls the power supply unit to supply closed power to the closed coil according to a preset first timing, and the open coil is wound in a second direction while moving from a first side to a second side, the second direction is the opposite direction of the first direction, the first side of the open coil is electrically connected to a first pole of a power supply unit, the second side of the open coil is electrically connected to a second pole of a power supply unit, and a second switch controls the power supply unit to supply open power to the open coil according to a preset second timing.

[0035] Additionally, the closed coil is wound in a first direction while moving from a first side to a second side, the first side of the closed coil is electrically connected to a first pole of a power supply unit, the second side of the closed coil is electrically connected to a second pole of a power supply unit, and a first switch controls the power supply unit to supply closed power to the closed coil according to a preset first timing, and the open coil is wound in a first direction while moving from a first side to a second side, the first side of the open coil is electrically connected to a second pole of a power supply unit, the second side of the open coil is electrically connected to a first pole of a power supply unit, and a second switch controls the power supply unit to supply open power to the open coil according to a preset second timing.

[0036] In addition, the closed coil and the open coil are electrically insulated.

[0037] In addition, the closing operation by the above-mentioned close coil and the opening operation by the above-mentioned open coil are characterized by being continuous.

[0038] In addition, it is characterized by securing a preset contact touch holding time in the transition period from the closed operation to the open operation through the control of the closed power and the open power.

[0039] An electromagnet actuator for a single-coil type recloser with a built-in pulse closure operation function according to a reverse current injection method according to a preferred embodiment of the present invention includes: a coil that generates a magnetic field for performing close and open operations by receiving power; and a power supply unit that supplies close power and open power to the coil.

[0040] Here, the power supply unit is characterized by controlling the supply timing of the close power and open power so that a preset contact touch holding time is secured during the performance of the CO (Close-Open) duty.

[0041] And, the above power supply unit is characterized by including a first power supply unit that supplies closed power; and a second power supply unit that supplies open power.

[0042] In addition, the first power supply and the second power supply are characterized by being connected in parallel to the coil.

[0043] In addition, the power supply unit is characterized by supplying open power in any one of the following ways: i) applying open power before the completion of the close operation; ii) applying open power around the time of completion of the close operation or at the time of completion of the close operation; and iii) applying open power after the completion of the close operation.

[0044] In addition, the power supply unit is characterized by supplying open power in either i) a method in which the closed power is supplied until the completion of the closed operation, or ii) a method in which the supply of the closed power is stopped before the completion of the closed operation.

[0045] In addition, the device includes an open spring and a pressure spring that are compressed and accumulate elastic force when the aforementioned closure power is supplied, and the open spring and the pressure spring support an opening operation with the accumulated elastic force.

[0046] In addition, the power supply unit is characterized by supplying open power at a point in time after the supply of closed power is interrupted, specifically before the completion of the closed operation.

[0047] In addition, the closing and opening operations by the above coil are characterized by being continuous.

[0048] In addition, it is characterized by securing a preset contact touch holding time in the transition period from the closed operation to the open operation through the control of the closed power and the open power.

[0049] An electromagnet actuator for a recloser according to a preferred embodiment of the present invention includes: a power supply unit that applies a close power supply to a coil and stops supplying the close power supply to the coil when a preset close power supply time has elapsed; and an open spring and a pressure spring that support an open operation when the supply of the close power supply is cut off.

[0050] Here, the above-mentioned power-on time may be a time earlier than the time when the close operation is completed.

[0051] And, the above-mentioned power-on time may be a time earlier than the contact touch start time.

[0052] In addition, the pre-set contact touch holding time may be 1 to 8.3 ms.

[0053] In addition, the above-mentioned opening operation may be carried out by the elastic force of the opening spring and the pressure spring accumulated during the closing operation by the above-mentioned closing power source.

[0054] In addition, before the pulse closure operation begins, the blocking part may perform a blocking operation to prevent the plunger from reaching the close completion position.

[0055] In addition, the blocking part performs a blocking operation that restricts the movement of the actuator between the lower plate and the upper cap, and the blocking part can perform the blocking operation by positioning the first blocking plate in the movement path of the first arm placed on the side of the actuator before the first actuator starts the pulse closure operation according to the current interruption method.

[0056] In addition, so that the first arm does not collide with the lower plate or the upper cap during the operation of the operator's close and open movements, the first arm is installed so as to be spaced apart from the lower plate at the bottom of the lower plate when the close movement is completed, and the first arm can be spaced apart from the upper cap at the top of the upper cap when the open movement is completed.

[0057] Additionally, the blocking part performs a blocking operation that restricts the movement of the actuator (320) at the bottom of the lower cap (312), and the blocking part can perform the blocking operation by positioning the second blocking plate in the movement path of the second arm placed on the side of the actuator before the second actuator starts the pulse closure operation according to the current interruption method.

[0058] An electromagnet actuator including a separable actuator structure according to a preferred embodiment of the present invention comprises an upper actuator (410) including a first main body (411) and a first protrusion (412); and a lower actuator (420) including a second main body (421) and a second protrusion (422).

[0059] Here, an opening spring (600) that supports the opening operation of the actuator with the elastic force accumulated during the closing operation of the actuator is further included, and the opening spring (600) may be located on the outside of the second main body (421).

[0060] Additionally, the device further includes a separation spring (700) that supports the separation operation of the upper movable member (410) and the lower movable member (420) with the elastic force accumulated during the closing operation of the actuator, wherein the separation spring (700) is installed inside the second protrusion (422) and extends from the top to the bottom, the upper part of the separation spring (700) is in close contact with the lower surface of the first main body (411), and the lower part of the separation spring (700) can be in close contact with the upper surface of the second main body (421).

[0061] Additionally, the electromagnet actuator further includes a lower cap (520) that accommodates the second body (421), and a stopper (521) may be provided in at least a portion of the lower cap (520) facing the second body (421).

[0062] The present invention can improve the operating speed of an electromagnetic actuator without increasing the magnetic field.

[0063] In addition, the present invention performs an opening operation solely through the elastic force of the opening spring and the pressure spring without the need for a separate opening power supply during CO operation. Therefore, the configuration for performing the pulse closure operation function can be very simple. As a result, when incorporating the pulse closure operation function into an electromagnet actuator, the number of additional components required is minimized and the control method can be simplified.

[0064] In addition, the present invention can enable an electromagnet actuator to have a pulse closure function by controlling the timing of the closed power supply and the open power supply.

[0065] In addition, the present invention performs an opening operation solely through the elastic force of the opening spring and the pressure spring without the need for a separate opening power supply during CO operation. Therefore, the configuration for performing the pulse closure operation function can be very simple. As a result, when incorporating the pulse closure operation function into an electromagnet actuator, the number of additional components required is minimized and the control method can be simplified.

[0066] Furthermore, the present invention can effectively control the contact touch holding time by performing blocking during the closing operation in the CO operation. That is, by performing blocking during the closing operation in the CO operation, the present invention secures the desired contact touch holding time while simultaneously facilitating easy transition from the closed state to the open state.

[0067] In addition, the present invention can reduce the open time through a separable actuator structure.

[0068] Figure 1 is a structural diagram of a single-coil type electromagnetic actuator.

[0069] Figure 2 is a structural diagram of a horizontal type multi-coil electromagnet actuator.

[0070] Figure 3 is a structural diagram of a vertical type multi-coil electromagnet actuator.

[0071] Figure 4 is a diagram illustrating the operating characteristics of a single-coil type electromagnet actuator.

[0072] Figure 5 is the result of finite element analysis for the open operation of a single-coil type electromagnet manipulator.

[0073] Figure 6 is the result of a finite element analysis of the closing operation of a single-coil type electromagnet actuator.

[0074] Figure 7 is a diagram illustrating the operating characteristics of a horizontal type multi-coil electromagnet actuator.

[0075] Figure 8 is the result of finite element analysis for the open operation of a horizontal type multi-coil electromagnet manipulator.

[0076] Figure 9 shows the finite element analysis results for the closing operation of a horizontal type multi-coil electromagnet manipulator.

[0077] Figure 10 is a diagram illustrating the operating characteristics of a vertical type multi-coil electromagnet actuator.

[0078] Figure 11 shows the finite element analysis results for the open operation of a vertical type multi-coil electromagnet manipulator.

[0079] Figure 12 is the result of a finite element analysis of the closing operation of a vertical type multi-coil electromagnet manipulator.

[0080] FIG. 13 is a diagram illustrating the operating characteristics of a horizontal type multi-coil electromagnet actuator according to another embodiment.

[0081] Figure 14 is the result of finite element analysis for the open operation of the multi-coil electromagnet manipulator of Figure 13.

[0082] Figure 15 is the result of a finite element analysis of the closing operation of the multi-coil electromagnet manipulator of Figure 13.

[0083] FIG. 16 is a diagram illustrating the operating characteristics of a vertical type multi-coil electromagnet manipulator according to another embodiment.

[0084] Figure 17 is the result of finite element analysis for the open operation of the multi-coil electromagnet manipulator of Figure 16.

[0085] Figure 18 is the result of a finite element analysis of the closing operation of the multi-coil electromagnet manipulator of Figure 16.

[0086] FIG. 19 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to one embodiment of the present invention.

[0087] FIG. 20 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 19.

[0088] FIG. 21 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 19.

[0089] FIG. 22 is a diagram illustrating the first step of pulse closure operation according to the current interruption method.

[0090] FIG. 23 is a diagram illustrating the second stage of pulse closure operation according to the current interruption method.

[0091] FIG. 24 is a diagram illustrating the third step of pulse closure operation according to the current interruption method.

[0092] FIG. 25 is a diagram illustrating the fourth step of pulse closure operation according to the current interruption method.

[0093] FIG. 26 is a diagram illustrating the fifth step of pulse closure operation according to the current interruption method.

[0094] FIGS. 27 to 28 show the analysis of the magnetic field at the first to fifth time points in the pulse closure operation according to the current interruption method.

[0095] FIG. 29 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to one embodiment of the present invention.

[0096] FIG. 30 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 29.

[0097] FIG. 31 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 29.

[0098] FIG. 32 is a diagram illustrating the first step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0099] FIG. 33 is a diagram illustrating the second stage of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0100] FIG. 34 is a diagram illustrating the third step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0101] FIG. 35 is a diagram illustrating the fourth step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0102] FIG. 36 is a diagram illustrating the fifth step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0103] FIGS. 37 and 38 are drawings illustrating the results of analyzing the magnetic field at the first to fifth time points in the pulse closure operation of an electromagnet manipulator.

[0104] FIG. 39 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to another embodiment of the present invention.

[0105] FIG. 40 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to one embodiment of the present invention.

[0106] FIG. 41 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 40.

[0107] FIG. 42 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 40.

[0108] FIG. 43 is a diagram illustrating the first step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0109] FIG. 44 is a diagram illustrating the second stage of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0110] FIG. 45 is a diagram illustrating the third step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0111] FIG. 46 is a diagram illustrating the fourth step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0112] FIG. 47 is a diagram illustrating the fifth step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0113] FIGS. 48 and 49 are drawings illustrating the results of finite element analysis of the magnetic field at the first to fifth time points in the pulse closure operation of an electromagnet manipulator.

[0114] FIG. 50 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to one embodiment of the present invention.

[0115] FIG. 51 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 50.

[0116] FIG. 52 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 50.

[0117] FIG. 53 is a diagram illustrating the first step of pulse closure operation according to the current interruption method.

[0118] FIG. 54 is a diagram illustrating the second stage of pulse closure operation according to the current interruption method.

[0119] FIG. 55 is a diagram illustrating the third step of pulse closure operation according to the current interruption method.

[0120] FIG. 56 is a diagram illustrating the fourth step of pulse closure operation according to the current interruption method.

[0121] FIG. 57 is a diagram illustrating the fifth step of pulse closure operation according to the current interruption method.

[0122] FIGS. 58 to 59 show the analysis of the magnetic field at the first to fifth time points in the pulse closure operation according to the current interruption method.

[0123] FIG. 60 is a structural diagram of an electromagnetic actuator for a recloser according to another embodiment of the present invention.

[0124] FIG. 61 is a cross-sectional view of an electromagnet actuator according to the prior art.

[0125] FIG. 62 is a cross-sectional view of an electromagnetic actuator according to one embodiment of the present invention.

[0126] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0127] In describing the present invention, if it is determined that a detailed description of related known technology may obscure the essence of the present invention, such detailed description is omitted.

[0128] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0129] For example, without departing from the scope of the rights of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0130] The term "and / or" includes a combination of multiple related listed items or any of the multiple related listed items.

[0131] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention.

[0132] The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0133] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains.

[0134] Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0135] The following description and drawings include various embodiments. In drawings describing different embodiments, the fact that reference numerals are identical does not imply that the function and operation of the components indicated by those reference numerals are identical. That is, components indicated by the same reference numeral have independent functions and operations within the category of the embodiments to be described by those drawings.

[0136]

[0137] Hereinafter, an electromagnetic actuator applying the multi-coil structure of the present invention will be described with reference to FIGS. 1 to 18.

[0138]

[0139] First, a single-coil type electromagnet actuator will be explained.

[0140] Figure 1 is a structural diagram of a single-coil type electromagnetic actuator.

[0141] The electromagnet actuator may include a housing (100), a actuator (200), a plunger (300), an open spring (400), a coil (500), and permanent magnets (610, 620). The housing (100) may be a hollow cylindrical shape. The upper part of the housing (100) may be capped by an upper cap (110). The upper cap (110) may include an upper opening (111) formed through the upper and lower parts. The upper opening (111) may be provided in the central area of ​​the upper part of the housing (100). The lower part of the housing (100) may be capped by a lower cap (120). The lower cap (120) may include a lower opening (121) formed through the upper and lower parts. The lower opening (121) may be provided in the central area of ​​the lower part of the housing (100). Additionally, the movable member (200) may be installed by penetrating the housing (100) vertically. The movable member (200) may be in the shape of a long rod. The upper side of the movable member (200) may penetrate the upper opening (111) and extend to the upper part of the upper opening (111). The lower side of the movable member (200) may penetrate the lower opening (121) and extend to the lower part of the lower opening (121). The lower side of the movable member (200) may include a support member (210) that extends to the side. A plunger (300) may be provided on the side of the movable member (200). The plunger (300) may be hollow and cylindrical with the upper and lower ends open. The plunger (300) may accommodate the movable member (200) at its inner center. The lower part of the plunger (300) can be supported by the support part (210) of the movable member. A first space (S) can be provided between the outer surface of the movable member (200) and the inner surface of the plunger (300). And, an open spring (400) can be installed in the first space (S). The upper part of the open spring (400) can be in close contact with the upper cap (110), and the lower part of the open spring (400) can be in close contact with the upper part of the support part (210) of the movable member. The open spring (400) can accommodate the movable member (200) inside.The open spring (400) can contract and expand according to the up and down movement of the actuator (200). The open spring (400) may be a cylindrical spring. A second space (A) may be formed between the outer surface of the plunger (300) and the inner surface of the housing (100). A coil (500) may be provided in the second space (A). The coil (500) is wound in one direction and may extend from the upper to the lower part of the second space (A).

[0142] The upper permanent magnet (610) may be located near the top of the coil (500). The magnetic field formed by the upper permanent magnet (610) can fix the movable member (200) in the closing position.

[0143] The lower permanent magnet (620) may be located near the bottom of the coil (500). The magnetic field formed by the lower permanent magnet (620) can fix the movable member (200) in an open position.

[0144] The open operation in the above structure is explained.

[0145] First, an operating power supply (not shown) can apply voltage to the coil (500). Current flows through the coil (500) due to the voltage, and a magnetic field can be formed around the coil (500) due to the current. This magnetic field can cause the movable member (200) to move in the open direction, free from the restraint of the upper permanent magnet (610). At this time, the movable member (200) can move more quickly to the open position due to the restoring force of the open spring (400) acting in the open direction. When the open operation is completed, the movable member (200) can be fixed in the open position by the lower permanent magnet (620). If the movable member (200) is moved slightly by the magnetic field formed in the coil (500) at the beginning of the open operation, the movable member (200) can then move quickly to the open position due to the restoring force of the open spring (400). Therefore, it is important to form a strong magnetic field by flowing a large current through the coil (500) at the beginning of the open operation in terms of the circuit breaker operation characteristics.

[0146] The closing operation in the above structure is explained.

[0147] First, an operating power supply (not shown) can apply voltage to the coil (500). The voltage applied to the coil (500) during closing may be in the reverse direction of the voltage applied to the coil (500) during opening. At this time, a magnetic field may be formed around the coil (500) by the current flowing through the coil (500). The magnetic field may cause the actuator (200) to move in the closing direction, freeing it from the restraining force of the lower permanent magnet (620). At this time, the actuator (200) may move to the closing position while overcoming the repulsive force of the open spring (400). When the closing operation is completed, the actuator (200) may be fixed in the closing position by the upper permanent magnet (610). In order to overcome the repulsive force of the open spring (400) during the closing operation, it is necessary to supply sufficient voltage to the coil (500) during the closing operation.

[0148] In a structure like the one above, to ensure a fast opening time—or to put it another way—a larger amount of coil is required to increase the strength of the magnetic field acting during opening. Additionally, a larger space is needed for coil installation.

[0149]

[0150] Next, the multi-coil type electromagnetic actuator will be described. Multi-coil type electromagnetic actuators can be classified into horizontal and vertical types. Below, explanations regarding details that overlap with the single-coil type will be omitted or simplified. In the multi-coil type, components identical to those in the single-coil type are assigned the same reference numerals.

[0151]

[0152] First, I will explain the horizontal type.

[0153] Figure 2 is a structural diagram of a horizontal type multi-coil electromagnet actuator.

[0154] A horizontal type multi-coil electromagnet actuator may include a plurality of coils (500a-1, 500a-2, 500a-3) arranged between the upper and lower portions of the second space (A). FIG. 2 illustrates a case where three coils are applied to the horizontal type, but if two or more coils are arranged between the upper and lower portions of the second space (A), it may be classified as a horizontal type multi-coil electromagnet actuator of the present invention.

[0155] Multiple coils (500a-1, 500a-2, 500a-3) may be mutually insulated by an insulating material (e.g., solid insulating material (Epoxy, MC, PC, PE, and various insulating papers, etc.)). Multiple coils may be wound in the same direction. The radius and length of the multiple coils (500a-1, 500a-2, 500a-3) may be the same or different. The number of turns of the multiple coils (500a-1, 500a-2, 500a-3) may be the same or different. However, for the simplification of the production process and ease of control, it is preferable that the number of turns, radius, and length of the multiple coils (500a-1, 500a-2, 500a-3) be the same. However, there may be slight differences in the number of turns, radius, and length of the multiple coils due to errors in the production process. That is, the number of turns, radius, and length of the multiple coils (500a-1, 500a-2, 500a-3) are preferably within the allowable tolerance range of the pre-set specifications.

[0156] Each of the multiple coils (500a-1, 500a-2, 500a-3) can be wound while extending from the top to the bottom.

[0157]

[0158] Next, we will explain the vertical type.

[0159] Figure 3 is a structural diagram of a vertical type multi-coil electromagnet actuator.

[0160] A vertical type multi-coil electromagnet actuator may include a plurality of coils (500b-1, 500b-2, 500b-3) stacked from the inner side to the outer side of the second space (A). FIG. 3 illustrates a case where there are three coils applied to the vertical type, but if two or more coils are arranged between the inner side and the outer side of the second space (A), it may be classified as a vertical type multi-coil electromagnet actuator of the present invention.

[0161] Multiple coils (500b-1, 500b-2, 500b-3) may be mutually insulated by an insulating material (e.g., solid insulating material (Epoxy, MC, PC, PE, and various insulating papers, etc.)). Multiple coils may be wound in the same direction. The lengths of the multiple coils (500b-1, 500b-2, 500b-3) may be the same or different. The number of turns of the multiple coils (500b-1, 500b-2, 500b-3) may be the same or different. Each of the multiple coils (500b-1, 500b-2, 500b-3) may be wound while extending from the top to the bottom.

[0162]

[0163] The operating characteristics and detailed structure of the electromagnetic actuator described above will be explained below.

[0164]

[0165] Figure 4 is a diagram illustrating the operating characteristics of a single-coil type electromagnet actuator.

[0166] Referring to FIG. 4, when the open state is completed, the actuator (200) can be fixed in the open position by the lower permanent magnet (620). Also, the open spring (400) may be in a state where it has completed expansion. The operating power supply (710) used for the open operation may be a capacitor (C). Before the open operation begins, the capacitor (C) is charged, and when the open operation begins, the charging voltage of the capacitor (C) can be supplied to the coil (500). In FIG. 4, reference numeral 500 indicates the equivalent circuit of the coil. As shown in FIG. 4, the coil may be represented by a resistor (R) and an inductance (L) connected in series. A switch (not shown) capable of interrupting the capacitor (C) from supplying voltage to the coil (500) may be provided. When the close state is completed, the actuator (200) can be fixed in the closed position by the upper permanent magnet (610). Additionally, the open spring (400) may be in a contracted state. The operating power supply (720) used for the close operation may be a capacitor (C). The capacitor (C) is charged before the close operation begins, and the capacitor (C) charging voltage may be supplied to the coil (500) at the start of the close operation. Additionally, a switch (not shown) capable of interrupting the capacitor (C) used for the close operation from supplying voltage to the coil (500) may be provided. The operating power supply for both the open and close operations may be implemented by the same capacitor.

[0167]

[0168] Figure 5 is the result of a finite element analysis of the open operation of a single-coil type electromagnet actuator. Figure 5 is the result of a simulation using the electromagnet actuator of Figure 4.

[0169] During the open operation, the capacitor (C) was prevented from discharging to the coil (500) at 30 ms (millisecond). Then, it can be confirmed that the open operation was completed at 94 ms by the open spring (400).

[0170]

[0171] Figure 6 is the result of a finite element analysis of the closing operation of a single-coil type electromagnet actuator. Figure 6 is the result of a simulation using the electromagnet actuator of Figure 4.

[0172] It can be confirmed that the closing operation is completed at 71.5 ms. During the closing operation, the current flowing through the coil (500) reaches a maximum value at 24 ms, and the capacitor (C) charging voltage is continuously supplied until the closing operation is completed.

[0173]

[0174] FIG. 7 is a diagram illustrating the operational characteristics of a horizontal type multi-coil electromagnet actuator. Below, descriptions that overlap with those of a single-coil type electromagnet actuator will be omitted or simplified. The electromagnet actuator of FIG. 7 differs from the electromagnet actuator of FIG. 4 in the structure of the coil, but the configuration other than the coil is the same.

[0175] As described in FIG. 2, a horizontal type multi-coil electromagnet actuator may include a plurality of coils (500a-1, 500a-2, 500a-3) arranged between the upper and lower portions of the second space (A). FIG. 7 illustrates a case where there are three coils applied to the horizontal type. The plurality of coils (500a-1, 500a-2, 500a-3) may be electrically insulated from one another. However, only the ends of the plurality of coils (500a-1, 500a-2, 500a-3) may be electrically connected to one another, so that the plurality of coils (500a-1, 500a-2, 500a-3) may be electrically connected in parallel.

[0176] Multiple coils (500a-1, 500a-2, 500a-3) can be represented as an equivalent circuit of multiple coils connected in parallel. That is, each of the multiple coils (500a-1, 500a-2, 500a-3) can be represented as an equivalent circuit of a coil consisting of resistance (R) and inductance (L). Through the equivalent circuit, it can be clearly seen that the equivalent resistance value of the multiple coils (500a-1, 500a-2, 500a-3) is reduced compared to the single coil type. Accordingly, the current value and magnetic field supplied to the multiple coils (500a-1, 500a-2, 500a-3) become greater compared to the single coil type. Accordingly, the opening speed of the horizontal type multi-coil electromagnet actuator can be greater than that of the single coil type.

[0177] Additionally, all of the multiple coils (500a-1, 500a-2, 500a-3) can be connected to a single operating power supply (710a). The operating power supply (710a) may be a capacitor (C). Before the start of the open operation, the capacitor (C) is charged, and at the start of the open operation, the charging voltage of the capacitor (C) can be simultaneously applied to the multiple coils (500a-1, 500a-2, 500a-3). Before the start of the close operation, the capacitor (C) is charged, and at the start of the close operation, the charging voltage of the capacitor (C) can be simultaneously applied to the multiple coils (500a-1, 500a-2, 500a-3).

[0178] A switch (not shown) capable of interrupting the supply of voltage to a plurality of coils (500a-1, 500a-2, 500a-3) by a capacitor (C) used for open or closed operation may be provided. The operating power supply for open and closed operation may be implemented by the same capacitor.

[0179]

[0180] Figure 8 is the result of a finite element analysis of the open operation of a horizontal type multi-coil electromagnet actuator. Figure 8 is the result of a simulation using the electromagnet actuator of Figure 7.

[0181] During the open operation, the capacitor (C) was prevented from discharging to the multiple coils (500a-1, 500a-2, 500a-3) at 10 ms (millisecond). Then, it can be confirmed that the open operation was completed at 86 ms by the open spring (400).

[0182]

[0183] Figure 9 shows the finite element analysis results for the closing operation of a horizontal type multi-coil electromagnet actuator. Figure 9 shows the simulation results using the electromagnet actuator of Figure 7.

[0184] You can see that the close operation is completed at 43 ms.

[0185]

[0186] FIG. 10 is a diagram illustrating the operational characteristics of a vertical type multi-coil electromagnet actuator. Below, descriptions that overlap with those of a single-coil type electromagnet actuator will be omitted or simplified. The electromagnet actuator of FIG. 10 differs from the electromagnet actuator of FIG. 4 in the structure of the coil, but the configuration other than the coil is the same.

[0187] As described in FIG. 3, a vertical type multi-coil electromagnet actuator may include a plurality of coils (500b-1, 500b-2, 500b-3) stacked from the inner side to the outer side of the second space (A). FIG. 10 illustrates a case where there are three coils applied to the vertical type. The plurality of coils (500b-1, 500b-2, 500b-3) may be electrically insulated from one another. However, only the ends of the plurality of coils (500b-1, 500b-2, 500b-3) may be electrically connected to one another, so that the plurality of coils (500b-1, 500b-2, 500b-3) may be electrically connected in parallel.

[0188] Multiple coils (500b-1, 500b-2, 500b-3) can be represented as an equivalent circuit of multiple coils connected in parallel. That is, each of the multiple coils (500b-1, 500b-2, 500b-3) can be represented as an equivalent circuit of a coil consisting of resistance (R) and inductance (L). Through the equivalent circuit, it can be clearly seen that the equivalent resistance value of the multiple coils (500b-1, 500b-2, 500b-3) is reduced compared to the single coil type. Accordingly, the current value and magnetic field supplied to the multiple coils (500b-1, 500b-2, 500b-3) become greater compared to the single coil type. Accordingly, the opening speed of the vertical type multi-coil electromagnet actuator can be greater than that of the single coil type.

[0189] Also, all of the multiple coils (500b-1, 500b-2, 500b-3) can be connected to a single operating power supply (710b). The operating power supply (710b) may be a capacitor (C). Before the start of the open operation, the capacitor (C) is charged, and at the start of the open operation, the charging voltage of the capacitor (C) can be applied simultaneously to the multiple coils (500b-1, 500b-2, 500b-3). Before the start of the close operation, the capacitor (C) is charged, and at the start of the close operation, the charging voltage of the capacitor (C) can be applied simultaneously to the multiple coils (500b-1, 500b-2, 500b-3).

[0190] A switch (not shown) capable of interrupting the supply of voltage to a plurality of coils (500b-1, 500b-2, 500b-3) by a capacitor (C) used for open or closed operation may be provided. The operating power supply for open and closed operation may be implemented by the same capacitor.

[0191]

[0192] Figure 11 is the result of a finite element analysis of the open operation of a vertical type multi-coil electromagnet actuator. Figure 11 is the result of a simulation using the electromagnet actuator of Figure 10.

[0193] During the open operation, the capacitor (C) was prevented from discharging to the multiple coils (500b-1, 500b-2, 500b-3) at 10 ms. And, it can be confirmed that the open operation was completed at 84 ms by the open spring (400).

[0194]

[0195] Figure 12 is the result of a finite element analysis of the closing operation of a vertical type multi-coil electromagnet actuator. Figure 12 is the result of a simulation using the electromagnet actuator of Figure 10.

[0196] You can see that the close operation is completed at 41 ms.

[0197]

[0198] FIG. 13 is a diagram illustrating the operating characteristics of a horizontal type multi-coil electromagnet actuator according to another embodiment. In the following, descriptions that overlap with those of a single-coil type electromagnet actuator and the electromagnet actuator of FIG. 7 will be omitted or simplified. The electromagnet actuator of FIG. 13 differs from the electromagnet actuator of FIG. 7 in its coil and operating power supply, but the other configurations are identical.

[0199] Referring to FIG. 13, a horizontal type multi-coil electromagnet actuator may include a plurality of coils (500a-11, 500a-22, 500a-32) arranged between the upper and lower portions of a second space (A). FIG. 13 illustrates a case where three coils are applied to the horizontal type. The plurality of coils (500a-11, 500a-22, 500a-33) may be completely electrically insulated from one another. Additionally, each of the plurality of coils (500a-11, 500a-22, 500a-33) may be connected to an operating power supply unit (710a-1, 710a-2, 710a-3) responsible for each of the plurality of coils (500a-11, 500a-22, 500a-33). FIG. 13 illustrates an electrical equivalent circuit for such a structure. In this structure, when the charging voltage of the plurality of operating power supplies (710a-1, 710a-2, 710a-3) is the same as the charging voltage in FIG. 7, the resistance value of each of the plurality of coils (500a-11, 500a-22, 500a-33) connected to each of the plurality of operating power supplies (710a-1, 710a-2, 710a-3) may be small. Accordingly, the sum of the magnetic fields of the plurality of coils (500a-11, 500a-22, 500a-33) generated by the charging voltage of the plurality of operating power supplies (710a-1, 710a-2, 710a-3) may be greater than the magnetic field formed by the single coil in FIG. 4. The plurality of operating power supplies (710a-1, 710a-2, 710a-3) may be capacitors (C). The capacitor capacitance and charging voltage of the multiple operating power supply units (710a-1, 710a-2, 710a-3) may be the same.

[0200] A switch (not shown) capable of interrupting the supply of voltage to a plurality of coils (500a-11, 500a-22, 500a-33) by a capacitor (C) used for open or close operation may be provided. The operating power supply for open and close operation may be implemented by the same capacitor. A plurality of capacitors (C) used for open or close operation may supply and cut off voltage to each of the plurality of coils at the same time.

[0201]

[0202] Figure 14 is the result of finite element analysis for the open operation of the multi-coil electromagnet manipulator of Figure 13.

[0203] During the open operation, all capacitors (C) were prevented from discharging to multiple coils (500a-11, 500a-22, 500a-33) at 10 ms (millisecond). And, it can be confirmed that the open operation was completed at 83.99 ms by the open spring (400).

[0204]

[0205] Figure 15 is the result of a finite element analysis of the closing operation of the multi-coil electromagnet manipulator of Figure 13.

[0206] You can see that the close operation was completed at 41.5 ms.

[0207]

[0208] FIG. 16 is a diagram illustrating the operating characteristics of a vertical type multi-coil electromagnet actuator according to another embodiment. In the following, descriptions that overlap with those of a single-coil type electromagnet actuator and the electromagnet actuator of FIG. 10 will be omitted or simplified. The electromagnet actuator of FIG. 16 differs from the electromagnet actuator of FIG. 10 in its coil and operating power supply, but the other configurations are identical.

[0209] Referring to FIG. 16, a vertical type multi-coil electromagnet actuator may include a plurality of coils (500b-11, 500b-22, 500b-33) stacked from the inner to the outer direction of a second space (A). FIG. 16 illustrates a case where three coils are applied to the vertical type. The plurality of coils (500b-11, 500b-22, 500b-33) may be completely electrically insulated from one another. Additionally, each of the plurality of coils (500b-11, 500b-22, 500b-33) may be connected to an operating power supply unit (710b-1, 710b-2, 710b-3) responsible for each of the plurality of coils (500b-11, 500b-22, 500b-33). FIG. 16 shows an electrical equivalent circuit for such a structure. In this structure, when the charging voltage of the plurality of operating power supplies (710b-1, 710b-2, 710b-3) is the same as the charging voltage in FIG. 10, the resistance value of each of the plurality of coils (500b-11, 500b-22, 500b-33) connected to each of the plurality of operating power supplies (710b-1, 710b-2, 710b-3) may be small. Accordingly, the sum of the magnetic fields of the plurality of coils (500b-11, 500b-22, 500b-33) generated by the charging voltage of the plurality of operating power supplies (710b-1, 710b-2, 710b-3) may be greater than the magnetic field formed by the single coil in FIG. 4. The plurality of operating power supplies (710b-1, 710b-2, 710b-3) may be capacitors (C). The capacitor capacitance and charging voltage of the multiple operating power supply units (710b-1, 710b-2, 710b-3) may be the same.

[0210] A switch (not shown) capable of interrupting the supply of voltage to a plurality of coils (500b-11, 500b-22, 500b-33) by a capacitor (C) used for open or close operation may be provided. The operating power supply for open and close operation may be implemented by the same capacitor. A plurality of capacitors (C) used for open or close operation may supply and cut off voltage to each of the plurality of coils at the same time.

[0211]

[0212] Figure 17 is the result of finite element analysis for the open operation of the multi-coil electromagnet manipulator of Figure 16.

[0213] During the open operation, all capacitors (C) were prevented from discharging to multiple coils (500b-11, 500b-22, 500b-33) in 10 ms (millisecond). Then, it can be confirmed that the open operation was completed in 86 ms by the open spring (400).

[0214]

[0215] Figure 18 is the result of a finite element analysis of the closing operation of the multi-coil electromagnet manipulator of Figure 16.

[0216] You can confirm that the close operation is completed in 40 ms.

[0217]

[0218] The results of the above simulation are summarized in the table below.

[0219]

[0220] Coil Split Winding Direction Source Circuit Open Time (m / s) Close Time (m / s) Close Speed ​​(m / s) 1-19 47 1.5 2.0 83 Horizontal 1 (1 circuit) Parallel 86 43 3.4 73 Vertical 1 (1 circuit) Parallel 84 41 3.6 33 Horizontal 3 (multiple circuits) 83.9 9 41.5 3.5 93 Vertical 3 (multiple circuits) 86 40 3.7 3

[0221]

[0222] The opening speed is determined by the opening spring; if a current sufficient to offset the initial holding force is applied and then cut off, the opening occurs solely due to the force of the opening spring. By temporarily increasing the current in the coil to accelerate the magnetic cancellation speed, the start time for the plunger to move is shortened, thereby increasing the overall opening speed. Simulation results confirmed that the opening speed can be accelerated in all horizontal and vertical type multi-coil electromagnet actuators.

[0223] Also, since current is supplied until the closing speed is completed, if a strong current is flowed through a continuous power supply using a multi-coil (Low Resistance), the closing speed becomes faster.

[0224] Vertical winding is easier for winding coils than horizontal winding. Of course, either horizontal or vertical types can be selected depending on the manufacturing situation.

[0225] In identical multi-coil systems, a single circuit (parallel) controller that sums the coil currents places a heavy burden on the driver during switching operations due to the current; therefore, distributing the current to a separate controller for each coil can be advantageous in terms of control and cost. For reference, high-current switching devices are expensive.

[0226]

[0227] Hereinafter, an electromagnetic actuator with a multi-coil structure will be described with reference to the attached FIGS. 19 to 28.

[0228]

[0229] Hereinafter, with reference to FIG. 19, an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to the present invention will be described.

[0230] FIG. 19 is a structural diagram of an electromagnetic actuator for a recloser (hereinafter referred to as 'electromagnetic actuator') with a built-in pulse closure operation function according to one embodiment of the present invention.

[0231] The blocking unit (100) can perform open and close operations by means of an electromagnet actuator. The blocking unit (100) may include a fixed rod (110) and a movable rod (120). A fixed contact (111) may be provided at one end of the fixed rod (110). And, a movable contact (121) may be opposite to the fixed contact (111). A movable contact (121) may be provided at one end of the movable rod (120). A pressure transmission plate (122) may be provided at the other end of the movable rod (120). The movable contact (121) may come into contact with and separate from the fixed contact (111) by the movement of the movable rod (120). By doing so, close and open operations can be performed. The blocking unit (100) may be a vacuum interrupter. If close and open operations are performed by the contact and separation of the contacts, it may belong to the blocking unit of the present invention.

[0232] A pressurizing part (200) may be provided on one side of the blocking part (100). The pressurizing part (200) may include a main body (210). The main body (210) may be a hollow tube shape with both sides open. An upper plate (220) may cover one side of the main body (210). The upper plate (220) may have an upper passage (221) open on both sides in the central area. A lower plate (230) may cover the other side of the main body (210). The lower plate (230) may have a lower passage (231) open on both sides in the central area. A movable rod (120) may be installed by penetrating the upper passage (221). The movable rod (120) may move to both sides of the upper passage (221). A pressure transmission plate (122) may be received inside the main body (210). The area of ​​the pressure transmission plate (122) may be larger than the upper passage (221). By doing so, the pressure transmission plate (122) may be prevented from moving outward from the main body (210). A pressure plate (321) may be installed facing the pressure transmission plate (122). The pressure plate (321) may be accommodated inside the main body (210). The area of ​​the pressure plate (321) may be larger than the lower passage (231). By doing so, the pressure plate (321) may be prevented from moving outward from the main body (210). A pressure spring (240) may be provided between the pressure transmission plate (122) and the pressure plate (321). The pressure spring (240) may be provided inside the main body (210). The pressure spring (240) may be a compression spring. The pressure spring (240) may be a cylindrical coil spring. One side of the pressure spring (240) may be in close contact with one side of the pressure transmission plate (122), and the other side of the pressure spring (240) may be in close contact with one side of the pressure plate (321). The pressure spring (240) can push the pressure transmission plate (122) while being compressed by the pressure plate (321). As the pressure transmission plate (122) is pushed, the fixed contact (111) and the movable contact (121) can be in close contact more firmly.

[0233] An operating unit (300) may be provided on one side of the pressurizing unit (200). The operating unit (300) may include a hollow housing (310) with both sides open. An upper cap (311) may cover one side of the housing (310) facing the pressurizing unit (200). The central area of ​​the upper cap (311) may have an upper passage (311a) with both sides open. A lower cap (312) may cover the other side of the housing (310). The central area of ​​the lower cap (312) may have a lower passage (312a) with both sides open. An movable member (320) may be provided at the center of the housing (310). The movable member (320) may pass through the lower passage (231) via the upper passage (311a). A pressure plate (321) may be provided at one end of the movable member (320) that extends through the lower passage (231). The movable member (320) may be movable to both sides of the upper passage (311a). The movable member (320) may be movable to both sides of the lower passage (312a). A support plate (322) may be fixedly installed on the other side of the movable member (320). The support plate (322) may have an area that can be accommodated inside the lower passage (312a). A plunger (330) may be provided between the support plate (322) and the upper cap (311) inside the housing (310). One side of the plunger (330) may be fixed to the support plate (322). The plunger (330) may move along the support plate (322). The plunger (330) may extend toward the upper cap (311). The plunger (330) may move to both sides of the lower moving passage (312a). A coil (340) may be provided between the plunger (330) and the housing (310). The coil (340) may extend from the upper cap (311) to the lower cap (312) while being wound clockwise or counterclockwise. When power is applied to the coil (340), a magnetic field may be formed around the coil (340). Due to the magnetic field, the actuator (320) may move to both sides of the coil (340).The direction of movement of the coil (340) can be determined by the polarity of the power applied to the coil (340). An open spring (350) may be provided between the plunger (330) and the actuator (320). The actuator (320) may be installed by penetrating the center of the open spring (350). The open spring (350) may be a compression spring. The open spring (350) may be a cylindrical coil spring. The open spring (350) is compressed during the closing operation, and during the opening operation, the elastic force of the open spring (350) can push the support plate (322) to the outside of the housing (310). That is, the open spring (350) can support the opening operation with the elastic force accumulated during the closing operation. One side of the open spring (350) may be in close contact with the inner surface of the upper cap (311), and the other side of the open spring (350) may be in close contact with the inner surface of the support plate (322).

[0234] The upper permanent magnet (361) can be installed on the upper cap (311). The magnetic field formed by the upper permanent magnet (361) can cause the movable member (320) to remain in a fixed state at the closed completion position.

[0235] The lower permanent magnet (362) can be installed on the lower cap (312). The magnetic field formed by the lower permanent magnet (362) can keep the movable member (320) in a fixed state at the open completed position.

[0236] The electromagnet actuator may include an operating part (300). At this time, the electromagnet actuator may include a pressurizing part (200).

[0237]

[0238] Hereinafter, with reference to FIGS. 19 to 21, the general closing and opening operations performed by the electromagnetic actuator of FIG. 19 will be described. Through the following description, the configuration described above may become clearer.

[0239] FIG. 20 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 19.

[0240] In FIG. 20, reference numeral 340 represents an equivalent circuit of the coil (340) of FIG. 19. Also, in FIG. 20, reference numeral 400 represents a power supply unit. The power supply unit (400) can be implemented with a capacitor (C).

[0241] Referring to FIGS. 19 and 20, when a close event starts, the close power of the power supply unit (400) can be applied to the coil (340). At this time, the actuator (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the coil (340). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) continues to move in the close direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the close direction. Also, as the pressure transmission plate (122) moves in the closing direction, the movable contact (121) can also move in the closing direction. As the actuator (320) continues to move in the closing direction, the movable contact (121) can begin touching the fixed contact (111). FIG. 20 illustrates that the movable contact (121) begins touching approximately 7 ms (milliseconds) after the start of the closing event. At this time, the movement distance of the movable contact (121) is approximately 13 mm.

[0242] Below. The point in time when the movable contact (121) begins to touch the fixed contact (111) is referred to as the ‘contact touch start time’.

[0243] When the closed power of the power supply unit (400) is continuously applied to the coil (340) beyond the contact touch start time, the pressure plate (321) can move toward the pressure transmission plate (122) while compressing the pressure spring (240) toward the pressure transmission plate (122). At this time, the pressure spring (240) can accumulate elastic force while being compressed toward the pressure transmission plate (122).

[0244] At this time, the closing operation can be completed when a closing limit point is reached where the pressure plate (321) can no longer move in the closing direction. FIG. 20 illustrates that the closing operation completion time is approximately 18 ms. Until the closing operation is completed, the movable contact (121) has moved approximately 17 mm. The closing limit point may be when the plunger (330) is in close contact with the inner surface of the upper cap (311). In the closed operation completion state, the movable member (320) can be fixed at the closing operation completion position by the upper permanent magnet (361).

[0245]

[0246] FIG. 21 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 19.

[0247] In FIG. 21, reference numeral 340 represents an equivalent circuit of the coil (340) of FIG. 19. In FIG. 21, the coil (340) may be the same as the coil used in the closed operation. Alternatively, in FIG. 21, the coil (340) may be different from the coil used in the closed operation. In FIG. 21, the coil (340) may be a coil for open operation separate from the coil used in the closed operation. Also, in FIG. 21, reference numeral 400-1 represents a power supply unit. The power supply unit (400-1) may be implemented as a capacitor (C). The capacitor (C) used in the power supply unit (400-1) may be the same as or different from the capacitor used in the closed operation.

[0248] Referring to FIGS. 19 and 21, when an open event starts, the open power of the power supply unit (400-1) can be applied to the coil (340). At this time, the actuator (320) can move in the open direction while releasing the compression of the open spring (350) by the magnetic field formed by the coil (340). At this time, the state in which the actuator (320) is fixed to the position of the closed operation completion by the upper permanent magnet (361) can be released by the magnetic field formed by the coil (340). Here, the 'open direction' refers to the direction in which the touch between the movable contact (121) and the fixed contact (111) is released. When the actuator (320) moves in the open direction, the elastic force of the open spring (350) and the elastic force of the pressure spring (240) gathered during the close operation can strongly push the actuator (320) in the open direction. At this time, the elastic force of the open spring (250) acts on the support plate (322), and the elastic force of the pressure spring (240) acts on the pressure plate (321).

[0249] The contact touch may be released during the initial stage when the actuator (320) moves to the open position. FIG. 21 illustrates the release of the contact when approximately 7 ms has elapsed from the start of the open event. The release of the contact begins when the actuator contact (121) has moved approximately 4 mm.

[0250] When the off power is cut off near the point where the contact touch is released, the opening operation can be completed by the elastic force of the open spring (250) and the elastic force of the pressure spring (240). FIG. 21 illustrates that the opening operation is completed when approximately 14 ms have elapsed from the start of the open event.

[0251]

[0252] Hereinafter, with reference to the attached FIGS. 19 to 28, details regarding how the electromagnetic actuator for the recloser performs the 'pulse closure operation function according to the current interruption method' will be explained. The above configuration may become clearer through the following explanation.

[0253]

[0254] Pulse closure operation based on the current interruption method is a method in which the closing power is cut off in advance before the closing is completed, rather than being applied until the closing is complete. This method includes a mechanism that performs the opening operation solely through the elastic force of the pressure spring and the open spring accumulated during the closing operation, without using a separate open power source during the CO (Close-Open) operation. Here, the completion of the closing operation refers to the state in which the actuator maintains the closed state by the upper permanent magnet. Depending on the design, the completion of the closing operation may also refer to the state in which the plunger is in close contact with the upper cap. Once the closing operation is completed, the force constraining the actuator by the upper permanent magnet cannot be overcome solely by the elastic force of the pressure spring and the open spring. In other words, once the closing operation is completed, a separate open power source must be applied to the coil to allow the actuator to escape from the constraint of the upper permanent magnet. Accordingly, the present invention secures only a preset contact touch holding time (e.g., 1 to 8.3 ms) before the close operation is completed during the CO (Close-Open) operation of the recloser, and cuts off the close operation power before the close operation is completed so that the open operation can be performed using only the elastic force of the pressure spring and the open spring.

[0255]

[0256] [Step 1 of Pulse Closure Operation According to Current Interruption Method]

[0257] FIG. 22 is a diagram illustrating the first step of pulse closure operation according to the current interruption method.

[0258] In FIG. 22, the switch (500) can control the power supply unit (400) supplying closed power to the coil (340).

[0259] A close event can be initiated while in an open state. When the close event is initiated, the close power of the power supply unit (400) can be applied to the coil (340). At this time, the actuator (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the coil (340). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) continues to move in the close direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the close direction.

[0260] When the pre-set close power-on time has elapsed from the start of the close event, the application of close power to the coil (340) may be stopped. At this time, the switch (500) may be turned off. The pre-set close power-on time is a time earlier than the time when the close operation is completed. Additionally, depending on the design of the actuator, the pre-set close power-on time may be a time earlier than the time when the contact touch begins. That is, the application of close power to the coil (340) may be stopped at either the time before the contact touch or after the contact touch. FIG. 22 illustrates a case where the application of close power to the coil (340) is stopped before the contact touch. The 'pre-set close power-on time' can be derived by analyzing the contact touch holding time while varying the time when the close power is cut off after the close power is applied. That is, the 'pre-set close power-on time' corresponding to the desired contact touch holding time can be easily obtained through experimentation. It may be easier in terms of design and control to make the pre-set close power-on time earlier than the time when the contact touch begins.

[0261]

[0262] [Step 2 of Pulse Closure Operation According to Current Interruption Method]

[0263] FIG. 23 is a diagram illustrating the second stage of pulse closure operation according to the current interruption method.

[0264] When the application of closed power to the coil (340) is interrupted according to the first step, the movable contact (121) can continue to move to the closed position due to inertia and the magnetic field formed by the upper permanent magnet (361). FIG. 23 illustrates that the contact touch is initiated in the second step.

[0265]

[0266] [Step 3 of Pulse Closure Operation According to Current Interruption Method]

[0267] FIG. 24 is a diagram illustrating the third step of pulse closure operation according to the current interruption method.

[0268] In the third step, the opening operation may be initiated by the elastic force of the opening spring (350) and the elastic force of the pressure spring (240). FIG. 24 illustrates a case where the opening operation proceeds after the closing operation proceeds slightly in the third step. In this case, the beginning of the third step may mean that the movable contact (121) continues to move to the closed position due to inertia and the magnetic field formed by the upper permanent magnet (361). Alternatively, the opening operation may be initiated immediately in the third step. The third step is an example of the contact touch holding time. Unlike the example in FIG. 24, the contact touch holding time may be secured through the second and third steps.

[0269]

[0270] [Step 4 of Pulse Closure Operation According to Current Interruption Method]

[0271] FIG. 25 is a diagram illustrating the fourth step of pulse closure operation according to the current interruption method.

[0272] In the fourth step, the opening operation can be performed by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). At this time, the contact touch state can be released. Unlike the open spring, which is affected by the upper permanent magnet, the pressure spring is not affected by the permanent magnet. Therefore, the pressure spring can effectively support the opening operation of the open spring.

[0273]

[0274] [Step 5 of Pulse Closure Operation According to Current Interruption Method]

[0275] FIG. 26 is a diagram illustrating the fifth step of pulse closure operation according to the current interruption method.

[0276] In the fifth step, the opening operation can be completed by the elastic force of the open spring (250) and the elastic force of the pressure spring (240).

[0277]

[0278] FIGS. 27 to 28 show the analysis of the magnetic field at the first to fifth time points in the pulse closure operation according to the current interruption method.

[0279]

[0280] Hereinafter, with reference to the attached FIGS. 29 to 39, an electromagnetic actuator for a dual-coil type recloser with a built-in pulse closure operation function according to the reverse current injection method will be described.

[0281]

[0282] Hereinafter, with reference to FIG. 29, an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to the present invention will be described.

[0283] FIG. 29 is a structural diagram of an electromagnetic actuator for a recloser (hereinafter referred to as 'electromagnetic actuator') with a built-in pulse closure operation function according to one embodiment of the present invention.

[0284] The blocking unit (100) can perform open and close operations by means of an electromagnet actuator. The blocking unit (100) may include a fixed rod (110) and a movable rod (120). A fixed contact (111) may be provided at one end of the fixed rod (110). And, a movable contact (121) may be opposite to the fixed contact (111). A movable contact (121) may be provided at one end of the movable rod (120). A pressure transmission plate (122) may be provided at the other end of the movable rod (120). The movable contact (121) may come into contact with and be separated from the fixed contact (111) by the movement of the movable rod (120). By doing so, close and open operations can be performed. The blocking unit (100) may be a vacuum interrupter. If the closing and opening operations are performed by the contact and separation of the contacts, it may be included in the blocking part (100) of the present invention.

[0285] A pressurizing part (200) may be provided on one side of the blocking part (100). The pressurizing part (200) may include a main body (210). The main body (210) may be a hollow tube shape with both sides open. An upper plate (220) may cover one side of the main body (210). The upper plate (220) may have an upper passage (221) open on both sides in the central area. A lower plate (230) may cover the other side of the main body (210). The lower plate (230) may have a lower passage (231) open on both sides in the central area. A movable rod (120) may be installed by penetrating the upper passage (221). The movable rod (120) may move to both sides of the upper passage (221). A pressure transmission plate (122) may be received inside the main body (210). The area of ​​the pressure transmission plate (122) may be larger than the upper passage (221). By doing so, the pressure transmission plate (122) may be prevented from moving outward from the main body (210). A pressure plate (321) may be installed facing the pressure transmission plate (122). The pressure plate (321) may be accommodated inside the main body (210). The area of ​​the pressure plate (321) may be larger than the lower passage (231). By doing so, the pressure plate (321) may be prevented from moving outward from the main body (210). A pressure spring (240) may be provided between the pressure transmission plate (122) and the pressure plate (321). The pressure spring (240) may be provided inside the main body (210). The pressure spring (240) may be a compression spring. The pressure spring (240) may be a cylindrical coil spring. One side of the pressure spring (240) may be in close contact with one side of the pressure transmission plate (122), and the other side of the pressure spring (240) may be in close contact with one side of the pressure plate (321). The pressure spring (240) can push the pressure transmission plate (122) while being compressed by the pressure plate (321). As the pressure transmission plate (122) is pushed, the fixed contact (111) and the movable contact (121) can be in close contact more firmly.

[0286] An operating unit (300) may be provided on one side of the pressurizing unit (200). The operating unit (300) may include a hollow housing (310) with both sides open. An upper cap (311) may cover one side of the housing (310) facing the pressurizing unit (200). The central area of ​​the upper cap (311) may have an upper passage (311a) with both sides open. A lower cap (312) may cover the other side of the housing (310). The central area of ​​the lower cap (312) may have a lower passage (312a) with both sides open. An movable member (320) may be provided at the center of the housing (310). The movable member (320) may pass through the lower passage (231) via the upper passage (311a). A pressure plate (321) may be provided at one end of the movable member (320) that extends through the lower passage (231). The movable member (320) may be movable to both sides of the upper passage (311a). The movable member (320) may be movable to both sides of the lower passage (312a). A support plate (322) may be fixedly installed on the other side of the movable member (320). The support plate (322) may have an area that can be accommodated inside the lower passage (312a). A plunger (330) may be provided between the support plate (322) and the upper cap (311) inside the housing (310). One side of the plunger (330) may be fixed to the support plate (322). The plunger (330) may move along the support plate (322). The plunger (330) may extend toward the upper cap (311). The plunger (330) may move to both sides of the lower moving passage (312a). A coil (340) may be provided between the plunger (330) and the housing (310). The coil (340) may include a closed coil (341) and an open coil (342). The closed coil (341) and the open coil (342) may be insulated from each other. The closed coil (341) may be formed from at least one coil.When the closed coil (341) is formed of multiple coils, each of the multiple coils is insulated from one another, and the multiple coils can be operated by at least one power source. The open coil (342) can be formed of at least one coil. When the open coil (342) is formed of multiple coils, each of the multiple coils is insulated from one another, and the multiple coils can be operated by at least one power source. FIG. 29 illustrates a case where the open coil (342) is positioned outside the closed coil (341). Alternatively, the closed coil (341) may be positioned outside the open coil (342). Alternatively, the closed coil (341) and the open coil (342) may be positioned vertically. That is, as long as the closed coil (341) and the open coil (342) are insulated from each other and the closed coil (341) supports the closed operation and the open coil (342) supports the open operation, there is no limit to the arrangement of the closed coil (341) and the open coil (342) and the number of the closed coil (341) and the open coil (342). To perform the pulse closure operation function according to the reverse current injection method, the arrangement of the closed coil (341) and the open coil (342) and the number of the closed coil (341) and the open coil (342) can be designed in various forms. Also, the closed coil (341) and the open coil (342) can be wound in the same direction or in different directions. Depending on the winding direction of the closed coil (341) and the open coil (342), the form of the power supply unit (500) for operating the closed coil (341) and the open coil (342) can be varied. The closed coil (341) and the open coil (342) can be electrically insulated. The form of the power supply unit (500) will be described later.

[0287] When power is applied to the close coil (341), a magnetic field can be formed around the close coil (341). Due to this magnetic field, the movable member (320) can move in the close direction.

[0288] When power is applied to the open coil (342), a magnetic field can be formed around the open coil (342). Due to this magnetic field, the actuator (320) can move in the open direction.

[0289] An open spring (350) may be provided between the plunger (330) and the actuator (320). The actuator (320) may be installed by penetrating the center of the open spring (350). The open spring (350) may be a compression spring. The open spring (350) may be a cylindrical coil spring. The open spring (350) is compressed during the closing operation, and during the opening operation, the elastic force of the open spring (350) can push the support plate (322) to the outside of the housing (310). That is, the open spring (350) can support the opening operation with the elastic force accumulated during the closing operation. One side of the open spring (350) may be in close contact with the inner surface of the upper cap (311), and the other side of the open spring (350) may be in close contact with the inner surface of the support plate (322).

[0290] The upper permanent magnet (361) can be installed on the upper cap (311). The magnetic field formed by the upper permanent magnet (361) can cause the movable member (320) to remain in a fixed state at the closed completion position.

[0291] The lower permanent magnet (362) can be installed on the lower cap (312). The magnetic field formed by the lower permanent magnet (362) can keep the movable member (320) in a fixed state at the open completed position.

[0292] The power supply unit (500) can supply operating power to the closed coil (341) and the open coil (342) through the power line (400). Hereinafter, the operating power supplied to the closed coil (341) is referred to as the closed power, and the operating power supplied to the open coil (342) is referred to as the open power.

[0293] The specific configuration of the power line (400) and the power unit (500) will be described later.

[0294] The electromagnet actuator may include an operating unit (300). At this time, the electromagnet actuator may include a pressurizing unit (200). Additionally, the electromagnet actuator may include a power line (400) and a power supply unit (500).

[0295]

[0296] Hereinafter, with reference to FIGS. 29 to 31, the general closing and opening operations performed by the electromagnetic actuator of FIG. 29 will be described. Through the following description, the configuration described above may become clearer.

[0297]

[0298] FIG. 30 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 29. FIG. 30 illustrates the result of performing a closing operation using the closing coil (341) of the electromagnet actuator of FIG. 29. In FIG. 30, the power supply unit (500) is implemented as a single capacitor (500a). In FIG. 30, the switch (500b) can interrupt the closing power supplied to the closing coil (341) through the power line (400). In FIG. 30, drawing number 341 represents the equivalent circuit of the closing coil.

[0299] When a close event starts, the switch (500b) can be turned on. When a close event starts, the power supply unit (500) can apply close power to the close coil (341). At this time, the movable member (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the close coil (341). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the movable member (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the movable member (320) continues to move in the close direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the close direction. And, as the pressure transfer plate (122) moves in the closing direction, the movable contact (121) can also move in the closing direction. As the actuator (320) continues to move in the closing direction, the closing operation can be completed. The time when the closing operation is completed may be the time when the distance the actuator (320) has moved in the closing direction during the closing operation is maximum. FIG. 30 illustrates that the time when the closing operation is completed is approximately 18 ms. By the time the closing operation is completed, the movable contact (121) has moved approximately 17 mm. When the closing operation is completed, the actuator (320) can be fixed in the closing operation completion position by the magnetic field formed by the upper permanent magnet (361). When the closing operation is completed, the plunger (330) can be fixed in close contact with one surface of the upper cap (311).

[0300]

[0301] FIG. 31 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 29. FIG. 31 illustrates the result of performing an open operation using the open coil (342) of the electromagnet actuator of FIG. 29. In FIG. 31, the power supply unit (500) is implemented as a single capacitor (500a). In FIG. 30, the switch (500b) can interrupt the open power supplied to the open coil (342) through the power line (400). In FIG. 31, drawing number 342 represents the equivalent circuit of the open coil.

[0302]

[0303] When the open event starts, the switch (500b) can be turned on. And, when the open event starts, the open power of the power supply unit (500) can be applied to the open coil (342). At this time, the magnetic field formed by the open coil (342) can move the actuator (320) in the open direction. Here, the 'open direction' refers to the direction in which the touch between the movable contact (121) and the fixed contact (111) is released. The magnetic field formed by the open coil (342) can release the state in which the actuator (320) is fixed in the position where the close operation is completed by the upper permanent magnet (361). When the actuator (320) moves in the open direction, the elastic force of the open spring (350) and the elastic force of the pressure spring (240) gathered during the close operation can strongly push the actuator (320) in the open direction. At this time, the elastic force of the open spring (250) acts on the support plate (322), and the elastic force of the pressure spring (240) can act on the pressure plate (321).

[0304] It is sufficient that the open power is applied in an amount sufficient to release the state in which the actuator (320) is fixed in the closed operation completion position by the upper permanent magnet (361). FIG. 31 illustrates that the supply of open power is interrupted when approximately 7 ms has elapsed from the start of the open event. When the off power is cut off, the open operation can be completed by the elastic force of the open spring (250) and the elastic force of the pressure spring (240). FIG. 31 illustrates that the open operation is completed when approximately 14 ms has elapsed from the start of the open event.

[0305]

[0306] Hereinafter, with reference to the attached FIGS. 29 to 38, details regarding how the electromagnetic actuator for the recloser performs the 'pulse closure operation function according to the reverse current injection method' will be explained. The above configuration may become clearer through the following explanation.

[0307]

[0308] The 'pulse closure operation method based on reverse current injection method' refers to a method in which, when an electromagnet actuator for a recloser performs the CO (Close-Open) duty, the closing operation is supported by a closing power source and the opening operation is supported by an opening power source. The timing at which the opening power source is applied in conjunction with the closing operation may vary. In order to secure the time (hereinafter referred to as 'contact touch holding time') during which the pre-set fixed contact (111) and the movable contact (121) maintain a touch state, any one of the following methods may be selectively applied: i) a method of applying the opening power source before the closing operation is completed; ii) a method of applying the opening power source around the time the closing operation is completed or at the time the closing operation is completed; and iii) a method of applying the opening power source after the closing operation is completed. At this time, any one of the following methods may be selectively applied: i) a method in which the closing power source is supplied until the time the closing operation is completed; and ii) a method in which the supply of the closing power source is stopped before the closing operation is completed. To secure the pre-set contact touch holding time, such methods may be appropriately and selectively applied depending on the design situation of the electromagnet actuator. Here, the design conditions of the electromagnet actuator may include the capacitor capacitance and discharge characteristics of the power supply unit, coil characteristics (coil impedance and magnetization characteristics), elastic characteristics of the open spring, elastic characteristics of the pressure spring, magnetic force characteristics of the upper permanent magnet, etc. In other words, the design conditions of the electromagnet actuator can be very diverse. In such diverse design conditions of the electromagnet actuator, the present invention can secure a preset contact touch holding time by adjusting the timing of application and interruption of the closed power and the open power. The design conditions of the electromagnet actuator to which the present invention is applied can be very diverse. Therefore, while applying the mechanism proposed by the present invention, it is desirable to experimentally determine the timing of application and interruption of the closed power and the open power to secure the preset contact touch holding time of the electromagnet actuator.To provide a pulse closure operation function, the electromagnetic actuator of the present invention may perform a closing operation by a closing power source and an opening operation by an opening power source in a continuous manner. At this time, the electromagnetic actuator of the present invention may secure a preset contact touch holding time during the transition from the closing operation to the opening operation. Here, the 'contact touch holding time' refers to the time during which the movable contact and the fixed contact touch (or, in other words, make contact) during the CO (Close-Open) operation according to the pulse closure operation method.

[0309]

[0310] FIGS. 33 to 38 illustrate a case where the supply of closed power to the closed coil is stopped before the completion of the closed operation, and open power is applied to the open coil before the completion of the closed operation.

[0311] The power supply unit (500) is composed of two circuits. The power supply unit (500) may include a first power supply unit (510) and a second power supply unit (520).

[0312] The first power supply unit (510) can supply closed power to the closed coil (341). The first power supply unit (510) may include a first capacitor (511) and a first switch (512). The first capacitor (511) can supply closed power to the closed coil (341). The first switch (512) can control the supply of closed power to the closed coil (341) by the first capacitor (511) through an on / off operation. The first power supply unit (510) can supply closed power to the closed coil (341) through the first power line (410).

[0313] The second power supply unit (520) can supply open power to the open coil (342). The second power supply unit (520) may include a second capacitor (521) and a second switch (522). The second capacitor (521) can supply open power to the open coil (342). The second switch (522) can control the supply of open power to the open coil (342) by the second capacitor (521) through an on / off operation. The second power supply unit (520) can supply open power to the open coil (342) through the second power line (420).

[0314] The first power supply unit (510) and the second power supply unit (520) can be electrically separated.

[0315]

[0316] [Step 1 of Pulse Closure Operation by Reverse Current Injection Method]

[0317] FIG. 32 is a diagram illustrating the first step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0318] A closing event can be initiated while in an open state. When the closing event is initiated, the closing power of the first power supply unit (510) can be applied to the closing coil (341). At this time, the actuator (320) can move in the closing direction while compressing the open spring (350) by the magnetic field formed by the closing coil (341). Here, the 'closing direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) continues to move in the closing direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the closing direction. By doing so, the pressure spring (240) can accumulate elastic force while being compressed in the close direction.

[0319]

[0320] [Step 2 of Pulse Closure Operation by Reverse Current Injection Method]

[0321] FIG. 33 is a diagram illustrating the second stage of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0322] In a situation where a closed power supply is supplied to the closed coil (341), an open power supply of the second power supply unit (520) can be supplied to the open coil (342). At this time, the magnetic field formed by the open coil (342) by the open power supply can weaken the magnetic field of the upper permanent magnet (361). As a result, the magnetic field of the upper permanent magnet (361) that fixes the actuator (320) in the closed operation completion position can be weakened. By weakening the magnetic field of the upper permanent magnet (361), the open operation can be performed even with a small open power supply.

[0323]

[0324] [Step 3 of Pulse Closure Operation by Reverse Current Injection Method]

[0325] FIG. 34 is a diagram illustrating the third step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0326] The supply of power to the close coil (341) may be stopped before the close operation is completed (Full Stroke point in FIG. 34, around 21 ms). At this time, the actuator (320) may move to the close operation completion point (Full Stroke point, 21 mm) due to inertia.

[0327] As the closing operation proceeds, the movable contact (121) may touch the fixed contact (111). FIG. 34 illustrates a case where the movable contact (121) and the fixed contact (111) touch each other when approximately 19 ms have elapsed since the closing operation began.

[0328] When a preset time has elapsed from the point at which the movable contact (121) and the fixed contact (111) are touched, the opening operation may be initiated by the magnetic field formed by the open coil (342). Depending on the design conditions and the desired contact touch holding time, the opening operation may be initiated without the movable member (320) moving to the full stroke point. FIG. 34 illustrates a case where the opening operation proceeds from about 21 ms (full stroke point). The opening operation may be accelerated by the elastic force of the open spring (350) and the elastic force of the pressure spring (240).

[0329]

[0330] [Step 4 of Pulse Closure Operation by Reverse Current Injection Method]

[0331] FIG. 35 is a diagram illustrating the fourth step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0332] The open operation can be sustained by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). At this time, the touch between the movable contact (121) and the fixed contact (111) can be released. That is, the movable contact (121) and the fixed contact (111) can be separated.

[0333] And, when a preset time has elapsed, the supply of open power to the open coil (342) may be stopped.

[0334] FIG. 35 illustrates a case where the supply of open power is interrupted approximately 27ms after the start of the close operation.

[0335]

[0336] [Step 5 of Pulse Closure Operation by Reverse Current Injection Method]

[0337] FIG. 36 is a diagram illustrating the fifth step of the pulse closure operation of the electromagnet manipulator of FIG. 29.

[0338] The opening operation can be completed by the elastic force of the open spring (250) and the elastic force of the pressure spring (240).

[0339] The power supply unit (500) may include a control unit (not shown) for controlling pulse closure operation according to the reverse current injection method described above. The control unit may perform closed power supply control, open power supply control, and switch control.

[0340]

[0341] FIGS. 37 and 38 are the results of finite element analysis of the magnetic field at the first to fifth time points in the pulse closure operation of the electromagnet actuator. The winding direction of the closed coil / the winding direction of the open coil / the circuit configuration between the power source and the coil can be determined to have magnetic field characteristics such as those shown in FIGS. 37 and 38.

[0342]

[0343] FIG. 39 is a structural diagram of an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to another embodiment of the present invention. The embodiment of FIG. 39 may have unique features compared to FIG. 29, such as the configuration of the power supply unit, the wiring of the power supply unit and the coil, and the winding direction of the coil.

[0344]

[0345] In FIGS. 39a and 39b, the power supply unit can be formed as a single circuit. In FIGS. 39a and 39b, the closed coil and the open coil can use a single power supply in common.

[0346]

[0347] Referring to FIG. 39a, the close coil (341a) can be wound in a first direction (e.g., forward or clockwise) as it moves from the first side to the second side. The first side of the close coil (341a) can be electrically connected to the first pole of the power supply unit (500a) or the capacitor (510a). The second side of the close coil (341a) can be electrically connected to the second pole of the power supply unit (500a) or the capacitor (510a). Additionally, the first switch (512a) can interrupt the power supply unit (500a) or the capacitor (510a) from supplying close power to the close coil (341a) according to a preset first timing. Here, the first timing may refer to the time when the closed power is supplied to the closed coil described above, the time when the closed power is maintained to the closed coil, and the time when the closed power is stopped to the closed coil.

[0348] The open coil (342a) can be wound in a second direction (e.g., reverse or counterclockwise) as it goes from the first side to the second side. Here, the second direction may be the opposite direction to the first direction. The first side of the open coil (342a) may be electrically connected to the first pole of the power supply unit (500a) or the capacitor (510a). The second side of the open coil (342a) may be electrically connected to the second pole of the power supply unit (500a) or the capacitor (510a). And, the second switch (522a) can interrupt the power supply unit (500a) or the capacitor (510a) from supplying open power to the open coil (342a) according to a preset second timing. Here, the second timing may refer to the time when open power is supplied to the open coil described earlier, the time for maintaining open power supply to the open coil, and the time when open power supply to the open coil is stopped.

[0349]

[0350] Referring to FIG. 39b, the close coil (341b) can be wound in a first direction (e.g., forward or clockwise) as it moves from the first side to the second side. The first side of the close coil (341b) can be electrically connected to the first pole of the power supply unit (500a) or the capacitor (510a). The second side of the close coil (341b) can be electrically connected to the second pole of the power supply unit (500a) or the capacitor (510a). Additionally, the first switch (512b) can interrupt the power supply unit (500b) or the capacitor (510b) from supplying close power to the close coil (341b) according to a preset first timing. Here, the first timing may refer to the time when the closed power is supplied to the closed coil described above, the time when the closed power is maintained to the closed coil, and the time when the closed power is stopped to the closed coil.

[0351] The open coil (342b) can be wound in a first direction (e.g., forward or clockwise) as it goes from the first side to the second side. That is, the closed coil (341b) and the open coil (342b) can be wound in the same direction as they go from the first side to the second side. The first side of the open coil (342b) can be electrically connected to the second pole of the power supply unit (500b) or the capacitor (510b). The second side of the open coil (342b) can be electrically connected to the first pole of the power supply unit (500b) or the capacitor (510b). And, the second switch (522b) can interrupt the power supply unit (500b) or the capacitor (510b) from supplying open power to the open coil (342b) according to a preset second timing. Here, the second timing may refer to the time when open power is supplied to the open coil described earlier, the time for maintaining open power supply to the open coil, and the time when open power supply to the open coil is stopped.

[0352]

[0353] Hereinafter, with reference to the attached FIGS. 40 to 49, an electromagnetic actuator for a single-coil type recloser with a built-in pulse closure operation function according to the reverse current injection method will be described.

[0354]

[0355] Hereinafter, with reference to FIG. 40, an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to the present invention will be described.

[0356] FIG. 40 is a structural diagram of an electromagnetic actuator for a recloser (hereinafter referred to as 'electromagnetic actuator') with a built-in pulse closure operation function according to one embodiment of the present invention.

[0357] The blocking unit (100) can perform open and close operations by means of an electromagnet actuator. The blocking unit (100) may include a fixed rod (110) and a movable rod (120). A fixed contact (111) may be provided at one end of the fixed rod (110). And, a movable contact (121) may be opposite to the fixed contact (111). A movable contact (121) may be provided at one end of the movable rod (120). A pressure transmission plate (122) may be provided at the other end of the movable rod (120). The movable contact (121) may come into contact with and separate from the fixed contact (111) by the movement of the movable rod (120). By doing so, close and open operations can be performed. The blocking unit (100) may be a vacuum interrupter. If close and open operations are performed by the contact and separation of the contacts, it may belong to the blocking unit of the present invention.

[0358] A pressurizing part (200) may be provided on one side of the blocking part (100). The pressurizing part (200) may include a main body (210). The main body (210) may be a hollow tube shape with both sides open. An upper plate (220) may cover one side of the main body (210). The upper plate (220) may have an upper passage (221) open on both sides in the central area. A lower plate (230) may cover the other side of the main body (210). The lower plate (230) may have a lower passage (231) open on both sides in the central area. A movable rod (120) may be installed by penetrating the upper passage (221). The movable rod (120) may move to both sides of the upper passage (221). A pressure transmission plate (122) may be received inside the main body (210). The area of ​​the pressure transmission plate (122) may be larger than the upper passage (221). By doing so, the pressure transmission plate (122) may be prevented from moving outward from the main body (210). A pressure plate (321) may be installed facing the pressure transmission plate (122). The pressure plate (321) may be accommodated inside the main body (210). The area of ​​the pressure plate (321) may be larger than the lower passage (231). By doing so, the pressure plate (321) may be prevented from moving outward from the main body (210). A pressure spring (240) may be provided between the pressure transmission plate (122) and the pressure plate (321). The pressure spring (240) may be provided inside the main body (210). The pressure spring (240) may be a compression spring. The pressure spring (240) may be a cylindrical coil spring. One side of the pressure spring (240) may be in close contact with one side of the pressure transmission plate (122), and the other side of the pressure spring (240) may be in close contact with one side of the pressure plate (321). The pressure spring (240) can push the pressure transmission plate (122) while being compressed by the pressure plate (321). As the pressure transmission plate (122) is pushed, the fixed contact (111) and the movable contact (121) can be in close contact more firmly.

[0359] An operating unit (300) may be provided on one side of the pressurizing unit (200). The operating unit (300) may include a hollow housing (310) with both sides open. An upper cap (311) may cover one side of the housing (310) facing the pressurizing unit (200). The central area of ​​the upper cap (311) may have an upper passage (311a) with both sides open. A lower cap (312) may cover the other side of the housing (310). The central area of ​​the lower cap (312) may have a lower passage (312a) with both sides open. An movable member (320) may be provided at the center of the housing (310). The movable member (320) may pass through the lower passage (231) via the upper passage (311a). A pressure plate (321) may be provided at one end of the movable member (320) that extends through the lower passage (231). The movable member (320) may be movable to both sides of the upper passage (311a). The movable member (320) may be movable to both sides of the lower passage (312a). A support plate (322) may be fixedly installed on the other side of the movable member (320). The support plate (322) may have an area that can be accommodated inside the lower passage (312a). A plunger (330) may be provided between the support plate (322) and the upper cap (311) inside the housing (310). One side of the plunger (330) may be fixed to the support plate (322). The plunger (330) may move along the support plate (322). The plunger (330) may extend toward the upper cap (311). The plunger (330) may move to both sides of the lower passage (312a). A coil (340) may be provided between the plunger (330) and the housing (310). The coil (340) may extend from the upper cap (311) to the lower cap (312) while being wound in a clockwise or counterclockwise direction. The coil (340) may be formed as at least one coil. The coil (340) may be formed as a plurality of coils. When power is applied to the coil (340), a magnetic field may be formed around the coil (340).Due to the magnetic field, the actuator (320) can move in both directions of the coil (340). The direction of movement of the coil (340) can be determined by the polarity of the power applied to the coil (340). An open spring (350) may be provided between the plunger (330) and the actuator (320). The actuator (320) may be installed by penetrating the center of the open spring (350). The open spring (350) may be a compression spring. The open spring (350) may be a cylindrical coil spring. The open spring (350) is compressed during the closing operation, and during the opening operation, the elastic force of the open spring (350) can push the support plate (322) to the outside of the housing (310). That is, the open spring (350) can support the opening operation with the elastic force accumulated during the closing operation. One side of the open spring (350) may be in close contact with the inner surface of the upper cap (311), and the other side of the open spring (350) may be in close contact with the inner surface of the support plate (322).

[0360] The upper permanent magnet (361) can be installed on the upper cap (311). The magnetic field formed by the upper permanent magnet (361) can cause the movable member (320) to remain in a fixed state at the closed completion position.

[0361] The lower permanent magnet (362) can be installed on the lower cap (312). The magnetic field formed by the lower permanent magnet (362) can keep the movable member (320) in a fixed state at the open completed position.

[0362] The power supply unit (500) can be connected to the coil (340) by the power line (400). The power supply unit (500) can supply operating power to the coil (340) through the power line (400). Hereinafter, the operating power supplied to the coil for the closing operation of the electromagnet actuator is referred to as the "closed power," and the operating power supplied to the coil for the opening operation of the electromagnet actuator is referred to as the "open power." The specific configuration of the power line (400) and the power supply unit (500) will be described later.

[0363] The electromagnet actuator may include an operating unit (300). At this time, the electromagnet actuator may include a pressurizing unit (200). Additionally, the electromagnet actuator may include a power line (400) and a power supply unit (500).

[0364]

[0365] Hereinafter, with reference to FIGS. 40 to 42, the general closing and opening operations performed by the electromagnetic actuator of FIG. 40 will be described. Through the following description, the configuration described above may become clearer.

[0366]

[0367] In FIG. 41, reference numeral 340 represents the equivalent circuit of the coil (340) of FIG. 40. Also, in FIG. 41, reference numeral 500 represents the power supply unit (500) of FIG. 40.

[0368] In FIG. 42, reference numeral 340 represents the equivalent circuit of the coil (340) of FIG. 40. Also, in FIG. 42, reference numeral 500 represents the power supply unit (500) of FIG. 40.

[0369] The power supply unit (500) includes a first power supply unit (510) and a second power supply unit (520). The first power supply unit (510) and the second power supply unit (520) are electrically connected in parallel to the coil (340).

[0370] The first power supply unit (510) can supply close power to the coil (340) when the electromagnet operator performs a close operation, and the second power supply unit (520) can supply open power to the coil (340) when the electromagnet operator performs an open operation. The first power supply unit (510) may include a capacitor for power supply. The second power supply unit (520) may include a capacitor for power supply. When the electromagnet operator performs a pulse close operation, the first power supply unit (510) and the second power supply unit (520) can supply power to the coil (340) according to preset timing.

[0371]

[0372] For convenience of explanation, FIGS. 41 and 42 illustrate a case in which a general closed operation and a general open operation are performed using only the first power supply unit (510). At this time, a simulation of a general closed operation and a general open operation was performed in a situation where the first power supply unit (510) supplies the closed power required for the closed operation and the first power supply unit (510) supplies the open power required for the open operation.

[0373]

[0374] FIG. 41 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 40.

[0375] Referring to FIGS. 40 and 41, when a close event starts, the power supply unit (500) can apply a close power supply to the coil (340). At this time, the actuator (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the coil (340). In the close operation, the plunger (330) can move together with the actuator (320). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) moves in the close direction, the pressure plate (321) can move in the close direction. Accordingly, the pressure spring (240) can be compressed in the closing direction and push the pressure transmission plate (122) in the closing direction. Accordingly, the pressure spring (240) can accumulate elastic force, and the movable contact (121) can move in the closing direction. As the movable contact (320) moves in the closing direction, the movable contact (121) can touch (or contact) the fixed contact (111). If the closing power is continuously supplied even after the point at which the movable contact (121) begins to touch the fixed contact (111), the movable contact (230) can continue to move in the closing direction. Accordingly, the open spring (350) and the pressure spring (240) can be further compressed and accumulate elastic force. When the closing power supply is stopped, the closing operation can be completed. The point at which the closing operation is completed may be the point at which the distance the movable contact (320) has moved in the closing direction during the closing operation is maximum.

[0376] FIG. 41 illustrates that the time at which the closing operation is completed is approximately 18 ms. Until the closing operation is completed, the movable contact (121) has moved approximately 17 mm. When the closing operation is completed, the movable member (320) can be fixed at the closing operation completion position by the magnetic field formed by the upper permanent magnet (361). When the closing operation is completed, the plunger (330) can be fixed in close contact with one surface of the upper cap (311).

[0377]

[0378] FIG. 42 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 40.

[0379] Referring to FIGS. 40 and 42, when an open event starts, the power supply unit (500) can apply open power to the coil (340). At this time, the actuator (320) can move in the open direction while releasing the compression of the open spring (350) by the magnetic field formed by the coil (340). At this time, the state in which the actuator (320) is fixed to the position of the closed operation completion by the upper permanent magnet (361) can be released by the magnetic field formed by the coil (340). Here, the 'open direction' refers to the direction in which the touch between the movable contact (121) and the fixed contact (111) is released. When the actuator (320) moves in the open direction, the elastic force of the open spring (350) and the elastic force of the pressure spring (240) gathered during the close operation can strongly push the actuator (320) in the open direction. At this time, the elastic force of the open spring (250) acts on the support plate (322), and the elastic force of the pressure spring (240) can act on the pressure plate (321).

[0380] In the initial stage when the actuator (320) moves to an open position, the movable contact (121) and the fixed contact (111) can be separated.

[0381] It is sufficient that the open power is applied in an amount sufficient to release the state in which the actuator (320) is fixed in the closed operation completion position by the upper permanent magnet (361). FIG. 42 illustrates that the supply of open power is stopped when approximately 7 ms has elapsed from the start of the open event. When the off power supply is stopped, the open operation can be completed by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). FIG. 42 illustrates that the open operation is completed when approximately 14 ms has elapsed from the start of the open event.

[0382]

[0383] Hereinafter, with reference to the attached FIGS. 40 to 49, details regarding how the electromagnetic actuator for the recloser performs the 'pulse closure operation function according to the reverse current injection method' will be explained. The above configuration may become clearer through the following explanation.

[0384]

[0385] First, I will explain the concept of the 'pulse closure operation method based on reverse current injection'.

[0386] The 'pulse closure operation method based on reverse current injection method' refers to a method in which, when an electromagnet actuator for a recloser performs the CO (Close-Open) duty, the closing operation is supported by a closing power source and the opening operation is supported by an opening power source. The timing at which the opening power source is applied in conjunction with the closing operation may vary. In order to secure the time (hereinafter referred to as 'contact touch holding time') during which the pre-set fixed contact (111) and the movable contact (121) maintain a touch state, any one of the following methods may be selectively applied: i) a method of applying the opening power source before the closing operation is completed; ii) a method of applying the opening power source around the time the closing operation is completed or at the time the closing operation is completed; and iii) a method of applying the opening power source after the closing operation is completed. At this time, any one of the following methods may be selectively applied: i) a method in which the closing power source is supplied until the time the closing operation is completed; and ii) a method in which the supply of the closing power source is stopped before the closing operation is completed. To secure the pre-set contact touch holding time, such methods may be appropriately and selectively applied depending on the design situation of the electromagnet actuator. Here, the design conditions of the electromagnet actuator may include the capacitor capacitance and discharge characteristics of the power supply unit, coil characteristics (coil impedance and magnetization characteristics), elastic characteristics of the open spring, elastic characteristics of the pressure spring, magnetic force characteristics of the upper permanent magnet, etc. In other words, the design conditions of the electromagnet actuator can be very diverse. In such diverse design conditions of the electromagnet actuator, the present invention can secure a preset contact touch holding time by adjusting the timing of application and interruption of the closed power and the open power. The design conditions of the electromagnet actuator to which the present invention is applied can be very diverse. Therefore, while applying the mechanism proposed by the present invention, it is desirable to experimentally determine the timing of application and interruption of the closed power and the open power to secure the preset contact touch holding time of the electromagnet actuator.To provide a pulse closure operation function, the electromagnetic actuator of the present invention may perform a closing operation by a closing power source and an opening operation by an opening power source in a continuous manner. At this time, the electromagnetic actuator of the present invention may secure a preset contact touch holding time during the transition from the closing operation to the opening operation. Here, the 'contact touch holding time' refers to the time during which the movable contact and the fixed contact touch (or, in other words, make contact) during the CO (Close-Open) operation according to the pulse closure operation method.

[0387]

[0388] Next, the configuration of the power supply unit applied to FIGS. 43 to 49 will be described.

[0389] The power supply unit (500) includes a first power supply unit (510) and a second power supply unit (520). The first power supply unit (510) and the second power supply unit (520) are electrically connected in parallel to the coil (340).

[0390] The first power supply unit (510) supplies closed power to the coil (340) when the electromagnet actuator performs a closed operation, and the second power supply unit (520) can supply open power to the coil (340) when the electromagnet actuator performs an open operation.

[0391] The first power supply unit (510) may include a capacitor for power supply. A first switch (511) may be installed between the first power supply unit (510) and the coil (340). The first switch (511) can control the supply of closed power from the first power supply unit (510) to the coil (340) through on and off operations.

[0392] The second power supply unit (520) may include a capacitor for power supply. A second switch (521) may be installed between the second power supply unit (520) and the coil (340). The second switch (521) can control the supply of open power from the second power supply unit (520) to the coil (340) through on and off operations.

[0393] When the electromagnet actuator performs a pulse closure operation, the first power supply unit (510) and the second power supply unit (520) can supply and cut off power to the coil (340) according to preset timing.

[0394] The power supply unit (500) may be provided with a control unit (not shown) that controls 1) the supply and cutoff of the closed power of the first power supply unit (510) and 2) the supply and cutoff of the open power of the second power supply unit (520) according to a preset timing. The control unit can control the timing of the supply and cutoff of the closed power and the timing of the supply and cutoff of the open power by controlling the first switch (511) and the second switch (521).

[0395]

[0396] Next, the embodiments of FIGS. 43 to 49 will be described.

[0397] FIGS. 43 to 49 illustrate cases where the supply of closed power to the coil is stopped before the completion of the closed operation, and open power is applied to the coil before the completion of the closed operation.

[0398]

[0399] [Step 1 of Pulse Closure Operation by Reverse Current Injection Method]

[0400] FIG. 43 is a diagram illustrating the first step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0401] A close event can be initiated while in an open state. When the close event is initiated, the first power supply unit (510) can apply close power to the coil (340). At this time, the movable member (320) can move in the close direction by the magnetic field formed by the coil (340). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the open spring (350) and the pressure spring (240) can accumulate elastic force while being compressed through the close direction. In the first stage, the second switch (521) is in an off state. That is, open power is not supplied to the coil (340) in the first stage.

[0402]

[0403] [Step 2 of Pulse Closure Operation by Reverse Current Injection Method]

[0404] FIG. 44 is a diagram illustrating the second stage of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0405] When the preset closed power application time has elapsed, the first power supply unit (510) may stop supplying closed power to the coil (340). FIG. 44 illustrates a case where the supply of closed power is stopped when approximately 16 ms have elapsed since the close event started.

[0406] And, the second power supply unit (520) can supply open power to the coil (340).

[0407] The point in time when the open power begins to be supplied to the coil (340) may be any one of the following: before the supply of the closed power is stopped, at the time when the supply of the closed power is stopped, or after the supply of the closed power is stopped. At this time, the point in time after the supply of the closed power is stopped may be any one of the following: before the completion of the close operation, at the time when the close operation is completed, or after the completion of the close operation.

[0408] FIG. 41 illustrates a case where open power begins to be supplied to the coil (340) at a point in time after the supply of closed power is interrupted, before the completion of the closed operation (at a point of about 17ms).

[0409] As described below, the magnetic field formed by the coil (340) by the open power supply can weaken the magnetic field of the upper permanent magnet (361). By doing so, the magnetic field of the upper permanent magnet (361) that fixes the actuator (320) in the closed operation completion position can be weakened. By weakening the magnetic field of the upper permanent magnet (361), the open operation can be performed even with a small open power supply.

[0410] Even if the application of closed power to the coil is stopped and open power is applied to the coil, the actuator (320) can move in the closed direction for a certain period of time due to inertia.

[0411]

[0412] [Step 3 of Pulse Closure Operation by Reverse Current Injection Method]

[0413] FIG. 45 is a diagram illustrating the third step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0414]

[0415] FIG. 45 illustrates a case where the time of completion of the close operation is approximately 18ms. Here, the time of completion of the close operation may be the time when the distance moved by the actuator (320) in the close direction during the close operation is maximum.

[0416] Before the closing operation is completed, the movable contact (121) and the fixed contact (111) may touch (or, in other words, come into contact) with each other. FIG. 45 illustrates a case where the movable contact (121) and the fixed contact (111) begin to touch at approximately 17 ms.

[0417] When the closed operation is completed by inertia while the closed power is stopped and the open power is applied to the coil (340), the open operation can be performed immediately by the magnetic field formed by the open coil (342), the open spring (350), and the pressure spring (240). Depending on the design conditions and the desired contact touch holding time, the open operation may be initiated without the actuator (320) moving to the full stroke point. The open operation can be accelerated by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). Also, since the magnetic field of the upper permanent magnet (361) is weakened by the open power applied before the close operation is completed, the actuator (320) can easily move in the open direction at the point where the close operation is completed by the open power.

[0418]

[0419] [Step 4 of Pulse Closure Operation by Reverse Current Injection Method]

[0420] FIG. 46 is a diagram illustrating the fourth step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0421] The open operation can be sustained by the magnetic field formed by the open coil (342), the open spring (350), and the pressure spring (240).

[0422] At this time, the touch between the movable contact (121) and the fixed contact (111) can be released. That is, the movable contact (121) and the fixed contact (111) can be separated. FIG. 46 illustrates a case where the touch between the movable contact (121) and the fixed contact (111) is released (or, in other words, separated) at approximately 23 ms.

[0423]

[0424] [Step 5 of Pulse Closure Operation by Reverse Current Injection Method]

[0425] FIG. 47 is a diagram illustrating the fifth step of the pulse closure operation of the electromagnet manipulator of FIG. 40.

[0426] The open operation can be sustained by the magnetic field formed by the open coil (342), the open spring (350), and the pressure spring (240).

[0427] And, the open operation can be completed. FIG. 47 illustrates a case where the open operation is completed in about 30ms.

[0428]

[0429] FIGS. 48 and 49 are the results of finite element analysis of the magnetic field at the first to fifth time points during the pulse closure operation of the electromagnet manipulator. Through FIGS. 48 and 49, the magnetic field distribution at the first to fifth time points during the pulse closure operation of the electromagnet manipulator of FIG. 40 can be confirmed.

[0430]

[0431] Hereinafter, an electromagnetic actuator for a recloser will be described with reference to the attached FIGS. 50 to 60.

[0432]

[0433] Hereinafter, with reference to FIG. 50, an electromagnetic actuator for a recloser with a built-in pulse closure operation function according to the present invention will be described.

[0434] FIG. 50 is a structural diagram of an electromagnetic actuator for a recloser (hereinafter referred to as 'electromagnetic actuator') with a built-in pulse closure operation function according to one embodiment of the present invention.

[0435] The blocking unit (100) can perform open and close operations by means of an electromagnet actuator. The blocking unit (100) may include a fixed rod (110) and a movable rod (120). A fixed contact (111) may be provided at one end of the fixed rod (110). And, a movable contact (121) may be opposite to the fixed contact (111). A movable contact (121) may be provided at one end of the movable rod (120). A pressure transmission plate (122) may be provided at the other end of the movable rod (120). The movable contact (121) may come into contact with and separate from the fixed contact (111) by the movement of the movable rod (120). By doing so, close and open operations can be performed. The blocking unit (100) may be a vacuum interrupter. If close and open operations are performed by the contact and separation of the contacts, it may belong to the blocking unit of the present invention.

[0436] A pressurizing part (200) may be provided on one side of the blocking part (100). The pressurizing part (200) may include a main body (210). The main body (210) may be a hollow tube shape with both sides open. An upper plate (220) may cover one side of the main body (210). The upper plate (220) may have an upper passage (221) open on both sides in the central area. A lower plate (230) may cover the other side of the main body (210). The lower plate (230) may have a lower passage (231) open on both sides in the central area. A movable rod (120) may be installed by penetrating the upper passage (221). The movable rod (120) may move to both sides of the upper passage (221). A pressure transmission plate (122) may be received inside the main body (210). The area of ​​the pressure transmission plate (122) may be larger than the upper passage (221). By doing so, the pressure transmission plate (122) may be prevented from moving outward from the main body (210). A pressure plate (321) may be installed facing the pressure transmission plate (122). The pressure plate (321) may be accommodated inside the main body (210). The area of ​​the pressure plate (321) may be larger than the lower passage (231). By doing so, the pressure plate (321) may be prevented from moving outward from the main body (210). A pressure spring (240) may be provided between the pressure transmission plate (122) and the pressure plate (321). The pressure spring (240) may be provided inside the main body (210). The pressure spring (240) may be a compression spring. The pressure spring (240) may be a cylindrical coil spring. One side of the pressure spring (240) may be in close contact with one side of the pressure transmission plate (122), and the other side of the pressure spring (240) may be in close contact with one side of the pressure plate (321). The pressure spring (240) can push the pressure transmission plate (122) while being compressed by the pressure plate (321). As the pressure transmission plate (122) is pushed, the fixed contact (111) and the movable contact (121) can be in close contact more firmly.

[0437] An operating unit (300) may be provided on one side of the pressurizing unit (200). The operating unit (300) may include a hollow housing (310) with both sides open. An upper cap (311) may cover one side of the housing (310) facing the pressurizing unit (200). The central area of ​​the upper cap (311) may have an upper passage (311a) with both sides open. A lower cap (312) may cover the other side of the housing (310). The central area of ​​the lower cap (312) may have a lower passage (312a) with both sides open. An movable member (320) may be provided at the center of the housing (310). The movable member (320) may pass through the lower passage (231) via the upper passage (311a). A pressure plate (321) may be provided at one end of the movable member (320) that extends through the lower passage (231). The movable member (320) may be movable to both sides of the upper passage (311a). The movable member (320) may be movable to both sides of the lower passage (312a). A support plate (322) may be fixedly installed on the other side of the movable member (320). The support plate (322) may have an area that can be accommodated inside the lower passage (312a). A plunger (330) may be provided between the support plate (322) and the upper cap (311) inside the housing (310). One side of the plunger (330) may be fixed to the support plate (322). The plunger (330) may move along the support plate (322). The plunger (330) may extend toward the upper cap (311). The plunger (330) may move to both sides of the lower moving passage (312a). A coil (340) may be provided between the plunger (330) and the housing (310). The coil (340) may extend from the upper cap (311) to the lower cap (312) while being wound clockwise or counterclockwise. When power is applied to the coil (340), a magnetic field may be formed around the coil (340). Due to the magnetic field, the actuator (320) may move to both sides of the coil (340).The direction of movement of the coil (340) can be determined by the polarity of the power applied to the coil (340). An open spring (350) may be provided between the plunger (330) and the actuator (320). The actuator (320) may be installed by penetrating the center of the open spring (350). The open spring (350) may be a compression spring. The open spring (350) may be a cylindrical coil spring. The open spring (350) is compressed during the closing operation, and during the opening operation, the elastic force of the open spring (350) can push the support plate (322) to the outside of the housing (310). That is, the open spring (350) can support the opening operation with the elastic force accumulated during the closing operation. One side of the open spring (350) may be in close contact with the inner surface of the upper cap (311), and the other side of the open spring (350) may be in close contact with the inner surface of the support plate (322).

[0438] The upper permanent magnet (361) can be installed on the upper cap (311). The magnetic field formed by the upper permanent magnet (361) can cause the movable member (320) to remain in a fixed state at the closed completion position.

[0439] The lower permanent magnet (362) can be installed on the lower cap (312). The magnetic field formed by the lower permanent magnet (362) can keep the movable member (320) in a fixed state at the open completed position.

[0440] The electromagnet actuator may include an operating part (300). At this time, the electromagnet actuator may include a pressurizing part (200).

[0441]

[0442] Hereinafter, with reference to FIGS. 50 to 52, the general closing and opening operations performed by the electromagnetic actuator of FIG. 50 will be described. Through the following description, the configuration described above may become clearer.

[0443] FIG. 51 is a diagram illustrating the general closing operation of the electromagnet actuator of FIG. 50.

[0444] In FIG. 51, reference numeral 340 represents the equivalent circuit of the coil (340) of FIG. 50. Also, in FIG. 51, reference numeral 400 represents a power supply unit. The power supply unit (400) can be implemented with a capacitor (C).

[0445] Referring to FIGS. 50 and 51, when a close event is initiated, the close power of the power supply unit (400) can be applied to the coil (340). At this time, the actuator (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the coil (340). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) continues to move in the close direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the close direction. Also, as the pressure transmission plate (122) moves in the closing direction, the movable contact (121) can also move in the closing direction. As the actuator (320) continues to move in the closing direction, the movable contact (121) can begin touching the fixed contact (111). FIG. 51 illustrates that the movable contact (121) begins touching approximately 7 ms (milliseconds) after the start of the closing event. At this time, the movement distance of the movable contact (121) is approximately 13 mm.

[0446] Below. The point in time when the movable contact (121) begins to touch the fixed contact (111) is referred to as the ‘contact touch start time’.

[0447] When the closed power of the power supply unit (400) is continuously applied to the coil (340) beyond the contact touch start time, the pressure plate (321) can move toward the pressure transmission plate (122) while compressing the pressure spring (240) toward the pressure transmission plate (122). At this time, the pressure spring (240) can accumulate elastic force while being compressed toward the pressure transmission plate (122).

[0448] At this time, the closing operation can be completed when a closing limit point is reached where the pressure plate (321) can no longer move in the closing direction. FIG. 51 illustrates that the closing operation completion time is approximately 18 ms. By the time the closing operation is completed, the movable contact (121) has moved approximately 17 mm. The closing limit point may be when the plunger (330) is in close contact with the inner surface of the upper cap (311). In the closed operation completion state, the movable member (320) can be fixed at the closing operation completion position by the upper permanent magnet (361).

[0449]

[0450] FIG. 52 is a diagram illustrating the general open operation of the electromagnet actuator of FIG. 50.

[0451] In FIG. 52, reference numeral 340 represents an equivalent circuit of the coil (340) of FIG. 50. In FIG. 52, the coil (340) may be the same as the coil used in the closed operation. Alternatively, in FIG. 52, the coil (340) may be different from the coil used in the closed operation. In FIG. 52, the coil (340) may be a coil for open operation separate from the coil used in the closed operation. Also, in FIG. 52, reference numeral 400-1 represents a power supply unit. The power supply unit (400-1) may be implemented as a capacitor (C). The capacitor (C) used in the power supply unit (400-1) may be the same as or different from the capacitor used in the closed operation.

[0452] Referring to FIGS. 50 and 52, when an open event starts, the open power of the power supply unit (400-1) can be applied to the coil (340). At this time, the actuator (320) can move in the open direction while releasing the compression of the open spring (350) by the magnetic field formed by the coil (340). At this time, the state in which the actuator (320) is fixed to the position of the closed operation completion by the upper permanent magnet (361) can be released by the magnetic field formed by the coil (340). Here, the 'open direction' refers to the direction in which the touch between the movable contact (121) and the fixed contact (111) is released. When the actuator (320) moves in the open direction, the elastic force of the open spring (350) and the elastic force of the pressure spring (240) gathered during the close operation can strongly push the actuator (320) in the open direction. At this time, the elastic force of the open spring (350) acts on the support plate (322), and the elastic force of the pressure spring (240) acts on the pressure plate (321).

[0453] The contact touch may be released during the initial stage when the actuator (320) moves to the open position. FIG. 52 illustrates that the contact is released when approximately 7 ms has elapsed from the start of the open event. The release of the contact begins when the actuator (320) has moved approximately 4 mm.

[0454] When the off power is cut off near the point where the contact touch is released, the opening operation can be completed by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). FIG. 52 illustrates that the opening operation is completed when approximately 14 ms have elapsed from the start of the open event.

[0455]

[0456] Hereinafter, with reference to the attached FIGS. 50 to 59, details regarding how the electromagnetic actuator for the recloser performs the 'pulse closure operation function according to the current interruption method' will be explained. The above configuration may become clearer through the following explanation.

[0457]

[0458] Pulse closure operation based on the current interruption method is a method in which the closing power is cut off in advance before the closing is completed, rather than being applied until the closing is complete. This method includes a mechanism that performs the opening operation solely through the elastic force of the pressure spring and the open spring accumulated during the closing operation, without using a separate open power source during the CO (Close-Open) operation. Here, the completion of the closing operation refers to the state in which the actuator maintains the closed state by the upper permanent magnet. Depending on the design, the completion of the closing operation may also refer to the state in which the plunger is in close contact with the upper cap. Once the closing operation is completed, the force constraining the actuator by the upper permanent magnet cannot be overcome solely by the elastic force of the pressure spring and the open spring. In other words, once the closing operation is completed, a separate open power source must be applied to the coil to allow the actuator to escape from the constraint of the upper permanent magnet. Accordingly, the present invention secures only a preset contact touch holding time (e.g., 1 to 8.3 ms) before the close operation is completed during the CO (Close-Open) operation of the recloser, and cuts off the close operation power before the close operation is completed so that the open operation can be performed using only the elastic force of the pressure spring and the open spring.

[0459]

[0460] [Step 1 of Pulse Closure Operation According to Current Interruption Method]

[0461] FIG. 53 is a diagram illustrating the first step of pulse closure operation according to the current interruption method.

[0462] In FIG. 53, the switch (500) can interrupt the power supply unit (400-1) from supplying closed power to the coil (340).

[0463] A close event can be initiated while in an open state. When the close event is initiated, the close power of the power supply unit (400-1) can be applied to the coil (340). At this time, the actuator (320) can move in the close direction while compressing the open spring (350) by the magnetic field formed by the coil (340). Here, the 'close direction' refers to the direction in which the movable contact (121) touches the fixed contact (111). At this time, the support plate (322) fixed to the actuator (320) can move toward the upper cap (311) and compress the open spring (350). At this time, the open spring (350) can accumulate elastic force while being compressed toward the upper cap (311). As the actuator (320) continues to move in the close direction, the pressure spring (240) and the pressure transmission plate (122) can also move in the close direction.

[0464] When the pre-set close power-on time has elapsed from the start of the close event, the application of close power to the coil (340) may be stopped. At this time, the switch (500) may be turned off. The pre-set close power-on time is a time earlier than the time when the close operation is completed. Additionally, depending on the design of the actuator, the pre-set close power-on time may be a time earlier than the time when the contact touch begins. That is, the application of close power to the coil (340) may be stopped at either the time before the contact touch or after the contact touch. FIG. 53 illustrates a case where the application of close power to the coil (340) is stopped before the contact touch. The 'pre-set close power-on time' can be derived by analyzing the contact touch holding time while varying the time when the close power is cut off after the close power is applied. That is, the 'pre-set close power-on time' corresponding to the desired contact touch holding time can be easily obtained through experimentation. It may be easier in terms of design and control to make the pre-set close power-on time earlier than the time when the contact touch begins.

[0465]

[0466] [Step 2 of Pulse Closure Operation According to Current Interruption Method]

[0467] FIG. 54 is a diagram illustrating the second stage of pulse closure operation according to the current interruption method.

[0468] When the application of closed power to the coil (340) is interrupted according to the first step, the movable contact (121) can continue to move to the closed position due to inertia and the magnetic field formed by the upper permanent magnet (361). FIG. 54 illustrates that the contact touch is initiated in the second step.

[0469]

[0470] [Step 3 of Pulse Closure Operation According to Current Interruption Method]

[0471] FIG. 55 is a diagram illustrating the third step of pulse closure operation according to the current interruption method.

[0472] In the third step, the opening operation may be initiated by the elastic force of the opening spring (350) and the elastic force of the pressure spring (240). FIG. 55 illustrates a case where the opening operation proceeds after the closing operation proceeds slightly in the third step. In this case, the beginning of the third step may mean that the movable contact (121) continues to move to the closed position due to inertia and the magnetic field formed by the upper permanent magnet (361). Alternatively, the opening operation may be initiated immediately in the third step. The third step is an example of the contact touch holding time. Unlike the example in FIG. 55, the contact touch holding time may be secured through the second and third steps.

[0473]

[0474] [Step 4 of Pulse Closure Operation According to Current Interruption Method]

[0475] FIG. 56 is a diagram illustrating the fourth step of pulse closure operation according to the current interruption method.

[0476] In the fourth step, the opening operation can be performed by the elastic force of the open spring (350) and the elastic force of the pressure spring (240). At this time, the contact touch state can be released. Unlike the open spring, which is affected by the upper permanent magnet, the pressure spring is not affected by the permanent magnet. Therefore, the pressure spring can effectively support the opening operation of the open spring.

[0477]

[0478] [Step 5 of Pulse Closure Operation According to Current Interruption Method]

[0479] FIG. 57 is a diagram illustrating the fifth step of pulse closure operation according to the current interruption method.

[0480] In the fifth step, the opening operation can be completed by the elastic force of the open spring (250) and the elastic force of the pressure spring (240).

[0481]

[0482] FIGS. 58 to 59 show the analysis of the magnetic field at the first to fifth time points in the pulse closure operation according to the current interruption method.

[0483]

[0484] Hereinafter, an electromagnetic actuator for a recloser according to another embodiment of the present invention will be described with reference to FIG. 60. In the following, details that overlap with the preceding description will be omitted or simplified. In FIG. 60, the same drawing numbers as those in FIG. 50 are assigned to the same components.

[0485]

[0486] Referring to FIG. 60, the blocking unit (100) can perform open and close operations by means of an electromagnet actuator. The blocking unit (100) may include a fixed rod (110) and a movable rod (120). A fixed contact (111) may be provided at one end of the fixed rod (110). A movable contact (121) may be positioned opposite the fixed contact (111). A movable contact (121) may be provided at one end of the movable rod (120). A pressure transmission plate (122) may be provided at the bottom of the movable rod (120). The movable contact (121) may come into contact with and be separated from the fixed contact (111) by the movement of the movable rod (120). By doing so, close and open operations can be performed. The blocking unit (100) may be a vacuum interrupter. If close and open operations are performed by the contact and separation of contacts, it may be included in the blocking part of the present invention.

[0487] A pressurizing part (200) may be provided on one side of the blocking part (100). The pressurizing part (200) may include a main body (210). The main body (210) may be a hollow tube shape with both sides open. An upper plate (220) may cover one side of the main body (210). The upper plate (220) may have an upper passage (221) open on both sides in the central area. A lower plate (230) may cover the other side of the main body (210). The lower plate (230) may have a lower passage (231) open on both sides in the central area. A movable rod (120) may be installed by penetrating the upper passage (221). The movable rod (120) may move to both sides of the upper passage (221). A pressure transmission plate (122) may be received inside the main body (210). The area of ​​the pressure transmission plate (122) may be larger than the upper passage (221). By doing so, the pressure transmission plate (122) may be prevented from moving outward from the main body (210). A pressure plate (321) may be installed facing the pressure transmission plate (122). The pressure plate (321) may be accommodated inside the main body (210). The area of ​​the pressure plate (321) may be larger than the lower passage (231). By doing so, the pressure plate (321) may be prevented from moving outward from the main body (210). A pressure spring (240) may be provided between the pressure transmission plate (122) and the pressure plate (321). The pressure spring (240) may be provided inside the main body (210). The pressure spring (240) may be a compression spring. The pressure spring (240) may be a cylindrical coil spring. One side of the pressure spring (240) may be in close contact with one side of the pressure transmission plate (122), and the other side of the pressure spring (240) may be in close contact with one side of the pressure plate (321). The pressure spring (240) can push the pressure transmission plate (122) while being compressed by the pressure plate (321). As the pressure transmission plate (122) is pushed, the fixed contact (111) and the movable contact (121) can be in close contact more firmly.

[0488] An operating unit (300) may be provided on one side of the pressurizing unit (200). The operating unit (300) may include a hollow housing (310) with both sides open. An upper cap (311) may cover one side of the housing (310) facing the pressurizing unit (200). The central area of ​​the upper cap (311) may have an upper passage (311a) with both sides open. A lower cap (312) may cover the other side of the housing (310). The central area of ​​the lower cap (312) may have a lower passage (312a) with both sides open. An movable member (320) may be provided at the center of the housing (310). The movable member (320) may pass through the lower passage (231) via the upper passage (311a). A pressure plate (321) may be provided at one end of the movable member (320) that extends through the lower passage (231). The movable member (320) may be movable to both sides of the upper passage (311a). The movable member (320) may be movable to both sides of the lower passage (312a). A support plate (322) may be fixedly installed on the other side of the movable member (320). The support plate (322) may have an area that can be accommodated inside the lower passage (312a). A plunger (330) may be provided between the support plate (322) and the upper cap (311) inside the housing (310). One side of the plunger (330) may be fixed to the support plate (322). The plunger (330) may move along the support plate (322). The plunger (330) may extend toward the upper cap (311). The plunger (330) may move to both sides of the lower moving passage (312a). A coil (340) may be provided between the plunger (330) and the housing (310). The coil (340) may extend from the upper cap (311) to the lower cap (312) while being wound clockwise or counterclockwise. When power is applied to the coil (340), a magnetic field may be formed around the coil (340). Due to the magnetic field, the actuator (320) may move to both sides of the coil (340).The direction of movement of the coil (340) can be determined by the polarity of the power applied to the coil (340). An open spring (350) may be provided between the plunger (330) and the actuator (320). The actuator (320) may be installed by penetrating the center of the open spring (350). The open spring (350) may be a compression spring. The open spring (350) may be a cylindrical coil spring. The open spring (350) is compressed during the closing operation, and during the opening operation, the elastic force of the open spring (350) can push the support plate (322) to the outside of the housing (310). That is, the open spring (350) can support the opening operation with the elastic force accumulated during the closing operation. One side of the open spring (350) may be in close contact with the inner surface of the upper cap (311), and the other side of the open spring (350) may be in close contact with the inner surface of the support plate (322).

[0489] The upper permanent magnet (361) can be installed on the upper cap (311). The magnetic field formed by the upper permanent magnet (361) can cause the movable member (320) to remain in a fixed state at the closed completion position.

[0490] The lower permanent magnet (362) can be installed on the lower cap (312). The magnetic field formed by the lower permanent magnet (362) can keep the movable member (320) in a fixed state at the open completed position.

[0491] The actuator (320) may be equipped with at least one arm (arm, 323, 324). The arm (323, 324) may extend to the side of the actuator (320).

[0492] The first arm (323) may be positioned on the side of the movable member (320). The first arm (323) may be formed integrally with or separately from the movable member (320). The first arm (323) may be fixed to the side of the movable member (320). The first arm (323) may extend outward from the side of the movable member (320). The first arm (323) may be formed between the lower plate (230) and the upper cap (311). In order to prevent the first arm (323) from colliding with the lower plate (230) or the upper cap (311) during the closing and opening operations of the actuator (320), the first arm (323) may be installed so as to be spaced apart from the lower plate (230) at the bottom of the lower plate (230) when the closing operation is completed, and the first arm (323) may be installed so as to be spaced apart from the upper cap (311) at the top of the upper cap (311) when the opening operation is completed.

[0493] The extension portion (320a) may extend to the lower part of the support plate (322). The extension portion (320a) may be formed in such a way that the movable member (320) penetrates the support plate (322) and extends to the lower part of the support plate (322). Alternatively, the extension portion (320a) may be manufactured separately from the movable member (320) and installed to be fixed to the lower part of the support plate (322) and extend to the lower part of the support plate (322).

[0494] The second arm (324) may be positioned on the side of the extension (320a) or at the bottom of the extension (320a). The second arm (324) may be formed integrally with or separately from the extension (320a). The second arm (324) may be fixed to the side of the extension (320a). The second arm (324) may extend outward from the side of the extension (320a).

[0495] The operating unit (300) may include at least one blocking unit. FIG. 60 illustrates a case where there are two blocking units. The blocking unit may restrict the movement of the actuator (320) during the closing operation as part of the pulse closing operation according to the current interruption method. At this time, the blocking unit may stop the movement of the plunger (330) before the plunger (330) pulled by the actuator (320) reaches the closing completion position. Specifically, through the blocking operation, the blocking unit may cause the plunger (330) to not be in close contact with the upper cap (311) during the closing operation, but to reach only a position that is spaced downward from the upper cap (311) at a predetermined distance.

[0496] The first blocking part (410) can restrict the movement of the movable member (320) between the lower plate (230) and the upper cap (311).

[0497] The first blocking part (410) may include a first blocking plate (411) and a first actuator (412).

[0498] The first actuator (412) can cause the first blocking plate (411) to be positioned in the movement path of the first arm (323) before the pulse closure operation according to the current interruption method begins. Accordingly, during the closing operation according to the pulse closure operation according to the current interruption method, the first arm (323) can only move up to the first blocking plate (411). Accordingly, the movement distance of the plunger (330) to the upper side is also limited, so that the movement of the plunger (330) can be stopped before the plunger (330) reaches the closing completion position.

[0499] The first blocking unit (410) can perform a blocking operation only when the actuator is performing a pulse closure operation. That is, it may not perform a blocking operation during normal close and open operations that are not pulse closure operations. That is, it may not perform a blocking operation during normal disconnection operations for grid connection that are not pulse closure operations.

[0500] The second blocking part (420) can restrict the movement of the actuator (320) at the bottom of the lower cap (312).

[0501] The second blocking part (420) may include a second blocking plate (421) and a second actuator (422).

[0502] The second actuator (422) can cause the second blocking plate (421) to be positioned in the movement path of the second arm (324) before the pulse closure operation according to the current interruption method begins. Accordingly, during the closing operation according to the pulse closure operation according to the current interruption method, the second arm (324) can only move up to the second blocking plate (421). Accordingly, the movement distance of the plunger (330) to the upper side is also limited, so that the movement of the plunger (330) can be stopped before the plunger (330) reaches the closing completion position.

[0503] The second blocking unit (420) can perform a blocking operation only when the actuator is performing a pulse closure operation. That is, it may not perform a blocking operation during normal close and open operations that are not pulse closure operations. That is, it may not perform a blocking operation during normal disconnection operations for grid connection that are not pulse closure operations.

[0504] The first blocking part (410) and the second blocking part (420) may be applied in whole or in part.

[0505] The control unit (500) can control the pulse closure operation, normal close and open operation, and blocking operation of the actuator. As described above, the control unit (500) can cause the blocking unit (410, 420) to perform a blocking operation on at least one of the first arm (323) and the second arm (324) before the pulse closure operation begins. That is, the control unit (500) can control the actuator (412, 422) so that the blocking plate (411, 421) blocks the movement path of the arm (323, 324) before the pulse closure operation begins.

[0506] In the absence of a blocking part, during the pulse closure operation according to the current interruption method, the plunger may reach the closed completion position due to inertia and the magnetic force of the upper permanent magnet, and the plunger may be constrained by the upper permanent magnet. That is, even though the plunger must perform the opening operation solely by the elastic force of the open spring (350) and the pressure spring (240), a situation may occur where the plunger is constrained by the upper permanent magnet and cannot perform the opening operation. The present invention can resolve such a situation through a blocking operation.

[0507] The electromagnet actuator may include an operating part (300). At this time, the electromagnet actuator may include a pressurizing part (200).

[0508]

[0509] Hereinafter, with reference to the attached FIGS. 61 and 62, an electromagnetic actuator including a detachable actuator structure will be described.

[0510]

[0511] Hereinafter, an electromagnetic actuator (hereinafter referred to as "actuator") according to a preferred embodiment of the present invention will be described with reference to FIG. 62.

[0512] FIG. 62 is a cross-sectional view of an electromagnetic actuator according to one embodiment of the present invention.

[0513]

[0514] The actuator (1000) may include a housing (100), a movable shaft (200), a coil (300), a movable member (410, 420), a support plate (500), an opening spring (600), and a separation spring (700).

[0515]

[0516] The housing (100) may include a receiving space on the inside. An upper cap (110) may be provided on the upper part of the housing (100). Additionally, a hole (110a) penetrating from the top to the bottom may be formed in the central area of ​​the upper cap (110).

[0517] The movable shaft (200) can extend from the top to the bottom. The movable shaft (200) can move in an upward or downward direction inside the housing (100). The movable shaft (200) can pass through the hole (110a). And, the movable shaft (200) can move in an upward or downward direction while being supported by the side of the hole (110a).

[0518] A coil (300) may be provided inside the housing (100). The coil (300) may be wound and extend from the top to the bottom. The coil (300) generates a magnetic field when power is applied, and the magnetic field can move the actuator (410, 420) in the upward and downward directions.

[0519] A movable member (410, 420) may be provided on the inner side of the coil. The movable member (410, 420) may be in a shape separated into an upper movable member (410) and a lower movable member (420).

[0520] The upper movable member (410) may include a first main body (411) and a first protrusion (412).

[0521] The first main body (411) can accommodate a movable shaft (200) that penetrates the first main body (411) from top to bottom in the central area. The upper surface of the first main body (411) can move upward and be in close contact with the upper cap (110) when the actuator closes. The closed state can be maintained by a permanent magnet (not shown) installed on the upper or upper side of the actuator (1000). At least a portion of the outer surface of the first main body (411) can move up and down while being guided by the inner surface of the housing (100).

[0522] The first protrusion (412) may be formed to extend downward from the outer area of ​​the lower surface of the first main body (411). The outer side of the first protrusion (412) may move up and down while being guided by the inner surface of the housing (100).

[0523] The lower movable member (420) may include a second main body (421) and a second protrusion (422).

[0524] The second body (421) may be positioned at the bottom of the upper movable member (410). At least a portion of the outer surface of the second body (421) may move up and down while being guided by the inner surface of the housing (100). Even when the opening operation is completed, the second body (421) may be supported by the inner surface of the housing (100). The second body (421) may accommodate a movable shaft (200) that penetrates the second body (421) from top to bottom in the central area. The movable shaft (200) may be fixed to the inner surface of the second body (421). Accordingly, the lower movable member (420) may be pulled by the movable shaft (200) and move up and down.

[0525] The second protrusion (422) may be formed to extend upward from the upper surface of the second body (421). At least a portion of the second protrusion (422) may be located inside the first protrusion (412). At least a portion of the outer surface of the second protrusion (422) may move up and down while being guided by the inner surface of the first protrusion (412).

[0526] Among the upper surfaces of the second main body (421), the upper surface (421a) located on the outer side of the second protrusion (422), and below, the "first upper surface" may face the lower surface of the first protrusion (412).

[0527] The upper surface (421b) (hereinafter referred to as the "second upper surface") located on the inner side of the second protrusion (422) among the upper surfaces of the second main body (421) may face the lower surface of the first main body (411).

[0528] The separation spring (700) may be a cylindrical spring. The separation spring (700) may be a compression coil spring. The separation spring (700) is installed inside the second protrusion (422) and may extend from the top to the bottom. The upper part of the separation spring (700) may be in close contact with the lower surface of the first body (411), and the lower part of the separation spring (700) may be in close contact with the second upper surface (421b).

[0529] The separation spring (700) can support the separation operation of the upper actuator (410) and the lower actuator (420) with the elastic force accumulated during the closing operation of the actuator. In other words, during the opening operation of the actuator, the separation spring (700) can push the lower actuator (420) downward with the elastic force.

[0530] The support plate (500) may be plate-shaped. The support plate (500) may be located at the bottom of the lower movable member (420). The support plate (500) may be spaced apart from the lower movable member (420).

[0531] The extension portion (510) may extend upward from the center area of ​​the upper surface of the support plate (500). The extension portion (510) may be formed integrally with the support plate (500) or formed separately from the support plate (500) and fixed to the support plate (500). The upper side of the extension portion (510) may be fixed to the movable shaft (200).

[0532] The lower cap (520) is fixed to the lower part of the housing (100) and can cap the lower part of the housing (100). The lower cap (520) can accommodate a second body (421) inside. The second body (421) can move up and down within the space inside the lower cap (520). An extension (510) can be installed by penetrating the central area of ​​the lower cap (520). The extension (510) can move up and down while penetrating the lower cap (520).

[0533] A stopper (521) may be provided in at least a portion of the lower cap (520) facing the second body (421). The stopper (521) may be a material for shock absorption (e.g., an elastic material).

[0534] The open spring (600) may be a cylindrical spring. The open spring (600) may be a compression coil spring.

[0535] The open spring (600) may be located on the outside of the second body (421). The open spring (600) may be arranged in multiple numbers. The open spring (600) may extend from the top to the bottom.

[0536] The upper part of the open spring (600) can be fixed to the housing (100). The lower part of the open spring (600) can be fixed to the upper surface of the support plate (500).

[0537] The opening spring (600) can support the opening operation of the actuator with the elastic force accumulated during the closing operation of the actuator. When the actuator opens, the opening spring (600) can push the support plate (500) downward. At this time, the stopper (521) and the lower actuator (420) can move downward along the support plate (500).

[0538]

[0539] Below, the opening operation of an actuator having the above structure is explained.

[0540]

[0541] First, open power can be supplied to the coil (300).

[0542] At this time, the lower movable member (420) can begin to move downward by the magnetic field formed by the coil (300) energized by the open power source. The lower movable member (420) can be installed further away from the permanent magnet (not shown) than the upper movable member (410). Therefore, the lower movable member (420) can move downward while being released from the closed state at a faster timing than the upper movable member (410). In addition, the lower movable member (420) is formed with a smaller size compared to the conventional movable member and has less weight, so it can move downward at a faster speed. The upper movable member (410) is also formed with a smaller size compared to the conventional movable member and has less weight, so it can move downward at a faster speed.

[0543] Additionally, the separation spring (700) can support the lower actuator (420) moving downward with elastic force. In other words, the separation spring (700) can support the lower actuator (420) being separated from the upper actuator (410) and moving downward with elastic force.

[0544] And, the open spring (600) can push the support plate (500) downward with elastic force. By doing so, the movable shaft (200) and the lower movable member (420) that are pulled by the support plate (500) can move downward.

[0545] That is, in the open operation, the separation spring (700) and the opening spring (600) can support movement to the lower part of the lower actuator (420), the movable shaft (200), and the support plate (500).

[0546] And, immediately after the lower actuator (420) moves, the upper actuator (410) can move downward by the magnetic field formed by the coil (300).

[0547] And, the lower actuator (420) can complete the opening operation while colliding with the upper actuator (410) during movement. At this time, the stopper (521) can absorb the impact between the upper actuator (410) and the lower actuator (420). In addition, the impact between the upper actuator (410) and the lower actuator (420) can be absorbed by the vibration of the opening spring (600).

[0548]

[0549] FIG. 61 is a cross-sectional view of an electromagnet actuator according to the prior art. In the prior art, the actuator (10) was formed as a single member. Therefore, there was a limit to increasing the opening operation speed due to the weight of the actuator (10).

[0550]

[0551] The present invention has a structure in which the actuator (10) is separated into upper and lower sections. Therefore, the load for the opening operation is low. Furthermore, the opening operation of the present invention can be supported by springs installed at multiple locations (multiple opening springs, separation springs) rather than a single spring. Accordingly, the present invention can provide a faster opening speed compared to the prior art. Accordingly, the opening characteristics of the circuit breaker can be improved.

Claims

It includes a plurality of coils that form a magnetic field to enable the actuator to perform open and close operations, and An electromagnet actuator characterized in that the plurality of coils are mutually insulated. In Article 1, A first space is provided between the outer surface of the above-mentioned actuator and the inner surface of the plunger, and An open spring is installed in the first space above, and An electromagnetic actuator characterized by the fact that, during an opening operation, the opening operation is accelerated by the restoring force of the opening spring. In Article 2, The plurality of coils are provided in a second space formed between the outer surface of the plunger and the inner surface of the housing, and An electromagnet actuator characterized in that the plurality of coils are arranged from top to bottom in the second space. In Article 2, The plurality of coils are provided in a second space formed between the outer surface of the plunger and the inner surface of the housing, and An electromagnet actuator characterized in that the plurality of coils are stacked from the inner side to the outer side of the second space. In Article 2, An electromagnetic actuator characterized by the plurality of coils being wound in the same direction.

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