Recloser controller for pulse operation

Abstract

The present invention relates to a recloser controller for pulse operation. According to an embodiment of the present invention, the recloser controller for pulse operation comprises: a first operation unit; a second operation unit disposed in front of the first operation unit; a movable rod unit comprising a movable rod and a pressing unit protruding radially from the movable rod; and a control unit for controlling electric currents flowing through a first coil unit and a second coil unit.

Description

Recloser actuator for pulse operation

[0001] The present invention relates to a recloser actuator for pulse operation. More specifically, the present invention relates to a recloser actuator for pulse operation configured to shorten the energization time when diagnosing a system fault.

[0002] The material described in this section merely provides background information for the present invention and does not constitute prior art.

[0003] When a power outage occurs on a distribution line, such as due to tree contact, a recloser installed in the system prevents the spread of the outage by interrupting the fault current. When a fault occurs, the recloser diagnoses and eliminates the fault by connecting and disconnecting (reclosing) the power source and load sides according to preset operational responsibilities.

[0004] However, when a fault occurs, the recloser first cuts off the power supply side and the load side and then re-energizes the power supply side and the load side to determine whether the fault has been resolved. This causes a problem in that the fault current flows into the system, damaging the devices that make up the system.

[0005] Therefore, in order to solve the problem caused by the reclosing operation of the existing recloser, the current flow time and magnitude for fault diagnosis after the initial blocking of the recloser when a fault occurs in the line must be minimized.

[0006] As a method for minimizing the current flow time and magnitude during fault diagnosis, a "pulse operation duty" has been proposed that diagnoses the fault status of the system based on a short-term pulse test of 3 to 8 ms, unlike the existing operation duty. In order to implement this pulse operation duty, the moving direction of the movable rod of the recloser actuator that connects or disconnects the power side and the load side (corresponding to the movable rod part of the present invention) must be able to quickly switch.

[0007] The present invention has been devised to solve the above-described problem, and provides a recloser actuator for pulse operation that can minimize the current flow time between the power side and the load side for fault diagnosis.

[0008] According to one embodiment of the present invention, a recloser actuator comprises: a first operating unit including a first coil portion, a first plunger having a first through-hole extending forward and backward and disposed inside the first coil portion, and a first magnetic block portion applying a magnetic force in a direction corresponding to a current flowing in the first coil portion to the first plunger; a second operating unit including a second coil portion, a second plunger having a second through-hole extending forward and backward and disposed inside the second coil portion, a second elastic member pressing the second plunger backward, and a second magnetic block portion applying a magnetic force in a direction corresponding to a current flowing in the second coil portion to the second plunger, and disposed in front of the first operating unit; a movable rod portion having a movable rod and a pressing portion protruding in a radial direction of the movable rod, coupled to the first plunger and movable in the forward and backward direction with respect to the second plunger, at least a portion of which is disposed to penetrate the first through-hole and the second through-hole; And it includes a control unit that controls the current flowing in the first coil unit and the second coil unit, the pressurizing unit is arranged at the rear of the second plunger, and at least a part of the movable range of the pressurizing unit overlaps with at least a part of the movable range of the second plunger.

[0009] Here, the first operating section may further include a first elastic member that presses the first plunger backward.

[0010] Here, the first magnetic block section may include a first upper magnetic block disposed between the second operating section and the first plunger and having a permanent magnet built in.

[0011] In addition, the first magnetic block portion includes a first side magnetic block arranged on the outer side in the lateral direction of the first plunger, and the lateral direction may be a direction perpendicular to the front-back direction.

[0012] Here, the second magnetic block portion may include a second upper magnetic block disposed in front of the second plunger and having a permanent magnet built in.

[0013] Here, the second operating unit may further include a second non-magnetic spacer coupled to the bottom surface of the second plunger.

[0014] Additionally, the second magnetic block portion may include a second side magnetic block disposed on the outer side of the second plunger.

[0015] Here, the control unit selectively performs control of any one mode among at least one mode including a pulse operation mode, and the control of the pulse operation mode may sequentially (a) control the current of the first coil part and the second coil part so that the first plunger moves backward and the second plunger moves forward, (b) control the current of the first coil part so that the first plunger moves forward, (c) control the current of the second coil part so that the second plunger moves backward, (d) control the current of the second coil part so that the movable rod part moves backward according to (c), and (e) control the current of the second coil part so that the second plunger moves forward and makes magnetic contact with the second magnetic block part.

[0016] The control unit can perform control for 3 to 8 ms from the time point at which control (b) is started to the time point at which control (d) is ended.

[0017] In addition, the control unit selectively performs control of any one mode among a plurality of modes including a pulse operation mode and a standard mode, and, in a state where a current is applied to the first coil unit so that the first magnetic block unit applies a magnetic force acting backward to the first plunger, (f) adjusts the current of the first coil unit so that the first plunger moves backward, (g) adjusts the current of the first coil unit so that the first plunger moves forward and makes magnetic contact with the first magnetic block unit, and (h) adjusts the direction of the current of the first coil unit so that the first plunger moves backward.

[0018] The recloser actuator of the present invention has a second plunger capable of pressing a pressure portion of a movable rod portion, and by pressing the pressure portion with the second plunger, the movable rod portion can be moved at a high speed, and accordingly, the current states of the power supply side and the load side can be switched at a very high speed.

[0019] Therefore, the present invention enables the pulse operation responsibility to minimize the fault current flowing into the line by performing fault diagnosis with a relatively small fault current and energization time compared to the existing reclosing fault diagnosis method.

[0020] FIG. 1 is a plan view of a recloser actuator according to one embodiment of the present invention.

[0021] FIG. 2 is a cross-sectional view showing a recloser actuator according to one embodiment of the present invention, taken along plane X of FIG. 1.

[0022] Figure 3 is a front view of a recloser actuator according to one embodiment of the present invention.

[0023] FIG. 4 is a cross-sectional view showing a recloser actuator according to one embodiment of the present invention, taken along plane Y of FIG. 1.

[0024] FIG. 5 is a drawing for explaining a pulse operation mode of a control unit according to one embodiment of the present invention.

[0025] FIG. 6 is a drawing for explaining a standard operation mode of a control unit according to one embodiment of the present invention.

[0026] According to one embodiment of the present invention, a recloser actuator comprises: a first operating unit including a first coil portion, a first plunger having a first through-hole extending forward and backward and disposed inside the first coil portion, and a first magnetic block portion applying a magnetic force in a direction corresponding to a current flowing in the first coil portion to the first plunger; a second operating unit including a second coil portion, a second plunger having a second through-hole extending forward and backward and disposed inside the second coil portion, a second elastic member pressing the second plunger backward, and a second magnetic block portion applying a magnetic force in a direction corresponding to a current flowing in the second coil portion to the second plunger, and disposed in front of the first operating unit; a movable rod portion having a movable rod and a pressing portion protruding in a radial direction of the movable rod, coupled to the first plunger and movable in the forward and backward direction with respect to the second plunger, at least a portion of which is disposed to penetrate the first through-hole and the second through-hole; And it includes a control unit that controls the current flowing in the first coil unit and the second coil unit, the pressurizing unit is arranged at the rear of the second plunger, and at least a part of the movable range of the pressurizing unit overlaps with at least a part of the movable range of the second plunger.

[0027] Here, the first operating section may further include a first elastic member that presses the first plunger backward.

[0028] Here, the first magnetic block section may include a first upper magnetic block disposed between the second operating section and the first plunger and having a permanent magnet built in.

[0029] In addition, the first magnetic block portion includes a first side magnetic block arranged on the outer side in the lateral direction of the first plunger, and the lateral direction may be a direction perpendicular to the front-back direction.

[0030] Here, the second magnetic block portion may include a second upper magnetic block disposed in front of the second plunger and having a permanent magnet built in.

[0031] Here, the second operating unit may further include a second non-magnetic spacer coupled to the bottom surface of the second plunger.

[0032] Additionally, the second magnetic block portion may include a second side magnetic block disposed on the outer side of the second plunger.

[0033] Here, the control unit selectively performs control of any one mode among at least one mode including a pulse operation mode, and the control of the pulse operation mode may sequentially (a) control the current of the first coil part and the second coil part so that the first plunger moves backward and the second plunger moves forward, (b) control the current of the first coil part so that the first plunger moves forward, (c) control the current of the second coil part so that the second plunger moves backward, (d) control the current of the second coil part so that the movable rod part moves backward according to (c), and (e) control the current of the second coil part so that the second plunger moves forward and makes magnetic contact with the second magnetic block part.

[0034] The control unit can perform control for 3 to 8 ms from the time point at which control (b) is started to the time point at which control (d) is ended.

[0035] In addition, the control unit selectively performs control of any one mode among a plurality of modes including a pulse operation mode and a standard mode, and, in a state where a current is applied to the first coil unit so that the first magnetic block unit applies a magnetic force acting backward to the first plunger, (f) adjusts the current of the first coil unit so that the first plunger moves backward, (g) adjusts the current of the first coil unit so that the first plunger moves forward and makes magnetic contact with the first magnetic block unit, and (h) adjusts the direction of the current of the first coil unit so that the first plunger moves backward.

[0036] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid ambiguity in the interpretation of the present invention. Like reference numerals refer to like elements throughout the specification.

[0037] While terms such as "first," "second," and "third" may be used herein to describe various components, these components are not limited by these terms. These terms are used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second" or "third" component, and similarly, the second and third components could be referred to interchangeably.

[0038] Hereinafter, a recloser actuator (1; hereinafter, a recloser actuator) for pulse operation according to an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a plan view of a recloser actuator according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a recloser actuator according to an embodiment of the present invention taken along a plane X of Fig. 1.

[0039] In this disclosure, the words upper, front and corresponding thereto refer to the upper side of Fig. 2, and the words lower, rear and corresponding thereto refer to the lower side of Fig. 2. In addition, in this disclosure, the words inner and corresponding thereto refer to the radially inward direction of the movable rod portion (300), and the words outer and corresponding thereto refer to the radially outward direction of the movable rod portion (300).

[0040] Referring to FIGS. 1 and 2, a recloser actuator (1) according to one embodiment of the present invention includes a first operating unit (100), a second operating unit (200), a movable rod unit (300), and a control unit (not shown).

[0041] The first operating unit (100) includes a first coil portion (110), a first plunger (120) having a first through hole extending in the front-rear direction and positioned inside the first coil portion (110), and a first magnetic block portion (150) that applies a magnetic force in a direction corresponding to a current flowing in the first coil portion (110) to the first plunger (120). A first permanent magnet (131) is included in the first magnetic block portion (150), and the first plunger (120) forms a magnetic circuit for making magnetic contact and maintaining contact with the first magnetic block portion (150). Specifically, the first plunger (120) is magnetized when current flows through the first coil (110) surrounding the first plunger (120) and receives a magnetic force from the first magnetic block portion (150) arranged adjacently, and the direction of this magnetic force corresponds to the current flowing through the first coil portion (120).

[0042] The second operating unit (200) includes a second plunger (220) disposed on the inside of the second coil portion (210) and having a second through hole penetrating in the front-back direction, a second elastic member (260) that presses the second plunger (220) backward, and a second magnetic block portion (250) that applies a magnetic force to the second plunger (220) in a direction corresponding to a current flowing in the second coil portion (210).

[0043] A second permanent magnet (231) is included in a second magnetic block portion (250), and a second plunger (220) forms a magnetic circuit for magnetic contact and contact maintenance with the second magnetic block portion (250). Specifically, the second plunger (220) is magnetized when current flows through the second coil (210) around the second plunger (220) and receives a magnetic force from the second magnetic block portion (250) arranged adjacently, and the direction of this magnetic force corresponds to the current flowing in the second coil portion (220). Here, the second operating portion (200) is arranged in front of the first operating portion (100).

[0044] The movable rod portion (300) has a movable rod (320) and a pressure portion (310) protruding in the radial direction of the movable rod (320), is coupled with the first plunger (120), and is movable in the forward and backward direction with respect to the second plunger (220), and at least a portion thereof is arranged to penetrate the first through hole and the second through hole.

[0045] Here, the pressurizing portion (310) is positioned at the rear of the second plunger (220), and at least a part of the operating range of the pressurizing portion (310) is positioned to overlap with at least a part of the operating range of the second plunger (220).

[0046] A control unit (not shown) controls the current flowing in the first coil portion (110) and the second coil portion (210). Controlling the current here basically means that the direction of the current can be adjusted, but the control unit may also be configured to additionally adjust the intensity of the current.

[0047] A first electrode connected to the power supply side and a second electrode connected to the load side may be arranged in front of the movable rod part (300). When the movable rod part (300) moves forward, the first electrode and the second electrode are arranged to come closer to each other, and when the movable rod part (300) moves forward a predetermined distance or more, the first electrode and the second electrode come into contact to conduct current between the power supply side and the load side. In order not to obscure the gist of the invention, this structural arrangement is not illustrated, but it will be clearly understood by those skilled in the art.

[0048] Hereinafter, when the movable load part (300) is in a position where the power side and the load side are energized, the movable load part (300) is said to be in a 'closed position', and when the movable load part (300) is located behind the closed position and the power side and the load side are mutually disconnected, the movable load part (300) is said to be in an 'open position'.

[0049] Conventional reclosers move a movable rod part by a single plunger. On the other hand, the recloser actuator (1) of the present invention has, in addition to the first plunger (120) coupled to the movable rod part (300), a second plunger (220) capable of pressing a pressurizing portion (310) of the movable rod part (300). By pressing the pressurizing portion (310) by the second plunger (220), the movable rod part (300) can be moved to the open position at a high speed, and accordingly, the recloser actuator (1) of the present invention can switch the current states of the power supply side and the load side at a very high speed. Therefore, the present invention enables a pulse operation task to minimize the fault current flowing into the line by performing a fault diagnosis with a relatively small fault current and current-carrying time compared to the existing reclosing fault diagnosis method. Hereinafter, each component of the recloser actuator (1) of the present invention will be described in more detail.

[0050] In one embodiment, the first operating unit (100) includes a first bobbin (111), a first coil portion (110), a first plunger (120), a first magnetic block portion (150), a first elastic member (160), and a first non-magnetic spacer (170). Here, the first magnetic block portion (150) may include a first upper magnetic block (130), a first side magnetic block (140), and a first lower magnetic block (600).

[0051] The first bobbin (111) has a first bobbin body in the shape of a rectangular parallelepiped with an open top and bottom, and a first coil portion (110) is wrapped around the first bobbin body. In addition, in order to prevent the first coil portion (110) from moving unintentionally in the front-back direction, the first bobbin (111) may have a first flange portion that is bent outward from the upper and lower ends of the first bobbin body. However, the shape of the first bobbin (111) is not limited to the illustrated shape, and the first bobbin (111) may have a cylindrical body, for example. A first plunger (120) is arranged on the inside of the first coil portion (110), and in one embodiment, the first plunger (120) is arranged inside the first bobbin (111).

[0052] The first plunger (120) has a first through-hole extending in the front-back direction and is disposed inside the first coil portion (110). It can move by receiving a magnetic force in a direction corresponding to the current flowing in the first coil portion (110) from the first magnetic block portion (150). A pressure rod portion and a first elastic member (160) that pressurizes the first plunger (120) backward can be disposed inside the first through-hole of the first plunger (120).

[0053] The first plunger (120) may include a first plunger block (121) in the shape of a rectangular parallelepiped and a first plunger cylinder (122) in the shape of a cylinder that protrudes downward from the lower end surface of the first plunger block (121), and the first through-hole may be divided into a portion having a first diameter and in which a first elastic member (160) is accommodated, and a portion having a second diameter smaller than the first diameter below the portion. The portion of the first through-hole where the diameter changes may be located in the first plunger block (121), and the lower portion of the first elastic member (160) may be supported by the first plunger block (121). The first plunger (120) is coupled to a movable rod portion (300) and moves in conjunction with the movable rod portion (300). In one embodiment, the lower part of the movable rod portion (300) can be press-fitted into a portion having a smaller diameter of the first through hole.

[0054] The first elastic member (160) is supported by the first upper magnetic block (130) and the first plunger (120) and presses the first plunger (120) backward. That is, the first elastic member (160) can apply a force to push the first plunger (120) backward together with the force of the first magnetic block (150) to push the first plunger (120). The two forces allow the first plunger (120) to move backward more quickly.

[0055] The first magnetic block part (150) applies a magnetic force in a direction corresponding to the current flowing in the first coil part (110) to the first plunger (120). The first magnetic block part (150) includes a permanent magnet (131) and forms a magnetic circuit so that the first plunger (120) can maintain a closed position. In one embodiment, the first magnetic block part (150) includes a first side magnetic block (140) arranged on the outside in the lateral direction (perpendicular to the front-back direction) of the first plunger (120), a first upper magnetic block (130) arranged between the second operating part (200) and the first plunger (120), and a first lower magnetic block (600) arranged under the first plunger (120).

[0056] In one embodiment, the first side magnetic block (140) has a rectangular shape with an open top and bottom, and accommodates a first coil portion (110), a first bobbin (111), a portion of the first plunger (120), a first elastic member (160), and a portion of the movable rod portion (300) therein. The first upper magnetic block (130) covers the open upper end of the first side magnetic block (140), and the first lower magnetic block (600) covers the open lower end of the first side magnetic block (140). A hollow is formed in each of the first upper magnetic block (130) and the first lower magnetic block (600) into which the first plunger (120) and the movable rod portion (300) can be inserted. The first upper magnetic block (130) may include a first inner magnetic block (133) having a through hole formed therein through which the movable rod part (300) passes, a pair of first permanent magnets (131) arranged on the outside of the first inner magnetic block (133), and a pair of first outer magnetic blocks (132) arranged on the outside of the first permanent magnets (131).

[0057] In one embodiment of the present invention, the first magnetic block portion (150) applies a force to move the first plunger (120) according to the state of the current flowing in the first coil portion (110), and also serves as a housing that accommodates and protects the first coil portion (110), the first plunger (120), etc. That is, one embodiment of the present invention has the advantage of being small in volume and reducing production costs because it does not separately provide a magnetic material necessary for applying a magnetic force to the first plunger (120) and a case for accommodating them.

[0058] A first non-magnetic spacer (170) may be coupled to the first plunger (120) to minimize the magnetic contact force with the first magnetic block portion (150) in the open position and to maintain the open position only with the first elastic member (160). Specifically, the first non-magnetic spacer (170) may be coupled to the bottom surface of the first plunger block (121) and minimizes the magnetic contact force with the first lower magnetic block (600) when the first plunger (120) moves downward.

[0059] The second operating unit (200) is positioned in front of the first operating unit (100) and, in addition to the driving force applied to the movable rod unit (300) by the first operating unit (100), applies an additional driving force to the movable rod unit (300), thereby increasing the driving speed of the movable rod unit (300). With this configuration, it is possible to control a pulse operation mode that quickly retracts the movable rod unit (300) from the closed position to the open position. The pulse operation mode will be described in detail later.

[0060] The second operating unit (200) includes all or part of the second bobbin (211), the second coil portion (210), the second plunger (220), the second magnetic block portion (250), the second elastic member (260), and the second non-magnetic spacer (270).

[0061] The second magnetic block section (250) may include a second upper magnetic block (230), a second side magnetic block (240), and a second lower magnetic block (400).

[0062] The second bobbin (211) has a second bobbin (211) body in the shape of a rectangular parallelepiped with an open top and bottom, and a second coil portion (210) is wrapped around the periphery of the second bobbin (211) body. In addition, in order to prevent the second coil portion (210) from moving unintentionally in the front-back direction, the second bobbin (211) may have a second flange that is bent outward from the upper and lower ends of the second bobbin (211) body. However, the shape of the second bobbin (211) is not limited to the example, and the second bobbin (211) may have a cylindrical body, for example. A second plunger (220) is disposed on the inside of the second coil portion (210), and in one embodiment, the second plunger (220) is disposed inside the second bobbin (211).

[0063] The second plunger (220) has a second through hole extending in the front-back direction and is disposed inside the second coil portion (210). The second plunger (220) receives a magnetic force from a second magnetic block portion (250) disposed close to the second plunger (220), and the direction of the magnetic force varies depending on the current flowing in the second coil portion (210). A pressure rod portion and a second elastic member (260) that pressurizes the second plunger (220) backward may be disposed inside the second through hole of the second plunger (220).

[0064] The second plunger (220) has a rectangular parallelepiped shape, and the second through hole can be divided into a portion having a third diameter and a portion where a second elastic member (260) is accommodated inside, and a portion having a fourth diameter smaller than the third diameter below it. Here, the third diameter may correspond to the first diameter of the first through hole, and the fourth diameter may correspond to the second diameter of the first through hole.

[0065] The second magnetic block part (250) applies a magnetic force in a direction corresponding to the current flowing in the second coil part (210) to the second plunger (220). The second magnetic block part (250) has a permanent magnet (231) built in and forms a magnetic circuit so that the second plunger (220) can maintain a closed position. In one embodiment, the second magnetic block part (250) includes a second side magnetic block (240) arranged on the outer side of the second plunger (220), a second upper magnetic block (230) arranged in front of the second plunger (220), and a second lower magnetic block (400) arranged in the rear of the second plunger (220).

[0066] The second elastic member (260) is supported by the second upper magnetic block (230) and the second plunger (220) and presses the second plunger (220) backward. That is, when the second coil portion (210) applies a magnetic force to push the second plunger (220), the second elastic member (260) can apply a force to push the second plunger (220) backward together with this magnetic force. The two forces allow the second plunger (220) to move backward more quickly. Therefore, by pressing the pressurizing portion (310) of the movable rod portion (300) while the second plunger (220) moves backward, the movable rod portion (300) can be quickly moved from the closed position to the open position.

[0067] In one embodiment, the second side magnetic block (240) has a rectangular shape with an open top and bottom, and accommodates a second coil portion (210), a second bobbin (211), a portion of the second plunger (220), a second elastic member (260), and a portion of the movable rod portion (300) therein. The second upper magnetic block (230) covers the open upper end of the second side magnetic block (240), and the second lower magnetic block (400) covers the open lower end of the second side magnetic block (240). A through hole is formed in each of the second upper magnetic block (230) and the second lower magnetic block (400) through which the second plunger (220) and the movable rod portion (300) pass. The second upper magnetic block (230) may include a second inner magnetic block (233) having a through hole formed therein through which the movable rod part (300) passes, a pair of second permanent magnets (231) arranged on the outside of the second inner magnetic block (233), and a pair of second outer magnetic blocks (232) arranged on the outside of the second permanent magnets (231).

[0068] Meanwhile, a non-magnetic block (420) is positioned below the second sub-magnetic block (400), so that the magnetic circuits of the first operating unit (100) and the second operating unit (200) can be separated.

[0069] In one embodiment, the movable rod portion (300), the first elastic member (160), the second elastic member (260), the first magnetic block portion (150), the second magnetic block portion (250), the first bobbin (111), the second bobbin (211), the first coil portion (110), the second coil portion (210), the first plunger (120), and the second plunger (220) are coaxially arranged.

[0070] In one embodiment of the present invention, the second magnetic block portion (250) applies a force to move the second plunger (220) according to the state of the current flowing in the second coil portion (210), and also serves as a housing that accommodates and protects the second coil portion (210), the second plunger (220), etc. That is, one embodiment of the present invention has the advantage of being small in volume and reducing production costs because it does not separately provide a magnetic material necessary for applying a magnetic force to the second plunger (220) and a case for accommodating them.

[0071] A second non-magnetic spacer (270) may be coupled to the second plunger (220) to minimize the magnetic contact force with the second magnetic block portion (250) and to maintain the open position with only the second elastic member (260). Specifically, the second non-magnetic spacer (270) may be coupled to the bottom surface of the second plunger block (220) and minimizes the magnetic contact force with the second lower magnetic block (400) when the second plunger (220) moves downward.

[0072] Meanwhile, a bearing (410) may be coupled to the outer circumference extending in the downward direction of the second non-magnetic spacer (270). At this time, the downward direction may be the direction of the second lower magnetic block (400) and the non-magnetic block (420).

[0073] That is, the bearing (410) can come into contact with the inner side of the second sub-magnetic block (400) and the non-magnetic block (420).

[0074] Additionally, the bearing (410) may be a DU BUSH.

[0075] The movable rod portion (300) has a movable rod (320) and a pressure portion (310) protruding in the radial direction of the movable rod (320), is coupled with the first plunger (120), and is movable forward and backward with respect to the second plunger (220), and at least a portion thereof is disposed inside by penetrating the first through hole and the second through hole. Here, the pressure portion (310) is disposed at the rear of the second plunger (220), and at least a portion of the movable range of the pressure portion (310) overlaps with at least a portion of the movable range of the second plunger (220).

[0076] Since at least a portion of the movable range of the pressurizing portion (310) overlaps with at least a portion of the movable range of the second plunger (220), when the second plunger (220) moves rearward a predetermined distance or more, the pressurizing portion (310) is pressed rearward by the second plunger (220), and the movable rod portion (300) can be displaced rearward at a high speed by this pressing. Here, the force with which the second plunger (220) presses the pressurizing portion (310) can contribute to pushing the movable rod portion (300) rearward together with the force with which the first operating portion (100) pushes the first plunger (120) rearward, and the superposition of the two forces allows the movable rod portion (300) to move to the open position more quickly.

[0077] In one embodiment, the through hole formed in the second lower magnetic block (400) has a larger diameter than the pressurizing portion (310), and at least a portion of the pressurizing portion (310) is arranged in the through hole formed in the second lower magnetic block (400). One embodiment of the present invention has the effect of quickly moving the movable rod portion (300) to the open position and the effect of reducing the production cost and volume of the recloser actuator (1) by optimizing the arrangement of each component in this way.

[0078] Figure 3 is a front view of a recloser actuator according to one embodiment of the present invention.

[0079] Referring to FIGS. 2 and 3, a first lateral coupling member (10) may be provided that couples the first inner magnetic block (133), the first permanent magnet (131), and the first outer magnetic block (132) of the first upper magnetic block (130). The first lateral coupling member (10) may include a first plate-shaped member (11), and a first bolt (12, 13) that penetrates the first plate-shaped member (11) and the first outer magnetic block (132).

[0080] Likewise, a second lateral coupling member (20) may be provided that couples the second inner magnetic block (233), the second permanent magnet (231), and the second outer magnetic block (232) of the second upper magnetic block (230). The second lateral coupling member (20) may include a second plate-shaped member (21), and a second bolt (22, 23) that penetrates the second plate-shaped member (21) and the second outer magnetic block (232).

[0081] FIG. 4 is a cross-sectional view showing a recloser actuator according to one embodiment of the present invention, taken along plane Y of FIG. 1.

[0082] Referring to FIGS. 2 to 4, a recloser actuator (1) according to one embodiment has a front-rear coupling member (30) that mutually couples a base plate (500), a second upper magnetic block (230), a second side magnetic block (240), a second lower magnetic block (400), a first upper magnetic block (130), a first side magnetic block (140), and a first lower magnetic block (600). The front-rear coupling member (30) has a coupling rod (31), an upper bolt (33), and a lower bolt (32). A coupling rod (31) is inserted into a through hole that sequentially passes through the base plate (500), the second upper magnetic block (230), the second side magnetic block (240), the second lower magnetic block (400), the first upper magnetic block (130), the first side magnetic block (140), and the first lower magnetic block (600), and the upper bolt (33) and the lower bolt (32) are screw-connected to the upper end of the coupling rod (31) and the lower end of the coupling rod, respectively. By tightening the upper bolt (33) and the lower bolt (32), the components therebetween can be mutually connected.

[0083] Since each component can be simply combined or disassembled by the first lateral coupling member (10), the second lateral coupling member (20), and the front-rear coupling member (30), the recloser actuator (1) according to one embodiment has the advantage of being easy to produce and maintain.

[0084] The control unit controls the current flowing in the first coil portion (110) and the second coil portion (210). By controlling the current flowing in the first coil portion (110) and the second coil portion (210), the direction of the magnetic force applied to the first plunger (120) and the second plunger (220) can be controlled.

[0085] Fig. 5 is a diagram for explaining the pulse operation mode of a control unit according to one embodiment of the present invention. Fig. 6 is a diagram for explaining the standard operation mode of a control unit according to one embodiment of the present invention.

[0086] For convenience of explanation, in FIGS. 5 and 6, adjusting the current direction of the first coil part so that the first magnetic block part applies a forward-acting magnetic force to the first plunger is denoted as 'first open coil ON', adjusting the current direction of the first coil part so that the first magnetic block part applies a backward-acting magnetic force to the first plunger is denoted as 'first closed coil ON', adjusting the current direction of the second coil part so that the second magnetic block part applies a forward-acting magnetic force to the second plunger is denoted as 'second open coil ON', and adjusting the current direction of the first coil part so that the second magnetic block part applies a backward-acting magnetic force to the second plunger is denoted as 'second closed coil ON'.

[0087] Referring to FIGS. 5 and 6, the control unit selectively performs control of one mode among at least one mode including the pulse operation mode. For example, the control unit selectively performs control of one mode among the pulse operation mode and the standard mode.

[0088] Referring to Fig. 5, control of the pulse operation mode here means sequentially performing the controls (a) to (e) below.

[0089] Control of the pulse operation mode is initiated by the control unit (a) adjusting the current of the first coil portion (110) and the second coil portion (210) so that the first plunger (120) moves rearward and the second plunger (220) moves forward. Accordingly, the movable rod portion (300) coupled to the first plunger (120) is placed rearward of the closed position, i.e., in the open position. Specifically, in (a), the first plunger (120) moves rearward and contacts the first lower magnetic block (600) by the force of the first elastic member (160), and the second plunger (220) moves forward to compress the second elastic member (260) and control the first coil portion (110) and the second coil portion (120) so that it makes magnetic contact with the second inner magnetic block (233).

[0090] Thereafter, (b) the current direction of the first coil portion (110) is adjusted so that the first plunger (120) moves forward. Accordingly, the first plunger (110) moves forward, contracts the first elastic member (160), and comes into magnetic contact with the first inner magnetic block (133) and maintains the contact position. As a result, the movable rod portion (300) coupled to the first plunger (120) is placed in the closed position.

[0091] Afterwards, (c) the current direction of the second coil part (210) is adjusted so that the second plunger (220) moves backward.

[0092] Thereafter, (d) according to (c) above (as a result of (c) above), the movable rod part (300) moves rearward. Specifically, as the second plunger (220) moves rearward, the pressing part (310) of the movable rod part (300) is pressed rearward by the electromagnetic force applied rearward to the second plunger (200) and the elastic force of the second elastic member (260). Accordingly, the first plunger (120) coupled to the movable rod part (300) is released from magnetic contact with the first inner magnetic block (133) and moves rearward by the elastic force of the first elastic member (160) to contact the first lower magnetic block part (600), and the movable rod part (300) is placed in the open position. As a result of (c), the second operating unit (200) presses the movable rod unit (300), so that the movable rod unit (300) can move from the closed position to the open position in a pulse motion form. According to the recloser operating unit (1) according to one embodiment, control from the time point of starting step (b) to the time point of ending step (d) can be performed in just 3 to 8 ms.

[0093] Thereafter, (e) the control unit adjusts the current flowing in the second coil unit (210) so that the second plunger (220) moves forward and makes magnetic contact with the second magnetic block unit (250). Accordingly, the second plunger (220) moves forward and is placed at the same position as the position under the control of (a). That is, it is placed at the original position for repeated execution of the pulse operation, so that the control unit can quickly reintroduce the control of (a) to (e).

[0094] Referring to Fig. 6, the control in the standard mode is to sequentially perform the controls (f) to (h) below while supplying current to the first coil section (110) so that the first magnetic block (150) applies a magnetic force acting backward to the first plunger (120).

[0095] Control in standard mode is initiated by (f) adjusting the current direction of the first coil section (110) so that the first plunger moves rearward. Here, the first plunger (120) is in contact with the first lower magnetic block (600), and the movable rod section (300) coupled to the first plunger (120) is placed in the open position.

[0096] Thereafter, (g) the first plunger (120) moves forward and adjusts the current direction of the first coil portion (110) so that it makes magnetic contact with the first magnetic block portion. Here, the movable rod portion (300) is also placed in the closed position. Specifically, in (g), the current direction of the first coil portion (110) is adjusted so that the first plunger (120) maintains the magnetic contact state with the first inner magnetic block (133) for a predetermined period of time while contracting the first elastic member (160).

[0097] Thereafter, (h) the current direction of the first coil portion (110) is adjusted so that the first plunger (120) moves backward. Accordingly, the movable rod portion (300) coupled to the first plunger (120) is placed in the open position again. In the standard mode, the control portion maintains the second plunger (220) of the second operating portion (200) to be placed forward and drives only the first operating portion (100) to perform the operation duty of the recloser actuator (1), which corresponds to the operation duty control of a typical recloser actuator.

[0098] The above description is merely an example of the technical idea of ​​the present embodiment, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of ​​the present embodiment, but rather to explain it, and the scope of the technical idea of ​​the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of rights of the present embodiment.

Claims

1. A first operating unit including a first coil portion, a first plunger disposed inside the first coil portion and having a first through hole extending in the front-back direction, and a first magnetic block portion that applies a magnetic force to the first plunger in a direction corresponding to a current flowing in the first coil portion; A second operating unit comprising a second coil portion, a second plunger disposed inside the second coil portion and having a second through hole extending in the front-back direction, a second elastic member that presses the second plunger backward, and a second magnetic block portion that applies a magnetic force to the second plunger in a direction corresponding to a current flowing in the second coil portion, and is disposed in front of the first operating unit; A movable rod portion having a movable rod and a pressure portion protruding in the radial direction of the movable rod, coupled with the first plunger, movable in the forward and backward direction with respect to the second plunger, and arranged such that at least a portion thereof penetrates the first through hole and the second through hole; and It includes a control unit that controls the current flowing in the first coil unit and the second coil unit, The above pressurized part, A recloser actuator for pulse operation, arranged at the rear of the second plunger, wherein at least a portion of the operating range of the pressurizing portion overlaps with at least a portion of the operating range of the second plunger.

2. In paragraph 1, The above first operating unit is, A recloser actuator for pulse operation, further comprising a first elastic member that presses the first plunger backward.

3. In paragraph 1, The above first magnetic block part, A recloser actuator for pulse operation, comprising a first upper magnetic block disposed between the second operating unit and the first plunger.

4. In paragraph 1, The above first magnetic block part, It includes a first side magnetic block arranged on the outer side of the first plunger, The above lateral direction is, A recloser actuator for pulse operation, the direction being perpendicular to the forward and backward direction.

5. In paragraph 1, The above second magnetic block part, A recloser actuator for pulse operation, comprising a second upper magnetic block arranged in front of the second plunger.

6. In paragraph 5, The above second operating unit is, A recloser actuator for pulse operation, further comprising a second non-magnetic spacer coupled to the bottom surface of the second plunger.

7. In paragraph 1, The above second magnetic block part, It includes a second side magnetic block arranged on the outer side of the second plunger, The above lateral direction is, A recloser actuator for pulse operation, the direction being perpendicular to the forward and backward direction.

8. In paragraph 1, The above control unit, Selectively performs control of any one mode among at least one mode including a pulse operation mode, Here, the control of the pulse operation mode is sequentially, (a) Adjusting the current of the first coil portion and the second coil portion so that the first plunger moves backward and the second plunger moves forward; (b) Adjusting the current of the first coil section so that the first plunger moves forward; (c) Adjusting the current of the second coil section so that the second plunger moves backward; (d) The movable load part moves the current backwards according to (c) above, (e) A recloser actuator for pulse operation, which controls the current of the second coil section so that the second plunger moves forward and makes magnetic contact with the second magnetic block section.

9. In paragraph 8, The above control unit, A recloser actuator for pulse operation, which performs control for 3 to 8 ms from the time point at which the control of (b) above is started to the time point at which the control of (d) above is ended.

10. In paragraph 8, The above control unit, Selectively performs control of one of a plurality of modes including the above pulse operation mode and standard mode, The control of the above standard mode is a state in which a current is applied to the first coil section so that the first magnetic block section applies a magnetic force acting backward to the first plunger. (f) Adjusting the current of the first coil section so that the first plunger moves backward; (g) Adjusting the current of the first coil section so that the first plunger moves forward and makes magnetic contact with the first magnetic block section; (h) A recloser actuator for pulse operation, which controls the current direction of the first coil section so that the first plunger moves backward.

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