Quick response release

Abstract

The utility model relates to a quick response release which comprises a framework, a magnet yoke, a static iron core, a magnet, a coil and a driving module are arranged on the framework, the static iron core is connected with the magnet, a movable iron core is arranged in the coil, the coil generates an electric field to drive the movable iron core to move, and a push rod is arranged at one end of the movable iron core. The driving module at least comprises a first driving circuit and a second driving circuit, the first driving circuit and the second driving circuit are both electrically connected with the coil, the driving module receives a first driving signal, the first driving circuit provides forward electric energy for the coil, and the movable iron core and the static iron core are attracted; the driving module receives a second driving signal, a second driving circuit provides reverse electric energy for the coil, and the movable iron core is separated from the static iron core. According to the utility model, switching-on or switching-off requirements are realized through switching of the first driving circuit and the second driving circuit, thrust is provided for the movable iron core through the magnetic field generated by the coil and the spring at the same time, the switching-off speed can be improved, the switching-off time can be reduced, and the high requirement of rapid switching-off can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field especially relates to a quick response trip unit. BACKGROUND

[0002] In the traditional power system, the trip unit as an important part of the circuit breaker undertakes the key task of quickly cutting off the circuit under abnormal circuit conditions to protect equipment and personal safety. The trip unit in the prior art mainly controls the power supply and controls the power-on and power-off of the coil through a series of sampling and analysis processes, thereby realizing the attraction and tripping action of the trip unit.

[0003] However, this traditional method is limited by the sampling time and the response time of the electromagnetic system structure of the trip unit itself. Specifically, from detecting the abnormal circuit to the actual tripping action of the trip unit, a certain time delay is needed. Due to these technical limitations, the trip unit products on the market can generally only achieve a tripping time of about 30 milliseconds (ms). With the increasing demand for fast response capability of the power system, especially in scenarios that require fast tripping to protect sensitive electronic equipment and prevent short circuit accidents from spreading, the 30ms response time is too long and cannot meet the use requirements of the client.

[0004] Therefore, a quick response trip unit that can meet the high requirements of the client's circuit breaker fast tripping and further improve the overall use safety and reliability of the circuit breaker is needed. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a quick response trip unit.

[0006] The utility model technical scheme is as follows:

[0007] A quick response trip unit, comprising a framework, a magnetic yoke, a static core, a magnet, a coil and a drive module are arranged on the framework, the static core is connected with the magnet, a dynamic core is arranged inside the coil, the coil generates an electric field to drive the dynamic core to move, one end of the dynamic core is provided with a push rod, the drive module at least includes a first drive circuit and a second drive circuit, the first drive circuit and the second drive circuit are electrically connected with the coil, the drive module receives a first drive signal, the first drive circuit provides positive electric energy to the coil, and the dynamic core is attracted to the static core;The drive module receives a second drive signal, the second drive circuit provides reverse electric energy to the coil, and the dynamic core is separated from the static core.

[0008] As a further improvement of the utility model, the driving module further includes energy supply end, rectifier circuit, power supply circuit connected in sequence, the power supply circuit is connected with the first driving circuit, the second driving circuit respectively.

[0009] As a further improvement of the utility model, the power supply circuit includes isolation power supply circuit, linear power supply circuit, voltage stabilizing circuit, the isolation power supply circuit is arranged between the rectifier circuit and the second driving circuit, the linear power supply circuit, the voltage stabilizing circuit are arranged between the rectifier circuit and the first driving circuit.

[0010] As a further improvement of the utility model, the first driving circuit includes controller connected with the voltage stabilizing circuit, driving chip connected with the controller, transistor with gate connected with the driving chip, the first end of the transistor is connected with the second end of the coil, the second end of the transistor is connected with the first ground wire, the first end of the coil is connected with the output end of the rectifier circuit.

[0011] As a further improvement of the utility model, the controller is single-chip microcomputer, the input end of the single-chip microcomputer is connected with the output end of the rectifier circuit, and the output end of the single-chip microcomputer is connected with the driving chip.

[0012] As a further improvement of the utility model, the input end of the single-chip microcomputer is connected with the output end of the rectifier circuit, and the input end of the single-chip microcomputer is connected with the output end of the rectifier circuit.

[0013] As a further improvement of the utility model, the isolation power supply circuit and the second driving circuit are provided with switch K1, the switch K1 includes first contact, second contact, third contact, the first contact is connected with the second driving circuit, the second contact is connected with the isolation power supply circuit, and the third contact is suspended.

[0014] As a further improvement of the utility model, the second driving circuit includes energy storage capacitor C1 connected with the isolation power supply circuit, the positive pole of the energy storage capacitor C1 is connected with the second end of the coil, the negative pole of the energy storage capacitor C1 is connected with the first end of the coil and is connected with the second ground wire, the positive output end of the isolation power supply circuit is connected with the midpoint of the energy storage capacitor C1 and the second contact, and the second end of the coil is connected with the first contact.

[0015] As a further improvement of the utility model, the rectifier circuit and the power supply circuit are provided with diode, and the power supply circuit and the driving circuit are provided with diode.

[0016] As a further improvement of the utility model, the spring is arranged between the moving iron core and the static iron core.

[0017] According to the utility model of the above-mentioned scheme, the utility model has the beneficial effects that:

[0018] 1、 the utility model provides positive direction electric energy to the coil through the first drive circuit when needing to close, provides reverse electric energy to the coil through the second drive circuit when needing to open, and realizes the demand of closing or opening through the switching of the first drive circuit and the second drive circuit;

[0019] 2、 the utility model provides the thrust to the moving iron core through the magnetic field generated by the coil and the spring simultaneously, can improve the speed of opening, reduces the opening time, satisfies the high requirement of the client circuit breaker fast opening, improves the overall use safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the utility model;

[0021] Figure 2 It is the structural schematic diagram of the drive module of the utility model;

[0022] Figure 3 It is the structural schematic diagram of the linear power supply circuit and the voltage stabilizing circuit of the utility model;

[0023] Figure 4 It is the structural schematic diagram of the first drive circuit of the utility model.

[0024] In the drawing: 1, framework;2, magnetic yoke;3, static iron core;4, magnet;5, coil;6, moving iron core;7, push rod;8, spring. DETAILED DESCRIPTION

[0025] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it needs to explain, unless otherwise explicitly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0028] Referring to Figure 1 The utility model provides a kind of quick response release, including framework 1, magnetic yoke 2 is equipped on framework 1, static iron core 3, magnet 4, coil 5 and drive module, static iron core 3 is connected with magnet 4, coil 5 is equipped with dynamic iron core 6 inside, coil 5 generates electric field and drives dynamic iron core 6 to move, one end of dynamic iron core 6 is equipped with push rod 7, drive module at least includes first drive circuit, second drive circuit, first drive circuit and second drive circuit are electrically connected with coil 5, drive module receives first drive signal, first drive circuit provides positive electric energy to coil 5, dynamic iron core 6 and static iron core 3 attract;Drive module receives second drive signal, second drive circuit provides reverse electric energy to coil 5, dynamic iron core 6 and static iron core 3 separate, i.e. when needing to close, drive module provides positive electric energy to coil 5, so that coil 5 generates positive magnetic field and drives dynamic iron core 6 and static iron core 3 attract, when needing to open, drive module provides reverse electric energy to coil 5, so that coil 5 generates reverse magnetic field and drives dynamic iron core 6 and static iron core 3 separate, the demand of closing or opening is realized by switching first drive circuit and second drive circuit, preferably, spring 8 is equipped between dynamic iron core 6 and static iron core 3, the utility model provides thrust to dynamic iron core 6 by the magnetic field generated by coil 5 and spring 8 simultaneously, can improve the speed of opening, reduce opening time, meet the high requirement of client circuit breaker fast opening, improve overall use safety and reliability.

[0029] Referring to Figure 2-4, as an embodiment of the utility model, the drive module still includes the energy supply end, the rectifier circuit, the power supply circuit that connect in proper order, the power supply circuit is electrically connected with first drive circuit, second drive circuit respectively, the rectifier circuit will be provided with alternating current BR+ of energy supply end into direct current, the power supply circuit will convert direct current BR+ that rectifier circuit output into direct current of suitable voltage according to the demand of back end first drive circuit, second drive circuit.

[0030] As an embodiment of the utility model, the power supply circuit includes isolation power supply circuit, linear power supply circuit, voltage stabilizing circuit, wherein, isolation power supply circuit provides +24V voltage, linear power supply circuit provides +12V voltage, voltage stabilizing circuit provides +5V voltage, of course, can adjust the voltage value provided by isolation power supply circuit, linear power supply circuit and voltage stabilizing circuit according to the specific use demand, isolation power supply circuit is arranged between rectifier circuit and second drive circuit, namely isolation power supply circuit provides +24V voltage to second drive circuit;Linear power supply circuit, voltage stabilizing circuit are arranged between rectifier circuit and first drive circuit, namely linear power supply circuit provides +12V voltage to first drive circuit, voltage stabilizing circuit provides +5V voltage to first drive circuit.

[0031] As an embodiment of the utility model, the first driving circuit includes a controller electrically connected with the voltage stabilizing circuit, a driving chip electrically connected with the controller, and a transistor with a gate electrically connected with the driving chip, preferably, the output end of the voltage stabilizing circuit is provided with a voltage stabilizing capacitor, which can ensure the voltage output by the voltage stabilizing circuit to the controller to be stable, avoid unnecessary damage to the controller caused by voltage fluctuation, improve the use safety, the first end of the transistor is electrically connected with the second end of the coil 5, the second end of the transistor is connected with the first ground wire, the first end of the coil 5 is electrically connected with the output end of the rectifier circuit, preferably, the controller is a single-chip microcomputer, the input end of the single-chip microcomputer is electrically connected with the output end of the rectifier circuit, the output end of the single-chip microcomputer is electrically connected with the driving chip, the voltage stabilizing circuit provides +5V voltage to the single-chip microcomputer to drive the single-chip microcomputer to work, the linear power supply circuit provides +12V voltage to the driving chip to drive the driving chip to work, the direct current BR+ output by the rectifier circuit delivers an AD control signal to the input end of the single-chip microcomputer, the AD control signal is a first driving signal, after receiving the AD control signal, the single-chip microcomputer immediately outputs a driving signal Signal to the driving chip, after receiving the driving signal Signal, the driving chip outputs a control signal to the transistor and controls the transistor to be turned on, so that the second end of the coil 5 is connected with the first ground wire, at this time, the first end of the coil 5 is connected with the BR+ voltage, the second end of the coil 5 is connected with the ground, that is, the coil 5 is electrified, the coil 5 generates a forward magnetic field, the moving iron core 6 moves to the direction close to the static iron core 3 and is attached to the static iron core 3, and the closing is realized, preferably, the driving signal Signal is a single signal, the duration of the single signal can be adjusted according to the specific use requirement, for example, taking the duration of the single signal as a pulse, that is, after receiving the AD control signal, the single-chip microcomputer only outputs a pulse driving signal Signal, and then no longer outputs, so that the transistor is turned on only in the time of a pulse, and the coil 5 is electrified and provides a forward magnetic field only in the time of a pulse, of course, the duration of the single signal can ensure that the moving iron core 6 is attached to the static iron core 3, and the closing is realized smoothly, that is, after the closing is completed, the transistor is turned off, the coil 5 is no longer electrified and provides a magnetic field, and the moving iron core 6 remains in the attracted state under the attraction of the magnet 4.

[0032] As an embodiment of the utility model, the input end of the single-chip microcomputer and the output end of the rectifier circuit are connected in series with a first resistor R1 and a second resistor R2, the midpoint of the first resistor R1 and the second resistor R2 is electrically connected with the first end of a third resistor R3, the second end of the third resistor R3 is connected with the first ground wire, through the cooperation of the first resistor R1, the second resistor R2 and the third resistor R3, the voltage of the high potential can be effectively divided and limited, of course, the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3 can be adjusted according to the specific use requirement, so that the single-chip microcomputer can receive a suitable AD control signal, ensure the normal work of the first control circuit, and improve the overall stability and reliability.

[0033] As an embodiment of the utility model, the switch K1 is arranged between the isolation power supply circuit and the second drive circuit, the switch K1 includes the first contact, the second contact and the third contact, the first contact is electrically connected with the second drive circuit, the second contact is electrically connected with the isolation power supply circuit, and the third contact is suspended, the switch of the first contact and the third contact of switch K1 is switched to realize the conduction or the turn-off of the second drive circuit, which is convenient for switching operation and maintenance, can effectively improve the work efficiency, and saves the cost.

[0034] As an embodiment of the utility model, the second drive circuit includes the energy storage capacitor C1 electrically connected with the isolation power supply circuit, the positive pole of the energy storage capacitor C1 is electrically connected with the second end of the coil 5, the negative pole of the energy storage capacitor C1 is electrically connected with the first end of the coil 5 and the second ground wire, the positive output end of the isolation power supply circuit is electrically connected with the midpoint of the energy storage capacitor C1 and the second contact, the second end of the coil 5 is electrically connected with the first contact, when the switch K1 is closed, the contact 1 and the contact 2 of switch K1 are disconnected, the contact 2 and the contact 3 are connected, the isolation power supply circuit provides +24V voltage to charge the energy storage capacitor C1, when the switch K1 is opened, the contact 1 and the contact 2 of switch K1 are connected, the contact 2 and the contact 3 are disconnected, this is the second drive signal, the energy storage capacitor C1 discharges to provide voltage to the second end of the coil 5, at this time, the first end of the coil 5 is connected with the second ground wire, the second end of the coil 5 is connected with +24V voltage and the voltage released by the energy storage capacitor C1, that is, the coil 5 is powered on, the coil 5 generates a reverse magnetic field, drives the moving iron core 6 to move away from the static iron core 3, the moving iron core 6 is separated from the static iron core 3 under the double actions of the reverse magnetic field and the reset force of the spring 8, realizes the opening, effectively shortens the opening time and realizes the quick tripping.

[0035] As an embodiment of the utility model, the diode is arranged between the rectifier circuit and the power supply circuit, and the diode is arranged between the power supply circuit and the drive circuit, by arranging the diode between the circuits, the unidirectional conduction of the diode can ensure the unidirectional conduction of the current, effectively avoids the current of the rear-end circuit flowing to the front-end circuit, and improves the overall work stability and safety.

[0036] In summary, the utility model provides a kind of quick response release, the magnetic field generated by coil 5 and spring 8 are simultaneously provided with thrust to moving iron core 6, can improve the speed of break, reduce break time, meet the high requirement of client circuit breaker quick break, improve overall use safety and reliability;When break is needed, first drive circuit is provided with positive power to coil 5, when break is needed, second drive circuit is provided with reverse power to coil 5, the requirement of break or break is realized by the switching of first drive circuit and second drive circuit;The output end of voltage stabilizing circuit is equipped with voltage stabilizing capacitor, can guarantee the voltage stabilization that voltage stabilizing circuit exports to controller, avoid unnecessary damage of controller due to voltage fluctuation, improve use safety;The cooperation of first resistance R1, second resistance R2, third resistance R3 can effectively divide voltage and limit current of high potential, so that single-chip microcomputer can receive suitable AD control signal, guarantee the normal work of first control circuit, improve overall stability and reliability;Moving iron core 6 separates from static iron core 3 under the dual action of reverse magnetic field and spring 8 reset force, realizes break, effectively shortens break time, realizes quick release;The unidirectional conductivity of diode can guarantee the unidirectional flow of current, effectively avoid the current flow of rear-end circuit to front-end circuit, improve overall working stability and safety.

[0037] It should be emphasized that: the above is only the preferred embodiment of the utility model, not any form of the utility model, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical scheme of the utility model.

Claims

1. A fast acting trip unit characterized by, The application relates to a magnetic drive module, which comprises a skeleton (1), a magnetic yoke (2), a static iron core (3), a magnet (4), a coil (5) and a driving module, the static iron core (3) is connected with the magnet (4), the coil (5) is internally provided with a dynamic iron core (6), the coil (5) generates an electric field to drive the dynamic iron core (6) to move, one end of the dynamic iron core (6) is provided with a push rod (7), the driving module at least comprises a first driving circuit and a second driving circuit, the first driving circuit and the second driving circuit are electrically connected with the coil (5), the driving module receives a first driving signal, the first driving circuit provides positive electric energy to the coil (5), and the dynamic iron core (6) is attracted to the static iron core (3); the driving module receives a second driving signal, the second driving circuit provides reverse electric energy to the coil (5), and the dynamic iron core (6) is separated from the static iron core (3).

2. The quick response trip unit of claim 1, wherein, The driving module further comprises an energy supply end, a rectifier circuit and a power supply circuit which are connected in sequence, and the power supply circuit is electrically connected with the first driving circuit and the second driving circuit.

3. The quick response trip unit of claim 2 wherein, The power supply circuit comprises an isolation power supply circuit, a linear power supply circuit and a voltage stabilizing circuit, the isolation power supply circuit is arranged between the rectifier circuit and the second driving circuit, and the linear power supply circuit and the voltage stabilizing circuit are arranged between the rectifier circuit and the first driving circuit.

4. The quick response trip unit of claim 3 wherein, The first driving circuit comprises a controller which is electrically connected with the voltage stabilizing circuit, a driving chip which is electrically connected with the controller, and a transistor whose gate is electrically connected with the driving chip, a first end of the transistor is electrically connected with a second end of the coil (5), a second end of the transistor is connected with a first ground wire, and a first end of the coil (5) is electrically connected with an output end of the rectifier circuit.

5. The quick response trip unit of claim 4 wherein, The controller is a single-chip microcomputer, an input end of the single-chip microcomputer is electrically connected with the output end of the rectifier circuit, and an output end of the single-chip microcomputer is electrically connected with the driving chip.

6. The quick response trip unit of claim 5 wherein, A first resistor R1 and a second resistor R2 are connected in series between the input end of the single-chip microcomputer and the output end of the rectifier circuit, a first end of a third resistor R3 is electrically connected with a midpoint of the first resistor R1 and the second resistor R2, and a second end of the third resistor R3 is connected with the first ground wire.

7. The quick response trip unit of claim 3 wherein, A switch K1 is arranged between the isolation power supply circuit and the second driving circuit, the switch K1 comprises a first contact, a second contact and a third contact, the first contact is electrically connected with the second driving circuit, the second contact is electrically connected with the isolation power supply circuit, and the third contact is suspended.

8. The quick response trip unit of claim 7 wherein, The second driving circuit comprises an energy storage capacitor C1 which is electrically connected with the isolation power supply circuit, a positive pole of the energy storage capacitor C1 is electrically connected with the second end of the coil (5), a negative pole of the energy storage capacitor C1 is electrically connected with the first end of the coil (5) and connected with a second ground wire, a positive output end of the isolation power supply circuit is electrically connected with a midpoint of the energy storage capacitor C1 and the second contact, and the second end of the coil (5) is electrically connected with the first contact.

9. The quick response trip unit of claim 2 wherein, A diode is arranged between the rectifier circuit and the power supply circuit, and a diode is arranged between the power supply circuit and the drive circuit.

10. The fast acting trip unit of claim 1, wherein, A spring (8) is arranged between the moving iron core (6) and the static iron core (3).

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