Device for controlling opening and closing of circuit breaker and circuit breaker

Abstract

The utility model provides a device for controlling opening and closing of a circuit breaker and the circuit breaker. The utility model provides a device for controlling opening and closing of a circuit breaker. The device comprises an isolation power supply circuit, an auxiliary switch circuit and a controller, wherein the input end of the isolation power supply circuit is connected with an external voltage source, and the output end of the isolation power supply circuit is connected with the power supply access end of the auxiliary switch circuit; the isolation power supply circuit is used for supplying power to the auxiliary switch circuit; the output end of the auxiliary switch circuit is connected with the controller; the auxiliary switch circuit is used for receiving an opening and closing control signal through a signal input end and outputting the opening and closing control signal to the controller; and the controller is used for performing switching-on and switching-off control on the circuit breaker according to the switching-on and switching-off control signal. According to the device for controlling opening and closing of the circuit breaker and the circuit breaker provided by the invention, the safety of opening and closing control can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of power control, and in particular to a device for controlling the opening and closing of a circuit breaker and a circuit breaker. Background Art

[0002] Circuit breakers play a vital role in the electrical industry, occupying a core position in the distribution of electrical energy generated by power generation equipment. According to statistics, more than 80% of electrical energy is distributed and used through circuit breakers. Among circuit breakers, fee-controlled circuit breakers are widely used in various fields such as residential, commercial places and industrial production. Their main task is to accurately control and effectively protect various electrical equipment.

[0003] In practical applications, fee-controlled circuit breakers play a key role. By achieving precise power control, they can effectively reduce energy consumption and provide users with reliable power control and economical power solutions. With the function of automatic opening and closing, they can more intelligently adapt to the power demand of different scenarios, improve the efficiency of power utilization, and create a more intelligent, convenient and economical power management experience for users.

[0004] In recent years, fee-controlled circuit breakers often use the live wire control of the meter to achieve opening and closing control. In this way, during the opening and closing process, if there is a problem with the meter or its connecting lines, it may cause circuit abnormality and bring safety hazards. Utility Model Content

[0005] In view of this, the present application provides a device for controlling the opening and closing of a circuit breaker and a circuit breaker, so as to improve the safety of the opening and closing control of the circuit breaker.

[0006] Specifically, the present application is implemented through the following technical solutions:

[0007] In a first aspect, the present application provides a device for controlling the opening and closing of a circuit breaker, the device comprising an isolation power supply circuit, an auxiliary switch circuit and a controller; wherein:

[0008] The input end of the isolated power supply circuit is connected to an external voltage source, and the output end of the isolated power supply circuit is connected to a power supply access end of the auxiliary switch circuit; the isolated power supply circuit is used to supply power to the auxiliary switch circuit;

[0009] The output end of the auxiliary switch circuit is connected to the controller; the auxiliary switch circuit is used to receive the opening and closing control signal through the signal input end, and output the opening and closing control signal to the controller;

[0010] The controller is used to perform opening and closing control of the circuit breaker according to the opening and closing control signal.

[0011] A second aspect of the present application provides a circuit breaker, the circuit breaker comprising any device for controlling the opening and closing of a circuit breaker provided in the first aspect of the present application.

[0012] The device for controlling the opening and closing of a circuit breaker provided by the present application is provided with an isolated power supply circuit, an auxiliary switch circuit and a controller, and the input end of the isolated power supply circuit is connected to an external voltage source, and the output end of the isolated power supply circuit is connected to the power supply access end of the auxiliary switch circuit, so that the isolated power supply circuit supplies power to the auxiliary switch circuit, and then the output end of the auxiliary switch circuit is connected to the controller, and the auxiliary switch circuit receives the opening and closing control information through the signal input end, and outputs the opening and closing control signal to the controller, so that the controller can perform opening and closing control on the circuit breaker based on the opening and closing control signal. In this way, through the auxiliary switch circuit, the opening and closing control can be realized based on the opening and closing control signal from the remote end, and because the auxiliary switch circuit has the characteristics of high anti-interference, long-distance transmission, and power safety, the safety of the opening and closing control can be improved. In addition, the opening and closing control can also be performed remotely. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of a first embodiment of a device for controlling the opening and closing of a circuit breaker provided in the present application;

[0014] Figure 2 A schematic diagram of a second embodiment of a device for controlling the opening and closing of a circuit breaker provided in the present application;

[0015] Figure 3 A schematic diagram of a micro switch according to an exemplary embodiment of the present application;

[0016] Figure 4 A schematic diagram of an isolated power supply circuit shown as an exemplary embodiment of the present application;

[0017] Figure 5 A schematic diagram of an isolated power supply circuit shown in another exemplary embodiment of the present application;

[0018] Figure 6 A schematic diagram of an isolated power supply circuit shown in yet another exemplary embodiment of the present application;

[0019] Figure 7 A schematic diagram of an auxiliary switch circuit according to an exemplary embodiment of the present application;

[0020] Figure 8 This is a schematic diagram of an auxiliary switch circuit according to another exemplary embodiment of the present application.

[0021] Description of reference numerals:

[0022] 1: Isolate the power circuit;

[0023] 2: Auxiliary switch circuit;

[0024] 3: Controller;

[0025] 4: Micro switch;

[0026] 11: Input terminal of the isolated power supply circuit;

[0027] 12: Output end of the isolated power supply circuit;

[0028] 21: Power supply access terminal of auxiliary switch circuit;

[0029] 22: Output terminal of auxiliary switch circuit;

[0030] 23: Signal input terminal of auxiliary switch circuit;

[0031] 110: a first filtering circuit;

[0032] 120: power module;

[0033] 130: a second filtering circuit;

[0034] 140: Interference suppression circuit;

[0035] 150: start-stop control circuit;

[0036] C1: first capacitor;

[0037] C2: second capacitor;

[0038] C3: the third capacitor;

[0039] C4: fourth capacitor;

[0040] C5: fifth capacitor;

[0041] R1: first resistor;

[0042] R2: second resistor;

[0043] R3: the third resistor;

[0044] R4: the fourth resistor;

[0045] R5: the fifth resistor;

[0046] R6: the sixth resistor;

[0047] L1: first inductor;

[0048] Q1: transistor;

[0049] M1: MOS tube;

[0050] D1: diode;

[0051] 1201: switching power supply chip;

[0052] 1202: Transformer;

[0053] UI: Optocoupler;

[0054] 210: Surge protection circuit;

[0055] 211: Transient voltage suppressor diode;

[0056] 212: Positive temperature coefficient thermistor;

[0057] 213: switch device;

[0058] 214: Solid state discharge tube:

[0059] Vin+: positive input terminal of the power module;

[0060] Vin-: negative input terminal of the power module;

[0061] out+: the positive output terminal of the power module;

[0062] out-: Negative output terminal of the power module. DETAILED DESCRIPTION

[0063] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0064] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0065] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0066] In view of this, the present application provides a device for controlling the opening and closing of a circuit breaker and a circuit breaker, so as to improve the safety of the opening and closing control of the circuit breaker.

[0067] The device for controlling the opening and closing of a circuit breaker provided by the present application is provided with an isolated power supply circuit, an auxiliary switch circuit and a controller, and the input end of the isolated power supply circuit is connected to an external voltage source, and the output end of the isolated power supply circuit is connected to the power supply access end of the auxiliary switch circuit, so that the isolated power supply circuit supplies power to the auxiliary switch circuit, and then the output end of the auxiliary switch circuit is connected to the controller, and the auxiliary switch circuit receives the opening and closing control information through the signal input end, and outputs the opening and closing control signal to the controller, so that the controller can perform opening and closing control on the circuit breaker based on the opening and closing control signal. In this way, through the auxiliary switch circuit, the opening and closing control can be realized based on the opening and closing control signal from the remote end, and because the auxiliary switch circuit has the characteristics of high anti-interference, long-distance transmission, and power safety, the safety of the opening and closing control can be improved. In addition, the opening and closing control can also be performed remotely.

[0068] Specific embodiments are given below to introduce the technical solution of the present application in detail.

[0069] Figure 1 This is a schematic diagram of a first embodiment of a device for controlling the opening and closing of a circuit breaker provided in this application. Figure 1 ,exist Figure 1 In the example shown, the device for controlling the opening and closing of the circuit breaker includes an isolation power supply circuit 1, an auxiliary switch circuit 2 and a controller 3; wherein,

[0070] The input terminal 11 of the isolated power supply circuit 1 is connected to an external voltage source, and the output terminal 12 of the isolated power supply circuit is connected to the power supply access terminal 21 of the auxiliary switch circuit 2; the isolated power supply circuit 1 is used to supply power to the auxiliary switch circuit 2;

[0071] The output end 22 of the auxiliary switch circuit 2 is connected to the controller 3; the auxiliary switch circuit 2 is used to receive the opening and closing control signal through the signal input end 23, and output the opening and closing control signal to the controller 3;

[0072] The controller 3 is used to perform opening and closing control on the circuit breaker according to the opening and closing control signal.

[0073] Specifically, the isolated power supply circuit 1 can disconnect the electrical connection between the input and the output to achieve electrical isolation between the input power supply and the output circuit, thereby improving safety and stability. At the same time, the isolated power supply circuit 1 can reduce the mutual influence between the circuits and reduce the possibility of crosstalk, thereby improving the stability and reliability of the entire device. A specific embodiment will be given below to introduce the specific structure of the isolated power supply circuit in detail, and it will not be repeated in this embodiment.

[0074] Furthermore, the external voltage source is used to provide electrical energy to ensure the normal operation of the device. The specific source of the external voltage source is set according to actual needs, and is not limited in this embodiment. For example, in one embodiment, the external voltage source may be a voltage source from a public power grid. For another example, in another embodiment, in certain special scenarios, the external voltage source may be a backup power supply, an energy storage device, or other voltage sources, so that the device can still maintain basic functions when the public power grid is unavailable or fails.

[0075] Specifically, the opening and closing control signal is used to indicate that the device provided in this embodiment controls the circuit breaker to open or close. It may include an opening control signal and a closing control signal. For example, in a possible implementation, when the opening and closing control signal is at a low level, the opening and closing control signal is an opening control signal, which is used to indicate that the device controls the circuit breaker to open, and when the opening and closing control signal is at a high level, the opening and closing control signal is a closing control signal, which is used to indicate that the device controls the circuit breaker to close.

[0076] It should be noted that the opening and closing control signal can be transmitted by the remote control system to the auxiliary switch circuit 2. For example, in a possible implementation, the remote control system can detect the user's fee usage, and then when it is detected that the user is in arrears, send an opening control signal to the auxiliary switch circuit 2 to control the circuit breaker to open; when it is detected that the user has paid, send a closing control signal to the auxiliary switch circuit 2 to control the circuit breaker to close.

[0077] For further information, please refer to Figure 1 , the controller 3 is used to control the opening and closing of the circuit breaker based on the opening and closing control signal. In specific implementation, the purpose of opening and closing control can be achieved by controlling the circuit breaker to trip or close. For example, when the opening and closing control signal is an opening control signal, the circuit breaker is controlled to trip to achieve the opening of the circuit breaker, and when the opening and closing control signal is a closing control signal, the circuit breaker is controlled to close to achieve the closing of the circuit breaker. It should be noted that when the controller 3 controls the circuit breaker to close (close the circuit breaker), the circuit is turned on; when the controller 3 controls the circuit breaker to open (disconnect the circuit breaker), the circuit is disconnected.

[0078] The device for controlling the opening and closing of a circuit breaker provided in this embodiment is provided with an isolation power supply circuit, an auxiliary switch circuit and a controller, and the input end of the isolation power supply circuit is connected to an external voltage source, and the output end of the isolation power supply circuit is connected to the power supply access end of the auxiliary switch circuit, so that the isolation power supply circuit supplies power to the auxiliary switch circuit, and then the output end of the auxiliary switch circuit is connected to the controller, and the auxiliary switch circuit receives the opening and closing control information through the signal input end, and outputs the opening and closing control signal to the controller, so that the controller can control the opening and closing of the circuit breaker based on the opening and closing control signal. In this way, through the auxiliary switch circuit, the opening and closing control can be realized based on the opening and closing control signal from the remote end, and because the auxiliary switch circuit has the characteristics of high anti-interference, long-distance transmission, and power safety, the safety of the opening and closing control can be improved. In addition, the opening and closing control can also be performed remotely.

[0079] Figure 2 This is a schematic diagram of a second embodiment of a device for controlling the opening and closing of a circuit breaker provided in this application. Figure 2 On the basis of the above embodiment, the device further comprises a micro switch 4, the micro switch 4 is connected to the circuit breaker through mechanical transmission, and the micro switch 4 is electrically connected to the controller 3; wherein,

[0080] The micro switch 4 is used to detect the opening and closing state of the circuit breaker and feed back the detection result to the controller 3;

[0081] The controller 3 is also used to determine the opening and closing state of the circuit breaker according to the detection result fed back by the micro switch 4.

[0082] Optional, Figure 3 This is a schematic diagram of a micro switch according to an exemplary embodiment of the present application. Figure 3 Specifically, the micro switch 4 is connected to the circuit breaker through mechanical transmission. For example, in a possible implementation, the cantilever of the micro switch 4 is connected to the buckle in the circuit breaker through mechanical transmission. When the buckle is in a tripped state, the cantilever of the micro switch 4 is in a released state, and when the buckle is in a closed state, the cantilever of the micro switch 4 is in a pressed state. Please continue to refer to Figure 3 It should be noted that when the cantilever of the microswitch 4 is in a pressed state, the C contact in the microswitch 4 is connected to the NO contact, and the C contact is disconnected from the NC contact; similarly, when the microswitch 4 is in a released state, the C contact in the microswitch 4 is connected to the NC contact, and the C contact is disconnected from the NO contact.

[0083] Please continue to refer to Figure 2The micro switch 4 can be connected to the controller 3 through an optocoupler isolator. In addition, the optocoupler isolator is also connected to the output end of the isolation power supply circuit 1; the isolation power supply circuit 1 can supply power to the optocoupler isolator.

[0084] Please continue to refer to Figure 3 , the micro switch 4 has three contacts, namely, C contact, NO contact and NC contact, wherein the C contact and NC contact are connected to the controller 3 through an optocoupler isolator. Referring to the previous description, the three contacts are controlled by the cantilever to determine whether they are turned on or not. When the cantilever of the micro switch 4 is in a released state, the C contact is disconnected from the NO contact, and the C contact is turned on from the NC contact; when the cantilever of the micro switch 4 is in a pressed state, the C contact is turned on from the NO contact, and the C contact is turned off from the NC contact. In specific implementation, the controller 3 can determine whether the cantilever of the micro switch 4 is in a released state or a pressed state based on whether the C contact and the NC contact are in a conducting state or a disconnected state. Furthermore, based on the state of the cantilever of the micro switch 4, the opening and closing state of the circuit breaker can be determined.

[0085] In combination with the above example, for example, in one embodiment, at a certain moment, the controller 3 determines that the C contact and the NC contact are in the on state, the micro switch 4 is in the released state, and further determines that the circuit breaker is in the open state.

[0086] Optionally, in a possible implementation of the present application, the micro switch 4 is also connected to a remote control system; the micro switch 4 is also used to feed back the detection result to the remote control system. In this way, the remote control system can determine the opening and closing state of the circuit breaker based on the detection result.

[0087] The device for controlling the opening and closing of a circuit breaker provided in this embodiment is provided with a micro switch, and the micro switch is connected to the circuit breaker through mechanical transmission, and the micro switch is electrically connected to the controller. In this way, the opening and closing state of the circuit breaker can be detected based on the micro switch, and the detection result is fed back to the controller, so that the controller can determine the opening and closing state of the circuit breaker based on the detection result. In this way, the controller can accurately determine the state of the circuit breaker based on the micro switch to improve the reliability of the opening and closing control.

[0088] Figure 4 This is a schematic diagram of an isolated power supply circuit according to an exemplary embodiment of the present application. Figure 4 The isolated power supply circuit 1 includes a first filter circuit 110, a power module 120, a second filter circuit 130 and an interference suppression circuit 140; wherein,

[0089] The first filter circuit 110 is connected in parallel between the positive input terminal vin+ and the negative input terminal vin- of the power module 120;

[0090] The second filter circuit 130 is connected in parallel between the positive output terminal out+ and the negative output terminal out- of the power module 120;

[0091] The interference suppression circuit 140 is connected between the negative input terminal vin- and the negative output terminal out-;

[0092] The positive input terminal vin+ constitutes the input terminal of the isolated power supply circuit 1 ; the positive output terminal out+ constitutes the output terminal of the isolated power supply circuit 1 .

[0093] For specific implementation, please refer to Figure 4 In a possible implementation, the first filter circuit 110 includes a first inductor L1, a second capacitor C2 and a third capacitor C3; wherein,

[0094] The first end of the first inductor L1 is connected to the first end of the second capacitor C2, and the other end of the first inductor L1 is connected to the first end of the third capacitor C3 and then connected to the positive input vin+ of the power module 120;

[0095] The second end of the second capacitor C2 is connected to the second end of the third capacitor C3 and then connected to the negative input terminal vin- of the power module 120 .

[0096] Specifically, the first filter circuit 110 serves as an input filter, and is mainly used to remove noise, fluctuation and interference in the external voltage source, and ensure the stability and purity of the voltage source input to the positive input terminal.

[0097] Furthermore, the power module 120 is a DC-DC power module, which is used to convert a DC voltage into another DC voltage. Figure 4 The power module 120 comprises a positive input terminal vin+, a negative input terminal vin-, a positive output terminal out+ and a negative output terminal out-. The positive input terminal vin+ constitutes the input terminal of the isolated power supply circuit 1 and is connected to an external voltage source; the positive output terminal vin- constitutes the output terminal of the isolated power supply circuit 1 and is connected to the power supply access terminal of the auxiliary switch circuit 2; and the negative input terminal vin- and the negative output terminal out- are both grounded.

[0098] For further information, please refer to Figure 4 The second filtering circuit 130 includes a fourth capacitor C4, a fifth capacitor C5 and a sixth resistor R6, wherein the first ends of the fourth capacitor C4, the fifth capacitor C5 and the sixth resistor R6 are all connected to the positive output terminal out+, and the second ends of the fourth capacitor C4, the fifth capacitor C5 and the sixth resistor R6 are all connected to the negative output terminal out-.

[0099] For details, see Figure 4 The second filter circuit 130 serves as an output filter, which can suppress high-frequency noise, filter out power supply harmonics, and smooth the output voltage.

[0100] For further information, please refer to Figure 4 In a possible implementation of the present application, the interference suppression circuit 140 may include a discharge circuit and a capacitor, the discharge circuit and the capacitor are connected in parallel, and the discharge circuit is used to discharge the voltage on the capacitor. Figure 4 ,exist Figure 4 In the example shown, the bleeder circuit can be formed by multiple resistors connected in series. Figure 4 By setting an interference suppression circuit connection between the negative input terminal vin- and the negative output terminal out-, common mode noise can be suppressed.

[0101] Optional, Figure 5 This is a schematic diagram of an isolated power supply circuit according to another exemplary embodiment of the present application. Figure 5 , based on the above embodiment, the isolated power supply circuit further includes a start-stop control circuit 150; the start-stop control circuit 150 is arranged between the external voltage source and the positive input terminal vin+, and the control end of the start-stop control circuit 150 is connected to the controller 3; wherein,

[0102] The controller 3 is also used to control the start-stop control circuit 150 to be turned on after a preset time when it is detected that the circuit breaker is powered on;

[0103] The controller 3 is further configured to control the start / stop control circuit 150 to disconnect when it is detected that the circuit breaker is powered off.

[0104] Specifically, the specific duration of the preset duration is set according to actual needs. In this embodiment, the specific duration of the preset duration is not limited. In specific implementation, the specific duration of the preset duration can be set according to the startup duration of the external voltage source. When the startup duration of the external voltage source is long, the specific duration of the preset duration can be relatively longer. For example, in a possible implementation, the preset duration can be 200 milliseconds.

[0105] Further, the controller 3 may transmit a control signal to the start-stop control circuit 150 to control the on and off of the start-stop control circuit 150 through the control signal. For example, in a possible implementation, when the control signal is at a high level, the start-stop control circuit 150 is turned on, and when the control signal is at a low level, the start-stop control circuit 150 is turned off. The controller 3 may achieve the purpose of controlling the on or off of the start-stop control circuit 150 by adjusting the duration of the high level and the low level in the control signal.

[0106] In specific implementation, combined with the above example, for example, when the preset duration is 200 milliseconds, the controller 3 can send a control signal to the start-stop control circuit 150 when it is detected that the circuit breaker is powered on. The control signal is initially at a low level, and the duration of the low level is 200 milliseconds. Further, after 200 milliseconds, the control signal is converted to a high level. Further, after detecting that the circuit breaker is powered off, the control signal is converted to a low level. In this way, the start-stop control circuit 150 can be controlled.

[0107] It should be noted that when the circuit breaker is powered on, the purpose of delayed conduction of the isolation power supply circuit can be achieved by controlling the start-stop control circuit to be turned on after a preset time. In this way, the isolation power supply circuit does not work within the preset time, and its energy consumption is less. In this way, the external voltage source can be started as soon as possible, the startup time of the external voltage source can be shortened, and the problem of the external voltage source starting too slowly can be avoided.

[0108] Furthermore, when the circuit breaker is powered off, the power supply is disconnected by controlling the start-stop control circuit. In this way, after the circuit breaker is powered off, the external voltage source no longer provides power to the isolated power supply circuit, thereby reducing the energy consumption of the external voltage source, so that the external voltage source can supply power to other components in the circuit breaker, thereby avoiding the problem of other components losing power too quickly.

[0109] Optional, Figure 6 This is a schematic diagram of an isolated power supply circuit according to another exemplary embodiment of the present application. Figure 6 In a possible implementation of the present application, the start-stop control circuit 150 includes a first resistor R1, a second resistor R2, a first capacitor C1, a transistor Q1, a third resistor R3, a fourth resistor R4 and a MOS tube M1; wherein,

[0110] The first end of the first resistor R1 constitutes the control end of the start-stop control circuit 150, and the second end of the first resistor R1 is connected to the base of the transistor Q1;

[0111] The first end of the second resistor R2 and the first end of the first capacitor C1 are both connected to the base of the transistor Q1, the second end of the second resistor R2 and the second end of the first capacitor C1 are both connected to the emitter of the transistor Q1, and the emitter is grounded;

[0112] The first end of the third resistor R3 is connected to the collector of the transistor Q1, the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and then connected to the gate of the MOS transistor M1, and the second end of the fourth resistor R4 and the drain of the MOS transistor M1 are both connected to the external voltage source;

[0113] The source of the MOS tube M1 is connected to the positive input terminal vin+.

[0114] Combine the following Figure 6 , briefly introduce the working principle of the start-stop control circuit:

[0115] Specifically, the start-stop control circuit 150 receives a control signal from the controller 3 through the first end of the first resistor R1. For the convenience of explanation, the control signal is recorded as a VDI_SW signal. Figure 6 When the VDI_SW signal is at a high level, the transistor Q1 is turned on. Further, after the transistor Q1 is turned on, the circuit from the external voltage source to the ground through the third resistor R3, the fourth resistor R4, and the transistor Q1 is turned on, and the current flows through the third resistor R3 and the fourth resistor R4. At this time, due to the voltage division effect, the voltage across the fourth resistor R4 increases. At this time, the voltage between the gate and the drain of the MOS tube M1 increases. At this time, the MOS tube M1 is turned on, and the entire start-stop control circuit 150 is turned on.

[0116] Further, when the VDI_SW signal is at a low level, the transistor Q1 is turned off. Accordingly, when the transistor Q1 is turned off, the circuit from the external voltage source through the third resistor R3, the fourth resistor R4, and the transistor Q1 to the ground is in a disconnected state. At this time, the voltage across the fourth resistor R4 is 0. At this time, the voltage between the gate and the drain of the MOS tube M1 is 0, the MOS tube M1 is turned off, and the entire start-stop control circuit 150 is disconnected.

[0117] As described above, the controller 3 can achieve the purpose of controlling the start-stop control circuit 150 to be turned on or off by adjusting the duration of the high level and the low level of the VDI_SW signal.

[0118] Please continue to refer to Figure 6 Optionally, the start-stop control circuit 150 may further include a diode D1, wherein the anode of the diode D1 is connected to the anode input terminal vin+, and the cathode of the diode D1 is connected to the source of the MOS tube M1. In this way, backflow can be prevented by setting a diode.

[0119] The device for controlling the opening and closing of a circuit breaker provided in the present embodiment sets a start-stop control circuit in the isolation power supply circuit, and then when the circuit breaker is powered on, controls the start-stop control circuit to be turned on after a preset time period, so as to prevent the problem of the external voltage source starting too slowly when the circuit breaker is powered on; further, when the circuit breaker is powered off, controls the start-stop control circuit to be disconnected, so as to avoid the problem of other components in the circuit breaker losing power too quickly when the circuit breaker is powered off.

[0120] Optional, please continue to refer to Figure 6 In a possible implementation, the power module 120 includes a switching power chip 1201 and a transformer 1202; wherein,

[0121] The power input terminal of the switching power chip 1201 constitutes the positive input terminal vin+ of the power module 120 , and the ground terminal of the switching power chip 1201 constitutes the negative input terminal vin- of the power module 120 ;

[0122] The power input end of the switching power supply chip 1201 is connected to the main winding on the input side of the transformer 1202, and the first switch end and the second switch end of the switching power supply chip 1201 are respectively connected to the two secondary windings at the input end of the transformer 1202;

[0123] The main winding at the output side of the transformer 1202 constitutes the positive output terminal out+ of the power module 120 , and the two secondary windings at the output end of the transformer 1202 are connected to constitute the negative output terminal out− of the power module 120 .

[0124] It should be noted that the power input terminal of the switching power chip 1201 is Figure 6 The VCC terminal shown in FIG. 1 is the ground terminal of the switching power supply chip 1201. Figure 6 The GND terminal shown, the first switch terminal of the switching power supply chip 1201 is Figure 6 The D1 terminal shown is the second switch terminal of the switching power supply chip 1201. Figure 6 The D2 terminal is shown.

[0125] Furthermore, the main winding on the input side of the transformer 1202 is Figure 6 At the T11 end shown, the two secondary windings at the input end of the transformer 1202 are Figure 6 The T12 and T13 terminals shown in FIG. 1 are respectively the main windings at the output terminal of the transformer 1202 and the Figure 6 The two secondary windings on the output side of the transformer 1202 are shown as T21. Figure 6 The T22 and T23 ends are shown.

[0126] In a specific implementation, the switching power supply chip 1201 can control the on and off of the transformer 1202, and then change the voltage at the input end of the transformer 1202 to achieve the purpose of changing the voltage at its output side, so as to achieve the purpose of DC-DC conversion.

[0127] For further information, see Figure 6 A square wave will be generated between the main winding and the secondary winding on the input side of the transformer 1202. Correspondingly, an induced electromotive force will be generated on the output side of the transformer 1202, and a corresponding voltage will be output.

[0128] Please refer to Figure 6The power module 120 may further include two diodes, which are respectively arranged on two secondary windings on the output side of the transformer 1202, and the two diodes constitute a rectifier circuit.

[0129] The device for controlling the opening and closing of a circuit breaker provided in this embodiment uses a switching power supply chip and a transformer to construct a power supply module, which can reduce costs.

[0130] Figure 7 This is a schematic diagram of an auxiliary switch circuit according to an exemplary embodiment of the present application. Figure 7 On the basis of the above-mentioned embodiment, the device for controlling the opening and closing of a circuit breaker provided in this embodiment, the auxiliary switch circuit 2 may include a fifth resistor R5, a photocoupler U1 and a surge protection circuit 210; wherein,

[0131] A first end of the fifth resistor R5 is connected to the output end of the isolation power supply circuit 1, and a second end of the fifth resistor R5 is connected to the positive electrode of the primary diode of the photocoupler U1;

[0132] The input end of the surge protection circuit 210 is used to receive the opening and closing control signal, and the output end of the surge protection circuit 210 is connected to the cathode of the primary diode of the photocoupler U1;

[0133] The secondary side of the photoelectric coupler U1 is connected to the controller 3 .

[0134] Specifically, the photocoupler U1 can provide electrical isolation between the input and output of the auxiliary switch conversion circuit 2 to improve stability and safety.

[0135] Furthermore, the surge protection circuit 210 is used to protect the device from damage caused by external surges, ensuring that the circuit can still operate stably when facing sudden overvoltage, thereby improving the stability and reliability of the device.

[0136] Please also refer to Figure 1 and Figure 7 The first end of the fifth resistor R5 is the power access end of the auxiliary switch circuit 2, which is connected to the output end of the isolation power supply circuit 1. Further, the collector of the three-way terminal of the secondary side of the optical path isolator U1 is the output end of the auxiliary switch circuit 2, which is connected to the controller 3.

[0137] The device provided in this embodiment can effectively prevent external surges and improve the stability and reliability of the device by providing a surge protection circuit in the auxiliary switch conversion circuit.

[0138] Optional, please continue to refer to Figure 7In a possible implementation, the surge protection circuit 210 includes a transient suppression diode 211, a positive temperature coefficient thermistor 212 and a switch device 213; wherein,

[0139] The positive electrode of the transient suppression diode 211 is connected to the first end of the positive temperature coefficient thermistor 212, and together constitute the output end of the surge protection circuit 210; the negative electrode of the transient suppression diode 211 is connected to the second end of the positive temperature coefficient thermistor 212 through the switch device 213, and the negative electrode of the transient suppression diode 211 is grounded;

[0140] The control end of the switch device 213 constitutes the input end of the surge protection circuit 210, and is used to receive the opening and closing control signal, and to be turned on or off under the control of the opening and closing control signal.

[0141] Specifically, the control end of the switch device 213 is used to receive the opening and closing control signal, and to be turned on or off under the control of the opening and closing control signal. Figure 1 and reference Figure 7 It can be understood that the control end of the switch device 213 is the signal input end of the auxiliary switch circuit 2.

[0142] Combined with the above introduction, for example, in a possible implementation, when the remote control needs to determine that the switch needs to be opened, a switch opening control signal is sent, and the switch device 213 is turned on under the action of the switch opening control signal. At this time, Figure 7 The voltage at DI_O is pulled down, and accordingly, the optocoupler isolator U1 works, and the secondary side of the optocoupler isolator U1 is at a low level (i.e. Figure 7 DI_O1 is low level), at this time, the controller 3 detects the opening and closing control signal, which is low level, that is, it is an opening control signal for controlling the opening. Similarly, when the remote control needs to determine that the closing is required, the closing control signal is sent, and the switch device 213 is disconnected under the action of the closing control signal. At this time, Figure 7 As shown, DI_O is in a floating state, and accordingly, the optocoupler isolator U1 does not work. At this time, the controller 3 detects the opening and closing control signal, and the opening and closing control signal is at a high level, that is, it is a closing control signal for controlling the closing of the switch.

[0143] Please refer to Figure 7 The transient voltage suppression diode 211 is used to provide a low resistance path when a transient voltage or overvoltage occurs in the circuit, and guide the overvoltage to the ground point to protect the photoelectric coupler connected thereto from damage. In this way, the transient voltage suppression diode 211 ensures that the photoelectric coupler works within an acceptable voltage range, thereby improving the reliability of the photoelectric coupler.

[0144] Furthermore, when a continuous high current is input to the input end of the surge protection circuit 210 , the temperature of the positive temperature coefficient thermistor 212 rises and the resistance value increases, thereby reducing the continuous high current and ensuring the stability of the input current, preventing the photocoupler from being damaged under the continuous high current.

[0145] The device for controlling the opening and closing of a circuit breaker provided in this embodiment provides a specific structure of a surge protection circuit. The surge protection circuit can effectively prevent external surges and improve the stability and reliability of the device.

[0146] Furthermore, Figure 8 This is a schematic diagram of an auxiliary switch circuit according to another exemplary embodiment of the present application. Figure 8 ,exist Figure 8 In the example shown, the surge protection circuit 210 further includes a solid discharge tube 214; wherein,

[0147] The positive electrode of the solid discharge tube 214 is connected to the second end of the positive temperature coefficient thermistor 212 , and the negative electrode of the solid discharge tube 214 is connected to the negative electrode of the transient voltage suppression diode 211 .

[0148] Specifically, when an overvoltage is input to the input end of the surge protection circuit 210, the solid discharge tube 214 quickly changes to a low resistance state to form a conductive path. At this time, the energy of the overvoltage is shunted into the solid discharge tube, thereby directing the overvoltage to the ground. In this way, the energy of the overvoltage is dissipated to prevent it from continuing to be transmitted to other components in the circuit, playing a role in surge protection, ensuring that the photoelectric coupler is not affected by the instantaneous high voltage, and improving the stability of the photoelectric coupler.

[0149] The device for controlling the opening and closing of a circuit breaker provided in this embodiment can achieve the effect of surge protection by using a transient suppression diode and a positive temperature coefficient thermistor by arranging a transient suppression diode and a positive temperature coefficient thermistor in an auxiliary switch circuit. Furthermore, by arranging a solid discharge tube, the solid discharge tube can be further used to achieve the effect of surge protection, thereby achieving a double surge protection effect.

[0150] Corresponding to the aforementioned device for controlling the opening and closing of a circuit breaker, the present application also provides a circuit breaker, which includes the device for controlling the opening and closing of a circuit breaker as described in any one of the first aspects of the present application.

[0151] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A device for controlling the opening and closing of a circuit breaker, characterized in that: The device comprises an isolation power supply circuit, an auxiliary switch circuit and a controller; wherein, The input end of the isolated power supply circuit is connected to an external voltage source, and the output end of the isolated power supply circuit is connected to a power supply access end of the auxiliary switch circuit; the isolated power supply circuit is used to supply power to the auxiliary switch circuit; The output end of the auxiliary switch circuit is connected to the controller; the auxiliary switch circuit is used to receive the opening and closing control signal through the signal input end, and output the opening and closing control signal to the controller; The controller is used to perform opening and closing control of the circuit breaker according to the opening and closing control signal.

2. The device according to claim 1, characterized in that The device also includes a micro switch, which is connected to the circuit breaker through mechanical transmission, and the micro switch is electrically connected to the controller; wherein, The micro switch is used to detect the opening and closing state of the circuit breaker and feed back the detection result to the controller; The controller is also used to determine the opening and closing state of the circuit breaker according to the detection result fed back by the micro switch.

3. The device according to claim 1, characterized in that The isolated power supply circuit includes a first filter circuit, a power supply module, a second filter circuit and an interference suppression circuit; wherein, The first filter circuit is connected in parallel between the positive input terminal and the negative input terminal of the power module; The second filter circuit is connected in parallel between the positive output terminal and the negative output terminal of the power module; The interference suppression circuit is connected between the negative input terminal and the negative output terminal; The positive input terminal constitutes the input terminal of the isolated power supply circuit; the positive output terminal constitutes the output terminal of the isolated power supply circuit.

4. The device according to claim 3, characterized in that The isolated power supply circuit also includes a start-stop control circuit; the start-stop control circuit is arranged between the external voltage source and the positive input terminal, and the control terminal of the start-stop control circuit is connected to the controller; wherein, The controller is further used to control the start-stop control circuit to be turned on after a preset time period when it is detected that the circuit breaker is powered on; The controller is also used to control the start-stop control circuit to disconnect when it is detected that the circuit breaker is powered off.

5. The device according to claim 4, characterized in that The start-stop control circuit includes a first resistor, a second resistor, a first capacitor, a transistor, a third resistor, a fourth resistor and a MOS tube; wherein, The first end of the first resistor constitutes the control end of the start-stop control circuit, and the second end of the first resistor is connected to the base of the transistor; The first end of the second resistor and the first end of the first capacitor are both connected to the base of the transistor, the second end of the second resistor and the second end of the first capacitor are both connected to the emitter of the transistor, and the emitter is grounded; The first end of the third resistor is connected to the collector of the transistor, the second end of the third resistor is connected to the first end of the fourth resistor and then connected to the gate of the MOS transistor, and the second end of the fourth resistor and the drain of the MOS transistor are both connected to the external voltage source; The source of the MOS tube is connected to the positive input terminal.

6. The device according to claim 1, characterized in that The auxiliary switch circuit includes a fifth resistor, a photocoupler and a surge protection circuit; wherein, A first end of the fifth resistor is connected to the output end of the isolation power supply circuit, and a second end of the fifth resistor is connected to the positive electrode of the primary diode of the photoelectric coupler; The input end of the surge protection circuit is used to receive the opening and closing control signal, and the output end of the surge protection circuit is connected to the cathode of the diode on the primary side of the photoelectric coupler; The secondary side of the photoelectric coupler is connected to the controller.

7. The device according to claim 6, characterized in that The surge protection circuit includes a transient suppression diode, a positive temperature coefficient thermistor and a switch device; wherein, The positive electrode of the transient suppression diode is connected to the first end of the positive temperature coefficient thermistor, and together constitute the output end of the surge protection circuit; the negative electrode of the transient suppression diode is connected to the second end of the positive temperature coefficient thermistor through the switching device, and the negative electrode of the transient suppression diode is grounded; The control end of the switch device constitutes the input end of the surge protection circuit, and is used to receive the opening and closing control signal, and is turned on or off under the control of the opening and closing control signal.

8. The device according to claim 7, characterized in that The surge protection circuit also includes a solid discharge tube; wherein, The positive electrode of the solid discharge tube is connected to the second end of the positive temperature coefficient thermistor, and the negative electrode of the solid discharge tube is connected to the negative electrode of the transient suppression diode.

9. The device according to claim 3, characterized in that The power module includes a switching power chip and a transformer; wherein, The power input terminal of the switching power chip constitutes the positive input terminal of the power module, and the ground terminal of the switching power chip constitutes the negative input terminal of the power module; The power input terminal of the switching power supply chip is connected to the main winding on the input side of the transformer, and the first switch terminal and the second switch terminal of the switching power supply chip are respectively connected to the two secondary windings of the input terminal of the transformer; The main winding on the output side of the transformer constitutes the positive output terminal of the power module, and the two secondary windings at the output end of the transformer are connected to constitute the negative output terminal of the power module.

10. A circuit breaker, characterized in that: A device for controlling the opening and closing of a circuit breaker comprising the device described in any one of claims 1 to 9.

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