Special 2 +1 dual-backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker

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By designing a 2+1 dual backup power circuit for the circuit breaker of the permanent magnet eddy current repulsive mechanism, the operation speed and reliability of the circuit breaker in a short-circuit current environment is solved. , ensuring the safe operation of the power system.

CN119401633APending Publication Date: 2025-02-07ANHUI HEKAI ELECTRICAL TECH CO LTD

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Patent Information

Application Number: CN202411602237.7
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-11-11
Publication Date: 2025-02-07

AI Technical Summary

Technical Problem

In the power system, huge short-circuit current threatens the safe operation of the power system, leading to new requirements on the operating speed and reliability of the circuit breaker of the permanent magnet eddy current repulsive mechanism. The normal operation of the energy storage device is crucial.

Method used

A dedicated 2+1 dual backup power circuit based on the circuit breaker of the permanent magnet eddy current repulsive mechanism was designed, including a backup power module, a switch-opening charging module, a switch-opening charging module and a backup charging module. By real-time detection of the switch-opening power module Output status ensures that the circuit breaker can still operate normally when the module fails.

Benefits of technology

This circuit can rely on the backup module to ensure the normal operation of the circuit breaker when the circuit breaker is short-circuited, thereby reducing equipment damage caused by module problems caused by the inability to disconnect the circuit breaker.

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Abstract

The invention discloses a special 2 + 1 dual backup power supply circuit based on a permanent magnet eddy current repulsion mechanism breaker, and the circuit comprises a backup power supply module, an opening charging module, a closing charging module, and a standby charging module. Wherein the switching-on charging module and the switching-off charging module are simultaneously connected with the switching-on power supply sampling abnormity starting backup power supply module and the backup charging module, and the output end of the switching-on power supply sampling abnormity starting backup power supply module is connected with the backup charging module; the switching-on power supply sampling is abnormal, the backup power supply module is started to monitor the voltage of the switching-on and switching-off charging module in real time, and when any one of the switching-on and switching-off charging module breaks down and energy storage of the switching-on and switching-off energy storage capacitor is abnormal, the backup power supply circuit starts the backup power supply module to supply power to the lost switching-on and switching-off energy storage capacitor. According to the invention, a certain accident loss caused by power-off maintenance due to power failure or charging failure of the permanent magnet eddy current repulsion mechanism circuit breaker and failure of action of the circuit breaker can be well solved.

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Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a special 2+1 dual backup power supply circuit based on a permanent magnet eddy current repulsion mechanism circuit breaker. Background Art

[0002] With the expansion of the scale of power systems and the rapid growth of power grid loads, the level of short-circuit current in power systems has increased year by year, and the huge short-circuit current has seriously threatened the safe operation of power systems. Therefore, circuit breakers based on permanent magnetic eddy current repulsion mechanisms are widely used. This has put forward new requirements for the action speed and reliability of permanent magnetic eddy current repulsion mechanism circuit breakers. One of the important factors affecting the stability and speed of permanent magnetic eddy current repulsion mechanism circuit breakers is the energy storage device of the permanent magnetic mechanism circuit breaker. Therefore, ensuring the normal energy storage of the permanent magnetic eddy current repulsion mechanism circuit breaker has become the key to the long-term stable operation of the permanent magnetic eddy current repulsion mechanism circuit breaker. Summary of the invention

[0003] The present invention proposes a special 2+1 dual backup power supply circuit based on a permanent magnet eddy current repulsion mechanism circuit breaker, which can at least solve one of the technical problems in the background technology.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A special 2+1 dual backup power supply circuit based on a permanent magnet eddy current repulsion mechanism circuit breaker, comprising a backup power supply module, a switch-off charging module, a switch-on charging module, and a standby charging module;

[0006] The backup power supply module is used to start when the voltage sampling of the opening and closing circuit is abnormal, and supply power to the circuit breaker;

[0007] The opening charging module and the closing charging module are separated from the backup charging module by a partition structure, which is used to detect faults of the opening charging module and the closing charging module;

[0008] The closing charging module and the opening charging module are connected to the backup power module and the backup charging module at the same time; the output end of the backup power module is connected to the input end of the backup charging module, and the output end of the backup charging module is connected to the backup power module through the relay K1.

[0009] Furthermore, the partition structure of the present invention includes diodes V7, V11, V12, V13, V14, V15, resistors R43, R48, and interfaces XS2, XS3;

[0010] The interface XS2 is the access port for the opening charging module and the closing charging module, and the interface XS3 is the access port for the external opening and closing capacitor energy storage device;

[0011] Port 2 of XS2 is connected to port 3, and port 2 is connected to GND; port 2 of XS3 is connected to port 3, and port 2 is connected to port 3 of XS2; port 1 of XS2 is connected to the positive electrode of diode V12, the negative electrode of diode V12 is connected to resistor R43, and the other end of R43 is connected to port 4 of XS3; port 4 of XS2 is connected to the positive electrode of diode V14, the negative electrode of diode V14 is connected to resistor R48, and the other end of resistor R48 is connected to port 1 of XS3; diode V15 is connected in parallel across resistor R48, with the positive electrode connected between V14 and resistor R48, and the negative electrode connected to port 1 of XS3; diode V11 is connected in parallel across resistor R43, with the positive electrode connected between diode V12 and resistor R43, and the negative electrode connected to port 4 of XS3; the negative electrode of diode V13 is connected to the positive electrode of diode V15, and the negative electrode of diode V7 is connected to the positive electrode of diode V11.

[0012] Furthermore, the power supply structure shared by the opening charging module and the closing charging module of the present invention;

[0013] The power supply structure specifically includes optocouplers U7 and U8, MOS tubes Q3 and Q4, resistors R33, R34, R36, R28, R29, R37, R22, R23, R26, R15, R16, R13, diodes V1, V2, V4, V5, lamp bead LED3, and relay K1;

[0014] Port 1 of the optocoupler U8 is connected to resistor R33, resistors R33, R34, and R36 are connected in sequence, the anode of the diode V5 is connected to port 2 of the optocoupler U8, the two are grounded, the cathode of the diode V5 is connected to port 1 of the optocoupler U8, port 5 of the optocoupler U8 is connected to a +15V voltage source, and port 4 of the optocoupler U8 is connected to port 5 of the optocoupler U7;

[0015] Port 1 of the optocoupler U7 is connected to resistor R28, resistors R28, R29, and R37 are connected in sequence, the anode of the diode V4 is connected to port 2 of the optocoupler U7, the two are grounded, the cathode of the diode V4 is connected to port 1 of the optocoupler U7; port 4 of the optocoupler U7 is connected to diode V1 and resistor R15 in sequence;

[0016] The control port 1 of the MOS tube Q3 is connected to the resistor R13, the other end of the resistor R13 is grounded, and the port 3 of the MOS tube Q3 is grounded; one end of the resistor R22 is connected to +15V and the other end is connected in parallel to the port 2 of the MOS tube Q3 and the resistor R23, the resistor R23 is connected in parallel to the positive electrode of the electrolytic capacitor C9 and the resistor R16, and the control port 1 of the MOS tube Q4; the electrolytic capacitor C9, the resistor R16, and the port 3 of the MOS tube Q3 are grounded;

[0017] Relay K1 port 1 is connected to +15V and the cathode of diode V2, relay K1 port 2 is connected to the anode of diode V2, MOS tube Q3 port 2, the cathode of lamp bead LED3, the anode of lamp bead LED3 is connected to resistor R26, and the other end of resistor R26 is connected to +15V;

[0018] Among them, resistors R36, R34, R33 and optocoupler U8 form the closing output sampling, resistors R37, R29, R28 and optocoupler U7 form the opening module output sampling, and the output ends of optocouplers U8 and U7 are connected in series to form an AND gate. When one of the closing and opening power supply modules is lost, relay K1 will be started in about 8S to supply power to the backup power supply output.

[0019] Furthermore, if the output terminal X1 voltage of the backup power module of the present invention has no output within 1S, a short circuit fault is determined, the output of the switching power supply is turned off, and the power supply is restarted after 40S.

[0020] Furthermore, the backup charging module of the present invention includes an AC / DC module, a power management module, an operational amplifier circuit module, and a charging circuit module;

[0021] The AC / DC module converts the input high voltage into a low voltage of +15V to provide working voltage for the normal operation of the power management module and the operational amplifier circuit module; the power management module is used to drive the transformer to allow the backup charging module to output normally and shut down; the operational amplifier circuit module samples the output of the backup charging module and feeds it back to the power management module to achieve a feedback closed loop.

[0022] Furthermore, the charging circuit module of the present invention includes a rectifier bridge B1, resistors R30, R31, R32, R35, R38, R44, R45, R46, R47, a varistor RT2, capacitors CX1, CB1, C21, polar capacitors C19, C18, C20, diodes V6, V8, V9, V10, V16, a fuse F1, a MOS tube Q5, and a magnetic core T1;

[0023] The two AC signal terminals of the rectifier bridge B1 are connected to the fuse F1 and the varistor RT2 respectively, and the capacitor CX1 is connected in parallel to the AC signal terminal of the rectifier bridge B1, one end of which is connected to the fuse F1 as the circuit external port ACL, and the other end is connected to the varistor RT2 as the circuit external port ACN; the forward voltage terminal of the rectifier bridge B1 is connected to the voltage source VCC+, and the reverse voltage terminal is connected to GND, and the capacitors CB1 and C19 are connected in parallel between the forward voltage terminal and the reverse voltage terminal of the rectifier bridge B1; the resistor R46, the resistor R38, and the polar capacitor C18 are connected in sequence, the resistor R46 is connected to the voltage source VCC+, and the negative terminal of the polar capacitor is connected to the reverse voltage terminal of the rectifier bridge B1; the anode of the diode V8 is connected to the positive terminals of the resistor R38 and the polar capacitor C18, and the cathode is connected to the voltage source VCC;

[0024] The magnetic core T1, diodes V9, V10, V16, resistors R44, R45, R47, capacitor C21, and polarity capacitor C20 constitute the topological structure of the flyback converter, wherein the opposite-name ends 5 and 6 of the magnetic core are connected to the collector of the MOS tube Q5, the gate of the MOS tube is connected to resistors R35 and R31, the other end of the resistor R31 is connected to resistor R30 and grounded at the same time, the resistor R32 is connected in parallel across the resistor R30, the diode V6 is connected in parallel across the resistor R35, wherein the positive end of the diode V6 is connected to the gate of the MOS tube, the emitter of the MOS tube is connected to resistor R30, the other end of the resistor R30 is grounded, and the resistor R32 is connected in parallel across the resistor R30.

[0025] Furthermore, the AC / DC module of the present invention includes a power chip U6, a diode V3, a capacitor C15, and a varistor RT1; the AC-L port of the power chip U6 is connected to the varistor RT1, the +VO terminal of the power chip U6 is connected to the positive electrode of the diode V3 and the capacitor C15, the other end of the capacitor C15 is connected to the GND end of the power chip U6 and is grounded, the cathode of the diode V3 is connected to the voltage source VCC, and the +VO end of the power chip U6 outputs a +15V voltage to the outside.

[0026] Furthermore, the backup charging module of the present invention adopts a flyback topology structure, so that the circuit power is 40W and the efficiency is 80%. When the charging module is normally opened and closed without abnormality, the backup power supply module does not work.

[0027] It can be seen from the above technical solution that the dedicated 2+1 dual backup power supply circuit based on the permanent magnet eddy current repulsion mechanism circuit breaker of the present invention detects the output status of the split and combined charging module in real time. When one or all of the split and combined modules are short-circuited, the backup module can still make the circuit breaker operate normally, reducing the circuit breaker failure caused by module problems, resulting in burning of equipment. The biggest advantage of the present invention is that it uses pure hardware with strong anti-interference ability and has multiple protection detection functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the circuit structure of the present invention;

[0029] Figure 2 is a circuit schematic diagram of the present invention;

[0030] Figure 3 This is a structural diagram of the backup power supply started by abnormal closing power supply sampling of the present invention;

[0031] Figure 4 This is a schematic diagram of the access port of the opening and closing charging module of the present invention;

[0032] Figure 5 It is a schematic diagram of the power supply circuit of the opening and closing charging module of the present invention;

[0033] Figure 6 This is a schematic diagram of the backup charging module structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the backup charging module circuit of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0036] like Figure 1 , Figure 2 As shown, the dedicated 2+1 dual backup power supply circuit based on the permanent magnet eddy current repulsion mechanism circuit breaker described in this embodiment includes a backup power supply module, a switch-off charging module, a switch-on charging module, and a standby charging module;

[0037] The backup power supply module is used to start supplying power to the circuit breaker when the power sampling of the opening and closing circuit is abnormal;

[0038] The closing charging module and the opening charging module are connected to the backup power supply module and the standby charging module at the same time. The closing power supply sampling abnormality starts the connection between the backup power supply module output end and the standby charging module. The closing charging module and the opening charging module are separated from the standby charging module output end OUT+ by diodes V14, V12, V15, and V11 to achieve the function of detecting faults of the opening charging module and the closing charging module. The standby charging module is connected to the backup power supply module.

[0039] The backup power module structure is as follows: Figure 3As shown, it specifically includes timer chips U2 and U3, resistors R1, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12, capacitors C6, C3 and C4, polarity capacitors C5 and C1, lamp bead LED1, optocoupler N1, MOS tubes Q1 and Q2, operational amplifiers U1A and U1B, and timers U2 and U3; the reverse input terminal of the operational amplifier U1B is connected to resistor R7, and the forward input terminal is connected to the common terminal of resistor R4 and resistor R11; the other end of resistor R11 is connected to capacitor C7, and capacitor C7 is connected to the output end of operational amplifier U1B; the positive power supply terminal of operational amplifier U1B is connected to capacitor C6, and both ends of capacitor C6 are connected to +15V voltage source and GND; the operational amplifier U1B is connected to the output end of capacitor C7, and the positive power supply terminal of operational amplifier U1B is connected to capacitor C6, and both ends of capacitor C6 are connected to +15V voltage source and GND; the operational amplifier U1B is connected to the output end of capacitor C7, and the positive power supply terminal of operational amplifier U1B is connected to capacitor C6, and the two ends of capacitor C6 are connected to +15V voltage source and GND. The output end of amplifier U1B is connected to the reverse input end of operational amplifier U1A, and the reverse input end of operational amplifier U1A is connected to the output end; the source of MOS tube Q1 is grounded, the gate is connected to resistor R8, and the drain is connected to lamp bead LED1, wherein the other end of the lamp bead is connected to resistor R9, and resistors R9 and R8 are both connected to the output end of operational amplifier U1A; resistor R3 is connected to the gate and source of MOS tube Q1, resistor R6 is connected to the gate and source of MOS tube Q2, the drain of MOS tube Q1 is connected to the gate of MOS tube, the source of MOS tube Q2 is connected to +15V voltage source, and the drain is connected to timer chips U2 and U3, the output end of timer U3 is connected to optocoupler N1, and the output end of optocoupler serves as the output end X1 of the module.

[0040] The specific working principle is: if there is no output at the output terminal X1 voltage of the detection circuit within 1S, it is determined to be a short circuit fault, the output of the switching power supply is turned off, and it is restarted after 40S.

[0041] The diode isolation structure of the switch charging module is as follows: Figure 4 As shown, it includes diodes V7, V11, V12, V13, V14, V15, resistors R43, R48, and interfaces XS2, XS3;

[0042] Among them, XS2 is the access port for the opening charging module and the closing charging module, and XS3 is the access port for the external closing and opening capacitor energy storage device; Port 2 of XS2 itself is connected to Port 3, Port 2 is connected to GND, Port 2 of XS3 itself is connected to Port 3, Port 2 is connected to Port 3 of XS2; Port 1 of XS2 is connected to the positive electrode of diode V12, the negative electrode of diode V12 is connected to resistor R43, and the other end of R43 is connected to Port 4 of XS3; Port 4 of XS2 is connected to the positive electrode of diode V14, and the negative electrode of diode V12 is connected to resistor R43, and the other end of R43 is connected to Port 4 of XS3; Port 4 of XS2 is connected to the positive electrode of diode V14, and the negative electrode of diode V14 is connected to resistor R43, and the other end of R43 is connected to Port 4 of XS3. The cathode of the tube V14 is connected to the resistor R48, and the other end of the resistor R48 is connected to the port 1 of the XS3; the diode V15 is connected in parallel to both ends of the resistor R48, the anode is connected between V14 and the resistor R48, and the cathode is connected to the port 1 of the XS3; the diode V11 is connected in parallel to both ends of the resistor R43, the anode is connected between the diode V12 and the resistor R43, and the cathode is connected to the port 4 of the XS3; the cathode of the diode V13 is connected to the anode of the diode V15, and the cathode of the diode V7 is connected to the anode of the diode V11.

[0043] The power supply structure of the opening and closing charging module is as follows Figure 5 As shown, the power supply structure includes optical couplers U7 and U8, MOS tubes Q3 and Q4, resistors R33, R34, R36, R28, R29, R37, R22, R23, R26, R15, R16, R13, diodes V1, V2, V4, V5, lamp bead LED3, and relay K1;

[0044] Port 1 of the optocoupler U8 is connected to resistor R33, resistors R33, R34, and R36 are connected in sequence, the anode of the diode V5 is connected to port 2 of the optocoupler U8, the two are grounded, the cathode of the diode V5 is connected to port 1 of the optocoupler U8, port 5 of the optocoupler U8 is connected to a +15V voltage source, and port 4 of the optocoupler U8 is connected to port 5 of the optocoupler U7;

[0045] Port 1 of the optocoupler U7 is connected to resistor R28, resistors R28, R29, and R37 are connected in sequence, the anode of the diode V4 is connected to port 2 of the optocoupler U7, the two are grounded, the cathode of the diode V4 is connected to port 1 of the optocoupler U7; port 4 of the optocoupler U7 is connected to diode V1 and resistor R15 in sequence;

[0046] The control port 1 of the MOS tube Q3 is connected to the resistor R13, the other end of the resistor R13 is grounded, and the port 3 of the MOS tube Q3 is grounded; one end of the resistor R22 is connected to +15V and the other end is connected in parallel to the port 2 of the MOS tube Q3 and the resistor R23, the resistor R23 is connected in parallel to the positive electrode of the electrolytic capacitor C9 and the resistor R16, and the control port 1 of the MOS tube Q4; the electrolytic capacitor C9, the resistor R16, and the port 3 of the MOS tube Q3 are grounded;

[0047] Relay K1 port 1 is connected to +15V and the cathode of diode V2, relay K1 port 2 is connected to the anode of diode V2, MOS tube Q3 port 2, the cathode of lamp bead LED3, the anode of lamp bead LED3 is connected to resistor R26, and the other end of resistor R26 is connected to +15V;

[0048] The working principle of the power supply structure of the opening and closing charging module is as follows:

[0049] Resistors R36, R34, R33 and optocoupler U8 form the closing output sampling, resistors R37, R29, R28 and optocoupler U7 form the opening module output sampling (the diode mentioned above is to separate the output of the backup module so that the sampling only collects the output of the closing and opening module). The output ends of optocouplers U8 and U7 are connected in series to form an AND gate. When one of the closing and opening power supply modules is lost, relay K1 will be started in about 8S to supply power to the backup power supply output.

[0050] The backup charging module structure is as follows: Figure 6 , Figure 7 As shown, it specifically includes an AC / DC module, a power management module, an operational amplifier circuit module, and a charging circuit module;

[0051] The AC / DC module (DC / AC110V-220V power supply) converts the input high voltage into a low voltage of +15V to provide working voltage for the normal operation of the power management module and the operational amplifier circuit module; the power management module is used to drive the transformer to allow the backup charging module to output normally and shut down; the operational amplifier circuit module samples the output of the backup charging module and feeds it back to the power management module to achieve a feedback closed loop.

[0052] The AC / DC module includes a power chip (WA3-220D12A3) U6, a diode V3, a capacitor C15, and a varistor RT1; the AC-L port of the power chip U6 is connected to the varistor RT1, the +VO terminal of the power chip U6 is connected to the positive electrode of the diode V3 and the capacitor C15, the other end of the capacitor C15 is connected to the GND terminal of the power chip U6 and is grounded, the cathode of the diode V3 is connected to the voltage source VCC, and the +VO terminal of the power chip U6 outputs a +15V voltage to the outside.

[0053] The drive transformer is composed of polarity capacitors C16, C17 and chip U5 (WRB1212CS). The VIN+ terminal of chip U5 is connected to the +15V voltage output by the AC / DC module and the positive electrode of polarity capacitor C16. The VIN- terminal of chip U5 is connected to the negative electrode of polarity capacitor C16 and grounded. The OUT- terminal of chip U5 is connected to the negative electrode of polarity capacitor C17 and grounded. The OUT+ terminal of chip U5 is connected to the positive electrode of polarity capacitor C17 and outputs a 15V voltage.

[0054] The power management module includes a power management chip U4, resistors R24, R14, R21, and capacitors C8, C10, C11, C12, and C13; the COM terminal of the power management chip U4 is connected to resistor R14, and the other end of the resistor R14 is connected to the FB end of the power management chip U4 and is grounded at the same time; the capacitor C8 is connected in parallel to both ends of the resistor R14, and one end of it serves as the output end X1 of the power management module; the Is terminal of the power management chip U4 is connected to capacitor C10 and resistor R24, the other end of the capacitor C10 is connected to resistor R14, and shares a common ground with the resistor R14, and the other end of the resistor R24 is connected to the CT end of the power management chip U4; the capacitor C12 is connected in parallel to both ends of the resistor R24; the REF terminal of the power management chip U4 is connected to resistor R21, and the two ends of the resistor R21 are respectively connected to capacitors C11 and C13, and the capacitors C11 and C13 share a common ground with the power management chip U4.

[0055] The operational amplifier circuit module includes operational amplifiers U1C and U1D, resistors R18, R19, R27, R2, and R17, a capacitor C14, a lamp bead LED2, and an optical coupler N2; port 3 of the operational amplifier U1D is connected to resistor R18 as the input terminal VHAD of the module, and port 2 of the operational amplifier U1D is connected to resistor R19 as the input terminal VREF1 of the module; resistor R27 is connected to capacitor C14, and the other end of capacitor C14 is connected to port 1 of the operational amplifier U1D, and the other end of resistor R27 is connected to port 2 of the operational amplifier U1D; the operational amplifier U Port 1 of 1D is connected to port 12 of operational amplifier U1C, and port 13 of operational amplifier U1C is connected to port 14 of operational amplifier U1C; port 14 of operational amplifier U1C is connected to resistor R17 and resistor R2, resistor R17 is connected to lamp bead LED2, lamp bead LED2 is connected to port 11 of operational amplifier U1C, the other end of resistor R2 is connected to port 2 of optocoupler N2, port 1 of optocoupler N2 is connected to port 11 of operational amplifier U1C, the two are connected to a common ground, port 3 of optocoupler N2 is grounded, and port 4 of optocoupler N2 serves as the module output terminal X1.

[0056] The charging circuit module includes a rectifier bridge B1, resistors R30, R31, R32, R35, R38, R44, R45, R46, R47, a varistor RT2, capacitors CX1, CB1, C21, polar capacitors C19, C18, C20, diodes V6, V8, V9, V10, V16, a fuse F1, a MOS tube Q5, and a magnetic core T1;

[0057] The two AC signal terminals of the rectifier bridge B1 are connected to the fuse F1 and the varistor RT2 respectively, and the capacitor CX1 is connected in parallel to the AC signal terminal of the rectifier bridge B1, one end of which is connected to the fuse F1 as the circuit external port ACL, and the other end is connected to the varistor RT2 as the circuit external port ACN; the forward voltage terminal of the rectifier bridge B1 is connected to the voltage source VCC+, and the reverse voltage terminal is connected to GND, and the capacitors CB1 and C19 are connected in parallel between the forward voltage terminal and the reverse voltage terminal of the rectifier bridge B1; the resistor R46, the resistor R38, and the polar capacitor C18 are connected in sequence, the resistor R46 is connected to the voltage source VCC+, and the negative terminal of the polar capacitor is connected to the reverse voltage terminal of the rectifier bridge B1; the anode of the diode V8 is connected to the positive terminals of the resistor R38 and the polar capacitor C18, and the cathode is connected to the voltage source VCC;

[0058] The magnetic core T1, diodes V9, V10, V16, resistors R44, R45, R47, capacitor C21, and polarity capacitor C20 constitute the topological structure of the flyback converter, wherein the opposite-name ends 5 and 6 of the magnetic core are connected to the collector of the MOS tube Q5, the gate of the MOS tube is connected to resistors R35 and R31, the other end of the resistor R31 is connected to resistor R30 and grounded at the same time, the resistor R32 is connected in parallel across the resistor R30, the diode V6 is connected in parallel across the resistor R35, wherein the positive end of the diode V6 is connected to the gate of the MOS tube, the emitter of the MOS tube is connected to resistor R30, the other end of the resistor R30 is grounded, and the resistor R32 is connected in parallel across the resistor R30.

[0059] Among them, the backup charging module adopts a flyback topology structure, which makes the circuit power 40W and the efficiency 80%. When the charging module is normally opened and closed without any abnormality, the backup power supply module does not work.

[0060] The working principle of the dual backup power supply circuit is specifically as follows: resistors R36, R34, R33, and optocoupler U8 form a closing output sampling, resistors R37, R29, R28, and optocoupler U7 form an opening module output sampling, and two sampling routes continuously sample the high-voltage closing and opening power supply module. Since the output ends of the optocouplers U8 and U7 are connected in series to form an AND gate, when one of the closing and opening energy storage is lost, the output of the diode V1 will be 0V, and the MOS tube Q4 will change from the on state to the off state, thereby changing the MOS tube Q4 from the off state to the on state, and in the process of the MOS tube state change, resistors R22, R23, R16, and capacitor C9 are used to generate a delay of about 8S for conduction, because the output load of the closing and opening power supply module is a capacitor, the voltage across the capacitor cannot change suddenly to prevent false triggering caused by abnormal closing and opening sampling at the moment of power-on, and when the MOS tube Q4 is turned on, the relay K1 is turned on and its output node changes from normally open to normally closed.

[0061] In summary, the present invention proposes a universal 2+1 backup power supply module, which includes a backup power supply module, an opening charging module, a closing charging module, and a backup charging module. By real-time detection of the output voltage state of the opening and closing power supply module, it is determined whether there is an abnormal situation, including detection of charging module abnormality and opening and closing energy storage capacitor abnormality. The present invention is compatible with conventional permanent magnet eddy current repulsion mechanism circuit breaker power supplies, and the circuit principle of permanent magnet eddy current repulsion mechanism circuit breaker power supplies for special needs can still be realized, and only the compatibility of the components needs to be considered. Overcome the problem of permanent magnet vacuum circuit breaker refusal to operate caused by charging failure of permanent magnet eddy current repulsion mechanism circuit breaker power supply, and reduce losses and hazards.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A special 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker, characterized in that: Including backup power supply module, opening charging module, closing charging module and standby charging module; The backup power supply module is used to start when the voltage sampling of the opening and closing circuit is abnormal, and supply power to the circuit breaker; The opening charging module and the closing charging module are separated from the backup charging module by a partition structure, which is used to detect faults of the opening charging module and the closing charging module; The closing charging module and the opening charging module are connected to the backup power module and the backup charging module at the same time; the output end of the backup power module is connected to the input end of the backup charging module, and the output end of the backup charging module is connected to the backup power module through the relay K1.

2. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 1 is characterized in that The partition structure includes diodes V7, V11, V12, V13, V14, V15, resistors R43, R48, and interfaces XS2, XS3; The interface XS2 is the access port for the opening charging module and the closing charging module, and the interface XS3 is the access port for the external opening and closing capacitor energy storage device; Port 2 of XS2 is connected to port 3, and port 2 is connected to GND; port 2 of XS3 is connected to port 3, and port 2 is connected to port 3 of XS2; port 1 of XS2 is connected to the positive electrode of diode V12, the negative electrode of diode V12 is connected to resistor R43, and the other end of R43 is connected to port 4 of XS3; port 4 of XS2 is connected to the positive electrode of diode V14, the negative electrode of diode V14 is connected to resistor R48, and the other end of resistor R48 is connected to port 1 of XS3; diode V15 is connected in parallel across resistor R48, with the positive electrode connected between V14 and resistor R48, and the negative electrode connected to port 1 of XS3; diode V11 is connected in parallel across resistor R43, with the positive electrode connected between diode V12 and resistor R43, and the negative electrode connected to port 4 of XS3; the negative electrode of diode V13 is connected to the positive electrode of diode V15, and the negative electrode of diode V7 is connected to the positive electrode of diode V11.

3. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 1 is characterized in that: A power supply structure shared by the opening charging module and the closing charging module; The power supply structure specifically includes optocouplers U7 and U8, MOS tubes Q3 and Q4, resistors R33, R34, R36, R28, R29, R37, R22, R23, R26, R15, R16, R13, diodes V1, V2, V4, V5, lamp bead LED3, and relay K1; Port 1 of the optocoupler U8 is connected to resistor R33, resistors R33, R34, and R36 are connected in sequence, the anode of the diode V5 is connected to port 2 of the optocoupler U8, the two are grounded, the cathode of the diode V5 is connected to port 1 of the optocoupler U8, port 5 of the optocoupler U8 is connected to a +15V voltage source, and port 4 of the optocoupler U8 is connected to port 5 of the optocoupler U7; Port 1 of the optocoupler U7 is connected to resistor R28, resistors R28, R29, and R37 are connected in sequence, the anode of the diode V4 is connected to port 2 of the optocoupler U7, the two are grounded, the cathode of the diode V4 is connected to port 1 of the optocoupler U7; port 4 of the optocoupler U7 is connected to diode V1 and resistor R15 in sequence; The control port 1 of the MOS tube Q3 is connected to the resistor R13, the other end of the resistor R13 is grounded, and the port 3 of the MOS tube Q3 is grounded; one end of the resistor R22 is connected to +15V and the other end is connected in parallel to the port 2 of the MOS tube Q3 and the resistor R23, the resistor R23 is connected in parallel to the positive electrode of the electrolytic capacitor C9 and the resistor R16, and the control port 1 of the MOS tube Q4; the electrolytic capacitor C9, the resistor R16, and the port 3 of the MOS tube Q3 are grounded; Relay K1 port 1 is connected to +15V and the cathode of diode V2, relay K1 port 2 is connected to the anode of diode V2, MOS tube Q3 port 2, the cathode of lamp bead LED3, the anode of lamp bead LED3 is connected to resistor R26, and the other end of resistor R26 is connected to +15V; Among them, resistors R36, R34, R33 and optocoupler U8 form the closing output sampling, resistors R37, R29, R28 and optocoupler U7 form the opening module output sampling, and the output ends of optocouplers U8 and U7 are connected in series to form an AND gate. When one of the closing and opening power supply modules is lost, relay K1 will be started in about 8S to supply power to the backup power supply output.

4. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 1 is characterized in that: If the output terminal X1 voltage of the backup power module has no output within 1S, it is determined to be a short circuit fault, the output of the switching power supply is turned off, and the power supply is restarted after 40S.

5. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 1 is characterized in that: The backup charging module includes an AC / DC module, a power management module, an operational amplifier circuit module, and a charging circuit module; The AC / DC module converts the input high voltage into a low voltage of +15V to provide working voltage for the normal operation of the power management module and the operational amplifier circuit module; the power management module is used to drive the transformer to allow the backup charging module to output normally and shut down; the operational amplifier circuit module samples the output of the backup charging module and feeds it back to the power management module to achieve a feedback closed loop.

6. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 5 is characterized in that: The charging circuit module includes a rectifier bridge B1, resistors R30, R31, R32, R35, R38, R44, R45, R46, R47, a varistor RT2, capacitors CX1, CB1, C21, polar capacitors C19, C18, C20, diodes V6, V8, V9, V10, V16, a fuse F1, a MOS tube Q5, and a magnetic core T1; The two AC signal terminals of the rectifier bridge B1 are connected to the fuse F1 and the varistor RT2 respectively, and the capacitor CX1 is connected in parallel to the AC signal terminal of the rectifier bridge B1, one end of which is connected to the fuse F1 as the circuit external port ACL, and the other end is connected to the varistor RT2 as the circuit external port ACN; the forward voltage terminal of the rectifier bridge B1 is connected to the voltage source VCC+, and the reverse voltage terminal is connected to GND, and the capacitors CB1 and C19 are connected in parallel between the forward voltage terminal and the reverse voltage terminal of the rectifier bridge B1; the resistor R46, the resistor R38, and the polar capacitor C18 are connected in sequence, the resistor R46 is connected to the voltage source VCC+, and the negative terminal of the polar capacitor is connected to the reverse voltage terminal of the rectifier bridge B1; the anode of the diode V8 is connected to the positive terminals of the resistor R38 and the polar capacitor C18, and the cathode is connected to the voltage source VCC; The magnetic core T1, diodes V9, V10, V16, resistors R44, R45, R47, capacitor C21, and polarity capacitor C20 constitute the topological structure of the flyback converter, wherein the opposite-name ends 5 and 6 of the magnetic core are connected to the collector of the MOS tube Q5, the gate of the MOS tube is connected to resistors R35 and R31, the other end of the resistor R31 is connected to resistor R30 and grounded at the same time, the resistor R32 is connected in parallel across the resistor R30, the diode V6 is connected in parallel across the resistor R35, wherein the positive end of the diode V6 is connected to the gate of the MOS tube, the emitter of the MOS tube is connected to resistor R30, the other end of the resistor R30 is grounded, and the resistor R32 is connected in parallel across the resistor R30.

7. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 5 is characterized in that: The AC / DC module includes a power chip U6, a diode V3, a capacitor C15, and a varistor RT1; the AC-L port of the power chip U6 is connected to the varistor RT1, the +VO terminal of the power chip U6 is connected to the positive electrode of the diode V3 and the capacitor C15, the other end of the capacitor C15 is connected to the GND terminal of the power chip U6 and is grounded, the cathode of the diode V3 is connected to the voltage source VCC, and the +VO terminal of the power chip U6 outputs a +15V voltage to the outside.

8. The dedicated 2+1 dual backup power supply circuit based on permanent magnet eddy current repulsion mechanism circuit breaker according to claim 1 is characterized in that: The backup charging module adopts a flyback topology structure, which makes the circuit power 40W and the efficiency 80%. When the charging module is normally opened and closed without any abnormality, the backup power supply module will not work.