Driving circuit of magnetic control mechanism and magnetic control mechanism

Abstract

The application discloses a drive circuit of a magnetic control mechanism and the magnetic control mechanism, and belongs to the technical field of power distribution network equipment. In the application, an interlocking module is arranged in the drive circuit of the magnetic control mechanism, the second conduction path is locked when the first bridge arm and the second bridge arm are driven to work in the first conduction path, and the first conduction path is locked when the first bridge arm and the second bridge arm are driven to work in the second conduction path, so that the drive circuit can not cause the single bridge arm conduction of the full-bridge module when driving the magnetic control mechanism, the switch device in the full-bridge module is prevented from being damaged due to the large current flowing therethrough in an instant, and the reliability of the drive circuit of the magnetic control mechanism is improved.

Description

Technical Field

[0001] This application relates to the field of power distribution network equipment technology, and in particular to a drive circuit and magnetic control mechanism for a magnetic control mechanism. Background Technology

[0002] In related technologies, the driving architecture of the magnetic control mechanism is a full-bridge circuit. In the full-bridge circuit, the four switching devices are controlled by independent driving chips. This can easily lead to a single bridge arm of the full-bridge circuit being turned on, causing the switching devices to be damaged by a large instantaneous current. Utility Model Content

[0003] The main objective of this application is to provide a drive circuit and a magnetic control mechanism for a magnetic control mechanism, which aims to at least partially solve the aforementioned technical problems.

[0004] To achieve the above objectives, in a first aspect, a drive circuit for a magnetic control mechanism is provided, comprising a full-bridge module, a first control module, a second control module, and an interlock module. The full-bridge module includes a first bridge arm and a second bridge arm, and the coil of the magnetic control mechanism is connected between the midpoint of the first bridge arm and the midpoint of the second bridge arm. The first control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain the first control signal according to the first action command, so as to control the first bridge arm and the second bridge arm to conduct in the first conduction path; The second control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain the second control signal according to the second action command, so as to control the first bridge arm and the second bridge arm to conduct in the second conduction path; An interlocking module is connected to a first control module and a second control module respectively. It is used to obtain a first interlocking signal according to a first control signal and output the first interlocking signal to the second control module so that the second control module controls the second conduction path to disconnect according to the first interlocking signal. It is also used to obtain a second interlocking signal according to a second control signal and output the second interlocking signal to the first control module so that the first control module controls the second conduction path to disconnect according to the second interlocking signal.

[0005] Optionally, the interlock module includes a first transistor, a first optocoupler, a second transistor, and a second optocoupler; The first transistor includes a base connected to the second control module to receive a second control signal, a collector connected to the first control module, and a grounded emitter. The first optocoupler includes an anode connected to the second control module to receive a second control signal, a grounded cathode, a collector connected to the first control module, and a grounded emitter. The second transistor includes a base connected to the first control module to receive a first control signal, a collector connected to the second control module, and a grounded emitter. The second optocoupler includes an anode connected to the first control module to receive a first control signal, a grounded cathode, a collector connected to the second control module, and a grounded emitter.

[0006] Optionally, the interlock module includes a first transistor, a first optocoupler, a second transistor, and a second optocoupler; The first transistor includes a base connected to the second control module to receive a second control signal, a collector connected to the first control module, and a grounded emitter. The first optocoupler includes an anode connected to the second control module to receive a second control signal, a grounded cathode, a collector connected to the first control module, and a grounded emitter. The second transistor includes a base connected to the first control module to receive a first control signal, a collector connected to the second control module, and a grounded emitter. The second optocoupler includes an anode connected to the first control module to receive a first control signal, a grounded cathode, a collector connected to the second control module, and a grounded emitter.

[0007] Optionally, the first bridge arm includes a first switching device and a second switching device, and the second bridge arm includes a third switching device and a fourth switching device; The first switching device includes an input terminal connected to a first end of a first energy storage capacitor, an output terminal connected to a first input terminal of a coil, a control terminal connected to a first control module, and a second end of the first energy storage capacitor grounded. The second switching device includes an input terminal connected to the first input terminal of the coil, a grounded output terminal, and a control terminal connected to the second control module; The third switching device includes an input terminal connected to the first terminal of the second energy storage capacitor, an output terminal connected to the second input terminal of the coil, a control terminal connected to the second control module, and the second terminal of the second energy storage capacitor is grounded. The fourth switching device includes an input terminal connected to the second input terminal of the coil, a grounded output terminal, and a control terminal connected to the first control module.

[0008] Optionally, the first control module includes a third optocoupler, a third transistor, a fourth transistor, a fourth optocoupler, a fifth transistor, and a sixth transistor, and the second control module includes a fifth optocoupler, a seventh transistor, an eighth transistor, a sixth optocoupler, a ninth transistor, and a thirteenth transistor; The third optocoupler includes a cathode for receiving a first action command, an emitter connected to the base of a third transistor and the base of a fourth transistor, an anode and a collector connected to a power supply; the emitter of the third transistor, the emitter of the fourth transistor, and the control terminal of the first switching device are connected to a first connection point; the collector of the third transistor is connected to the power supply, and the collector of the fourth transistor is grounded. The fourth optocoupler includes a cathode for receiving a first action command, an emitter connected to the base of a fifth transistor and the base of a sixth transistor, an anode and a collector connected to a power supply; the emitters of the fifth transistor and the sixth transistor and the control terminal of the fourth switching device are connected to a second connection point; the collector of the fifth transistor is connected to the power supply, and the collector of the sixth transistor is grounded. The fifth optocoupler includes a cathode for receiving a second action command, an emitter connected to the base of the seventh transistor and the base of the eighth transistor, an anode and a collector connected to a power supply; the emitter of the seventh transistor, the emitter of the eighth transistor and the control terminal of the third switching device are connected to a third connection point; the collector of the seventh transistor is connected to the power supply, and the collector of the eighth transistor is grounded. The sixth optocoupler includes a cathode for receiving a second action command, an emitter connected to the base of the ninth transistor and the base of the thirteenth transistor, an anode and a collector connected to a power supply; the emitters of the ninth transistor and the thirteenth transistor, and the control terminal of the second switching device are connected to a fourth connection point; the collector of the ninth transistor is connected to the power supply, and the collector of the thirteenth transistor is grounded.

[0009] Optionally, it further includes a first voltage release module connected between the control terminal of the first switching device and the first connection point and used to release the control voltage of the first switching device; The first voltage release module includes a first diode, the anode of the first diode is connected to the control terminal of the first switching device, and the cathode of the first diode is connected to the first connection point; And / or, The drive circuit also includes a second voltage release module connected between the control terminal of the fourth switching device and the second connection point and used to release the control voltage of the fourth switching device. The second voltage release module includes a second diode, the anode of which is connected to the control terminal of the fourth switching device, and the cathode of which is connected to the second connection point. And / or, The drive circuit also includes a third voltage release module connected between the control terminal of the third switching device and the third connection point and used to release the control voltage of the third switching device; The third voltage release module includes a fourth diode, the anode of which is connected to the control terminal of the third switching device, and the cathode of which is connected to the third connection point. And / or, The drive circuit also includes a fourth voltage release module connected between the control terminal of the second switching device and the fourth connection point and used to release the control voltage of the second switching device; The fourth voltage release module includes a third diode, the anode of which is connected to the control terminal of the second switching device, and the cathode of which is connected to the four connection points.

[0010] Optionally, it also includes a unidirectional isolation module disposed between the first energy storage capacitor and the second energy storage capacitor; the unidirectional isolation module is used to control unidirectional conduction between the second energy storage capacitor and the first energy storage capacitor; wherein, the unidirectional isolation module includes a fifth diode; The anode of the fifth diode is connected to the first terminal of the first energy storage capacitor, and the cathode is connected to the first terminal of the second energy storage capacitor.

[0011] Optionally, it also includes a first discharge module connected to the first energy storage capacitor and a second discharge module connected to the second energy storage capacitor; The first discharge module is used to discharge the first driving voltage of the first energy storage capacitor to a safe voltage. The second discharge module is used to discharge the second driving voltage of the second energy storage capacitor to a safe voltage.

[0012] Optionally, the first discharge module includes an eleventh transistor and a fifth switching device, and the second discharge module includes a twelfth transistor and a sixth switching device; The eleventh transistor includes a base connected to the common junction of a first resistor and a second resistor connected in series, a collector connected to the common junction of a third resistor and a fourth resistor connected in series, and a grounded emitter. The first end of the first resistor and the second resistor connected in series are connected to a power supply, and the second end is grounded. The first end of the third resistor and the fourth resistor connected in series are connected to a first energy storage capacitor, and the second end is grounded. The fifth switching device includes an input terminal connected to the first end of the fifth resistor, a control terminal connected to the collector of the eleventh transistor, and a grounded output terminal. The second end of the fifth resistor is connected to the first energy storage capacitor. The twelfth transistor includes a base connected to the common junction of a sixth and seventh resistor in series, a collector connected to the common junction of a eighth and ninth resistor in series, and a grounded emitter. The first terminals of the sixth and seventh resistors in series are connected to a power supply, and the second terminals are grounded. The first terminals of the eighth and ninth resistors in series are connected to a second energy storage capacitor, and the second terminals are grounded. The sixth switching device includes an input terminal connected to the first terminal of a tenth resistor, a control terminal connected to the collector of the twelfth transistor, and a grounded output terminal. The second terminal of the tenth resistor is connected to the second energy storage capacitor.

[0013] Optionally, it also includes an eleventh resistor and a twelfth resistor; The eleventh resistor includes a first terminal connected to the first input terminal of the coil and a second terminal grounded; The twelfth resistor includes a first terminal connected to the second input terminal of the coil and a second terminal grounded.

[0014] Secondly, a magnetic control mechanism is also proposed, including a drive circuit for a magnetic control mechanism as described in any of the above.

[0015] The above technical solution incorporates an interlock module in the drive circuit of the magnetic control mechanism. When the first control module controls the first and second bridge arms to conduct along the first conduction path, a first locking signal is obtained based on the first control signal output by the first control module. This signal controls the second control module to disconnect the second conduction path of the first and second bridge arms, thus locking the second conduction path of the first and second bridge arms. Conversely, when the second control module controls the first and second bridge arms to conduct along the second conduction path, a second locking signal is obtained based on the second control signal output by the second control module. This signal controls the first control module to disconnect the first conduction path of the first and second bridge arms, thus locking the first conduction path of the first and second bridge arms. Therefore, the driving circuit of this application, when driving the first bridge arm and the second bridge arm to work in the first conduction path, locks the second conduction path, and when driving the first bridge arm and the second bridge arm to work in the second conduction path, locks the first conduction path. This ensures that when the driving circuit drives the magnetic control mechanism, the full bridge module will not experience a single bridge arm conduction, thereby preventing the switching devices in the full bridge module from being damaged by a large instantaneous current flow and improving the reliability of the driving circuit of the magnetic control mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the drive circuit of the magnetic control mechanism according to an exemplary embodiment of the present disclosure; Figure 2 The circuit diagram is a schematic diagram of the drive circuit of the magnetic control mechanism according to an exemplary embodiment of this disclosure. Figure 3 This is a circuit schematic diagram of a unidirectional isolation module according to an exemplary embodiment of the present disclosure; Figure 4 This is a circuit schematic diagram of the first discharge module according to an exemplary embodiment of this disclosure; Figure 5 This is a circuit diagram of the second discharge module, which is an exemplary embodiment of this disclosure.

[0018] Explanation of icon numbers: V1, first driving voltage; V2, second driving voltage; Coil, coil; G1, First switching device; G2, Second switching device; G3, Third switching device; G4, the fourth switching device; G5, the fifth switching device; G6, the sixth switching device; U1, first optocoupler; U2, second optocoupler; U3, third optocoupler; U4, fourth optocoupler; U5, fifth optocoupler; U6, sixth optocoupler; Q1, first transistor; Q2, second transistor; Q3, third transistor; Q4, fourth transistor; Q5, fifth transistor; Q6, sixth transistor; Q7, seventh transistor; Q8, eighth transistor; Q9, the ninth transistor; Q10, the thirteenth transistor; Q11, the eleventh transistor; Q12, the twelfth transistor; D1, the first diode; D2, the second diode; D3, the third diode; D4, the fourth diode; D5, the fifth diode; C_HZ, closing energy storage capacitor; C_FZ, opening energy storage capacitor; R1, the first resistor; R2, the second resistor; R3, the third resistor; R4, the fourth resistor; R5, the fifth resistor; R6, the sixth resistor; R7, the seventh resistor; R8, the eighth resistor; R9, the ninth resistor; R10, the tenth resistor; R11, the eleventh resistor; R12, the twelfth resistor; R13, the thirteenth resistor; R14, the fourteenth resistor; R15, the fifteenth resistor; R16, the sixteenth resistor; R17, the seventeenth resistor; R18, the eighteenth resistor; R19, the nineteenth resistor; R20, the twentieth resistor; R21, the twenty-first resistor; R22, the twenty-second resistor; R23, the twenty-third resistor; R24, the 24th resistor; R25, the 25th resistor; R26, the 26th resistor; R27, the twenty-seventh resistor; R28, the twenty-eighth resistor; R29, the twenty-ninth resistor; R30, the thirtieth resistor; R31, the thirty-first resistor; R32, the thirty-second resistor; R33, the thirty-third resistor; R34, the thirty-fourth resistor; R35, the thirty-fifth resistor; R36, the thirty-sixth resistor; R37, the thirty-seventh resistor; R38, the thirty-eighth resistor; R39, the thirty-ninth resistor; R40, the fortieth resistor.

[0019] The realization of the objectives, functional features and advantages of the embodiments of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, the use of suffixes such as "module," "component," or "unit" to denote elements is merely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "component," or "unit" can be used interchangeably. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0024] First, based on the content described in the background section, the background of this application will be further elaborated.

[0025] With the widespread adoption of integrated primary and secondary equipment, in order to promote the intelligent upgrading of power distribution equipment, improve the quality of equipment, streamline equipment types, select high-reliability equipment, and actively adopt new technologies, new equipment, new materials, and new processes, we can improve the digitalization, integration, standardization, and modularization of power distribution equipment.

[0026] The magnetic control mechanism uses semi-hard magnetic memory alloy material, which, compared to permanent magnet mechanisms, mechanical springs, or electromagnetic mechanisms, offers simpler assembly, faster operation, lower power consumption, longer lifespan, and higher reliability. Therefore, the new primary and secondary deeply integrated magnetic control mechanism boasts advantages such as miniaturization, high reliability, rapid operation, and maintenance-free operation. It effectively solves the problems of spring mechanism switches failing to open, close, or store energy due to mechanical issues, thus avoiding problems such as cascading tripping and expanded power outage areas, and improving the intelligence and digitalization level of the power distribution network.

[0027] In related technologies, the control devices for magnetic control mechanisms are mostly independent modules, which are large in size and consume a lot of power, making them difficult to integrate into the feeder terminal. Some control devices use independent driver chips, but these have shortcomings in stability and safety, easily leading to single-arm conduction, causing instantaneous high current damage to the IGBTs (Insulated-Gate Bipolar Transistors) or MOS (Metal-Oxide-Semiconductor) transistors in the bridge arm. Furthermore, after the control device loses power, the high-voltage energy storage capacitor in the control device lacks a discharge circuit, resulting in prolonged high voltage, which affects the safety of maintenance. Finally, the control device does not differentiate between the opening and closing energy storage capacitors; excessive closing power consumption can lead to excessive energy discharge from the energy storage capacitor, while insufficient energy storage occurs during opening.

[0028] Based on this, embodiments of this application propose a driving circuit and a magnetic control mechanism.

[0029] Firstly, referring to Figure 1 The drive circuit of the magnetic control mechanism may include a full-bridge module, a first control module, a second control module and an interlock module. The full-bridge module includes a first bridge arm and a second bridge arm. The coil of the magnetic control mechanism is connected between the midpoint of the first bridge arm and the midpoint of the second bridge arm.

[0030] The first control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain the first control signal according to the first action command, so as to control the first bridge arm and the second bridge arm to conduct in the first conduction path.

[0031] The second control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain the second control signal according to the second action command, so as to control the first bridge arm and the second bridge arm to conduct in the second conduction path.

[0032] An interlocking module is connected to a first control module and a second control module respectively. It is used to obtain a first interlocking signal according to a first control signal and output the first interlocking signal to the second control module so that the second control module controls the second conduction path to disconnect according to the first interlocking signal. It is also used to obtain a second interlocking signal according to a second control signal and output the second interlocking signal to the first control module so that the first control module controls the second conduction path to disconnect according to the second interlocking signal.

[0033] In this embodiment, as Figure 1As shown, the first bridge arm of the full-bridge module may include a first switching device G1 and a second switching device G2, and the second bridge arm may include a third switching device G3 and a fourth switching device G4. The first switching device G1 may include an input terminal for receiving a first driving voltage V1, an output terminal connected to the input terminal of the second switching device G2 and the first input terminal CKXQ_A of the coil, and a control terminal connected to the first control module. The second switching device G2 also includes a control terminal connected to the second control module and a grounded output terminal. The third switching device G3 includes an input terminal for receiving a second driving voltage V2, an output terminal connected to the input terminal of the fourth switching device G4 and the second input terminal CKXQ_B of the coil, and a control terminal connected to the second control module. The fourth switching device G4 also includes a control terminal connected to the first control module and a grounded output terminal.

[0034] In specific implementation, when the first control module controls the first bridge arm and the second bridge arm to conduct along the first conduction path, it controls the first switching device G1 and the fourth switching device G4 to conduct. The first driving voltage V1 passes through the first switching device G1, through the coil Coil, and through the fourth switching device G4 to ground, causing the coil Coil to conduct in the first direction. When the second control module controls the first bridge arm and the second bridge arm to conduct along the second conduction path, it controls the second switching device G2 and the third switching device G3 to conduct. The second driving voltage V2 passes through the third switching device G3, through the coil Coil, and through the second switching device G2 to ground, causing the coil Coil to conduct in the second direction. Wherein, when the first driving voltage V1 is the closing voltage VH_HZ, the second driving voltage V2 is the opening voltage VH_FZ; conversely, when the first driving voltage V1 is the opening voltage VH_FZ, the second driving voltage V2 is the closing voltage VH_HZ. Correspondingly, when the first action command is a closing signal YKHZ and the second action command is a opening signal YKFZ, the first control module is a closing control module, used to control the first and second bridge arms to conduct along the first conduction path, and the magnetic control mechanism performs the closing action; the second control module is an opening control module, used to control the first and second bridge arms to conduct along the second conduction path, and the magnetic control mechanism performs the opening action. Conversely, when the first action command is an opening signal YKFZ and the second action command is a closing signal YKHZ, when the first control module is an opening control module, it is used to control the first and second bridge arms to conduct along the first conduction path, and the magnetic control mechanism performs the opening action; when the second control module is a closing control module, it is used to control the first and second bridge arms to conduct along the second conduction path, and the magnetic control mechanism performs the closing action. The closing voltage VH_HZ can be a positive voltage, and the opening voltage VH_FZ can be a negative voltage. The closing voltage VH_HZ and the opening voltage VH_FZ can be provided by the same power supply system. The first switching device G1, the second switching device G2, the third switching device G3, and the fourth switching device G4 can be IGBTs or NPN channel MOSFETs. The following embodiments are illustrated using IGBTs as examples. The collector-emitter voltage VCE of the IGBT is greater than VH_HZ, and the maximum collector current ICmax of the IGBT is greater than ICoil, where ICoil is the operating current of the coil Coil of the magnetic control mechanism.

[0035] In this embodiment, when the interlock module receives the first control signal, it outputs a first latching signal to the second control module, causing the second control module to control the second switching device G2 and the third switching device G3 to turn off according to the first latching signal, thus locking the second conduction path of the first bridge arm and the second bridge arm. When the interlock module receives the second control signal, it outputs a second latching signal to the first control module, causing the first control module to control the first switching device G1 and the fourth switching device G4 to turn off according to the second latching signal, thus locking the first conduction path of the first bridge arm and the second bridge arm. Therefore, when the drive circuit drives the magnetic control mechanism, the full-bridge module will not experience a single bridge arm conduction situation, thereby preventing damage to the switching devices in the full-bridge module due to a large instantaneous current flow and improving the reliability of the drive circuit of the magnetic control mechanism.

[0036] In some embodiments, refer to Figure 2 The interlock module may include a first transistor Q1, a first optocoupler U1, a second transistor Q2, and a second optocoupler U2.

[0037] The first transistor Q1 may include a base connected to the second control module to receive a second control signal, a collector connected to the first control module, and a grounded emitter.

[0038] The first optocoupler U1 may include an anode connected to the second control module to receive a second control signal, a grounded cathode, a collector connected to the first control module, and a grounded emitter.

[0039] The second transistor Q2 may include a base connected to the first control module to receive a first control signal, a collector connected to the second control module, and a grounded emitter.

[0040] The second optocoupler U2 may include an anode connected to the first control module to receive a first control signal, a grounded cathode, a collector connected to the second control module, and a grounded emitter.

[0041] In this embodiment, the first latching signal may include a first latching sub-signal BSHZ and a second latching sub-signal. When the base of the second transistor Q2 receives the first control signal, the second transistor Q2 is turned on, and the first latching sub-signal BSHZ is output to the second control module through the collector, so that the second control module controls the second switching device G2 to turn off. When the anode of the second optocoupler U2 receives the first control signal, the phototransistor in the second optocoupler U2 is turned on, and the second latching sub-signal is output to the second control module through the collector of the phototransistor, so that the second control module controls the third switching device G3 to turn off.

[0042] The second latching signal may include a third latching sub-signal BSFZ and a fourth latching sub-signal. When the base of the first transistor Q1 receives the second control signal, the first transistor Q1 is turned on, and the third latching sub-signal BSFZ is output to the first control module through the collector, so that the first control module controls the fourth switching device G4 to turn off. When the anode of the first optocoupler U1 receives the second control signal, the phototransistor in the first optocoupler U1 is turned on, and the fourth latching sub-signal is output to the first control module through the collector of the phototransistor, so that the first control module controls the first switching device G1 to turn off.

[0043] Additionally, the interlock module may include a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a sixteenth resistor R16. The thirteenth resistor R13 is connected between the base of the first transistor Q1 and the second control module to limit the base current of the first transistor Q1. The fourteenth resistor R14 is connected between the anode of the first optocoupler U1 and the second control module to limit the anode current of the first optocoupler U1. The fifteenth resistor R15 is connected between the base of the second transistor Q2 and the first control module to limit the base current of the second transistor Q2. The sixteenth resistor R16 is connected between the anode of the second optocoupler U2 and the first control module to limit the anode current of the second optocoupler U2.

[0044] In some embodiments, refer to Figure 2 The first control module may include a third optocoupler U3, a third transistor Q3, a fourth transistor Q4, a fourth optocoupler U4, a fifth transistor Q5, and a sixth transistor Q6. The second control module may include a fifth optocoupler U5, a seventh transistor Q7, an eighth transistor Q8, a sixth optocoupler U6, a ninth transistor Q9, and a thirteenth transistor Q10.

[0045] The third optocoupler U3 may include a cathode for receiving a first action command, an emitter connected to the base of the third transistor Q3 and the base of the fourth transistor Q4, an anode and a collector connected to a power supply; the emitter of the third transistor Q3, the emitter of the fourth transistor Q4 and the control terminal of the first switching device G1 are connected to a first connection point; the collector of the third transistor Q3 is connected to the power supply, and the collector of the fourth transistor Q4 is grounded.

[0046] The fourth optocoupler U4 may include a cathode for receiving a first action command, an emitter connected to the base of the fifth transistor Q5 and the base of the sixth transistor Q6, an anode and a collector connected to a power supply; the emitters of the fifth transistor Q5 and the sixth transistor Q6 and the control terminal of the fourth switching device G4 are connected to a second connection point; the collector of the fifth transistor Q5 is connected to the power supply, and the collector of the sixth transistor Q6 is grounded.

[0047] The fifth optocoupler U5 may include a cathode for receiving a second action command, an emitter connected to the base of the seventh transistor Q7 and the base of the eighth transistor Q8, an anode and a collector connected to a power supply; the emitters of the seventh transistor Q7 and the eighth transistor Q8 and the control terminal of the third switching device G3 are connected to a third connection point; the collector of the seventh transistor Q7 is connected to the power supply, and the collector of the eighth transistor Q8 is grounded.

[0048] The sixth optocoupler U6 may include a cathode for receiving a second action command, an emitter connected to the base of the ninth transistor Q9 and the base of the thirteenth transistor Q10, an anode and a collector connected to a power supply; the emitters of the ninth transistor Q9 and the thirteenth transistor Q10, and the control terminal of the second switching device G2 are connected to a fourth connection point; the collector of the ninth transistor Q9 is connected to the power supply, and the collector of the thirteenth transistor Q10 is grounded.

[0049] In this embodiment, the third transistor Q3, the fifth transistor Q5, the seventh transistor Q7, and the ninth transistor Q9 can be NPN transistors, and the fourth transistor Q4, the sixth transistor Q6, the eighth transistor Q8, and the thirteenth transistor Q10 can be PNP transistors. The power supply may include at least one isolated power supply. Preferably, the power supply includes isolated power supply VCC1, isolated power supply VCC2, and isolated power supply VCC3, with GND1 as the ground of isolated power supply VCC1, GND2 as the ground of isolated power supply VCC2, and CAP_GND as the ground of isolated power supply VCC3. Isolation power supply VCC1 provides drive voltage for the third transistor Q3 and the phototransistor in the third optocoupler U3; isolation power supply VCC2 provides drive voltage for the seventh transistor Q7 and the phototransistor in the fifth optocoupler U5; and isolation power supply VCC3 provides drive voltage for the fifth transistor Q5, the phototransistor in the fourth optocoupler U4, the ninth transistor Q9, and the phototransistor in the sixth optocoupler U6. The +5V supply voltage can be generated by isolation power supplies VCC1, VCC2, and VCC3 respectively. Both the first and second action commands are active low.

[0050] Furthermore, the first control module may also include a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, and a twentieth resistor R20; the second control module may also include a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, and a twenty-fourth resistor R24. The seventeenth resistor R17 is connected between the power supply and the cathode of the third optocoupler U3; the eighteenth resistor R18 is connected between the power supply and the anode of the third optocoupler U3; the nineteenth resistor R19 is connected between the power supply and the cathode of the fourth optocoupler U4; the twentieth resistor R20 is connected between the power supply and the anode of the fourth optocoupler U4; the twenty-first resistor R21 is connected between the power supply and the cathode of the fifth optocoupler U5; the twenty-second resistor R22 is connected between the power supply and the anode of the fifth optocoupler U5; the twenty-third resistor R23 is connected between the power supply and the cathode of the sixth optocoupler U6; and the twenty-fourth resistor R24 ​​is connected between the power supply and the anode of the sixth optocoupler U6. Resistors R17 (17th), R18 (18th), R19 (19th), R20 (20th), R21 (21st), R22 (22nd), R23 (23rd), and R24 (24th) are pull-up resistors. When the first and second control commands are in an indeterminate state, they keep the primary-side LEDs of the third optocoupler U3, the fourth optocoupler U4, the fifth optocoupler U5, and the sixth optocoupler U6 in a fixed non-conducting state, preventing the first switching device G1, the second switching device G2, the third switching device G3, and the fourth switching device G4 from conducting simultaneously.

[0051] Additionally, the first control module may also include a 25th resistor R25, a 26th resistor R26, a 27th resistor R27, and a 28th resistor R28. The 25th resistor R25 is connected between the collector of the third optocoupler U3 and the power supply, and the 26th resistor R26 is connected between the emitter of the third optocoupler U3 and ground GND1. When the phototransistor of the third optocoupler U3 is turned on, the 25th resistor R25 limits the collector current of the third optocoupler U3, and the 26th resistor R26 divides the output voltage of the power supply, controlling the third transistor Q3 to turn on. The twenty-seventh resistor R27 is connected between the emitter of the fourth optocoupler U4 and the base of the fifth transistor Q5, and the twenty-eighth resistor R28 is connected between the emitter of the fourth optocoupler U4 and ground GAP_GND. When the phototransistor of the fourth optocoupler U4 is turned on, the twenty-seventh resistor R27 is used to limit the emitter current of the fourth optocoupler U4, and the twenty-eighth resistor R28 divides the output voltage of the power supply to control the fifth transistor Q5 to turn on.

[0052] The first control module may further include a thirty-third resistor R33 connected between the first connection point and the control terminal of the first switching device G1, for limiting the current at the control terminal of the first switching device G1, and a thirty-fourth resistor R34 connected between the second connection point and the control terminal of the fourth switching device G4, for limiting the current at the control terminal of the fourth switching device G4.

[0053] The first control module may further include a 35th resistor R35 and a 36th resistor R36. The 35th resistor R35 is connected between the control terminal of the first switching device G1 and ground GND1, and the 36th resistor R36 is connected between the control terminal of the fourth switching device G4 and ground GAP_GND. When the third transistor Q3 is turned on, the 35th resistor R35 divides the output voltage of the power supply, controlling the first switching device G1 to turn on. When the fifth transistor Q5 is turned on, the 36th resistor R36 divides the output voltage of the power supply, controlling the fourth switching device G4 to turn on. The 35th resistor R35 and the 36th resistor R36 are pull-down resistors, ensuring that the first switching device G1 and the fourth switching device G4 are effectively turned off when the third transistor Q3 and the fifth transistor Q5 are not turned on.

[0054] The second control module may also include a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, and a thirty-second resistor R32. The twenty-ninth resistor R29 is connected between the collector of the fifth optocoupler U5 and the power supply, and the thirtieth resistor R30 is connected between the emitter of the fifth optocoupler U5 and ground GND2. When the phototransistor of the fifth optocoupler U5 is turned on, the twenty-ninth resistor R29 limits the collector current of the fifth optocoupler U5, and the thirtieth resistor R30 divides the output voltage of the power supply, controlling the seventh transistor Q7 to turn on. The thirty-first resistor R31 is connected between the emitter of the sixth optocoupler U6 and the base of the ninth transistor Q9. The thirty-second resistor R32 is connected between the emitter of the sixth optocoupler U6 and ground GAP_GND. When the phototransistor of the sixth optocoupler U6 is turned on, the twenty-ninth resistor R29 is used to limit the emitter current of the sixth optocoupler U6, and the thirty-second resistor R32 divides the output voltage of the power supply to control the ninth transistor Q9 to turn on.

[0055] In this context, the base-emitter voltage VGEQ9 of the ninth transistor Q9 is equal to (r32 / (r31+r32)) × VCC3, where r32 is the resistance of the thirty-second resistor R32, and r31 is the resistance of the thirty-first resistor R31. The ninth transistor Q9, the twenty-fourth resistor R24, the sixth optocoupler U6, the thirty-first resistor R31, and the thirty-second resistor R32 satisfy the constraint: (5 / r24) × CTR(U6) > ((VCC3 / (r31+r32)) + IGQ9), where CTR(U6) is the transmission ratio of the sixth optocoupler U6, IGQ9 is the base current of the ninth transistor Q9, and r24 is the resistance of the twenty-fourth resistor R24. The base-emitter voltage VGEQ9 of the ninth transistor Q9 satisfies the constraint: VGEQ9 = (r32 / (r31+r32)) × VCC3 < (VCC3-VCEQ9). The emitter voltage VEQ9 of the transistor satisfies the constraint: VEQ9 * (r38 / (r40+r38)) > VGEG2, where r38 is the resistance of the thirty-eighth resistor R38, r40 is the resistance of the fortieth resistor, and VGEG2 is the gate-emitter voltage of the second switching device G2. The resistance values ​​r14 of the fourteenth resistor R14 and r25 of the twenty-fifth resistor R25 satisfy the constraint: (VCC3 / r14) × CTR(U1) > (VCC1 / r25), where CTR(U1) is the transmission ratio of the first optocoupler U1. It can be understood that the constraints of other components in the first control module, the second control module, and the interlocking module can be determined similarly.

[0056] The second control module may further include a 37th resistor R37 and a 38th resistor R38. The 37th resistor R37 is connected between the control terminal of the second switching device G2 and ground GND1, and the 38th resistor R38 is connected between the control terminal of the third switching device G3 and ground GAP_GND. When the seventh transistor Q7 is turned on, the output voltage of the power supply is divided by the 37th resistor R37, controlling the second switching device G2 to turn on; when the seventh transistor Q7 is turned on, the output voltage of the power supply is divided by the 38th resistor R38, controlling the third switching device G3 to turn on. The 37th and 38th resistors R37 and R38 are pull-down resistors, ensuring that the second switching device G2 and the third switching device G3 are effectively turned off when the seventh transistor Q7 and the ninth transistor Q9 are not turned on.

[0057] The second control module may further include a thirty-ninth resistor R39 connected between the third connection point and the control terminal of the third switching device G3, for limiting the current at the control terminal of the third switching device G3, and a fortieth resistor R40 connected between the fourth connection point and the control terminal of the second switching device G2, for limiting the current at the control terminal of the second switching device G2.

[0058] Furthermore, the first control signal may include a first control sub-signal, a second control sub-signal, and a third control sub-signal, and the second control signal may include a fourth control sub-signal, a fifth control sub-signal, and a sixth control sub-signal.

[0059] For example, such as Figure 2 As shown, the first action command is the closing signal YKHZ, and the second action command is the opening signal YKFZ. When the drive circuit receives a low-level closing signal YKHZ, the LED in the third optocoupler U3 is connected to a +5V voltage and conducts, controlling the phototransistor in the third optocoupler U3 to conduct. This outputs a first control sub-signal, controlling the third transistor Q3 to conduct, thereby controlling the first switching device G1 to conduct. Similarly, the LED in the fourth optocoupler U4 is connected to a +5V voltage and conducts, controlling the phototransistor in the fourth optocoupler U4 to conduct. This outputs a second control sub-signal, controlling the fifth transistor Q5 to conduct, thereby controlling the fourth switching device G4 to conduct. A third control sub-signal is also output to control the second transistor Q2 and the second optocoupler U2 to conduct. Through the second transistor Q2, the base voltage of the ninth transistor Q9 is pulled low to GAP_GND, thereby controlling the second switching device G2 to be latched off. Through the phototransistor in the second optocoupler U2, the base voltage of the seventh transistor Q7 is pulled low to GND2, thereby controlling the third switching device G3 to be latched off. When the drive circuit receives a low-level trip signal YKFZ, the LED in the fifth optocoupler U5 is connected to a +5V voltage and conducts, controlling the phototransistor in the fifth optocoupler U5 to conduct. This outputs a fourth control sub-signal, controlling the seventh transistor Q7 to conduct, thereby controlling the third switching device G3 to conduct. Similarly, the LED in the sixth optocoupler U6 is connected to a +5V voltage and conducts, controlling the phototransistor in the sixth optocoupler U6 to conduct. This outputs a fifth control sub-signal, controlling the ninth transistor Q9 to conduct, thereby controlling the second switching device G2 to conduct. The sixth control sub-signal then controls the first transistor Q1 and the first optocoupler U1 to conduct. Through the first transistor Q1, the base voltage of the fifth transistor Q5 is pulled low to GAP_GND, controlling the fourth switching device G4 to be latched off. Through the phototransistor in the first optocoupler U1, the base voltage of the third transistor Q3 is pulled low to GND1, thereby controlling the first switching device G1 to be latched off.

[0060] Furthermore, the driving circuit may also include a first voltage release module connected between the control terminal of the first switching device G1 and the first connection point and used to release the control voltage of the first switching device G1.

[0061] The first voltage release module may include a first diode D1, the anode of the first diode D1 is connected to the control terminal of the first switching device G1, and the cathode of the first diode D1 is connected to the first connection point.

[0062] In this embodiment, when the first action command changes from low to high and the second action command changes from high to low, the light-emitting diode in the third optocoupler U3 turns off, simultaneously turning off the phototransistor in the third optocoupler U3. At this time, the base voltage VGE of the third transistor Q3 is 0V, and the third transistor Q3 is simultaneously turned off. However, the base voltage of the first switching device G1 does not immediately become zero. Therefore, the base voltage of the first switching device G1 can be released in time through the fourth transistor Q4 by the first voltage release module, so as to turn off the first switching device G1 in time and avoid the first switching device G1 and the third switching device G3 from being turned on at the same time. Specifically, the first voltage release module can connect the first diode D1 across the two ends of the first resistor R1, and use the low impedance characteristics of the first diode D1 to provide a fast release voltage condition for the control terminal of the first switching device G1.

[0063] Similarly, the driving circuit may also include a second voltage release module connected between the control terminal and the second connection point of the fourth switching device G4, used to release the control voltage of the fourth switching device G4. The second voltage release module includes a second diode D2, the anode of which is connected to the control terminal of the second switching device G2, and the cathode of which is connected to the second connection point. By setting the second diode D2, a rapid release voltage condition can be provided to the control terminal of the second switching device G2.

[0064] The driving circuit may further include a third voltage release module connected between the control terminal of the third switching device G3 and the third connection point, used to release the control voltage of the third switching device G3. The third voltage release module includes a fourth diode D4, the anode of which is connected to the control terminal of the third switching device G3, and the cathode of which is connected to the third connection point. By providing the fourth diode D4, a rapid release voltage condition can be provided to the control terminal of the third switching device G3.

[0065] The driving circuit may further include a fourth voltage release module connected between the control terminal of the second switching device G2 and the fourth connection point, used to release the control voltage of the second switching device G2. The fourth voltage release module includes a third diode D3, the anode of which is connected to the control terminal of the second switching device G2, and the cathode of which is connected to the fourth connection point. By setting the third diode D3, a rapid release voltage condition can be provided to the control terminal of the second switching device G2.

[0066] In some embodiments, the first switching device G1 may include an input terminal connected to a first end of the first energy storage capacitor, an output terminal connected to a first input terminal of the coil, and a control terminal connected to the first control module, with the second end of the first energy storage capacitor grounded; the second switching device G2 may include an input terminal connected to the first input terminal of the coil, a grounded output terminal, and a control terminal connected to the second control module; the third switching device G3 may include an input terminal connected to the first end of the second energy storage capacitor, an output terminal connected to the second input terminal of the coil, and a control terminal connected to the second control module, with the second end of the second energy storage capacitor grounded; the fourth switching device G4 may include an input terminal connected to the second input terminal of the coil, a grounded output terminal, and a control terminal connected to the first control module.

[0067] In this embodiment, the first driving voltage V1 is provided by the first energy storage capacitor, and the second driving voltage V2 is provided by the second energy storage capacitor. This distinguishes between the closing energy storage capacitor C_HZ and the opening energy storage capacitor C_FZ, effectively preventing excessive closing power consumption and excessive energy dissipation from the energy storage capacitor, which could lead to insufficient energy storage during opening.

[0068] For example, such as Figure 3 As shown, the closing voltage VH_HZ can be provided by the closing energy storage capacitor C_HZ, and the opening voltage VH_FZ can be provided by the opening energy storage capacitor C_FZ. The capacity of the closing energy storage capacitor C_HZ meets the closing energy requirement, and the capacity of the opening energy storage capacitor C_FZ meets the opening energy requirement.

[0069] In some embodiments, the driving circuit may further include a unidirectional isolation module disposed between the first energy storage capacitor and the second energy storage capacitor; the unidirectional isolation module is used to control unidirectional conduction between the second energy storage capacitor and the first energy storage capacitor. The unidirectional isolation module may include a fifth diode D5; the anode of the fifth diode D5 is connected to the first terminal of the first energy storage capacitor, and the cathode is connected to the first terminal of the second energy storage capacitor.

[0070] In this embodiment, when the first energy storage capacitor is used as the closing energy storage capacitor C_HZ and the second energy storage capacitor is used as the opening energy storage capacitor C_FZ, a unidirectional isolation module can be used to control the unidirectional conduction between the first and second energy storage capacitors to ensure that closing does not affect the energy storage of the opening energy storage capacitor. Similarly, when the second energy storage capacitor is used as the closing energy storage capacitor C_HZ and the first energy storage capacitor is used as the opening energy storage capacitor C_FZ, the unidirectional isolation module can be used to control the unidirectional conduction between the second and first energy storage capacitors to ensure that closing does not affect the energy storage of the opening energy storage capacitor. Therefore, when the magnetic control mechanism is closed, the energy storage of the opening energy storage capacitor C_FZ is not affected by the closing action, ensuring that the energy storage of the opening energy storage capacitor C_FZ meets the opening requirements.

[0071] Furthermore, the unidirectional conduction module can be implemented using a fifth diode, D5. For example, refer to... Figure 3 The anode of the fifth diode D5 is connected to the first terminal of the closing energy storage capacitor C_HZ, and the cathode of the fifth diode D5 is connected to the first terminal of the opening energy storage capacitor C_FZ.

[0072] In some embodiments, the driving circuit may further include a first discharge module connected to a first energy storage capacitor and a second discharge module connected to a second energy storage capacitor.

[0073] The first discharge module is used to discharge the first driving voltage V1 of the first energy storage capacitor to a safe voltage.

[0074] The second discharge module is used to discharge the second driving voltage V2 of the second energy storage capacitor to a safe voltage.

[0075] In this embodiment, by setting a first discharge module to discharge the first driving voltage V1 of the first energy storage capacitor and setting a second discharge module to discharge the second driving voltage V2 of the second energy storage capacitor, it can be ensured that both the first driving voltage V1 and the second driving voltage V2 are within the safe voltage range, thereby avoiding the risk of high voltage electric shock caused by excessively high first driving voltage V1 and second driving voltage V2, and ensuring the safety of the overall driving circuit.

[0076] Furthermore, referring to Figure 4 and Figure 5 The first discharge module may include the eleventh transistor Q11 and the fifth switching device G5, and the second discharge module may include the twelfth transistor Q12 and the sixth switching device G6.

[0077] The eleventh transistor Q11 includes a base connected to the common junction of a first resistor R1 and a second resistor R2 connected in series, a collector connected to the common junction of a third resistor R3 and a fourth resistor R4 connected in series, and a grounded emitter. The first end of the first resistor R1 and the second resistor R2 connected in series is connected to the power supply, and the second end is grounded. The first end of the third resistor R3 and the fourth resistor R4 connected in series is connected to the first energy storage capacitor, and the second end is grounded. The fifth switching device G5 includes an input terminal connected to the first end of the fifth resistor R5, a control terminal connected to the collector of the eleventh transistor Q11, and a grounded output terminal. The second end of the fifth resistor R5 is connected to the first energy storage capacitor. The twelfth transistor Q12 includes a base connected to the common junction of the sixth resistor R6 and the seventh resistor R7 connected in series, a collector connected to the common junction of the eighth resistor R8 and the ninth resistor R9 connected in series, and a grounded emitter. The first end of the sixth resistor R6 and the seventh resistor R7 connected in series is connected to the power supply, and the second end is grounded. The first end of the eighth resistor R8 and the ninth resistor R9 connected in series is connected to the second energy storage capacitor, and the second end is grounded. The sixth switching device G6 includes an input terminal connected to the first end of the tenth resistor R10, a control terminal connected to the collector of the twelfth transistor Q12, and a grounded output terminal. The second end of the tenth resistor R10 is connected to the second energy storage capacitor.

[0078] In this embodiment, the first terminals of the first resistor R1 and the second resistor R2, which are connected in series, are connected to the isolation power supply VCC3. The first terminals of the third resistor R3 and the fourth resistor R4, which are also connected in series, are connected to the isolation power supply VCC3. The eleventh transistor Q11 and the twelfth transistor can be NPN transistors, and the fifth switching device G5 and the sixth switching device can be NPN MOSFETs. When the isolation power supply VCC3 is energized, the entire driving circuit is energized. After the output voltage of the isolation power supply VCC3 is divided by the first resistor R1 and the second resistor R2, the eleventh transistor Q11 is enabled. The eleventh transistor Q11 is turned on, making the base voltage VBSG5 of the fifth switching device G5 0V. The fifth switching device G5 is turned off, and the first driving voltage V1 of the first energy storage capacitor is discharged through the third resistor R3 and the fourth resistor R4. Similarly, the second driving voltage V2 of the second energy storage capacitor can be discharged through the eighth resistor R8 and the ninth resistor R9. When the isolation power supply VCC3 loses power, the first driving voltage V1 is divided by the third resistor R3 and the fourth resistor R4, which enables the fifth switching device G5. The first driving voltage V1 of the first energy storage capacitor is discharged through the fifth resistor R5. Similarly, the second driving voltage V2 of the second energy storage capacitor can be discharged through the tenth resistor R10. When the isolation power supply VCC3 is energized, the resistance values ​​r1 of the first resistor R1 and r2 of the second resistor R2 satisfy the constraint: VCC3×(r2 / (r1+r2))>VBEQ11. The resistance values ​​r3 of the third resistor R3 and r4 of the fourth resistor R4 satisfy the constraint: VH_FZ / (r3+r4)<10mA. When the isolation power supply VCC3 is de-energized, the discharge time T of the first discharge module satisfies the constraint T=r5×(c1+c2)×ln(VH_FZ / VT), where VT is the safety voltage, VBEQ11 is the base-emitter voltage of the eleventh transistor Q11, c1 is the capacitance value of the first energy storage capacitor, and c2 is the capacitance value of the second energy storage capacitor.

[0079] In some embodiments, the drive circuit may further include an eleventh resistor R11 and a twelfth resistor R12.

[0080] The eleventh resistor R11 includes a first terminal connected to the first input terminal of the coil Coil, and a second terminal grounded.

[0081] The twelfth resistor R12 includes a first terminal connected to the second input terminal of the coil Coil, and a second terminal grounded.

[0082] In this embodiment, the eleventh resistor R11 and the twelfth resistor R12 are both pull-down resistors, used to ensure that the coil is normally grounded, to ensure the stability of the coil, and to enhance the anti-interference capability of the drive circuit.

[0083] This application also proposes a magnetic control mechanism, which includes a drive circuit as described in any of the above embodiments. The specific structure of the drive circuit is as described in the above embodiments. Since the magnetic control mechanism adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0084] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A drive circuit for a magnetically controlled mechanism, characterized in that, It includes a full-bridge module, a first control module, a second control module, and an interlock module. The full-bridge module includes a first bridge arm and a second bridge arm. The coil of the magnetic control mechanism is connected between the midpoint of the first bridge arm and the midpoint of the second bridge arm. The first control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain a first control signal according to the first action command, so as to control the first bridge arm and the second bridge arm to conduct in a first conduction path; The second control module is connected to the first bridge arm and the second bridge arm respectively, and is used to obtain a second control signal according to the second action command, so as to control the first bridge arm and the second bridge arm to conduct in the second conduction path; The interlocking module is connected to the first control module and the second control module respectively. It is used to obtain a first interlocking signal according to the first control signal and output the first interlocking signal to the second control module so that the second control module controls the second conduction path to disconnect according to the first interlocking signal. It is also used to obtain a second interlocking signal according to the second control signal and output the second interlocking signal to the first control module so that the first control module controls the second conduction path to disconnect according to the second interlocking signal.

2. The driving circuit of the magnetic control mechanism according to claim 1, characterized in that, The interlock module includes a first transistor, a first optocoupler, a second transistor, and a second optocoupler; The first transistor includes a base connected to the second control module to receive the second control signal, a collector connected to the first control module, and a grounded emitter; The first optocoupler includes an anode connected to the second control module to receive the second control signal, a grounded cathode, a collector connected to the first control module, and a grounded emitter; The second transistor includes a base connected to the first control module to receive the first control signal, a collector connected to the second control module, and a grounded emitter. The second optocoupler includes an anode connected to the first control module to receive the first control signal, a grounded cathode, a collector connected to the second control module, and a grounded emitter.

3. The driving circuit of the magnetic control mechanism according to claim 2, characterized in that, The first bridge arm includes a first switching device and a second switching device, and the second bridge arm includes a third switching device and a fourth switching device; The first switching device includes an input terminal connected to a first end of a first energy storage capacitor, an output terminal connected to a first input terminal of the coil, a control terminal connected to the first control module, and a second end of the first energy storage capacitor grounded. The second switching device includes an input terminal connected to the first input terminal of the coil, a grounded output terminal, and a control terminal connected to the second control module; The third switching device includes an input terminal connected to a first terminal of the second energy storage capacitor, an output terminal connected to a second input terminal of the coil, a control terminal connected to the second control module, and the second terminal of the second energy storage capacitor is grounded. The fourth switching device includes an input terminal connected to the second input terminal of the coil, a grounded output terminal, and a control terminal connected to the first control module.

4. The driving circuit of the magnetic control mechanism according to claim 3, characterized in that, The first control module includes a third optocoupler, a third transistor, a fourth transistor, a fourth optocoupler, a fifth transistor, and a sixth transistor; the second control module includes a fifth optocoupler, a seventh transistor, an eighth transistor, a sixth optocoupler, a ninth transistor, and a thirteenth transistor. The third optocoupler includes a cathode for receiving the first action command, an emitter connected to the base of the third transistor and the base of the fourth transistor, an anode and a collector connected to a power supply; the emitter of the third transistor, the emitter of the fourth transistor and the control terminal of the first switching device are connected to a first connection point; the collector of the third transistor is connected to the power supply, and the collector of the fourth transistor is grounded. The fourth optocoupler includes a cathode for receiving the first action command, an emitter connected to the base of the fifth transistor and the base of the sixth transistor, an anode and a collector connected to the power supply; the emitters of the fifth transistor and the sixth transistor and the control terminal of the fourth switching device are connected to a second connection point; the collector of the fifth transistor is connected to the power supply, and the collector of the sixth transistor is grounded; The fifth optocoupler includes a cathode for receiving the second action command, an emitter connected to the base of the seventh transistor and the base of the eighth transistor, an anode and a collector connected to the power supply; the emitters of the seventh transistor and the eighth transistor and the control terminal of the third switching device are connected to a third connection point; the collector of the seventh transistor is connected to the power supply, and the collector of the eighth transistor is grounded; The sixth optocoupler includes a cathode for receiving the second action command, an emitter connected to the base of the ninth transistor and the base of the thirteenth transistor, an anode and a collector connected to the power supply; the emitter of the ninth transistor, the emitter of the thirteenth transistor and the control terminal of the second switching device are connected to a fourth connection point; the collector of the ninth transistor is connected to the power supply, and the collector of the thirteenth transistor is grounded.

5. The driving circuit of the magnetic control mechanism according to claim 4, characterized in that, It also includes a first voltage release module connected between the control terminal of the first switching device and the first connection point and used to release the control voltage of the first switching device; The first voltage release module includes a first diode, the anode of the first diode is connected to the control terminal of the first switching device, and the cathode of the first diode is connected to the first connection point; And / or, The driving circuit further includes a second voltage release module connected between the control terminal of the fourth switching device and the second connection point and used to release the control voltage of the fourth switching device; The second voltage release module includes a second diode, the anode of the second diode is connected to the control terminal of the fourth switching device, and the cathode of the second diode is connected to the second connection point; And / or, The driving circuit further includes a third voltage release module connected between the control terminal of the third switching device and the third connection point and used to release the control voltage of the third switching device; The third voltage release module includes a fourth diode, the anode of which is connected to the control terminal of the third switching device, and the cathode of which is connected to the third connection point. And / or, The driving circuit further includes a fourth voltage release module connected between the control terminal of the second switching device and the fourth connection point and used to release the control voltage of the second switching device; The fourth voltage release module includes a third diode, the anode of which is connected to the control terminal of the second switching device, and the cathode of which is connected to the four connection points.

6. The driving circuit of the magnetic control mechanism according to claim 3, characterized in that, It also includes a unidirectional isolation module disposed between the first energy storage capacitor and the second energy storage capacitor; the unidirectional isolation module is used to control unidirectional conduction between the second energy storage capacitor and the first energy storage capacitor; wherein, the unidirectional isolation module includes a fifth diode; The anode of the fifth diode is connected to the first end of the first energy storage capacitor, and the cathode is connected to the first end of the second energy storage capacitor.

7. The driving circuit of the magnetic control mechanism according to claim 3, characterized in that, It also includes a first discharge module connected to the first energy storage capacitor and a second discharge module connected to the second energy storage capacitor; The first discharge module is used to discharge the first driving voltage of the first energy storage capacitor to a safe voltage. The second discharge module is used to discharge the second driving voltage of the second energy storage capacitor to a safe voltage.

8. The driving circuit of the magnetic control mechanism according to claim 7, characterized in that, The first discharge module includes an eleventh transistor and a fifth switching device, and the second discharge module includes a twelfth transistor and a sixth switching device; The eleventh transistor includes a base connected to the common junction of a first resistor and a second resistor connected in series, a collector connected to the common junction of a third resistor and a fourth resistor connected in series, and a grounded emitter. The first end of the first resistor and the second resistor connected in series are connected to a power supply, and the second end is grounded. The first end of the third resistor and the fourth resistor connected in series are connected to the first energy storage capacitor, and the second end is grounded. The fifth switching device includes an input terminal connected to the first end of a fifth resistor, a control terminal connected to the collector of the eleventh transistor, and a grounded output terminal. The second end of the fifth resistor is connected to the first energy storage capacitor. The twelfth transistor includes a base connected to the common junction of a sixth and seventh resistor connected in series, a collector connected to the common junction of an eighth and ninth resistor connected in series, and a grounded emitter. The first end of the sixth and seventh resistors connected in series is connected to a power supply, and the second end is grounded. The first end of the eighth and ninth resistors connected in series is connected to the second energy storage capacitor, and the second end is grounded. The sixth switching device includes an input terminal connected to the first end of a tenth resistor, a control terminal connected to the collector of the twelfth transistor, and a grounded output terminal. The second end of the tenth resistor is connected to the second energy storage capacitor.

9. The driving circuit of the magnetic control mechanism according to claim 3, characterized in that, It also includes the eleventh and twelfth resistors; The eleventh resistor includes a first end connected to the first input terminal of the coil and a second end grounded. The twelfth resistor includes a first terminal connected to the second input terminal of the coil and a second terminal grounded.

10. A magnetic control mechanism, characterized in that, The driving circuit includes the magnetic control mechanism as described in any one of claims 1 to 9.

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