Controllers and control devices

Abstract

The present application discloses a controller and a control device. In the circuit module of the controller, each device group is composed of only two transistors and two diodes connected together. The emitter of each transistor is connected to the cathode of a diode, the collector of the transistor is connected to the positive electrode of the controller's capacitor, and the anode of the diode is connected to the negative electrode of the capacitor. The collector of another transistor is connected to the anode of another diode, the emitter of the other transistor is connected to the negative electrode of the capacitor, and the cathode of the other diode is connected to the positive electrode of the capacitor. In each device group, a connection terminal connected to the phase winding of the motor corresponding to each device group is respectively provided between the transistor and the diode, which reduces the circuit volume of the controller and effectively saves the circuit cost of the controller. Only one IGBT can be used to package the circuit, thereby realizing a smaller and more compact controller.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a controller and a control device for a switched reluctance motor. Background Art

[0002] With the development of motor technology, motors have gradually evolved from devices that were initially only able to provide simple conversion between mechanical energy and electrical energy to devices that can provide characteristics such as higher torque and can adapt to a wider range of working scenarios. In recent years, switched reluctance motors that utilize rotor magnetic resistance have been proposed. Because they can use the uneven distribution of rotor magnetic resistance to generate the torque that drives the rotor to rotate, they are very different from existing AC and DC motors in terms of structure and operating principle. Therefore, they have the characteristics of simple structure, low cost, high speed, high reliability, large starting torque, low starting current, high efficiency, and low loss. They have gradually become the mainstream trend in the future new energy electric vehicles and construction machinery fields.

[0003] Motors typically require a supporting controller to implement drive control. This controller, for example, provides the motor with the required power and operating control signals. It also receives signals sensing the motor's operating status and generates corresponding control signals based on control logic. In the control scenario of a switched reluctance motor, the unique structure and principles of switched reluctance motors require specialized controller design. Therefore, a controller and control device suitable for use in new energy electric vehicles are needed. Summary of the Invention

[0004] The embodiments of the present application provide a controller and a control device to solve the defects of the controller and control device for the switched reluctance motor in the prior art, which are large in size and high in cost.

[0005] To achieve the above-mentioned object, an embodiment of the present application provides a controller for a switched reluctance motor, comprising: a circuit module and a first capacitor, wherein the circuit module comprises a first device group, a second device group, and a third device group.

[0006] The first device group is composed of a first transistor, a second transistor, and a first diode and a second diode. The emitter of the first transistor is connected to the cathode of the first diode, the collector of the first transistor is connected to the positive electrode of the first capacitor, the anode of the first diode is connected to the negative electrode of the first capacitor, the collector of the second transistor is connected to the anode of the second diode, the emitter of the second transistor is connected to the negative electrode of the first capacitor, and the cathode of the second diode is connected to the positive electrode of the first capacitor. A first connection terminal for connecting to one end of a first phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the first transistor and the cathode of the first diode, and a second connection terminal for connecting to the other end of the first phase winding is provided at the connection between the collector of the second transistor and the anode of the second diode.

[0007] The second device group is composed of a third triode, a fourth triode, a third diode and a fourth diode, the emitter of the third triode is connected to the cathode of the third diode, the collector of the third triode is connected to the positive electrode of the first capacitor, the anode of the third diode is connected to the negative electrode of the first capacitor, the collector of the fourth triode is connected to the anode of the fourth diode, the emitter of the fourth triode is connected to the negative electrode of the first capacitor, the cathode of the fourth diode is connected to the positive electrode of the first capacitor, and a third connection terminal for connecting to one end of the second phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the third triode and the cathode of the third diode, and a fourth connection terminal for connecting to the other end of the second phase winding is provided at the connection between the collector of the fourth triode and the anode of the fourth diode;

[0008] The third device group is composed of a fifth transistor, a sixth transistor, a fifth diode and a sixth diode, the emitter of the fifth transistor is connected to the cathode of the fifth diode, the collector of the fifth transistor is connected to the positive electrode of the first capacitor, the anode of the fifth diode is connected to the negative electrode of the first capacitor, the collector of the sixth transistor is connected to the anode of the sixth diode, the emitter of the sixth transistor is connected to the negative electrode of the first capacitor, the cathode of the sixth diode is connected to the positive electrode of the first capacitor, and a fifth connection terminal for connecting to one end of the third phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the fifth transistor and the cathode of the fifth diode, and a sixth connection terminal for connecting to the other end of the third phase winding is provided at the connection between the collector of the sixth transistor and the anode of the sixth diode.

[0009] An embodiment of the present application also provides a control device for a switched reluctance motor, comprising: a controller and a power supply terminal, a motor winding Hall, and a bus Hall according to an embodiment of the present application, wherein the power supply terminal is used to connect to an external power supply, and the positive terminal in the power supply terminal is connected to the collector of the first transistor, the third transistor, and the fifth transistor and the cathode of the first diode, the third diode, and the fifth diode, and the negative terminal in the power supply terminal is connected to the emitter of the second transistor, the fourth transistor, and the sixth transistor and the anode of the second diode, the fourth diode, and the sixth diode.

[0010] The controller and control device provided in the embodiments of the present application are configured by arranging a first device group, a second device group, and a third device group corresponding to the three-phase windings of the switched reluctance motor in a circuit module of the controller, and each device group in the first device group, the second device group, and the third device group is respectively composed of only two transistors and two diodes connected, and each device group is configured such that the emitter of a transistor is connected to the cathode of a diode, the collector of the transistor is connected to the positive electrode of the capacitor of the controller, and the anode of the diode is connected to the negative electrode of the capacitor, the collector of another transistor is connected to the anode of another diode, and the emitter of the other transistor is connected to the cathode of the diode. The negative electrode of the capacitor, the cathode of the other diode is connected to the positive electrode of the capacitor, and in each device group, connection terminals connected to the phase windings of the motor corresponding to each device group are respectively provided at the connection between the emitter of the one transistor and the cathode of the one diode and between the collector of the other transistor and the anode of the other diode. Therefore, the use of the above circuit structure reduces the circuit volume of the controller and effectively saves the circuit cost of the controller. In particular, only one IGBT can be used to encapsulate the above circuit. Compared with the existing technology that requires the use of three IGBTs to respectively encapsulate the circuits corresponding to each phase winding, a smaller and more compact controller circuit structure can be achieved.

[0011] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0013] Figure 1 This is a schematic diagram of an equivalent circuit of an embodiment of a controller provided in this application;

[0014] Figure 2 This is a schematic diagram of the structure of the control device provided in this application. DETAILED DESCRIPTION

[0015] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0016] With the development of motor technology, motors have gradually evolved from devices that were initially only able to provide simple conversion between mechanical energy and electrical energy to devices that can provide characteristics such as higher torque and can adapt to a wider range of working scenarios. In recent years, switched reluctance motors that utilize rotor magnetic resistance have been proposed. Because they can use the uneven distribution of rotor magnetic resistance to generate the torque that drives the rotor to rotate, they are very different from existing AC and DC motors in terms of structure and operating principle. Therefore, they have the characteristics of simple structure, low cost, high speed, high reliability, large starting torque, low starting current, high efficiency, and low loss. They have gradually become the mainstream trend in the future new energy electric vehicles and construction machinery fields.

[0017] Motors typically require a matching controller for drive control, such as providing the motor with the required power and operating control signals. The controller can also receive signals sensing the motor's operating status and generate corresponding control signals based on control logic. In a switched reluctance motor control scenario, when the controller receives a start control signal, it can first transmit power from an external power source to the first phase of the three-phase winding, energizing that phase. At this point, the phase winding receiving power is excited using the received DC power, establishing a radial magnetic field within the switched reluctance motor. The magnetic flux is closed through the stator yoke, stator poles, air gap, rotor poles, and rotor yoke. Because the magnetic lines of force passing through the air gap are curved, the magnetic resistance of the magnetic circuit is greater than when the stator and rotor pole axes coincide. Therefore, the rotor in the switched reluctance motor is driven by the torque generated by the tangential magnetic pull of the curved magnetic lines of force in the air gap. The axis of the rotor pole moves toward the axis of the stator pole of that phase and is subjected to a torque in that direction, for example, counterclockwise. When the axis of the rotor magnetic pole moves to coincide with the axis of the stator phase magnetic pole, the magnetic resistance is minimum and the phase will no longer generate torque. At this time, the controller can generate the next control signal based on the received operating status signal of the switched reluctance motor to energize the second phase winding adjacent to the first phase winding, that is, to transmit the power received from the external power supply to the second phase winding, so that the rotor can rotate counterclockwise. Similarly, the controller can continuously transmit power to the corresponding phase winding in the order of each phase according to the rotation state of the switched reluctance motor, and the motor rotor will rotate continuously in the opposite direction of the excitation sequence, for example, in the clockwise direction. In addition, when the motor needs to rotate in the opposite direction to the above direction, a control signal can be generated in a similar manner to the above to transmit power to each phase in the opposite order to the above, so that the motor can be driven to rotate in the clockwise direction.

[0018] In the prior art, an H-bridge composed of multiple transistors and diodes is generally used to form a control circuit. For example, in the prior art, a circuit with a circuit shape similar to an "H" shape composed of four parallel diodes and transistors can be used to control the single-phase winding of the switched reluctance motor. Therefore, the switched reluctance motor controller generally uses three such H-bridges to form the main body of the controller. In actual use, such an H-shaped circuit is usually integrated into an IGBT module to realize the control of the switched reluctance motor. However, due to the limited space of the IGBT module and the large number of devices included in the H-bridge circuit structure used in the prior art, Therefore, in the prior art, the three H-bridges can only be encapsulated in three IGBT modules to form a complete circuit structure. However, this also results in a larger overall volume of the controller. That is, since the circuit structure as the main body of the controller is based on the three IGBT modules, when designing other devices and heat dissipation structures, the volume can only be reduced to a very limited extent, and a truly miniaturized controller cannot be obtained. However, current new energy vehicles contain more and more components, and the volume allocated to each device or module is limited. Therefore, higher requirements are placed on the miniaturization of the motor controller and the control equipment including the controller.

[0019] To this end, in an embodiment of the present application, a controller is proposed, wherein the control circuit module contained in the controller is composed of only three device groups containing fewer devices, thereby greatly reducing the scale of the control circuit and enabling it to be integrated into an IGBT module. Figure 1 As shown in Figure 1 is a schematic diagram showing an equivalent circuit of a controller according to an embodiment of the present application, Figure 1 In the controller shown in , the controller may include: a circuit module 1 and a first capacitor 2. The circuit module 1 can be electrically connected to the positive and negative electrodes of the first capacitor and has connection terminals electrically connected to each phase winding of the three-phase winding of the switched reluctance motor to respectively provide power to each phase winding and send and receive signals, thereby driving the rotor in the switched reluctance motor to rotate. When the controller stops supplying power to the switched reluctance motor, since the windings of the switched reluctance motor still have energy, the switched reluctance motor will continue to operate after the control stops supplying power to it. At this time, the residual energy in the windings of the switched reluctance motor can be transferred to the first capacitor 2 through the loop formed by the connection between the controller and the first capacitor 2 and stored in the first capacitor 2. In this way, if the controller is insufficient in the process of supplying power to the switched reluctance motor, the energy stored in the first capacitor 2 can be released to the corresponding winding of the switched reluctance motor through the controller electrically connected thereto to maintain a constant supply current to the winding.

[0020] In an embodiment of the present application, the circuit module 1 may include a first device group 11, a second device group 12, and a third device group 13. The first device group 11, the second device group 12, and the third device group 13 are each connected in parallel to the first capacitor 2 and each have two terminals for connecting to corresponding phase windings of the three-phase winding of the switched reluctance motor. For example, the first device group 11 may be composed of a first transistor 111, a second transistor 112, and a first diode 113 and a second diode 114. The emitter of the first transistor 111 may be connected to the cathode of the first diode 113, and the collector of the first transistor 111 may be connected to the positive electrode of the first capacitor 2. The anode of the first diode 113 may be connected to the negative electrode of the first capacitor 2. The collector of the second transistor 112 may be connected to the anode of the second diode 114, and the emitter of the second transistor 112 may be connected to the negative electrode of the first capacitor 2. The cathode of the second diode 114 may be connected to the positive electrode of the first capacitor 2.

[0021] Two connection terminals for connecting to, for example, the first phase winding of the three-phase winding of the switched reluctance motor can also be provided in the first device group 11. For example, a first connection terminal 115 for connecting to one end of the first phase winding of the three-phase winding of the switched reluctance motor, for example, the U-phase winding, can be provided at the connection between the emitter of the first transistor 111 and the cathode of the first diode 113, and a second connection terminal 116 for connecting to the other end of the first phase winding, for example, the U-phase winding, can be provided at the connection between the collector of the second transistor 112 and the anode of the second diode 114.

[0022] The second device group 12 may be composed of a third transistor 121, a fourth transistor 122, a third diode 123, and a fourth diode 124. The emitter of the third transistor 121 may be connected to the cathode of the third diode 123, and the collector of the third transistor 121 may be connected to the anode of the first capacitor 2. The anode of the third diode 123 may be connected to the cathode of the first capacitor 2, and the collector of the fourth transistor 122 may be connected to the anode of the fourth diode 124. The emitter of the fourth transistor 122 is connected to the cathode of the first capacitor 2, and the cathode of the fourth diode 124 is connected to the anode of the first capacitor 2.

[0023] Two connection terminals for connecting to, for example, the second phase winding of the three-phase winding of the switched reluctance motor can also be provided in the second device group 12. For example, a third connection terminal 125 for connecting to one end of the second phase winding of the three-phase winding of the switched reluctance motor, for example, the V phase winding, can be provided at the connection between the emitter of the third transistor 121 and the cathode of the third diode 123, and a fourth connection terminal 126 for connecting to the other end of the second phase winding, for example, the V phase winding, can be provided at the connection between the collector of the fourth transistor 122 and the anode of the fourth diode 124.

[0024] The third device group 13 may be composed of a fifth transistor 131, a sixth transistor 132, a fifth diode 133, and a sixth diode 134. For example, the emitter of the fifth transistor 131 may be connected to the cathode of the fifth diode 133, and the collector of the fifth transistor 131 may be connected to the anode of the first capacitor 2. The anode of the fifth diode 133 may be connected to the cathode of the first capacitor 2. The collector of the sixth transistor 132 may be connected to the anode of the sixth diode 134, and the emitter of the sixth transistor 132 may be connected to the cathode of the first capacitor 2. The cathode of the sixth diode 134 may be connected to the anode of the first capacitor 2.

[0025] Two connection terminals for connecting to, for example, the third phase winding in the three-phase winding of the switched reluctance motor can also be provided in the third device group 13. For example, a fifth connection terminal 135 for connecting to one end of the third phase winding in the three-phase winding of the switched reluctance motor, for example, the W phase winding, can be provided at the connection between the emitter of the fifth transistor 131 and the cathode of the fifth diode 133, and a sixth connection terminal 136 for connecting to the other end of the third phase winding, for example, the W phase winding, can be provided at the connection between the collector of the sixth transistor 132 and the anode of the sixth diode 134.

[0026] In an embodiment of the present application, one or more of the first diode 113, the second diode 114, the third diode 123, the fourth diode 124, the fifth diode 133 and the sixth diode 134 can be fast recovery diodes or Schottky diodes. In particular, in an embodiment of the present application, all diodes in the first to third device groups can be Schottky diodes.

[0027] Therefore, with the help of the above-mentioned circuit structure of the controller according to the embodiment of the present application, when the controller is applied to an application scenario such as driving a motor of a new energy vehicle, the external power supply can be connected to the circuit module 1 separately, for example, it can be connected to each of the first to third device groups in the circuit module 1 separately to provide power to the control module. In the embodiment of the present application, the positive electrode of the external power supply can be connected to the collector of the first transistor 111 in the first device group 11, the collector of the third transistor 121 in the second device group 12, and the collector of the fifth transistor 131 in the third device group 13, and the negative electrode of the external power supply can be connected to the emitter of the second transistor 112 in the first device group 11, the emitter of the fourth transistor 122 in the second device group 12, and the collector of the sixth transistor 132 in the third device group 13. In addition, the first capacitor 2 can serve as the bus capacitance on the bus of the control circuit to absorb the overshoot current generated when the power is turned off.

[0028] For example, when it is necessary to drive the switched reluctance motor, the control circuit can control the current of the external power supply to flow from the collector of the first transistor 111 in the first device group 11 and out from the emitter of the first transistor 111. This is because the emitter of the first transistor 111 is connected to the cathode of the first diode 113. Therefore, the current flowing out from the emitter of the first transistor 111 cannot flow into the first diode 113 from the cathode of the first diode 113, but can only flow into the first phase winding of the switched reluctance motor, such as the U-phase winding, through the first connecting terminal 115 set at the connection between the emitter of the first transistor 111 and the cathode of the first diode 113, and generate a magnetic field by flowing through the U-phase winding, and then flow out from the other end of the U-phase winding to the second connecting terminal 116 set at the connection between the collector of the second transistor 112 and the anode of the second diode 114, and after passing through the second transistor 112, flow out from the emitter of the second transistor 112 back to the negative pole of the external power supply. Driven by the magnetic field generated by the U-phase winding, the axis of the rotor magnetic pole moves toward the axis of the V-phase magnetic pole of the stator and is subjected to a torque in that direction, for example, counterclockwise. When the axis of the rotor magnetic pole moves to coincide with the axis of the phase magnetic pole of the stator, the magnetic resistance is minimum and the phase will no longer generate torque. At this time, the controller according to the embodiment of the present application can generate the next control signal based on the received operating status signal of the switched reluctance motor, that is, the current provided by the external power supply flows into the collector of the third transistor 121 in the second device group 12, and flows through the V-phase winding connected to the second device group 12 in a manner similar to the above, and generates a corresponding magnetic field to continue to drive the axis of the rotor magnetic pole to move, and when the axis of the rotor magnetic pole rotates again to coincide with the axial direction of the phase magnetic pole of the stator, the controller can continue to generate the next control signal based on the collected rotation phase signal to provide power to the collector of the fifth transistor 131 in the third device group 13, and flow through the W-phase winding connected to the third device group 13 in a manner similar to the above, and then generate a corresponding magnetic field to continue to drive the rotor to rotate. When the power supply provided by the controller to the corresponding winding of the switched reluctance motor stops, for example, when the external power supply is turned off, although the power supply to the winding stops, that is, no current continues to flow into the corresponding winding through the connection terminals in the first, second or third device groups, there is still energy remaining in the winding, and even when the current from the controller to the winding stops, the winding will still transmit some residual current to the corresponding device group in the controller, that is, it will continue to receive current inflow from the connection terminals of the corresponding device group.For example, when the controller stops supplying power to the winding, the V-phase winding in the switched reluctance motor is receiving power from the second device group. Therefore, after the second device group 12 stops supplying power to the V-phase winding, the remaining current in the V-phase winding can continue to flow into the anode of the fourth diode 124 through the connection terminal provided between the collector of the fourth transistor 122 and the anode of the fourth diode 124 in the second device group 12 connected to the V-phase winding. The current then flows into the anode of the first capacitor 2 via the fourth diode 124, thereby being stored in the capacitor. In this embodiment, the energy stored in the capacitor 2 can be supplied to the phase winding through the connection terminal of the corresponding device group when the controller determines that the current currently supplied to the current phase winding of the switched reluctance motor is insufficient by collecting the operating status signal of the switched reluctance motor, thereby maintaining a constant current in the switched reluctance motor.

[0029] In addition, in the embodiment of the present application, the above-mentioned first to third device groups can be packaged in an IGBT module, thereby greatly reducing the size of the controller compared with the prior art that requires providing an IGBT module for packaging the device groups corresponding to each phase winding.

[0030] According to the embodiment of the present application, Figure 2 As shown in , a control device for a switched reluctance motor is also provided. Figure 2 is a schematic diagram showing the structure of a control device for a switched reluctance motor according to an embodiment of the present application, Figure 2 In the embodiment, the control device may include: a controller 10, a power terminal 20, a motor winding Hall 30 and a busbar Hall 40. The controller 10 may be based on the above embodiment. Figure 1 The controller 10 described above includes first to third device groups and a capacitor, and the controller 10 can be provided on a control board. A power supply terminal 20 can be provided on a high-voltage driver board and can include a positive terminal 201 and a negative terminal 202 for connecting to the positive and negative poles of an external power source, respectively. Furthermore, the positive terminal 201 can be connected to the collectors of the first, third, and fifth transistors 111, 121, and 131 of the controller, as well as the cathodes of the first, third, and fifth diodes 113, 123, and 133, while the negative terminal 202 is connected to the emitters of the second, fourth, and sixth transistors 112, 122, and 132, as well as the anodes of the second, fourth, and sixth diodes 114, 124, and 134. Thus, power from an external power source can be provided to the corresponding device groups via the positive and negative terminals 201, 202, and, under the control of the controller, to the corresponding phase windings, thereby driving the rotor in the switched reluctance motor to rotate.

[0031] In addition, a motor winding Hall 30 may be further provided on the control board of the control device. The motor winding Hall 30 may include a first winding Hall 301, a second winding Hall 302, and a third winding Hall 303 corresponding to the first to third phase windings of the switched reluctance motor, respectively. Therefore, one of the connection terminals in the first to third device groups in the controller, such as the first connection terminal in the first device group, the third connection terminal in the second device group, and the fifth connection terminal in the third device group, may be connected to the first winding Hall 301, the second winding Hall 302, and the third winding Hall 303, respectively, while the other connection terminals in each device group may be directly connected to the corresponding motor winding terminals provided on the control board. For example, the second connection terminal in the first device group, the fourth connection terminal in the second device group, and the sixth connection terminal in the third device group can be directly connected to the motor winding terminal set on the control board, while the first winding Hall 301, the second winding Hall 302, and the third winding Hall 303 that have been connected to the first connection terminal in the first device group, the third connection terminal in the second device group, and the fifth connection terminal in the third device group can be connected to the other one of the motor winding terminal pairs corresponding to each phase winding.

[0032] In addition, the busbar Hall 40 can be set on the control board of the controller, and the collectors of the first transistor 111, the third transistor 121 and the fifth transistor 131 and the cathodes of the first diode 113, the third diode 123 and the fifth diode 133 can be connected to one end of the busbar Hall 40, and the other end of the busbar Hall 40 can be connected to the positive terminal 201.

[0033] The controller and control device provided in the embodiments of the present application are configured by arranging a first device group, a second device group, and a third device group corresponding to the three-phase windings of the switched reluctance motor in a circuit module of the controller, and each device group in the first device group, the second device group, and the third device group is respectively composed of only two transistors and two diodes connected, and each device group is configured such that the emitter of a transistor is connected to the cathode of a diode, the collector of the transistor is connected to the positive electrode of the capacitor of the controller, and the anode of the diode is connected to the negative electrode of the capacitor, the collector of another transistor is connected to the anode of another diode, and the emitter of the other transistor is connected to the cathode of the diode. The negative electrode of the capacitor, the cathode of the other diode is connected to the positive electrode of the capacitor, and in each device group, connection terminals connected to the phase windings of the motor corresponding to each device group are respectively provided at the connection between the emitter of the one transistor and the cathode of the one diode and between the collector of the other transistor and the anode of the other diode. Therefore, the use of the above circuit structure reduces the circuit volume of the controller and effectively saves the circuit cost of the controller. In particular, only one IGBT can be used to encapsulate the above circuit. Compared with the existing technology that requires the use of three IGBTs to respectively encapsulate the circuits corresponding to each phase winding, a smaller and more compact controller circuit structure can be achieved.

[0034] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A controller for a switched reluctance motor, comprising: A circuit module and a first capacitor, wherein the circuit module includes a first device group, a second device group and a third device group, The first device group is composed of a first transistor, a second transistor, and a first diode and a second diode. The emitter of the first transistor is connected to the cathode of the first diode, the collector of the first transistor is connected to the positive electrode of the first capacitor, the anode of the first diode is connected to the negative electrode of the first capacitor, the collector of the second transistor is connected to the anode of the second diode, the emitter of the second transistor is connected to the negative electrode of the first capacitor, and the cathode of the second diode is connected to the positive electrode of the first capacitor. A first connection terminal for connecting to one end of a first phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the first transistor and the cathode of the first diode, and a second connection terminal for connecting to the other end of the first phase winding is provided at the connection between the collector of the second transistor and the anode of the second diode. The second device group is composed of a third triode, a fourth triode, a third diode and a fourth diode, the emitter of the third triode is connected to the cathode of the third diode, the collector of the third triode is connected to the positive electrode of the first capacitor, the anode of the third diode is connected to the negative electrode of the first capacitor, the collector of the fourth triode is connected to the anode of the fourth diode, the emitter of the fourth triode is connected to the negative electrode of the first capacitor, the cathode of the fourth diode is connected to the positive electrode of the first capacitor, and a third connection terminal for connecting to one end of the second phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the third triode and the cathode of the third diode, and a fourth connection terminal for connecting to the other end of the second phase winding is provided at the connection between the collector of the fourth triode and the anode of the fourth diode; The third device group is composed of a fifth transistor, a sixth transistor, a fifth diode and a sixth diode, the emitter of the fifth transistor is connected to the cathode of the fifth diode, the collector of the fifth transistor is connected to the positive electrode of the first capacitor, the anode of the fifth diode is connected to the negative electrode of the first capacitor, the collector of the sixth transistor is connected to the anode of the sixth diode, the emitter of the sixth transistor is connected to the negative electrode of the first capacitor, the cathode of the sixth diode is connected to the positive electrode of the first capacitor, and a fifth connection terminal for connecting to one end of the third phase winding of the three-phase winding of the switched reluctance motor is provided at the connection between the emitter of the fifth transistor and the cathode of the fifth diode, and a sixth connection terminal for connecting to the other end of the third phase winding is provided at the connection between the collector of the sixth transistor and the anode of the sixth diode.

2. The controller according to claim 1, characterized in that The circuit module is packaged in an IGBT module.

3. The controller according to claim 2, characterized in that One or more of the first diode, the second diode, the third diode, the fourth diode, the fifth diode and the sixth diode is a fast recovery diode or a Schottky diode.

4. A control device for a switched reluctance motor, comprising: The controller and power supply terminal, motor winding Hall and busbar Hall according to any one of claims 1 to 3, wherein the power supply terminal is used to connect to an external power supply, and the positive terminal in the power supply terminal is connected to the collector of the first transistor, the third transistor and the fifth transistor and the cathode of the first diode, the third diode and the fifth diode, and the negative terminal in the power supply terminal is connected to the emitter of the second transistor, the fourth transistor and the sixth transistor and the anode of the second diode, the fourth diode and the sixth diode.

5. The control device according to claim 4, characterized in that The control device further includes: a motor winding Hall, wherein the motor winding Hall is respectively connected to a corresponding one of the first to third windings of the switched reluctance motor, and one of the two connection terminals in the controller corresponding to the first to third windings is connected to the corresponding motor winding Hall.

6. The control device according to claim 5, characterized in that The control device further includes: a busbar Hall, wherein the collectors of the first transistor, the third transistor and the fifth transistor and the cathodes of the first diode, the third diode and the fifth diode are connected to one end of the busbar Hall, and the other end of the busbar Hall is connected to the positive pole of the power supply terminal.

7. The control device according to claim 6, characterized in that The control device further includes a high-voltage driving board and a control board, and the controller, the busbar Hall and the motor winding Hall are arranged on the control board, and the power supply terminal is arranged on the high-voltage driving board.

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