Motor control circuit and driving equipment

Abstract

The embodiment of the utility model provides a motor control circuit and driving equipment. The motor control circuit comprises a controlled motor; the signal control module is used for sending an instruction signal, and the instruction signal is used for controlling the running state of the controlled motor; one end of each state control module is connected with a three-phase alternating current power supply for supplying power to the controlled motor, the other end of each state control module is connected with the signal control module, and each state control module is used for receiving the instruction signal and determining the started state control module according to the instruction signal; according to the started state control module, the controlled motor is controlled to operate according to the operation state indicated by the instruction signal; wherein the plurality of state control modules comprise a shared state control module, the shared state control module is kept open when the operation state of the controlled motor is changed, and the phase port of the controlled motor which correspondingly supplies power is not changed. By introducing a plurality of state control modules, the circuit structure is simpler, and the application range is wider.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of motor control, and more particularly to a motor control circuit and a driving device. Background Art

[0002] In the prior art, the motor control circuit combined with a triac has a relatively complex structure, cumbersome operation, and a narrow application range. Therefore, how to improve the operation convenience and application range of the motor control circuit has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0003] In view of this, the embodiments of the present application provide a motor control circuit and a driving device to improve the operation convenience and application range of the motor control circuit.

[0004] To achieve the above object, the embodiments of the present application provide a motor control circuit, including:

[0005] A controlled motor;

[0006] A signal control module for sending an instruction signal, where the instruction signal is used to control the operating state of the controlled motor;

[0007] At least three state control modules, one end connected to a three-phase AC power supply for supplying power to the controlled motor, and the other end connected to the signal control module. Each of the state control modules is configured to receive the instruction signal, and determine the turned-on state control module according to the signal value of the received instruction signal, so as to control the controlled motor to operate according to the operating state indicated by the instruction signal according to the turned-on state control module;

[0008] Wherein, at least three state control modules include a shared state control module, and the shared state control module remains turned on when the operating state of the controlled motor changes, and the phase port of the controlled motor corresponding to the power supply remains unchanged.

[0009] Optionally, the state control module includes: an optocoupler module, one end connected to the signal control module, and the optocoupler module is configured to receive the instruction signal and send a mode signal according to the instruction signal;

[0010] A thyristor module, one end connected to the three-phase AC power supply and the other end of the optocoupler module, and the other end connected to the controlled motor. The thyristor module is configured to receive the mode signal to determine whether to connect the three-phase AC power supply connected to the thyristor module according to the mode signal.

[0011] Optionally, the optocoupler module includes a light-emitting diode and a photosensitive thyristor;

[0012] The positive electrode of the light-emitting diode is connected to a power supply, and the negative electrode of the light-emitting diode is connected to the signal control module;

[0013] The input end of the photosensitive thyristor is connected to a three-phase alternating current power supply, and the output end is connected to the thyristor module.

[0014] Optionally, it further includes:

[0015] A transistor, the input end of the transistor is connected to the negative electrode of the light-emitting diode, the control end of the transistor is connected to the signal control module, and the output end of the transistor is grounded.

[0016] Optionally, the photosensitive thyristor adopts a high-voltage-resistant photosensitive bidirectional thyristor;

[0017] The light-emitting diode adopts a fast-recovery diode with high reverse voltage resistance and low conduction voltage drop.

[0018] Optionally, it further includes: a current-limiting resistor, one end is connected to the optocoupler module, and the other end is connected to the thyristor module.

[0019] Optionally, it further includes: a misorder module, connected to the signal control module, and the misorder module is used to instruct the signal control module to change the operating state of the controlled motor corresponding to the instruction signal.

[0020] Optionally, the signal control module further includes a reverse control port, and the reverse control port is connected to the misorder module.

[0021] Optionally, the number of the state control modules is 5, and 1 of them is the shared state control module.

[0022] Optionally, one of the three-phase alternating current power supplies is connected to the shared state control module, and any one of the other two three-phase alternating current power supplies is connected to two state control modules, and the phase interfaces of the controlled motors connected by the two state control modules of any one of the three-phase alternating current power supplies are different.

[0023] The embodiment of the present application further provides a driving device, including the motor control circuit as described above.

[0024] The motor control circuit provided by the embodiment of the present application introduces at least three state control modules, and then changes the enabled state control modules through the command signals sent by the signal control module. At the same time, since the state control modules include shared state control modules, they remain enabled when the operating state of the controlled electrode changes, that is, the enabled state of the shared state control module does not change with the change of the operating state of the controlled motor. Therefore, when controlling the change of the operating state of the controlled motor (for example, changing from forward rotation to reverse rotation), by changing the enabling of other state control modules except the shared state control module, the change of the operating state of the controlled motor can be achieved, thus facilitating the control of the change of the operating state of the controlled motor, making the circuit structure simpler and having a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0026] Figure 1 It is a schematic structural diagram of a motor control circuit;

[0027] Figure 2 It is a schematic structural diagram of the motor control circuit provided by the embodiment of the present application;

[0028] Figure 3 It is another schematic structural diagram of the motor control circuit provided by the embodiment of the present application;

[0029] Figure 4 It is a schematic circuit diagram of the motor control circuit provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0031] With the continuous improvement of the level of industrial automation and intelligence, the requirements for the performance and reliability of power control systems are also increasing day by day. The traditional three-phase alternating current control technology has great limitations when facing complex and changeable control requirements.

[0032] Specifically, for example, using double contactors for switch control, such as Figure 1As shown in the figure, the structure for controlling the motor 11 and a three-phase AC power supply (not shown) includes two main parts: two contactors KM1 and KM2, and a control module Q1 for controlling the closing or opening of KM1 and KM2. Each of the contactors KM1 and KM2 includes three pairs of main contacts for connecting or disconnecting the phase ports L1, L2, and L3 of the motor 11 to the three-phase AC power supply. The control module Q1 is responsible for switching the states of the contactors KM1 and KM2 according to the control signal, thereby achieving the control of the motor. In addition, two sets of current-limiting resistors FU1 and FU2 are provided to protect the circuit.

[0033] In the normal working state, when the motor needs to rotate forward, the control module Q1 closes the three pairs of main contacts of the contactor KM1, so that the motor 11 is connected to the three-phase AC power supply according to the predetermined phase sequence, and the motor rotates in the predetermined direction. When the motor needs to rotate in reverse, the control module Q1 closes the three pairs of main contacts of the contactor KM2, and at the same time disconnects the main contacts of the contactor KM1, changing the phase sequence of the three-phase AC power supply connected to the motor 11, so that the motor rotates in the reverse direction.

[0034] When using double contactors to control a three-phase motor, it is easy to cause a short circuit in the power supply, damaging the motor, the contactors, and the entire electrical system, and even possibly triggering serious safety accidents such as fires. At the same time, the double contactors have a high maintenance cost, are prone to aging and wear, are difficult to replace parts, and also result in high circuit energy consumption. Moreover, the logic of the control module Q1 is relatively complex and difficult to integrate with external devices.

[0035] To solve the above problems, the inventors of this application considered a control solution that combines embedded development with triacs. Through the programming and configuration of the embedded system, precise control of the motor, multiple function expansions, and intelligent management can be achieved. At the same time, flexible external control interfaces and protocol support are provided, facilitating integration and communication with other systems and devices. This can not only improve the overall performance and reliability of the system, but also reduce the maintenance cost and upgrade difficulty, meeting the complex and changing industrial requirements.

[0036] The maturity and popularization of embedded development technology have brought a revolutionary change to the control of three-phase AC motors. With its powerful computing power, flexible programmability, and high integration characteristics, the embedded system provides strong technical support for the precise control of motors. Through the embedded system, we can monitor the operating state of the motor in real time, adjust the control strategy according to actual needs, and achieve the intelligent management of the motor.

[0037] The triac, as an advanced power electronic device, has significant advantages in the field of alternating current control. It can not only quickly respond to control signals to achieve precise regulation of current, but also has the characteristics of high efficiency and reliability, and is very suitable for the control of three-phase AC motors.

[0038] Based on the above ideas, the present application provides a motor control circuit and a driving device to improve the overall performance of the motor control system. As an optional implementation, Figure 2 The schematic structural diagram of a motor control circuit is shown. The motor control circuit includes the following parts:

[0039] The controlled motor 100;

[0040] The signal control module 200 is used to issue an instruction signal, and the instruction signal is used to control the operating state of the controlled motor 100;

[0041] At least three state control modules 300, one end is connected to the three-phase alternating current power supply 400 that supplies power to the controlled motor 100, and the other end is connected to the signal control module 200. Each of the state control modules 300 is used to receive the instruction signal, and determine the turned-on state control module 300 according to the signal value of the corresponding received instruction signal, so as to control the controlled motor 100 to operate in the operating state indicated by the instruction signal according to the turned-on state control module 300;

[0042] Among them, at least three state control modules 300 include a shared state control module 310. The shared state control module 310 remains turned on when the operating state of the controlled motor 100 changes, and the phase port of the corresponding powered controlled motor 100 remains unchanged.

[0043] It should be noted that the shared state control module 310 can be any one of the state control modules 300, and one can be determined from the state control modules 300 according to actual needs and circuit design requirements.

[0044] In this way, by introducing at least three state control modules, and then changing the turned-on state control module through the instruction signal issued by the signal control module. At the same time, since the state control modules include the shared state control module 310, it remains turned on when the operating state of the controlled electrode changes, that is, the turned-on state of the shared state control module 310 does not change with the change of the operating state of the controlled motor. Thus, when controlling the change of the operating state of the controlled motor (for example, changing from forward rotation to reverse rotation), by changing the turning on of other state control modules except the shared state control module 310, the change of the operating state of the controlled motor can be realized, which is convenient for controlling the change of the operating state of the controlled motor, making the circuit structure simpler and the applicable range wider.

[0045] Further, in an alternative implementation, please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the chip provided by the embodiments of the present application.

[0046] As Figure 3 shown, the state control module 300 includes:

[0047] An optocoupler module 320, one end of which is connected to the signal control module. The optocoupler module is used to receive the instruction signal and issue a mode signal according to the instruction signal;

[0048] A thyristor module 330, one end of which is connected to the three-phase AC power supply 400 and the optocoupler module 320, and the other end is connected to the controlled motor 100. The thyristor module 330 is used to receive the mode signal to determine whether to connect the three-phase AC power supply 400 connected to the thyristor module 330 according to the mode signal. In this way, by using bidirectional thyristor devices such as the optocoupler module 320 and the thyristor module 330 instead of contact switches, physical wear in the circuit caused by physical contact can be avoided, thereby improving the reliability of the motor control circuit.

[0049] At the same time, compared with contact switches, bidirectional thyristor devices respond to control signals faster and regulate current more precisely, making the motor control circuit more efficient and reliable. In addition, using the optocoupler module 320 and the thyristor module 330 can not only adapt to existing control modules, but also adapt to control modules implemented through embedded design, thus making the motor control circuit more widely applicable.

[0050] Further, when replacing the contact switch with a bidirectional thyristor device, a signal control module 200 that can be implemented by an embedded system can be used, and other embedded modules for monitoring the circuit state and the motor state can be added to the circuit and fed back to the signal control module 200.

[0051] Implementing the signal control module 200 through an embedded system compared with implementing the signal control module 200 through a traditional circuit. In terms of precise control, the embedded system combined with a bidirectional thyristor can achieve precise control of the controlled motor 100, including precise adjustment of parameters such as the speed, steering, and torque of the controlled motor 100. This helps to improve the operating efficiency of the controlled motor 100, reduce energy waste, and improve the overall energy efficiency.

[0052] Secondly, in terms of intelligent management, the embedded system can achieve intelligent management of the motor through programming and configuration. For example, the monitoring module monitors the operating status and working environment of the motor and feeds back signals to the signal control module 200. The signal control module 200 can adjust the operating parameters of the controlled motor 100 according to the monitored data to ensure that the controlled motor 100 always operates in the best state. In addition, the signal control module 200 can also implement fault diagnosis and early warning functions, timely discover and handle potential problems in the operation of the controlled motor 100, and improve the reliability and stability of the controlled motor 100.

[0053] Furthermore, using embedded development plus triac control for three-phase motors can also improve the flexibility and expandability of the system. The embedded system has strong customizability and programmability and can be flexibly configured and adjusted according to different application requirements. At the same time, the triac, as a non-contact switch, has the characteristic of being easy to integrate with external devices, facilitating the implementation of more complex control functions.

[0054] Finally, this control scheme also helps to reduce the maintenance cost and upgrade difficulty of the system. Since both the embedded system and the triac have high stability and reliability, the replacement and maintenance frequency of electrical components can be reduced. At the same time, the replacement of each module of the embedded system is simple. The circuit performance can be improved simply by replacing the same-structured and more advanced components without modifying the circuit structure.

[0055] Specifically, in an optional implementation, the number of the state control modules 300 can be 5. Correspondingly, the number of the optocoupler modules 320 and the thyristor modules 330 is also 5 each.

[0056] It should be noted that since the power supply connected to the controlled motor 100 is a three-phase AC power supply 400, the controlled motor 100 is a three-phase motor. Further, when the three-phase motor switches the rotation direction, one phase of the three-phase AC power supply 400 connected to a phase interface (pin) of the three-phase motor needs to remain unchanged, and the other two phases of the three-phase AC power supply 400 corresponding to the connected phase interfaces are exchanged.

[0057] For example, the three phase interfaces of the three-phase motor are U, V, and W, and one phase of the three-phase AC power supply 400 is L1, another phase is L2, and the other phase is L3. When the three-phase motor rotates forward, the phase interface U is connected to the AC power supply L1, the phase interface V is connected to the AC power supply L2, and the phase interface W is connected to the AC power supply L3. When the three-phase motor rotates in reverse, the phase interface U is connected to the AC power supply L1, the phase interface V is connected to the AC power supply L3, and the phase interface W is connected to the AC power supply L2.

[0058] Therefore, in the embodiments of the present application, during the process of changing the operating state of the controlled motor 100, among the three-phase AC power supplies that supply power to one of the phase interfaces of the controlled motor 100, the state control module corresponding to the unchanged single-phase AC power supply is referred to as the shared state control module 310, and the other two AC power supplies are respectively connected to two state control modules 300.

[0059] Therefore, the total number of the state control modules 300 is 5. Correspondingly, each state control module 300 includes 1 optocoupler module 320 and 1 thyristor module 330. Therefore, the numbers of the optocoupler module 320 and the thyristor module 330 are also 5 each.

[0060] One of the three-phase AC power supplies 400 is connected to the shared state control module 310, and any one of the other two-phase AC power supplies is connected to two state control modules 300, and the phase interfaces of the controlled motor 100 connected by the two state control modules 300 of any one of the AC power supplies are different.

[0061] In an operating state of the controlled motor 100 (such as forward rotation), for the three-phase AC power supply connected to two state control modules 300, only one of the state control modules q is turned on. Assume that the turned-on state control module 300 controls the connection to the three-phase AC power supply L2, and the other end is connected to the phase interface V of the controlled motor 100. Thus, through the turned-on state control module q, the three-phase AC power supply L2 is controlled to supply power to the phase interface V of the controlled motor 100. When it is necessary to change the operating state of the controlled motor 100, the other state control module m connected to the three-phase AC power supply L2 is turned on. The other end of the state control module m is connected to the phase interface W of the controlled motor 100. Thus, through the turned-on state control module m, the three-phase AC power supply L2 is controlled to supply power to the phase interface W of the controlled motor 100, thereby changing the operating state of the controlled motor 100, that is, reverse rotation.

[0062] In this way, the motor control circuit provided by the embodiments of the present application, by introducing a control scheme combining embedded development and bidirectional thyristors, makes the circuit structure simpler and has a wider application range. At the same time, by replacing the general contact switch with a bidirectional thyristor, the physical loss in the circuit is reduced, the service life of the circuit is extended, and the control circuit can be more easily integrated with external devices, facilitating the implementation of more complex control functions.

[0063] Specifically, the motor control circuit provided by the embodiments of the present application is as Figure 4 shown Figure 4 showing the circuit diagram of a motor control circuit.

[0064] As Figure 4 shown, the thyristor module 330 in the motor control circuit includes five thyristor modules Q1 to Q5, and the optocoupler module 320 includes five optocoupler modules U1 to U5. The three-phase AC power supply 400 includes three AC power supplies L1, L2, and L3, the controlled motor 100 includes three phase interfaces U, V, and W, and the signal control module 200 includes five output terminals: P1 to P5.

[0065] Further, as Figure 4 shown, in an alternative implementation, the input terminal of each thyristor module 330 is connected to one of the three-phase AC power supplies, the control pin of each thyristor module 330 is connected to an optocoupler module 320, and the output terminal of each thyristor module 330 is connected to one of the phase interfaces of the controlled motor 100.

[0066] Taking Figure 4 the thyristor module Q1 in it as an example, when the input terminal 2 of the thyristor module Q1 is connected to the AC power supply L1 in the three-phase AC power supply, the output terminal 1 of the thyristor module 330 is connected to the phase interface U of the controlled motor 100, and the control pin 3 of the thyristor module 330 is connected to the optocoupler module U1. When there is no voltage on the control pin 3, the thyristor module Q1 is turned off, and there is no current between the input terminal 1 and the output terminal 2. When the control pin 3 is connected to voltage, the input terminal 1 and the output terminal 2 are turned on, so that the AC power supply L1 supplies power to the corresponding connected phase interface U of the controlled motor 100.

[0067] Further, the structure of the optocoupler module 320 is as Figure 4 shown. In an alternative implementation, the optocoupler module includes a light-emitting diode and a photosensitive thyristor.

[0068] The light-emitting diode can be arranged on the control side, and the photosensitive thyristor can be arranged on the driving side. As Figure 4 shown, the control side can be the side where the signal control module (MCU) is located, and the driving side can be the side where the thyristor module is located.

[0069] Taking Figure 4 the optocoupler module U1 in it as an example, the photosensitive thyristor of the optocoupler module U1 is connected to the AC power supply L1 of the three-phase AC power supply 400 and the control pin 3 of the thyristor module Q1. The light-emitting diode of the optocoupler module U1 is connected to the signal control module (such as the pin P1 of the signal control module) and a voltage stabilizing power supply 340. Preferably, the voltage of the voltage stabilizing power supply 340 is 3.3V.

[0070] Further, in an alternative implementation, it further includes: a transistor, the input end of the transistor is connected to the negative electrode of the light-emitting diode, the control end of the transistor is connected to the signal control module, and the output end of the transistor is grounded.

[0071] As Figure 4 shown, in the motor control circuit provided in the embodiment of the present application, it includes transistors M1 to M5. Taking transistor M1 as an example, the negative electrode of the light-emitting diode of the optocoupler module U1 is connected to the input end of transistor M1, the control end of transistor M1 is connected to pin P1 of the signal control module 200, and the output end of transistor M1 is grounded.

[0072] Taking transistor M1 and optocoupler module U1 as in Figure 4 as an example, the control end of transistor M1 is connected to pin P1 of the signal control module 200, the input end of transistor M1 is connected to the light-emitting diode of the optocoupler module U1, and the output end of transistor M1 is grounded.

[0073] When the signal sent by pin P1 of the signal control module 200 is a component signal in the command signal, the signal sent by pin P1 causes transistor M1 to conduct, and the 3.3V regulated power supply 340 is connected to the ground through the light-emitting diode of the optocoupler module U1 and transistor M1. At this time, both ends of the light-emitting diode of the optocoupler module U1 are conducting, and the light-emitting diode starts to emit light. Then the photosensitive thyristor of the optocoupler module U1 receives the optical signal of the light-emitting diode and conducts, so that the current of the AC power supply L1 passes through the photosensitive thyristor of the optocoupler module U1 and conducts to the control pin 3 of the thyristor module Q1. After the control pin 3 of the thyristor module Q1 is connected with current, the thyristor module Q1 conducts, thereby providing the current of the AC power supply L1 to the phase interface U of the controlled motor 100.

[0074] It should be noted that, as Figure 4 shown in the circuit diagram, the phase interface V of the controlled motor 100 is connected to the AC power supply L2 through the thyristor module Q2, and the thyristor module Q2, the optocoupler module U2 and pin P2 of the signal control module 200 are connected in sequence. At the same time, the phase interface V of the controlled motor 100 is connected to the AC power supply L3 through the thyristor module Q4, and the thyristor module Q4, the optocoupler module U4 and pin P4 of the signal control module 200 are connected in sequence.

[0075] The phase interface W of the controlled motor 100 is connected to the phase line L2 through the thyristor module Q3, and the thyristor module Q3, the optocoupler module U3, and the pin P3 of the signal control module 200 are connected in sequence. At the same time, the phase interface W of the controlled motor 100 is connected to the phase line L3 through the thyristor module Q5, and the thyristor module Q5, the optocoupler module U5, and the pin P5 of the signal control module 200 are connected in sequence. The current conduction conditions among the above-mentioned various modules will not be elaborated here.

[0076] Further, from the connection relationship of the above circuit, it can be known that the signals sent by the pin P2 and the pin P4 of the signal control module 200 control the conduction of the phase interface V of the controlled motor 100 with the AC power supply L2, and control the conduction of the phase interface W with the AC power supply L3. The signals sent by the pin P3 and the pin P5 of the control module 200 control the conduction of the phase interface W of the controlled motor 100 with the AC power supply L2 and the phase interface V with the AC power supply L3.

[0077] When the signals sent by the pin P1, the pin P2, and the pin P5 of the control module 200 form the command signal, the optocoupler module U1, the optocoupler module U2, and the optocoupler module U5 are turned on. Further, the thyristor module Q1, the thyristor module Q2, and the thyristor module Q5 are turned on. Thus, the phase interface V of the controlled motor 100 is powered by the AC power supply L2, the phase interface W of the controlled motor 100 is powered by the AC power supply L3, and the phase interface U of the controlled motor 100 is powered by the AC power supply L1. At this time, the controlled motor 100 rotates forward.

[0078] When the signals sent by the pin P1, the pin P3, and the pin P4 of the control module 200 form the command signal, the optocoupler module U1, the optocoupler module U3, and the optocoupler module U4 are turned on. Further, the thyristor module Q1, the thyristor module Q3, and the thyristor module Q4 are turned on. Thus, the phase interface V of the controlled motor 100 is powered by the AC power supply L3, the phase interface W of the controlled motor 100 is powered by the AC power supply L2, and the phase interface U of the controlled motor 100 is powered by the AC power supply L1. At this time, the controlled motor 100 rotates in reverse.

[0079] Further, in an optional implementation, it further includes: a current-limiting resistor, one end of which is connected to the optocoupler module and the other end is connected to the thyristor module. Specifically, as Figure 4 shown, it includes current-limiting resistors R1 to R4. Taking the current-limiting resistor R1 as an example, one end of the current-limiting resistor R1 is connected to the optocoupler module U1 and the other end is connected to the thyristor module Q1. In this way, by adding the current-limiting resistor, it is possible to avoid excessive instantaneous current in the circuit from damaging the circuit and protect the safe use of the circuit.

[0080] Further, in an alternative implementation, the photosensitive thyristor is a high-voltage-resistant photosensitive bidirectional thyristor; the light-emitting diode is a fast-recovery diode with high reverse voltage resistance and low conduction voltage drop.

[0081] Further, please continue to refer to Figure 3 , in an alternative implementation, it further includes a misorder module 500 connected to the signal control module 200. The misorder module 500 is used to instruct the signal control module 200 to change the operating state of the controlled motor 100 indicated by the instruction signal.

[0082] It should be noted that in the actual circuit connection, the actual connection order of the alternating current power supply L1, alternating current power supply L2, and alternating current power supply L3 of the three-phase alternating current power supply may be different from the connection order used in the design of the motor control circuit provided in the embodiments of the present application, resulting in the actual rotation direction of the controlled motor 100 being opposite to the expected rotation direction. At this time, the misorder module 500 is required to instruct the signal control module 200 to change the operating state of the controlled motor 100 indicated by the instruction signal issued by the signal control module 200.

[0083] Specifically, the circuit structure of the misorder module 500 is as Figure 4 shown. In an alternative implementation, the signal control module 200 further includes a reverse control port P6, and the reverse control port P6 is connected to the misorder module 500. The misorder module 500 is a switch K1 as Figure 4 shown.

[0084] When the phase sequence of the three-phase alternating current power supply is normal, the switch K1 disconnects and there is no signal at the control port P6, and the instruction signal issued by the signal control module 200 is normal. When the phase sequence of the three-phase alternating current power supply is misordered, the switch K1 can be closed so that the control port P6 is connected to the ground wire to indicate that the signal control module 200 needs to change the operating state corresponding to the instruction signal.

[0085] The embodiments of the present application further provide a driving device, and the driving device includes the motor control circuit as described above.

[0086] Although the embodiments of the present application are disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A motor control circuit, characterized in that: include: Controlled motor; A signal control module, used for issuing a command signal, wherein the command signal is used for controlling the operating state of the controlled motor; at least three state control modules, one end of which is connected to a three-phase AC power supply for supplying power to the controlled motor, and the other end of which is connected to the signal control module, each of which is used to receive the command signal and determine the turned-on state control module according to the signal value of the corresponding received command signal, so as to control the controlled motor to operate according to the operating state indicated by the command signal according to the turned-on state control module; Among them, at least three state control modules include a shared state control module, and the shared state control module remains turned on when the operating state of the controlled motor changes, and the phase port of the controlled motor corresponding to the power supply remains unchanged.

2. The motor control circuit according to claim 1, characterized in that: The state control module includes: an optical coupling module, one end of which is connected to the signal control module, and the optical coupling module is used to receive the command signal and send a mode signal according to the command signal; A thyristor module, one end of which is connected to the three-phase AC power supply and the other end of the optocoupler module, and the other end of which is connected to the controlled motor. The thyristor module is used to receive the mode signal to determine whether to connect the three-phase AC power supply connected to the thyristor module according to the mode signal.

3. The motor control circuit according to claim 2, characterized in that: The optical coupling module includes a light emitting diode and a photosensitive thyristor; The positive electrode of the light emitting diode is connected to the power supply, and the negative electrode of the light emitting diode is connected to the signal control module; The input end of the photosensitive thyristor is connected to a three-phase alternating current power supply, and the output end is connected to the thyristor module.

4. The motor control circuit according to claim 3, characterized in that: Also includes: A transistor, wherein the input end of the transistor is connected to the cathode of the light emitting diode, the control end of the transistor is connected to the signal control module, and the output end of the transistor is grounded.

5. The motor control circuit according to claim 4, characterized in that: The photosensitive thyristor adopts a high-voltage photosensitive bidirectional thyristor; The light emitting diode is a fast recovery diode with high reverse withstand voltage and low conduction voltage drop.

6. The motor control circuit according to any one of claims 2 to 5, characterized in that: Also includes: A current limiting resistor, one end of which is connected to the optocoupler module, and the other end of which is connected to the thyristor module.

7. The motor control circuit according to claim 6, characterized in that: Also includes: A wrong sequence module is connected to the signal control module, and the wrong sequence module is used to instruct the signal control module to change the operating state of the controlled motor corresponding to the instruction signal.

8. The motor control circuit according to claim 7, characterized in that: The signal control module further includes a reverse control port, and the reverse control port is connected to the out-of-sequence module.

9. The motor control circuit according to claim 6, characterized in that: The number of the state control modules is 5, of which one is the shared state control module.

10. The motor control circuit according to claim 9, characterized in that: One phase of the three-phase AC power supply is connected to the shared state control module, and any one of the other two phases of the AC power supply is connected to two state control modules, and the phase interfaces of the controlled motors connected to the two state control modules of any one phase of the AC power supply are different.

11. A driving device, characterized in that: Comprising the motor control circuit as described in any one of claims 1-10.

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