CN113300660A - Multifunctional motor control circuit and control method - Google Patents

Multifunctional motor control circuit and control method Download PDF

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Publication number
CN113300660A
CN113300660A CN202110664932.6A CN202110664932A CN113300660A CN 113300660 A CN113300660 A CN 113300660A CN 202110664932 A CN202110664932 A CN 202110664932A CN 113300660 A CN113300660 A CN 113300660A
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CN
China
Prior art keywords
module
winding
power device
motor
winding module
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CN202110664932.6A
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Chinese (zh)
Inventor
王广
胡秋实
杨雪娇
贾永茂
乔海超
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Guohua Qingdao Intelligent Equipment Co ltd
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Guohua Qingdao Intelligent Equipment Co ltd
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Priority to CN202110664932.6A priority Critical patent/CN113300660A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
    • H02P25/184Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/22Multiple windings; Windings for more than three phases

Abstract

The invention discloses a multifunctional motor control circuit and a control method, wherein the control circuit comprises a main winding module used for switching a star winding and a triangular winding of a motor; the standby winding module is used for redundancy backup of the main winding module; the bridge arm module is used for amplifying the power of the main/standby winding module and providing current for the main/standby winding module; and the control module is used for detecting the real-time state of the motor, controlling the main/standby winding module and the bridge arm module and realizing the conversion of star-shaped and triangular connection of the winding. The control module detects the rotating speed of the motor and the running state of the motor in real time; when a main winding module of the motor is abnormal, switching to a standby winding module; and the main/standby winding module is controlled to be switched into star connection or triangular connection according to the rotating speed of the motor. The invention realizes the safe switching of the motor windings among star connection or delta connection according to the operation condition, and simultaneously increases the redundant backup windings, thereby increasing the applicability of the motor and improving the reliability of the motor.

Description

Multifunctional motor control circuit and control method
Technical Field
The invention belongs to the field of motor technology and control, and particularly relates to a multifunctional motor control circuit and a control method.
Background
With the rapid development of social economy, the requirements of people on the quality of life and the living environment are higher and higher, the environmental pollution is more and more serious nowadays, the emission of automobile exhaust is an important factor causing the environmental pollution, and a new energy automobile is an automobile using electric energy as power, has small environmental pollution and adapts to the current environmental protection trend, so the use population is gradually increased. One of the core components of the new energy automobile is a motor.
The connection mode of the stator winding of the motor is divided into triangular connection and star connection, and under the same voltage and current input, the stator winding of the motor adopting the star connection mode is beneficial to reducing the bearing voltage (220V) of the winding, and has low insulation grade and low starting current. The disadvantage is reduced motor power. The adoption of a triangular stator winding is beneficial to improving the power of the motor, and the defects are that the starting current is large, the winding bears large voltage (380V), and the insulation grade is high. In the existing motor, a star winding or a triangular winding is adopted independently, so that the motor cannot play the maximum role, the output of the motor in each frequency band cannot meet the requirement of practical application, and the motor can be selected only by omitting a part of performances according to the preset requirement, thereby severely restricting the application occasion and reducing the research and development progress. In addition, the existing motor does not realize the redundancy switching function, once some windings of the motor are burnt out, the motor is likely to be scrapped, the motor needs to be replaced, the failure rate is high, the reliability is low, and the maintenance cost is increased.
Based on the above description, there is a need for a multifunctional motor control circuit and a control method thereof, so as to solve the problems that the motor can only adopt a star-shaped or triangular winding manner and cannot switch the winding manner according to the operation condition, and the motor has no redundant backup, and has high failure rate and low reliability.
Disclosure of Invention
The invention aims to provide a multifunctional motor control circuit and a control method, which can realize that a motor has two modes of triangular connection and star connection, and the two modes can be mutually backed up and redundant.
In order to solve the technical problems, the specific technical scheme of the multifunctional motor control circuit and the control method is as follows:
a multi-function motor control circuit comprising:
the main winding module is used for converting a star winding and a triangular winding of the motor;
the bridge arm module is used for amplifying the power of the main winding module and supplying current to the main winding module;
the control module is used for detecting the real-time state of the motor, controlling the main winding module and the bridge arm module and realizing the conversion between the star winding and the triangular winding of the main winding module;
wherein:
the control module is connected with the bridge arm module, the main winding module is provided with a first winding, a second winding, a third winding and first to eighth power devices, the first to eighth power devices respectively comprise a first grid to an eighth grid, a first source to an eighth source and a first drain to an eighth drain, the first grid to the eighth grid are connected with the control module, one end of the first winding is connected with the first source, the fifth drain and the bridge arm module, the other end of the first winding is connected with the first drain, the second drain and the third drain, one end of the second winding is connected with the second source and the fourth source, the bridge arm module is connected, the other end of the second winding is connected with the third source electrode, the fourth drain electrode, the sixth drain electrode and the seventh drain electrode, one end of the third winding is connected with the sixth source electrode, the eighth source electrode and the bridge arm module, and the other end of the third winding is connected with the fifth source electrode, the seventh source electrode and the eighth drain electrode.
Furthermore, the main winding module further comprises a first filtering unit to an eighth filtering unit, and two ends of the first filtering unit to the eighth filtering unit are respectively connected with the first source electrode to the eighth source electrode and the first drain electrode to the eighth drain electrode, and are used for absorbing surge current during winding switching.
Furthermore, the first to eighth filtering units respectively include first to eighth capacitors, first to eighth resistors, one ends of the first to eighth capacitors are connected to one ends of the first to eighth resistors, the other ends of the first to eighth capacitors are connected to the first to eighth source electrodes, and the other ends of the first to eighth resistors are connected to the first to eighth drain electrodes.
Furthermore, the main winding module further comprises a first freewheeling diode to an eighth freewheeling diode, anodes of the first freewheeling diode to the eighth freewheeling diode are respectively connected with the first source electrode to the eighth source electrode, and cathodes of the first freewheeling diode to the eighth freewheeling diode are respectively connected with the first drain electrode to the eighth drain electrode for absorbing reverse current on the winding coil.
Further, the first to eighth power devices are first to eighth MOS transistors.
Further, the bridge arm module is a main circuit formed by power devices.
And further, the winding device also comprises a standby winding module which has the same circuit with the main winding module and is used for redundancy backup of the main winding module. The bridge arm module is also used for amplifying the power of the standby winding module and providing current for the standby winding module; the control module is also used for controlling the main winding module, the standby winding module and the bridge arm module to realize the switching between the main winding module and the standby winding module, and controlling the standby winding module and the bridge arm module to realize the conversion between the star winding and the triangular winding of the standby winding module.
The invention also provides a multifunctional motor control method, which comprises the following steps:
s1, detecting the running state of the motor in real time;
s2, judging the running state of the main winding module, when the main winding module of the motor is normal, controlling the main winding by the bridge arm module to provide current for the main winding module, and disconnecting the standby winding module by the control module;
s3, detecting the rotating speed of the motor in real time;
s4, judging the rotating speed of the motor, when the rotating speed of the motor is less than 5% of the rated rotating speed, controlling the main winding module or the standby winding module to be switched into star connection by the control module, and when the rotating speed of the motor is more than 5% of the rated rotating speed, controlling the main winding module or the standby winding module to be switched into delta connection by the control module;
and S5, continuously detecting the running state of the motor and the rotating speed of the motor in real time.
Further, the method for the control module to disconnect the standby winding module includes turning off a first power device, a fourth power device and an eighth power device of the standby winding module, and turning on a second power device, a third power device, a fifth power device, a sixth power device and a seventh power device of the standby winding module; the method for the control module to disconnect the main winding module comprises the steps of closing the first power device, the fourth power device and the eighth power device of the main winding module, and opening the second power device, the third power device, the fifth power device, the sixth power device and the seventh power device of the main winding module.
Further, the method for controlling the main winding module or the standby winding module to be switched to the star connection by the control module is to turn on the first power device, the second power device, the fourth power device, the fifth power device, the sixth power device and the eighth power device, and turn off the third power device and the seventh power device; the method for controlling the main winding module or the standby winding module to be switched into the triangular connection by the control module is to turn on the first power device, the third power device, the fourth power device, the seventh power device and the eighth power device and turn off the second power device, the fifth power device and the sixth power device.
The multifunctional motor control circuit and the control method have the following advantages:
1. by using the control circuit and the control method, the motor can have two winding modes of triangle and star, and can be switched between the two winding modes according to the operation condition of the motor, so that the performance of the motor is optimized, the volume of the motor is reduced, and the applicability of the motor is increased.
2. The control circuit and the control method also increase the redundant backup winding, when one winding has a fault, the other winding can be switched to in time, the reliability of the motor is improved, and the fault rate of the motor is reduced.
3. The control circuit and the control method adopt a switching mode with a protection function and a switching circuit, namely a filtering unit consisting of a capacitor and a resistor is adopted to absorb surge current during winding switching, and a diode is adopted to absorb reverse current on a winding coil, so that the risk of damaging a motor during winding switching is reduced, and the service life of the motor is prolonged.
Drawings
FIG. 1 is a schematic diagram of a control circuit according to the present invention;
fig. 2 is a schematic diagram of the connection between the control module and the main winding module and between the control module and the standby winding module according to the present invention;
FIG. 3 is a flow chart illustrating a control method according to the present invention.
In the figure:
1. a main winding module; 2. preparing a winding module; 3. a bridge arm module; 4. and a control module.
Detailed Description
In order to better understand the control circuit and the control method of the present invention, a multifunctional motor control circuit and a control method of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, a control circuit of a multifunctional motor according to the present invention includes a main winding module 1, a standby winding module 2, a bridge arm module 3, and a control module 4.
The control module 4 is used for controlling the main winding module, the standby winding module and the bridge arm module, and switching on and off a power device in the circuit according to requirements, so that the motor can be converted into another winding mode, or the switching of the main winding module and the standby winding module is realized.
The bridge arm module 3 is used for amplifying the power of the main winding module and the standby winding module and providing current required by the work for the main winding module and the standby winding module.
The main winding module 1 is used for receiving a control signal of the control module, and switching on and off a power device on the winding to realize switching of the connection mode of the motor winding.
The standby winding module 2 is used for receiving a control signal of the control module, turning on and off power devices on the winding, switching of connection modes of the motor winding is achieved, meanwhile, the standby winding module receives control of the main control module, redundancy backup can be conducted, reliability of the motor is improved, applicability of the motor is improved, performance of the motor is optimized, efficiency of the motor is improved, research and development cost is reduced, and research and development time is saved.
The control module 4 can be a main control circuit such as a dsp, stm32, fpga, or the like, and is mainly used for detecting a real-time state of the motor, controlling the main winding, the backup winding, and the bridge arm unit by detecting the state, and turning on and off a power device in the circuit according to a requirement, so as to ensure that the motor can be converted into another winding mode, ensure switching between the main winding and the backup winding, and improve reliability of the motor. It is possible to switch one as usual after the other has burned out. When the motor is in a normal running state, the running state of the motor is detected in real time, and the connection mode of the stator winding is switched according to the running state of the motor so as to meet different application places and different movement working conditions. Meanwhile, the high-reliability control circuit is provided, and the safety of the motor can be ensured when the triangle and star switching and the redundancy switching of the motor winding are carried out.
The bridge arm module 3 is a main circuit formed by power devices, and the power devices can be MOS transistors (metal-oxide semiconductor field effect transistors), IGBTs (insulated gate bipolar transistors), and the like, and are used for power amplification of the main winding module and the standby winding module, and supplying current required by work to the main winding module and the standby winding module.
The main winding module 1 comprises a first winding U, a second winding V and a third winding W; a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8; the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8; a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8; the power device comprises a first power device Q1, a second power device Q2, a third power device Q3, a fourth power device Q4, a fifth power device Q5, a sixth power device Q6, a seventh power device Q7 and an eighth power device Q8. The first to eighth power devices may be MOS transistors (metal-oxide semiconductor field effect transistors), each power device includes a gate G, a source, and a drain, that is, the first to eighth power devices include a first gate G1, a first source, and a first drain, respectively; a second gate G2, a second source, and a second drain; a third gate G3, a third source, and a third drain; a fourth gate G4, a fourth source, and a fourth drain; a fifth gate G5, a fifth source, and a fifth drain; a sixth gate G6, a sixth source, and a sixth drain; a seventh gate G7, a seventh source, a seventh drain; an eighth gate G8, an eighth source, and an eighth drain.
One end of a first capacitor C1 is connected with the first resistor R1, and the other end of the first capacitor C1 is connected with the anode of the first diode D1 and the source of the first power device Q1; one end of the first resistor R1 is connected to the cathode of the first diode D1 and to the drain of the first power device Q1. The source of the first power device Q1 is connected to one end of the first winding U, the drain of the first power device Q1 is connected to the other end of the first winding U, and the drains of the second power device Q2 and the third power device Q3 are connected. One end of a second capacitor C2 is connected with the second resistor R2, and the other end of the second capacitor C2 is connected with the anode of the second diode D2 and the source of the second power device Q2; one end of the second resistor R2 is connected to the cathode of the second diode D2 and to the drain of the second power device Q2, and the source of the second power device Q2 is connected to the source of the fourth power device Q4. One end of a third capacitor C3 is connected with the third resistor R3, and the other end of the third capacitor C3 is connected with the anode of the third diode D3 and the source of the third power device Q3; one end of the third resistor R3 is connected to the cathode of the third diode D3, and to the drain of the third power device Q3. The source of the third power device Q3 is connected to the drain of the fourth power device Q4. One end of a fourth capacitor C4 is connected with the fourth resistor R4, and the other end of the fourth capacitor C4 is connected with the anode of the fourth diode D4, and is also connected with the source of the fourth power device Q4 and one end of the second winding V; one end of the fourth resistor R4 is connected to the cathode of the fourth diode D4, and is also connected to the drain of the fourth power device Q4 and the other end of the second winding V, and the other end of the second winding V is connected to the drains of the sixth power device Q6 and the seventh power device Q7. The other end of the sixth capacitor C6 is connected to the anode of the sixth diode D6 and to the source of the sixth power device Q6; one end of the sixth resistor R6 is connected to the cathode of the sixth diode D6 and the drain of the sixth power device Q6, and the source of the sixth power device Q6 is connected to the source of the eighth power device Q8 and one end of the third winding W. The other end of the seventh capacitor C7 is connected to the anode of the seventh diode D7 and to the source of the seventh power device Q7; one end of the seventh resistor R7 is connected to the cathode of the seventh diode D7 and the drain of the seventh power device Q7, and the source of the seventh power device Q7 is connected to the source of the eighth power device Q8 and the other end of the third winding W. The other end of the eighth capacitor C8 is connected to the anode of the eighth diode D8 and to the source of the eighth power device Q8; one end of the eighth resistor R8 is connected to the cathode of the eighth diode D8 and to the drain of the eighth power device Q8. The other end of the fifth capacitor C5 is connected to the anode of the fifth diode D5, and is also connected to the source of the fifth power device Q5 and one end of the third winding W; one end of the fifth resistor R5 is connected to the cathode of the fifth diode D5, and is also connected to the drain of the fifth power device Q5 and one end of the winding U.
The standby winding module 2 has the same circuit with the main winding module, namely comprises a first winding U ', a second winding V ' and a third winding W '; a first capacitor C1 ', a second capacitor C2', a third capacitor C3 ', a fourth capacitor C4', a fifth capacitor C5 ', a sixth capacitor C6', a seventh capacitor C7 ', and an eighth capacitor C8'; a first resistor R1 ', a second resistor R2', a third resistor R3 ', a fourth resistor R4', a fifth resistor R5 ', a sixth resistor R6', a seventh resistor R7 'and an eighth resistor R8'; a first diode D1 ', a second diode D2', a third diode D3 ', a fourth diode D4', a fifth diode D5 ', a sixth diode D6', a seventh diode D7 ', an eighth diode D8'; a first power device Q1 ', a second power device Q2', a third power device Q3 ', a fourth power device Q4', a fifth power device Q5 ', a sixth power device Q6', a seventh power device Q7 ', and an eighth power device Q8'. The first to eighth power devices may be MOS transistors (metal-oxide semiconductor field effect transistors), each power device includes a gate G ', a source, and a drain, that is, the first to eighth power devices include a first gate G1', a first source, and a first drain, respectively; a second gate G2', a second source, and a second drain; a third gate G3', a third source, and a third drain; a fourth gate G4', a fourth source, and a fourth drain; a fifth gate G5', a fifth source, and a fifth drain; a sixth gate G6', a sixth source, and a sixth drain; a seventh gate G7', a seventh source, a seventh drain; an eighth gate G8', an eighth source, and an eighth drain.
One end of a first capacitor C1 ' is connected with a first resistor R1 ', and the other end of the first capacitor C1 ' is connected with the anode of a first diode D1 ' and the source of a first power device Q1 '; one end of the first resistor R1 ' is connected to the cathode of the first diode D1 ' and to the drain of the first power device Q1 '. The source of the first power device Q1 'is connected to one end of the first winding U', the drain of the first power device Q1 'is connected to the other end of the first winding U', and is connected to the drains of the second power device Q2 'and the third power device Q3'. One end of a second capacitor C2 ' is connected with a second resistor R2 ', and the other end of the second capacitor C2 ' is connected with the anode of a second diode D2 ' and is also connected with the source of a second power device Q2 '; one end of the second resistor R2 ' is connected to the cathode of the second diode D2 ' and to the drain of the second power device Q2 ', and the source of the second power device Q2 ' is connected to the source of the fourth power device Q4 '. One end of a third capacitor C3 ' is connected with a third resistor R3 ', and the other end of the third capacitor C3 ' is connected with the anode of a third diode D3 ' and is also connected with the source of a third power device Q3 '; one end of the third resistor R3 ' is connected to the cathode of the third diode D3 ' and to the drain of the third power device Q3 '. The source of the third power device Q3 'is connected to the drain of the fourth power device Q4'. One end of a fourth capacitor C4 'is connected with a fourth resistor R4', and the other end of the fourth capacitor C4 'is connected with the anode of a fourth diode D4', and is connected with the source of a fourth power device Q4 'and one end of a second winding V'; one end of the fourth resistor R4 ' is connected to the cathode of the fourth diode D4 ', and is also connected to the drain of the fourth power device Q4 ' and the other end of the second winding V ', and the other end of the second winding V ' is connected to the drains of the sixth power device Q6 ' and the seventh power device Q7 '. The other end of the sixth capacitor C6 ' is connected with the anode of the sixth diode D6 ' and is also connected with the source of the sixth power device Q6 '; one end of the sixth resistor R6 'is connected to the cathode of the sixth diode D6', and to the drain of the sixth power device Q6 ', and the source of the sixth power device Q6' is connected to the source of the eighth power device Q8 'and one end of the third winding W'. The other end of the seventh capacitor C7 ' is connected with the anode of the seventh diode D7 ' and is also connected with the source of the seventh power device Q7 '; one end of the seventh resistor R7 'is connected to the cathode of the seventh diode D7', and to the drain of the seventh power device Q7 ', and the source of the seventh power device Q7' is connected to the source of the eighth power device Q8 'and the other end of the third winding W'. The other end of the eighth capacitor C8 ' is connected to the anode of the eighth diode D8 ' and to the source of the eighth power device Q8 '; one end of the eighth resistor R8 ' is connected to the cathode of the eighth diode D8 ' and to the drain of the eighth power device Q8 '. The other end of the fifth capacitor C5 'is connected with the anode of the fifth diode D5', and is also connected with the source of the fifth power device Q5 'and one end of the third winding W'; one end of the fifth resistor R5 'is connected to the cathode of the fifth diode D5', and is also connected to the drain of the fifth power device Q5 'and one end of the winding U'.
In addition, as shown in fig. 1, in the multifunctional motor control circuit, the control module is connected to the bridge arm module, and the bridge arm module is connected to the first winding U, the second winding V, and the third winding W of the main winding module, and is also connected to the first winding U ', the second winding V ', and the third winding W ' of the standby winding module, as shown in fig. 2, the control module is connected to the first gate G1, the second gate G2, the third gate G3, the fourth gate G4, the fifth gate G5, the sixth gate G6, the seventh gate G7, and the eighth gate G8 of the main winding module, and is also connected to the first gate G1 ', the second gate G2 ', the third gate G3 ', the fourth gate G4 ', the fifth gate G5 ', the sixth gate G6 ', the seventh gate G7 ', and the eighth gate G8 ' of the standby winding module.
In the multifunctional motor control circuit, a resistor and a capacitor form a filter unit, namely, a first resistor and a first capacitor form a first filter unit, a second resistor and a second capacitor form a second filter unit, a third resistor and a third capacitor form a third filter unit, a fourth resistor and a fourth capacitor form a fourth filter unit, a fifth resistor and a fifth capacitor form a fifth filter unit, a sixth resistor and a sixth capacitor form a sixth filter unit, a seventh resistor and a seventh capacitor form a seventh filter unit, and an eighth resistor and an eighth capacitor form an eighth filter unit. When the winding is switched, the filtering element can absorb the surge current of the switching to prevent the winding from being broken down.
The first diode to the eighth diode are mainly used for directional absorption, so that reverse current on a coil on a motor winding is guaranteed to have a discharge loop, the motor is protected, and the service life of the motor is prolonged.
As shown in fig. 3, the multifunctional motor control method of the present invention includes the following steps:
and S1, detecting the running state of the motor in real time.
S2, judging the running state of the main winding module, when the main winding module of the motor is normal, controlling the main winding by the bridge arm module to provide current for the main winding module, sending commands to a first power device Q1 'to an eighth power device Q8' of the standby winding module by the control module, closing the first power device Q1 ', a fourth power device Q4' and an eighth power device Q8 'of the standby winding module, and opening a second power device Q2', a third power device Q3 ', a fifth power device Q5', a sixth power device Q6 'and a seventh power device Q7' of the standby winding module; when a main winding module of the motor is abnormal, the bridge arm module controls the standby winding module to provide current for the standby winding module, and simultaneously the control module sends commands to the first power device Q1 to the eighth power device Q8 of the main winding module, closes the first power device Q1, the fourth power device Q4 and the eighth power device Q8 of the main winding module, and opens the second power device Q2, the third power device Q3, the fifth power device Q5, the sixth power device Q6 and the seventh power device Q7 of the main winding module.
And S3, detecting the rotating speed of the motor in real time.
S4, judging the rotating speed of the motor, when the rotating speed of the motor runs at a low speed (namely the rotating speed of the motor is less than 5% of the rated rotating speed), controlling the main winding module or the standby winding module to be switched into star connection by the control module, sending commands to first power devices to eighth power devices of the main winding module or the standby winding module by the control module, opening the first power devices, the second power devices, the fourth power devices, the fifth power devices, the sixth power devices and the eighth power devices, and closing the third power devices and the seventh power devices; when the rotating speed of the motor runs at a low speed (namely the rotating speed of the motor is greater than 5% of the rated rotating speed), the control module controls the main winding module or the standby winding module to be switched into triangular connection, the control module sends commands to the first power device to the eighth power device of the main winding module or the standby winding module, the first power device, the third power device, the fourth power device, the seventh power device and the eighth power device are turned on, and the second power device, the fifth power device and the sixth power device are turned off.
And S5, continuously detecting the running state of the motor and the rotating speed of the motor in real time.
It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A multi-function motor control circuit, comprising:
the main winding module is used for converting a star winding and a triangular winding of the motor;
the bridge arm module is used for amplifying the power of the main winding module and supplying current to the main winding module;
the control module is used for detecting the real-time state of the motor, controlling the main winding module and the bridge arm module and realizing the conversion between the star winding and the triangular winding of the main winding module;
wherein:
the control module is connected with the bridge arm module, the main winding module is provided with a first winding, a second winding, a third winding and first to eighth power devices, the first to eighth power devices respectively comprise a first grid to an eighth grid, a first source to an eighth source and a first drain to an eighth drain, the first grid to the eighth grid are connected with the control module, one end of the first winding is connected with the first source, the fifth drain and the bridge arm module, the other end of the first winding is connected with the first drain, the second drain and the third drain, one end of the second winding is connected with the second source and the fourth source, the bridge arm module is connected, the other end of the second winding is connected with the third source electrode, the fourth drain electrode, the sixth drain electrode and the seventh drain electrode, one end of the third winding is connected with the sixth source electrode, the eighth source electrode and the bridge arm module, and the other end of the third winding is connected with the fifth source electrode, the seventh source electrode and the eighth drain electrode.
2. The multifunctional motor control circuit according to claim 1, wherein the main winding module further comprises a first filtering unit to an eighth filtering unit, and two ends of the first filtering unit to the eighth filtering unit are respectively connected to the first source electrode to the eighth source electrode and the first drain electrode to the eighth drain electrode, so as to absorb surge current during winding switching.
3. The multi-functional motor control circuit of claim 2, wherein the first through eighth filter units respectively include first through eighth capacitors and first through eighth resistors, one ends of the first through eighth capacitors are connected to one ends of the first through eighth resistors, the other ends of the first through eighth capacitors are connected to the first through eighth sources, and the other ends of the first through eighth resistors are connected to the first through eighth drains.
4. The multifunctional motor control circuit according to claim 1, wherein the main winding module further comprises first to eighth freewheeling diodes, anodes of the first to eighth freewheeling diodes are connected to the first to eighth sources, respectively, and cathodes of the first to eighth freewheeling diodes are connected to the first to eighth drains, respectively, for absorbing reverse current on the winding coil.
5. The multifunctional motor control circuit of claim 1, wherein the first to eighth power devices are first to eighth MOS transistors.
6. The multifunctional motor control circuit of claim 1, wherein the bridge arm module is a main circuit formed by power devices.
7. The multifunctional motor control circuit according to any one of claims 1 to 6, further comprising a backup winding module having the same circuit as the main winding module for redundancy backup of the main winding module; the bridge arm module is also used for amplifying the power of the standby winding module and providing current for the standby winding module; the control module is also used for controlling the main winding module, the standby winding module and the bridge arm module to realize the switching between the main winding module and the standby winding module, and controlling the standby winding module and the bridge arm module to realize the conversion between the star winding and the triangular winding of the standby winding module.
8. A multifunctional motor control method is characterized by comprising the following steps:
s1, detecting the running state of the motor in real time;
s2, judging the running state of the main winding module, when the main winding module of the motor is normal, controlling the main winding by the bridge arm module to provide current for the main winding module, and disconnecting the standby winding module by the control module;
s3, detecting the rotating speed of the motor in real time;
s4, judging the rotating speed of the motor, when the rotating speed of the motor is less than 5% of the rated rotating speed, controlling the main winding module or the standby winding module to be switched into star connection by the control module, and when the rotating speed of the motor is more than 5% of the rated rotating speed, controlling the main winding module or the standby winding module to be switched into delta connection by the control module;
and S5, continuously detecting the running state of the motor and the rotating speed of the motor in real time.
9. The multifunctional motor control method of claim 8, wherein the method for the control module to disconnect the standby winding module is to close the first power device, the fourth power device and the eighth power device of the standby winding module, open the second power device, the third power device, the fifth power device, the sixth power device and the seventh power device of the standby winding module; the method for the control module to disconnect the main winding module comprises the steps of closing the first power device, the fourth power device and the eighth power device of the main winding module, and opening the second power device, the third power device, the fifth power device, the sixth power device and the seventh power device of the main winding module.
10. The multifunctional motor control method according to claim 8, wherein the method for the control module to control the main winding module or the standby winding module to be switched to the star connection is to turn on the first power device, the second power device, the fourth power device, the fifth power device, the sixth power device, the eighth power device, and turn off the third power device and the seventh power device; the method for controlling the main winding module or the standby winding module to be switched into the triangular connection by the control module is to turn on the first power device, the third power device, the fourth power device, the seventh power device and the eighth power device and turn off the second power device, the fifth power device and the sixth power device.
CN202110664932.6A 2021-06-16 2021-06-16 Multifunctional motor control circuit and control method Pending CN113300660A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105391366A (en) * 2015-12-23 2016-03-09 北京精密机电控制设备研究所 Structure-changeable motor system
CN106712641A (en) * 2017-03-06 2017-05-24 上海理工大学 Motor drive fault-tolerant control device and electric device
CN108023524A (en) * 2017-12-08 2018-05-11 合肥工业大学 The open PMSM Drive System of winding and winding switchover policy
CN207535723U (en) * 2017-09-26 2018-06-26 江苏雅迪科技发展有限公司宁波分公司 The arrangements for speed regulation of electric vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105391366A (en) * 2015-12-23 2016-03-09 北京精密机电控制设备研究所 Structure-changeable motor system
CN106712641A (en) * 2017-03-06 2017-05-24 上海理工大学 Motor drive fault-tolerant control device and electric device
CN207535723U (en) * 2017-09-26 2018-06-26 江苏雅迪科技发展有限公司宁波分公司 The arrangements for speed regulation of electric vehicle
CN108023524A (en) * 2017-12-08 2018-05-11 合肥工业大学 The open PMSM Drive System of winding and winding switchover policy

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Application publication date: 20210824