WO2021195945A1 - 一种多电机驱动电路及其控制方法 - Google Patents

一种多电机驱动电路及其控制方法 Download PDF

Info

Publication number
WO2021195945A1
WO2021195945A1 PCT/CN2020/082382 CN2020082382W WO2021195945A1 WO 2021195945 A1 WO2021195945 A1 WO 2021195945A1 CN 2020082382 W CN2020082382 W CN 2020082382W WO 2021195945 A1 WO2021195945 A1 WO 2021195945A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching tube
motor
bridge arm
tube
drive bridge
Prior art date
Application number
PCT/CN2020/082382
Other languages
English (en)
French (fr)
Inventor
张智敏
黄鑫
刘晓康
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/082382 priority Critical patent/WO2021195945A1/zh
Priority to CN202080005493.1A priority patent/CN112789800A/zh
Publication of WO2021195945A1 publication Critical patent/WO2021195945A1/zh

Links

Images

Classifications

    • 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
    • H02P5/00Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/68Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more dc dynamo-electric motors
    • 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
    • H02P5/00Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors

Definitions

  • the embodiments of the present application relate to the field of electricity, and in particular to a multi-motor drive circuit and a control method thereof.
  • the motor controller is generally composed of a control unit and a drive unit.
  • the control unit includes a power module, a main control chip, a communication circuit, etc.; drive The unit includes a power drive circuit and so on.
  • the controller of each motor is integrated on the motor body and communicates with other controllers through communication cables.
  • the number of motors increases, the number of controllers and wiring harnesses increases, which increases the cost and volume.
  • an integrated motor controller program appeared.
  • the general solutions mostly integrate the control unit, that is, multiple motors share one control unit, but there are fewer integration solutions for the drive unit, and the integration of the drive unit has become an urgent problem to be solved.
  • the embodiments of the present application provide a multi-motor drive circuit and a control method thereof, which are used to integrate a drive unit of the motor, and reduce the number of components and the cost and volume of the drive unit.
  • the first aspect of the embodiments of the present application provides a multi-motor drive circuit, including:
  • the multi-motor drive circuit includes at least three motors and at least three drive bridge arms.
  • a plurality of drive bridge arms are connected in parallel, connected in parallel with a DC power supply, and then connected to the motor.
  • the DC power supply provides DC power to the circuit and drives the bridge arms. It is based on the conduction state of the switch tube on the bridge arm to provide current to the motor, and the conduction state of the switch tube is controlled by the control unit; the connection relationship between the drive bridge arm and the motor satisfies, every two motors Both power interfaces can share bridge arms, but the drive bridge arms connected to two motors cannot be completely the same, that is, at least two drive bridge arms connected to at least two power interfaces of one motor and at least two power interfaces of another motor respectively. At least two drive bridge arms must be connected, and at least one drive bridge arm must be different.
  • each motor is controlled by an independent drive bridge arm.
  • a drive bridge arm shared by every two motors can reduce the number of drive bridge arms, which will reduce the number of components and The volume and cost of the entire drive circuit.
  • the motor in the multi-motor system can be a stepper motor or a DC motor, where each motor includes two power interfaces; since each drive bridge arm can be connected to multiple motors, then if the multi-motor drive circuit includes the first When the motor, the second motor and the third motor, three drive bridge arms can be used to drive them, namely the first drive bridge arm, the second drive bridge arm and the third drive bridge arm; among them, the first motor’s
  • the first power interface is connected to the first drive bridge arm
  • the second power interface of the first motor is connected to the second drive bridge arm
  • the third power interface of the second motor is connected to the first drive bridge arm
  • the fourth power interface of the second motor is connected
  • the fifth power interface of the third motor is connected to the second drive bridge arm
  • the sixth power interface of the third motor is connected to the third drive bridge arm.
  • the three motors include a total of six power interfaces, and each power interface requires a drive bridge arm to drive it. If an independent drive bridge arm is used to drive the motor, six drive bridge arms are required. When the motors share one drive bridge arm, the drive circuit of the multi-motor system only needs three drive bridge arms. In this way, the drive bridge arms are reduced by half and resources are saved.
  • Each driving bridge arm is composed of two switching tubes.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series.
  • the third drive bridge arm includes a fifth switch tube and a sixth switch tube connected in series; since the first drive bridge arm, the second drive bridge arm, and the third drive bridge arm are all connected in parallel with the DC power supply, the first switch tube and the The third switch tube and the fifth switch tube are respectively connected to the positive pole of the DC power supply, and the second switch tube, the fourth switch tube and the sixth switch tube are respectively connected to the negative pole of the DC power supply; the first power interface of the first motor is connected to the first switch The middle point of the tube and the second switch tube, the second power interface of the first motor is connected to the middle point of the third switch tube and the fourth switch tube, and the third power interface of the second motor is connected to the first switch tube and the second switch tube
  • the fourth power interface of the second motor is connected to the middle point of
  • the control unit drives the motor to work by controlling the conduction state of the switch tube on each drive bridge arm. Although multiple motors can share the drive bridge arm, in the same time period, one drive bridge arm can only drive one motor. Can not work on two motors at the same time; specifically, in the first time period, the control unit controls the first drive bridge arm and the second drive bridge arm to provide current to the first motor, where the first switch tube and the second switch tube One switch tube provides current for the first motor, one of the third switch tube and the fourth switch tube provides current for the first motor, and the fifth switch tube and the sixth switch tube are turned off; in the second time period, The control unit controls the first drive bridge arm and the third drive bridge arm to provide current for the second motor, wherein one of the first switch tube and the second switch tube provides current for the second motor, and the fifth switch tube and the first switch tube provide current for the second motor.
  • One of the six switching tubes provides current for the second motor, and the third switching tube and the fourth switching tube are disconnected; in the third period, the control unit controls the second drive bridge arm and the third drive bridge arm to be the third The motor provides current.
  • the control unit controls the second drive bridge arm and the third drive bridge arm to be the third The motor provides current.
  • one of the third switching tube and the fourth switching tube provides current for the third motor
  • one of the fifth switching tube and the sixth switching tube provides current for the third motor.
  • the switching tube and the second switching tube are disconnected.
  • the control unit controls the switch tubes on all drive bridge arms corresponding to one motor at the same time period, and disconnects all the switch tubes on other drive bridge arms. This can ensure that multiple motors sharing the bridge arm work in different time periods and are mutually exclusive. It affects its work and ensures the independent work of multiple motors sharing the bridge arm.
  • the multi-motor drive circuit can include multiple groups of drive bridge arms, that is, the multi-motor drive circuit also includes a third drive bridge arm.
  • the fourth drive bridge arm, the fifth drive bridge arm and the sixth drive bridge arm are also connected in parallel with the DC power supply.
  • the fourth drive bridge arm includes a series connection
  • the fifth driving bridge arm includes the ninth switching tube and the tenth switching tube connected in series
  • the sixth driving bridge arm includes the eleventh switching tube and the twelfth switching tube connected in series.
  • the switching tube, the ninth switching tube and the eleventh switching tube are respectively connected to the positive pole of the DC power supply
  • the eighth switching tube, the tenth switching tube and the twelfth switching tube are respectively connected to the negative pole of the DC power supply.
  • the seventh power interface of the fourth motor is connected to the middle point of the seventh switch tube and the eighth switch tube, and the eighth power interface of the fourth motor is connected to the middle point of the ninth switch tube and the tenth switch tube.
  • the ninth power port of the fifth motor is connected to the middle point of the seventh switch tube and the eighth switch tube, and the tenth power port of the fifth motor is connected to the middle point of the eleventh switch tube and the twelfth switch tube.
  • the eleventh power interface of the sixth motor is connected to the middle point of the ninth switching tube and the tenth switching tube, and the twelfth power interface of the sixth motor is connected to the middle point of the eleventh switching tube and the twelfth switching tube.
  • the driving circuit can be composed of three driving bridge arms and three DC motors as a group, wherein the three motors share one driving bridge arm in pairs, which makes the integration of the driving circuit higher and reduces the volume of the driving unit more effectively.
  • the two motors that do not share the drive bridge arm can work at the same time in the same time period. Therefore, the control unit can control the drive bridge arms in different groups to provide current to the motors of different groups; specifically, the control unit controls the first drive arm in the same time period.
  • the conduction state of the switch tubes of the drive bridge arm and the second drive bridge arm provides current for the first motor, while the conduction state of the switch tubes controlling the fourth drive bridge arm and the fifth drive bridge arm provides the fourth motor Current; Among them, one of the first switching tube and the second switching tube provides current for the first motor, one of the third switching tube and the fourth switching tube provides current for the first motor, and the seventh switching tube One of the eighth and eighth switching tubes provides current for the fourth motor, and one of the ninth and eighth switching tubes provides current for the fourth motor, and the other switching tubes are all turned off.
  • the control unit controls the conduction state of the switch tubes of the drive bridge arms in different groups, so that multiple motors that do not share the drive bridge arms can work at the same time, which can avoid the disadvantages that the motors cannot work at the same time in the multi-motor system, and provide a new Multi-motor working mode.
  • the switch tube includes a semiconductor device, and the semiconductor device includes an insulated gate bipolar transistor IGBT and/or a triode and its anti-parallel diode and/or a metal-oxide semiconductor field effect transistor MOSFET.
  • the motor in a multi-motor system can also be a three-phase motor, where each motor includes three power interfaces; a preferred solution is that each drive bridge arm needs to be connected to two motors, and every two three-phase motors share the same One drive bridge arm, if the multi-motor drive circuit includes a first three-phase motor, a second three-phase motor, a third three-phase motor, and a fourth three-phase motor, at least six drive bridge arms are required.
  • the first power interface of the first three-phase motor is connected to the first drive bridge arm, the second power interface of the first three-phase motor is connected to the second drive bridge arm, and the third power interface of the first three-phase motor is connected to the third drive Bridge arm;
  • the fourth power interface of the second three-phase motor is connected to the first drive bridge arm, the fifth power interface of the second three-phase motor is connected to the fourth drive bridge arm, and the sixth power interface of the second three-phase motor is connected to the fifth Drive bridge arm;
  • the seventh power interface of the third three-phase motor is connected to the second drive bridge arm, the eighth power interface of the third three-phase motor is connected to the fourth drive bridge arm, and the ninth power interface of the third three-phase motor is connected to the second drive bridge.
  • Three-phase motors include a total of twelve interfaces, and each interface requires a drive bridge arm to drive it. If an independent drive bridge arm is used to drive the motor, twelve drive bridge arms are required. When two motors share one drive bridge arm, the drive circuit of the multi-motor system only needs six drive bridge arms. In this way, the drive bridge arms are reduced by half and resources are saved.
  • Each drive bridge arm includes two diodes connected in series, and each drive bridge arm is connected in parallel with the DC power supply. Therefore, from the first drive bridge arm to the sixth drive bridge arm, it includes the first switch tube to the tenth drive bridge arm.
  • Two switching tubes among them, the first switching tube, the third switching tube, the fifth switching tube, the seventh switching tube, the ninth switching tube and the eleventh switching tube are respectively connected to the positive pole of the DC power supply; the second switching tube and the first switching tube
  • the four switching tubes, the sixth switching tube, the eighth switching tube, the tenth switching tube and the twelfth switching tube are respectively connected to the negative pole of the DC power supply; the middle point of the first switching tube and the second switching tube is the first of the driving circuit.
  • the output terminal, the middle point between the third switch tube and the fourth switch tube is the second output terminal, the middle point between the fifth switch tube and the sixth switch tube is the third output terminal, and the middle point between the seventh switch tube and the eighth switch tube Point is the fourth output terminal, the middle point between the ninth switch tube and the tenth switch tube is the fifth output terminal, and the middle point between the eleventh switch tube and the twelfth switch tube is the sixth output terminal.
  • the first power interface of the first three-phase motor is connected to the first output terminal
  • the second power interface of the first three-phase motor is connected to the second output terminal
  • the third power interface of the first three-phase motor is connected to the third output terminal.
  • the fourth power port of the second three-phase motor is connected to the first output port
  • the fifth power port of the second three-phase motor is connected to the fourth output port
  • the sixth power port of the second three-phase motor is connected to the fifth output port.
  • the seventh power port of the third three-phase motor is connected to the second output port, the eighth power port of the third three-phase motor is connected to the fourth output port, and the ninth power port of the third three-phase motor is connected to the sixth output port;
  • the tenth power port of the four-three-phase motor is connected to the third output port, the eleventh power port of the fourth three-phase motor is connected to the fifth output port, and the twelfth power port of the fourth three-phase motor is connected to the sixth output port.
  • connection method by controlling the conduction state of each switch tube on the bridge arm, the current flowing into each motor can be controlled, so that the drive circuit converts direct current into alternating current and provides it to the three-phase motor to ensure the normal operation of the three-phase motor.
  • the control unit drives the motor to work by controlling the conduction state of the switch tube on each drive bridge arm. Although multiple motors can share the drive bridge arm, in the same time period, one drive bridge arm can only drive one motor. It cannot work on multiple motors at the same time.
  • the control unit controls the conduction state of the switch tubes in the first drive bridge arm, the second drive bridge arm, and the third drive bridge arm in the first period to provide the first three-phase motor Alternating current; that is, one of the first switching tube and the second switching tube provides current for the first three-phase motor, and one of the third switching tube and the fourth switching tube provides current for the first three-phase motor.
  • One of the five switching tubes and the sixth switching tube provides current for the first three-phase motor, and the remaining switching tubes are all turned off.
  • the control unit controls the conduction state of the switch tubes in the first drive bridge arm, the fourth drive bridge arm and the fifth drive bridge arm in the second period to provide alternating current for the second three-phase motor; that is, the first switch tube and the second switch
  • One of the tubes provides current for the second three-phase motor
  • one of the seventh and eighth switching tubes provides current for the second three-phase motor
  • one of the ninth and tenth switching tubes The switching tube provides current for the second three-phase motor, and the remaining switching tubes are all disconnected.
  • the control unit controls the conduction state of the switch tubes in the second drive bridge arm, the fourth drive bridge arm and the sixth drive bridge arm in the third period to provide alternating current for the third three-phase motor; that is, the third switch tube and the fourth switch One switch tube in the tube provides current for the third three-phase motor, one of the seventh switch tube and the eighth switch tube provides current for the third three-phase motor.
  • the eleventh switch tube and the twelfth switch tube provide current for the third three-phase motor.
  • One switch tube provides current for the third three-phase motor, and the other switch tubes are all disconnected.
  • the control unit controls the conduction state of the switch tubes in the third drive bridge arm, the fifth drive bridge arm and the sixth drive bridge arm in the fourth period to provide alternating current for the fourth three-phase motor; that is, the fifth switch tube and the sixth switch
  • One of the switching tubes provides current for the fourth three-phase motor
  • one of the ninth switching tubes and the tenth switching tube provides current for the fourth three-phase motor
  • the eleventh switching tube and the twelfth switching tube provide current for the fourth three-phase motor.
  • One switch tube provides current for the fourth three-phase motor, and the other switch tubes are all off.
  • the control unit controls the switch tubes on all drive bridge arms corresponding to a three-phase motor at the same time period, and disconnects all the switch tubes on other drive bridge arms. This can ensure that multiple motors sharing the bridge arm work in different periods. They do not affect each other's work, which ensures the independent work of multiple motors sharing the bridge arm.
  • the multi-motor drive circuit can include multiple groups of drive bridge arms, that is, the multi-motor drive circuit also includes The seventh drive bridge arm, the eighth drive bridge arm, the ninth drive bridge arm, the tenth drive bridge arm, the eleventh drive bridge arm and the twelfth drive bridge arm are also connected in parallel with the DC power supply.
  • each driving bridge arm includes two switching tubes connected in series, that is, the seventh driving bridge arm to the twelfth driving bridge arm includes the thirteenth switching tube to the 24th switching tube; the thirteenth switching tube, the third The fifteenth switch tube, the seventeenth switch tube, the nineteenth switch tube, the 21st switch tube and the 23rd switch tube are respectively connected to the positive pole of the DC power supply.
  • the fourteenth switch tube, the sixteenth switch tube, The eighteenth switch tube, the 20th switch tube, the 22nd switch tube, and the 24th switch tube are respectively connected to the negative electrode of the DC power supply.
  • the middle point of the thirteenth switch tube and the fourteenth switch tube is the seventh output terminal
  • the middle point of the fifteenth switch tube and the sixteenth switch tube is the eighth output terminal
  • the seventeenth switch tube and the tenth switch tube are the eighth output terminal.
  • the middle point of the eighth switch tube is the ninth output terminal
  • the middle point of the nineteenth switch tube and the twentieth switch tube is the tenth output terminal
  • the middle point of the 21st switch tube and the 22nd switch tube is the No.
  • the eleventh output terminal, the middle point of the twenty-third switch tube and the twenty-fourth switch tube is the twelfth output terminal.
  • the thirteenth power port of the fifth and three-phase motor is connected to the seventh output port, the fourteenth power port of the fifth and three-phase motor is connected to the eighth output port, and the fifteenth power port of the fifth and three-phase motor Connect the ninth output terminal; the sixteenth power interface of the sixth three-phase motor connects to the seventh output terminal, the seventeenth power interface of the sixth three-phase motor connects to the tenth output terminal, and the eighteenth power supply of the sixth three-phase motor The interface is connected to the eleventh output terminal; the nineteenth power interface of the seventh three-phase motor is connected to the eighth output terminal, the twentieth power interface of the seventh three-phase motor is connected to the tenth output terminal, and the second of the seventh three-phase motor The eleventh power port is connected to the twelfth output port; the twenty-second power port of the eighth three-phase motor is connected to the ninth output port, the twenty-third power port of the eighth three-phase motor is connected to the eleventh output port, and the eighth The twenty-four
  • the driving circuit can be composed of six driving bridge arms and four three-phase motors. Four motors share one driving bridge arm in pairs, so that the integration of the driving circuit is higher, and the volume of the driving unit is more effectively reduced.
  • the control unit can control the drive bridge arms in different groups to provide current to the motors of different groups; specifically, the control unit controls the first drive bridge arm in the same time period.
  • the conduction states of the switching tubes of the first inverter bridge arm, the second inverter bridge arm and the third inverter bridge arm provide current for the first three-phase motor, and control the seventh inverter bridge arm and the eighth inverter bridge arm.
  • the conduction state of the switching tubes of the converter bridge arm and the ninth inverter bridge arm provides current for the fifth three-phase motor; that is, one of the first switching tube and the second switching tube is the first three-phase The motor provides current.
  • One of the third and fourth switching tubes provides current for the first three-phase motor
  • one of the fifth and sixth switching tubes provides current for the first three-phase motor
  • One of the thirteenth and fourteenth switching tubes provides current for the fifth and three-phase motor
  • one of the fifteenth and sixteenth switching tubes provides current for the fifth and third-phase motor.
  • One of the seventeenth switch tube and the eighteenth switch tube provides current for the fifth three-phase motor, and the seventh switch tube to the twelfth switch tube and the nineteenth switch tube to the twenty-fourth switch tube are all off open.
  • the control unit controls the conduction state of the switch tubes of the drive bridge arms in different groups, so that multiple motors that do not share the drive bridge arms can work at the same time, which can avoid the disadvantages that the motors cannot work at the same time in the multi-motor system, and provide a new Multi-motor working mode.
  • the switching device includes a semiconductor device, and the semiconductor device includes an insulated gate bipolar transistor IGBT and/or a triode and its anti-parallel diode and/or a metal-oxide semiconductor field effect transistor MOSFET.
  • a second aspect of the embodiments of the present application provides a driving bridge arm circuit, including:
  • the drive bridge arm circuit includes at least three drive bridge arms.
  • Each drive bridge arm can be connected to the interface of multiple motors, that is, multiple motors can be connected.
  • Each drive bridge arm is connected in parallel with the DC power supply.
  • the connection relationship needs to meet: the power interfaces of every two motors can share the bridge arms, but the drive bridge arms connected by the two motors cannot be completely the same, that is, at least two drive bridge arms connected to at least two power interfaces of a motor and At least two drive bridge arms respectively connected to at least two power interfaces of another motor, at least one different drive bridge arm must exist.
  • each power interface of the motor needs a separate drive bridge arm, and each drive bridge arm is only connected to one power interface of a motor.
  • the drive bridge arm circuit can be connected to multiple motors, the motors can be shared.
  • Drive bridge arms which can reduce the number of drive bridge arms in the drive circuit, reduce the number of components, and save resources.
  • the drive bridge arm may include a first drive bridge arm, a second drive bridge arm, and a third drive bridge arm.
  • the motors include a first motor, a second motor and a third motor. All three motors include two power interfaces; one In a preferred solution, the first output end of the first drive bridge arm is connected to the first power interface of the first motor and the third power interface of the second motor, and the second output end of the second drive bridge arm is connected to the second power interface of the first motor.
  • the power interface is connected to the fifth power interface of the third motor, and the third output terminal of the third drive bridge arm is connected to the fourth power interface of the second motor and the sixth power interface of the third motor.
  • the three motors include a total of six interfaces, and each interface requires a drive bridge arm to drive it. If an independent drive bridge arm is used to drive the motor, six drive bridge arms are required. When every two motors share In the case of one drive bridge arm, the drive circuit of the multi-motor system only needs three drive bridge arms. In this way, the drive bridge arms are reduced by half and resources are saved.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes a fifth switching tube and a second switching tube connected in series.
  • Six switching tubes wherein the first switching tube, the third switching tube and the fifth switching tube are respectively connected to the positive pole of the DC power supply, and the second switching tube, the fourth switching tube and The sixth switch tube is respectively connected to the negative electrode of the DC power supply
  • the middle point of the first switch tube and the second switch tube is the first output terminal
  • the middle point of the four switching tubes is the second output terminal
  • the middle point of the fifth switching tube and the sixth switching tube is the third output terminal.
  • the driving bridge arm circuit is controlled by a control unit, and the control unit is specifically configured to control the conduction state of the first switching tube, the second switching tube, the third switching tube, and the fourth switching tube in the first period to provide current for the first motor; Among them, one of the first switching tube and the second switching tube provides current for the first motor, one of the third switching tube and the fourth switching tube provides current for the first motor, the fifth switching tube and the first switching tube provide current for the first motor.
  • the six switch tube is disconnected.
  • the control unit is also used to control the conduction state of the first switching tube, the second switching tube, the fifth switching tube, and the sixth switching tube in the second period to provide current for the second motor; wherein, the first switching tube and the second switching tube One of the switching tubes provides current for the second motor, one of the fifth switching tube and the sixth switching tube provides current for the second motor, and the third switching tube and the fourth switching tube are disconnected.
  • the control unit is also used to control the conduction state of the third switching tube, the fourth switching tube, the fifth switching tube, and the sixth switching tube in the third period to provide current for the third motor; among them, the third switching tube and the fourth switching tube One of the switching tubes provides current for the third motor, one of the fifth switching tubes and the sixth switching tube provides current for the third motor, and the first switching tube and the second switching tube are disconnected.
  • the control unit controls the switch tubes on all drive bridge arms corresponding to one motor at the same time period, and disconnects all the switch tubes on other drive bridge arms. This can ensure that multiple motors sharing the bridge arm work in different time periods and are mutually exclusive. It affects its work and ensures the independent work of multiple motors sharing the bridge arm.
  • a preferred solution is that three three-phase motors share six drive bridge arms, and the drive bridge arms include the first drive bridge arm and the second drive bridge arm.
  • the third drive bridge arm, the fourth drive bridge arm, the fifth drive bridge arm and the sixth drive bridge arm, the three motors are the first three-phase motor, the second three-phase motor and the third three-phase motor.
  • the first output end of the first drive bridge arm is connected to the first power interface of the first three-phase motor and the fourth power interface of the second three-phase motor; the second output end of the second drive bridge arm is connected to the first three-phase The second power interface of the motor and the seventh power interface of the third three-phase motor; the third output terminal of the third drive bridge arm is connected to the third power interface of the first three-phase motor and the tenth power interface of the three-phase motor; The fourth output end of the four drive bridge arm is connected to the fifth power interface of the second three-phase motor and the eighth power interface of the third three-phase motor; the fifth output end of the fifth drive bridge arm is connected to the second three-phase motor’s Six power supply ports and the eleventh power supply port of the fourth three-phase motor; the sixth output end of the sixth drive bridge arm is connected to the ninth power port of the third three-phase motor and the twelfth power supply of the fourth three-phase motor interface.
  • Three-phase motors include a total of twelve interfaces, and each interface requires a drive bridge arm to drive it. If an independent drive bridge arm is used to drive the motor, twelve drive bridge arms are required. When two motors share one drive bridge arm, the drive circuit of the multi-motor system only needs six drive bridge arms. In this way, the drive bridge arms are reduced by half and resources are saved.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes a fifth switching tube and a second switching tube connected in series.
  • Six switching tubes, the fourth driving bridge arm includes a seventh switching tube and an eighth switching tube connected in series, the fifth driving bridge arm includes a ninth switching tube and a tenth switching tube connected in series, and the sixth driving bridge arm includes a tenth switching tube connected in series.
  • the first switching tube, the third switching tube, the fifth switching tube, the seventh switching tube, the ninth switching tube and the eleventh switching tube are respectively connected to the positive pole of the DC power supply
  • the sixth switch tube, the eighth switch tube, the tenth switch tube, and the twelfth switch tube are respectively connected to the negative electrode of the DC power supply.
  • the middle point of the first switch tube and the second switch tube is the first output terminal
  • the third switch tube The middle point between the fourth switch tube and the fourth switch tube is the second output terminal, the middle point between the fifth switch tube and the sixth switch tube is the third output terminal, and the middle point between the seventh switch tube and the eighth switch tube is the fourth output terminal.
  • the middle point between the ninth switch tube and the tenth switch tube is the fifth output terminal
  • the middle point between the eleventh switch tube and the twelfth switch tube is the sixth output terminal.
  • the drive bridge arm circuit is controlled by the control unit, and the control unit controls the conduction state of the first drive bridge arm, the drive bridge arm and the switch tubes in the drive bridge arm in the first period to provide alternating current for the first three-phase motor;
  • One of the switching tube and the second switching tube provides current for the first three-phase motor, and one of the third switching tube and the fourth switching tube provides current for the first three-phase motor.
  • the fifth switching tube and the third switching tube provide current for the first three-phase motor.
  • One of the six switching tubes provides current for the first three-phase motor, and the seventh, eighth, ninth, tenth, eleventh, and twelfth switching tubes are disconnected .
  • the control unit controls the conduction state of the switch tubes in the first drive bridge arm, the fourth drive bridge arm and the fifth drive bridge arm in the second period to provide alternating current for the second three-phase motor; wherein, the first switch tube and the second drive bridge arm One of the switching tubes provides current for the second three-phase motor. One of the seventh and eighth switching tubes provides current for the second three-phase motor. The ninth and tenth switching tubes provide current for the second three-phase motor. A switching tube provides current for the second three-phase motor, and the third switching tube, the fourth switching tube, the fifth switching tube, the sixth switching tube, the eleventh switching tube, and the twelfth switching tube are disconnected.
  • the control unit controls the conduction state of the switch tubes in the second drive bridge arm, the fourth drive bridge arm and the sixth drive bridge arm in the third period to provide alternating current for the third three-phase motor; among them, the third switch tube and the fourth drive bridge arm
  • One of the switching tubes provides current for the third three-phase motor
  • one of the seventh and eighth switching tubes provides current for the third three-phase motor
  • the eleventh switching tube and the twelfth switching tube One of the switching tubes provides current for the third three-phase motor, and the first switching tube, the second switching tube, the fifth switching tube, the sixth switching tube, the ninth switching tube and the tenth switching tube are disconnected.
  • the control unit controls the conduction state of the switch tubes in the third drive bridge arm, the fifth drive bridge arm and the sixth drive bridge arm in the fourth period to provide alternating current for the fourth three-phase motor; among them, the fifth switch tube and the sixth drive bridge arm
  • One of the switching tubes provides current for the fourth three-phase motor
  • one of the ninth switching tubes and the tenth switching tube provides current for the fourth three-phase motor
  • One of the switching tubes provides current for the fourth three-phase motor, and the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the seventh switching tube and the eighth switching tube are disconnected.
  • the third aspect of the embodiments of the present application provides a control method of a multi-motor drive circuit, including:
  • the control unit determines the target drive bridge arm of the multi-motor drive circuit
  • the multi-motor drive circuit includes at least three motors and at least three drive bridge arms, the at least three drive bridge arms are connected in parallel, and the at least three drive bridge arms are connected in parallel with the DC power supply, and the at least three motors
  • Each motor includes at least two power interfaces, and the at least three drive bridge arms have a connection relationship with the at least three motors.
  • connection relationship satisfies: at least two drive bridge arms respectively connected to at least two power interfaces of motor i and at least two drive bridge arms respectively connected to at least two power interfaces of motor j, there is at least one that is different In the drive bridge arm, the motor i and the motor j are any two of the at least three motors.
  • control unit controls the conduction state of the switch tube in the target drive bridge arm, so that the target drive bridge arm provides current for the at least three motors in question.
  • the at least three drive bridge arms include a first drive bridge arm, a second drive bridge arm, and a third drive bridge arm.
  • the at least three motors include a first motor, a second motor and a third motor.
  • the first to third motors are all It includes two power interfaces; the first driving bridge arm includes a first switching tube and a second switching tube connected in series, the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series, and the third driving bridge arm includes a series connecting The fifth switch tube and the sixth switch tube.
  • the first switching tube, the third switching tube and the fifth switching tube are respectively connected to the positive pole of the DC power supply
  • the second switching tube, the fourth switching tube and the sixth switching tube are respectively connected to the negative pole of the DC power supply
  • the first switching tube is The middle point between the second switch tube and the second switch tube is the first output terminal
  • the middle point between the third switch tube and the fourth switch tube is the second output terminal
  • the middle point between the fifth switch tube and the sixth switch tube is the second output terminal.
  • the third output terminal is the third output terminal.
  • the first output terminal is connected to the first power interface of the first motor and the third power interface of the second motor
  • the second output terminal is connected to the second power interface of the first motor and the fifth power interface of the third motor.
  • the output end is connected to the fourth power interface of the second motor and the sixth power interface of the third motor.
  • the control unit controls the conduction state of the first switching tube to the sixth switching tube in the first period to provide current for the first motor; wherein, one of the first switching tube and the second switching tube provides current for the first motor , One of the third switching tube and the fourth switching tube provides current for the first motor, and the fifth switching tube and the sixth switching tube are disconnected.
  • the control unit controls the conduction state of the first switching tube to the sixth switching tube in the second period to provide current for the second motor; wherein, one of the first switching tube and the second switching tube provides current for the second motor , One of the fifth switching tube and the sixth switching tube provides current for the second motor, and the third switching tube and the fourth switching tube are disconnected.
  • the control unit controls the conduction state of the first switching tube to the sixth switching tube in the third period to provide current for the third motor; wherein, one of the third switching tube and the fourth switching tube provides current for the third motor , One of the fifth switching tube and the sixth switching tube provides current for the third motor, and the first switching tube and the second switching tube are disconnected.
  • the at least three drive bridge arms include the first drive bridge arm, the second drive bridge arm, the third drive bridge arm, the fourth drive bridge arm, the fifth drive bridge arm, and the sixth drive bridge arm.
  • the at least three motors include the first drive bridge arm.
  • the three-phase motor, the second three-phase motor and the third three-phase motor, and the first three-phase motor to the third three-phase motor all include three power interfaces.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes a fifth switching tube connected in series
  • the fourth driving bridge arm includes a seventh switching tube and an eighth switching tube connected in series
  • the fifth driving bridge arm includes a ninth switching tube and a tenth switching tube connected in series
  • the sixth driving bridge arm includes a series connection The eleventh switch tube and the twelfth switch tube.
  • the first switching tube, the third switching tube, the fifth switching tube, the seventh switching tube, the ninth switching tube and the eleventh switching tube are respectively connected to the positive pole of the DC power supply
  • the sixth switch tube, the eighth switch tube, the tenth switch tube, and the twelfth switch tube are respectively connected to the negative electrode of the DC power supply.
  • the middle point of the first switch tube and the second switch tube is the first output terminal
  • the third switch tube The middle point between the fourth switch tube and the fourth switch tube is the second output terminal, the middle point between the fifth switch tube and the sixth switch tube is the third output terminal, and the middle point between the seventh switch tube and the eighth switch tube is the fourth output terminal.
  • the middle point between the ninth switch tube and the tenth switch tube is the fifth output terminal
  • the middle point between the eleventh switch tube and the twelfth switch tube is the sixth output terminal.
  • the first output terminal is connected to the first power interface of the first three-phase motor and the fourth power interface of the second three-phase motor; the second output terminal is connected to the second power interface of the first three-phase motor and the third three-phase motor
  • the seventh power interface of the third output terminal is connected to the third power interface of the first three-phase motor and the tenth power interface of the three-phase motor;
  • the fourth output terminal is connected to the fifth power interface of the second three-phase motor and the third third third The eighth power port of the phase motor;
  • the fifth output port is connected to the sixth power port of the second three-phase motor and the eleventh power port of the fourth three-phase motor;
  • the sixth output port is connected to the ninth power supply of the third three-phase motor Interface and the twelfth power interface of the fourth three-phase motor.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the first period to provide alternating current for the first three-phase motor; among them, one of the first switching tube and the second switching tube is the first switching tube.
  • the three-phase motor provides current.
  • One of the third and fourth switching tubes provides current for the first three-phase motor, and one of the fifth and sixth switching tubes provides current for the first three-phase motor.
  • Current, the seventh switch tube, the eighth switch tube, the ninth switch tube, the tenth switch tube, the eleventh switch tube, and the twelfth switch tube are turned off.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the second period to provide alternating current for the second three-phase motor; among them, one of the first switching tube and the second switching tube is the second The three-phase motor provides current.
  • One of the seventh and eighth switching tubes provides current for the second three-phase motor, and one of the ninth and tenth switching tubes provides current for the second three-phase motor. With current, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, the eleventh switch tube, and the twelfth switch tube are turned off.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the third period to provide alternating current for the third three-phase motor; wherein, one of the third switching tube and the fourth switching tube is The third three-phase motor provides current, one of the seventh and eighth switching tubes provides current for the third three-phase motor, and one of the eleventh and twelfth switching tubes is the third The three-phase motor provides current, and the first switching tube, the second switching tube, the fifth switching tube, the sixth switching tube, the ninth switching tube, and the tenth switching tube are turned off.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the fourth period to provide alternating current for the fourth three-phase motor; among them, one of the fifth switching tube and the sixth switching tube is the fourth Three-phase motors provide current.
  • One of the ninth and tenth switching tubes provides current for the fourth three-phase motor.
  • One of the eleventh and twelfth switching tubes is the fourth three-phase.
  • the motor provides current, and the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the seventh switching tube, and the eighth switching tube are turned off.
  • the fourth aspect of the embodiments of the present application provides a control unit configured to execute the method according to any one of the third aspect to the fourth implementation manner of the third aspect of the embodiments of the present application.
  • a fifth aspect of the embodiments of the present application provides a vehicle, and the vehicle includes the multi-motor drive circuit according to any one of the first aspect to the twelfth implementation manner of the first aspect of the embodiments of the present application.
  • each drive bridge arm can be connected to multiple motors, and the drive bridge arms connected to the power interfaces of the two motors cannot be completely the same.
  • the drive unit is integrated to reduce the number of components and the cost and volume of the drive unit.
  • FIG. 1 is a schematic diagram of a scene of a multi-motor system provided in an embodiment of the application
  • FIG. 2 is a topology diagram of a multi-motor drive circuit provided in an embodiment of the application
  • 2A is an equivalent diagram of a multi-motor drive circuit provided by an embodiment of the application.
  • FIG. 3 is a topology diagram of another multi-motor drive circuit provided in an embodiment of the application.
  • FIG. 4 is a topology diagram of another multi-motor drive circuit provided by an embodiment of the application.
  • 4A is an equivalent diagram of another multi-motor drive circuit provided by an embodiment of the application.
  • FIG. 5 is a topology diagram of another multi-motor drive circuit provided by an embodiment of the application.
  • the embodiments of the present application provide a multi-motor drive circuit and a working method thereof, which are used to integrate a drive unit of a motor, and reduce the number of components and the cost and volume of the drive unit.
  • FIG. 1 is a schematic diagram of a scene of a multi-motor system provided by an embodiment of this application.
  • the number and types of executive motors used in electric vehicles are increasing, such as seat adjustment motors, thermal management system motors, door and window motors, etc.
  • the types of motors also include DC motors, stepping motors, three-phase motors, etc.
  • the controllers of these motors are integrated on the motor body and communicate with other controllers through communication cables. This leads to the need for a controller for each motor.
  • a motor controller is divided into a control unit and a drive unit.
  • the control unit includes a power module, a main control chip, a communication circuit, etc.
  • the drive unit includes a power drive circuit.
  • the control unit is used to generate control signals
  • the drive unit includes a drive circuit;
  • the basic task of the drive circuit is to convert the signal transmitted from the information electronic circuit into the control terminal and the common terminal of the power electronic device according to the requirements of its control target. In between, a signal that can be turned on or off.
  • only a turn-on control signal is required for a semi-control device, and both a turn-on control signal and a turn-off control signal are provided for a full-control device to ensure that the device can be turned on or off reliably.
  • the embodiment of the present application provides a multi-motor drive circuit.
  • the multi-motor drive circuit includes at least three motors and at least three drive bridge arms, wherein all the drive bridge arms are connected in parallel and are connected in parallel with a DC power supply.
  • the motor includes at least two power interfaces. Therefore, in order to integrate the drive circuit, the drive bridge arm is shared between different motors. Therefore, the connection relationship between the motor and the drive bridge arm should be such that every two motors share the drive bridge arm.
  • the drive bridge arms that are connected to the power interface of one motor and the drive bridge arms that are connected to the power interface of the other motor are not exactly the same, that is, at least two drive bridge arms and the motor are connected to at least two power interfaces of motor i.
  • At least two drive bridge arms respectively connected to at least two power interfaces of j there is at least one different drive bridge arm; in this way, the integration of the drive circuit can be realized while ensuring that each motor works independently.
  • a DC motor is a motor that converts DC power into mechanical energy.
  • the DC power supply supplies power to the armature winding through the brush, the current in the same direction can flow through the N-pole lower conductor of the armature surface, and the conductor will receive a counterclockwise torque at this time.
  • Function; part of the conductor under the S pole of the armature surface also flows in the same direction, and will also receive a counterclockwise torque. In this way, the entire armature winding will rotate clockwise, and the input DC power can be converted into Mechanical energy on the rotor shaft.
  • the principle of a single-phase stepper motor is similar to that of a DC motor. It only uses an electronic circuit to convert the DC power into a time-sharing power supply. Rotate a fixed angle in a fixed direction, and the rotation is run step by step at a fixed angle.
  • FIG. 2 is a topology diagram of the multi-motor drive circuit provided in this embodiment of the application.
  • the drive circuit includes a DC power supply, three DC motors or stepper motors, and three drive bridge arms.
  • Each drive bridge arm includes two series switching tubes, and each drive bridge arm is connected to the DC
  • the power supplies are connected in parallel, and three motors are connected to the drive bridge arm; among them, each drive bridge arm is shared by two motors, and a drive bridge arm is shared between every two motors.
  • the DC power supply is used to provide DC power to the drive bridge arm, and the drive bridge arm transforms the DC power provided by the DC power supply by changing the conduction state of each switch tube, and then provides current for each motor to ensure the normal operation of each motor Work.
  • the two power interfaces of the first motor M1 are connected to the first drive bridge arm and the second drive bridge arm
  • the two power interfaces of the second motor M2 are connected to the first drive bridge arm and the third drive bridge arm
  • the third motor M3 The two power interfaces of the drive bridge arm are connected to the second drive bridge arm and the third drive bridge arm
  • the specific connection method is that one power interface of the first motor M1 is connected to the midpoint of the two switch tubes of the first drive bridge arm, and the first motor
  • the other power interface of M1 is connected to the middle point of the two switch tubes of the second drive bridge arm
  • one power interface of the second motor M2 is connected to the middle point of the two switch tubes of the first drive bridge arm
  • the other of the second motor M2 A power interface is connected to the middle point of the two switch tubes of the third drive arm
  • a power interface of the third motor M3 is connected to the middle point of the two switch tubes of the second drive arm, and the other power interface of the third motor M3 Connected to the middle point of the
  • the control unit controls the two switching tubes on the third drive bridge arm to be turned off.
  • the second motor M2 and the third motor M3 connected to the third drive bridge arm cannot form a current loop.
  • the drive circuit drives the first motor. M1 works normally, and the equivalent structure diagram of its circuit is shown in Figure 2A.
  • the switch tubes on the first drive bridge arm are the first switch tube and the second switch tube in sequence
  • the switch tubes on the second drive bridge arm are the third switch tube and the fourth switch tube in sequence.
  • the control unit can control the first switching tube and the fourth switching tube to conduct, the current flows from the positive pole of the power supply through the first switching tube into the motor M1, and then from the motor M1 through the fourth switching tube into the negative pole of the power supply, forming a complete current loop.
  • the DC motor M1 provides DC power; optionally, the control unit can also control the second switching tube and the third switching tube to conduct, and the current flows from the positive pole of the power supply to the motor M1 through the third switching tube, and then from the motor M1 through the second switching tube It flows into the negative pole of the power supply to form a complete current loop to provide direct current for the direct current motor M1.
  • the control unit can provide current to the stepping motor by controlling the on-time of the switching tube, for example, controlling the motor to control the first switching tube and the fourth switching tube to periodically close and turn off,
  • the direct current is transformed into a time-sharing power supply to provide current for the stepper motor.
  • the switch includes a semiconductor device, an insulated gate bipolar transistor IGBT and/or a triode and its anti-parallel diode and/or a metal-oxide semiconductor field effect transistor MOSFET.
  • the specific form is not limited.
  • the switch is Insulated gate bipolar transistor IGBT and/or triode and its anti-parallel diode, the anti-parallel diode mainly plays the role of freewheeling, avoiding the sudden change of current caused by the transistor or triode cut-off, smoothing the current, and protecting the circuit The role of the original is not damaged.
  • the control unit controls the two switch tubes on the second drive bridge arm to be turned off.
  • the first motor M1 and the third motor M3 connected to the second drive bridge arm cannot form a current loop.
  • the first motor M1 and the third motor M3 are not working, and the control unit ensures that one of the two switch tubes on the first drive bridge arm and the third drive bridge arm has current flowing through it, and the drive circuit drives the second motor at this time.
  • M2 works normally, and the working principle of the second motor M2 is similar to the working principle of the first motor M1 at the first moment, and will not be repeated here.
  • the control unit controls the two switch tubes on the first drive bridge arm to be turned off.
  • the first motor M1 and the second motor M2 connected to the first drive bridge arm cannot form a current loop.
  • the first motor M1 and the second motor M2 do not work, and the control unit ensures that there is current flowing through one of the two switch tubes on the second drive bridge arm and the third drive bridge arm.
  • the drive circuit drives the third motor.
  • M3 works normally, and the working principle of the third motor M3 is similar to the working principle of the first motor M1 at the first moment, and will not be repeated here.
  • control unit controls the switching tubes on all drive bridge arms corresponding to one motor at the same time period, and disconnects all the switching tubes on other drive bridge arms. This can ensure that the multiple motors sharing the bridge arm are in operation. Work at different time periods without affecting each other's work, ensuring the independent work of multiple motors sharing the bridge arm.
  • FIG. 3 is a topology diagram of another multi-motor drive circuit provided by an embodiment of this application. Since the connection between the drive bridge arm and the motor is that each drive bridge arm is connected to multiple motors, and every two motors share one drive bridge arm, a preferred solution is that one drive bridge arm is connected to two motors, and every two motors share one. Drive bridge arm. At this time, the three motors are a group, which happens to share three drive bridge arms. When there are more than three motors in the multi-motor system, the three motors are connected as a group; as shown in Figure 3 , The topology diagram includes two groups of motors, which are the first motor M1 to the sixth motor M6 in sequence.
  • connection mode of the fourth motor M4, the fifth motor M5, and the sixth motor M6 is similar to the connection mode of the first motor M1, the second motor M2, and the third motor M3, that is, the fourth drive bridge arm and the first motor M3 are shared.
  • the two power ports of the fourth motor M4 are connected to the fourth drive bridge arm and the fifth drive bridge.
  • the two power ports of the fifth motor M5 are connected to the fourth drive bridge arm and the sixth drive bridge arm.
  • the two power ports of the sixth motor M6 are connected to the fourth drive bridge arm and the sixth drive bridge arm.
  • a power supply interface is connected to the fifth driving bridge arm and the sixth driving bridge arm.
  • connection mode of the fourth motor M4, the fifth motor M5 and the sixth motor M6 and the drive bridge arm is also similar to the connection mode of the first motor M1, the second motor M2 and the third motor M3, that is, a power supply for the fourth motor M4
  • the interface is connected to the intermediate node of the seventh switch tube and the eighth switch tube in the fourth drive bridge arm, and the other power interface is connected to the intermediate node of the ninth switch tube and the tenth switch tube in the fifth drive bridge arm;
  • the fifth motor M5 One power interface is connected to the intermediate node of the seventh switch tube and the eighth switch tube in the fourth drive bridge arm, and the other power interface is connected to the intermediate node of the eleventh switch tube and the twelfth switch tube in the sixth drive bridge arm;
  • One power interface of the six-motor M6 is connected to the intermediate node of the ninth switch tube and the tenth switch tube in the fifth drive bridge arm, and the other power interface is connected to the eleventh switch tube and the twelfth switch tube in the sixth drive bridge arm
  • the single-motor working principle and working mode of the fourth motor M4, the fifth motor M5, and the sixth motor M6 are similar to the single-motor working mode in the embodiment shown in FIG. The working method of multiple motors is explained.
  • the two motors that share the bridge arm cannot work at the same time, but the control unit can control multiple motors that do not share the bridge arm to work at the same time.
  • the control motors can be the first motor M1 and the fourth motor. Motor M4 works at the same time.
  • the control method is that in the same time period, the control unit controls the two switch tubes on the third drive bridge arm to be turned off.
  • the control unit controls the two switch tubes on the sixth drive bridge arm to be disconnected, at this time, the fifth motor M5 connected to the sixth drive bridge arm and The sixth motor M6 cannot form a current loop, and the fifth motor M5 and the sixth motor M6 do not work.
  • control unit controls one of the two switch tubes on the first drive bridge arm and the second drive bridge arm to have current flowing through it, and controls the two switch tubes on the fourth drive bridge arm and the fifth drive bridge arm.
  • One of the switch tubes has a current passing through it.
  • the drive circuit drives the first motor M1 and the fourth motor M4 to work normally.
  • control unit can also control the first motor M1 and the fifth motor M5 to work at the same time during a certain period of time.
  • the control method is similar to that of the first motor M1 and the fourth motor M4 working at the same time.
  • the multi-motor drive circuit may also include multiple groups of motors, and the control unit can control any number of motors that do not share bridge arms to work at the same time, which is not limited here.
  • the control unit controls the conduction state of the switch tubes of the drive bridge arms in different groups, so that multiple motors that do not share the drive bridge arms can work at the same time, which can avoid the disadvantages that the motors cannot work at the same time in the multi-motor system, and provide a new Multi-motor working mode.
  • Three-phase motors can be divided into three-phase synchronous motors and three-phase asynchronous motors.
  • a three-phase asynchronous motor is a kind of induction motor. It is a kind of motor powered by three-phase AC current with a phase difference of 120 degrees at the same time. ), after the three-phase symmetrical alternating current is applied, a rotating magnetic field will be generated. The rotating magnetic field cuts the rotor winding, thereby generating an induced current in the rotor winding. The current-carrying rotor conductor will generate electromagnetic force under the action of the stator rotating magnetic field. Electromagnetic torque is formed on the motor shaft to drive the motor to rotate.
  • the working principle of the three-phase synchronous motor is: when the three-phase synchronous motor is working, three-phase symmetrical current flows into the three-phase winding of the stator, and the excitation winding of the rotor flows into a direct current.
  • a three-phase alternating current is passed through the three-phase symmetric winding of the stator, a rotating magnetic field will be generated in the air gap, and when a direct current is passed through the rotor field winding, a static magnetic field with a constant polarity will be generated.
  • the rotor magnetic field rotates synchronously with the stator rotating magnetic field due to the magnetic pulling force of the stator magnetic field, that is, the rotor rotates at the same speed and direction as the rotating magnetic field.
  • the three-phase asynchronous motor and the three-phase synchronous motor have three power interfaces.
  • the current input to each power interface of the three-phase motor is AC.
  • the driving circuit functions as the motor inverter, which is responsible for providing DC power.
  • the direct current electric energy is converted into alternating current, and the alternating current is provided to the three-phase motor.
  • FIG. 4 is a topology diagram of another multi-motor drive circuit provided by an embodiment of this application.
  • the drive circuit includes a DC power supply, four three-phase motors, and six drive bridge arms.
  • Each drive bridge arm includes two series switching tubes, and each drive bridge arm is connected in parallel with the DC power supply.
  • Four motors are connected to the drive bridge arms; among them, each drive bridge arm is shared by two motors, and only one drive bridge arm is shared between every two motors.
  • one power interface of the first three-phase motor M1 is connected to the first drive bridge arm, the second power interface is connected to the second drive bridge arm, and the third power interface is connected to the third drive bridge arm;
  • the second three-phase motor M2 One power interface is connected to the first drive bridge arm, the second power interface is connected to the fourth drive bridge arm, and the third power interface is connected to the fifth drive bridge arm;
  • a power interface of the third three-phase motor M3 is connected to the second drive bridge arm , The second power interface is connected to the fourth drive bridge arm, the third power interface is connected to the sixth drive bridge arm;
  • one power interface of the fourth three-phase motor M4 is connected to the third drive bridge arm, and the second power interface is connected to the fifth drive bridge.
  • Drive bridge arm, the third power interface is connected to the sixth drive bridge arm.
  • each driving bridge arm includes two switching tubes
  • the first driving bridge arm includes the first switching tube and the second switching tube
  • the second driving bridge arm to the sixth driving bridge arm include the third switching tube to the tenth switching tube in turn.
  • the middle point of the switching tube and the sixth switching tube is the third output terminal
  • the middle point of the seventh switching tube and the eighth switching tube is the fourth output terminal
  • the middle point of the ninth switching tube and the tenth switching tube is the fifth output.
  • the middle point between the eleventh switch tube and the twelfth switch tube is the sixth output terminal.
  • the three power interfaces of the first three-phase motor are respectively connected to the first output terminal, the second output terminal and the third output terminal; the three power interfaces of the second three-phase motor are respectively connected to the first output terminal and the fourth output terminal And the fifth output terminal; the three power interfaces of the third three-phase motor are respectively connected to the second output terminal, the fourth output terminal and the sixth output terminal; the three power interfaces of the fourth three-phase motor are respectively connected to the third output terminal, The fifth output terminal and the sixth output terminal.
  • the control unit controls all the switch tubes on the fourth, fifth and sixth drive bridge arms to be disconnected.
  • the equivalent structure diagram of the circuit is shown in FIG. 4A.
  • the switch tubes on the first drive bridge arm are the first switch tube and the second switch tube in turn
  • the switch tubes on the second drive bridge arm are the third switch tube and the fourth switch tube in turn
  • the third drive bridge arm is the third switch tube and the fourth switch tube.
  • the switching tubes on the bridge arm are the fifth switching tube and the sixth switching tube in sequence;
  • control unit can control the conduction state of the first switching tube to the sixth switching tube, change the flow of current, and control the switching on and off of multiple switching tubes through a pulse signal, and the direct current provided by the direct current source Converted into alternating current, and input alternating current with a phase difference of 120 degrees to the three interfaces of the first three-phase motor, so that the first three-phase motor M1 runs normally.
  • the switch includes a semiconductor device, an insulated gate bipolar transistor IGBT and/or a triode and its anti-parallel diode and/or a metal-oxide semiconductor field effect transistor MOSFET.
  • the specific form is not limited.
  • the switch is Insulated gate bipolar transistor IGBT and/or triode and its anti-parallel diode, the anti-parallel diode mainly plays the role of freewheeling, avoiding the sudden change of current caused by the transistor or triode cut-off, smoothing the current, and protecting the circuit The role of the original is not damaged.
  • the control unit controls all switch tubes on the second, third, and sixth drive bridge arms to be disconnected.
  • the first three-phase motor M1, the third three-phase motor M3, and the fourth three-phase motor M4, which are connected to the sixth drive bridge arm, cannot get three-phase alternating current and therefore cannot work.
  • the control unit ensures that the first drive bridge arm, One of the two switch tubes on the fourth drive bridge arm and the fifth drive bridge arm has current flowing through it.
  • the drive circuit drives the second three-phase motor M2 to work normally, and the working principle of the second three-phase motor M2 It is similar to the working principle of the first three-phase motor M1 in the first period, and will not be repeated here.
  • the control unit controls all the switch tubes on the first, third and fifth drive bridge arms to be disconnected.
  • the control unit ensures that the second drive bridge arm, One of the two switch tubes on the fourth drive bridge arm and the sixth drive bridge arm has current flowing through it.
  • the drive circuit drives the third three-phase motor M3 to work normally.
  • the working principle of the third three-phase motor M3 It is similar to the working principle of the first three-phase motor M1 in the first period, and will not be repeated here.
  • the control unit controls all the switch tubes on the first drive bridge arm, the second drive bridge arm and the fourth drive bridge arm to be disconnected.
  • the first three-phase motor M1, the second three-phase motor M2, and the third three-phase motor M3, which are connected to the fourth drive bridge arm, cannot get three-phase alternating current and therefore cannot work.
  • the control unit ensures that the third drive bridge arm, One of the two switch tubes on the fifth drive bridge arm and the sixth drive bridge arm has current flowing through it.
  • the drive circuit drives the fourth three-phase motor M4 to work normally, and the working principle of the fourth three-phase motor M4 It is similar to the working principle of the first three-phase motor M1 in the first period, and will not be repeated here.
  • control unit controls the switching tubes on all drive bridge arms corresponding to one motor at the same time period, and disconnects all the switching tubes on other drive bridge arms. This can ensure that the multiple motors sharing the bridge arm are in operation. Work at different time periods without affecting each other's work, ensuring the independent work of multiple motors sharing the bridge arm.
  • FIG. 5 is a topological diagram of another multi-motor drive circuit provided by an embodiment of this application. Since the connection between the drive bridge arm and the motor is that each drive bridge arm is connected to multiple motors, and every two motors share one drive bridge arm, a preferred solution is that one drive bridge arm is connected to two motors, and every two motors share one. Drive bridge arm. At this time, four three-phase motors are a group, and just share six drive bridge arms. When there are more than six three-phase motors in a multi-motor system, that is, four three-phase motors are connected as a group ; As shown in Figure 5, the topology diagram includes two groups of three-phase motors, followed by the first motor M1 to the eighth motor M8.
  • connections of the fifth three-phase motor M5, the sixth three-phase motor M6, the seventh three-phase motor M7, and the eighth three-phase motor M8 are the same as those of the first three-phase motor M1, the second three-phase motor M2, and the second three-phase motor M2.
  • the connection modes of the three-three-phase motor M3 and the fourth three-phase motor M4 are similar, that is, the seventh to the twelfth drive bridge arm is shared.
  • the three interfaces of the fifth three-phase motor M5 are respectively connected to the seventh, eighth and ninth drive bridge arms; the three interfaces of the sixth three-phase motor M6 are respectively connected to the seventh and tenth drive bridge arms.
  • the three interfaces of the seventh three-phase motor M7 are respectively connected to the eighth drive bridge arm, the tenth drive bridge arm and the twelfth drive bridge arm; the eighth three-phase motor M8 has three interfaces The two interfaces are respectively connected to the ninth drive bridge arm, the eleventh drive bridge arm and the twelfth drive bridge arm.
  • the fifth three-phase motor M5, the sixth three-phase motor M6, the seventh three-phase motor M7, and the eighth three-phase motor M8 are connected to the drive bridge arm in the same manner as the first three-phase motor M1, the second three-phase motor M2, and the second three-phase motor M2.
  • the connection mode of the third three-phase motor M3 and the fourth three-phase motor M4 is similar; among them, the middle point of the thirteenth switch tube and the fourteenth switch tube is the seventh output terminal, and the fifteenth switch tube and the sixteenth switch tube
  • the middle point of the tube is the eighth output terminal, the middle point of the seventeenth switch tube and the eighteenth switch tube is the ninth output terminal, and the middle point of the nineteenth switch tube and the twentieth switch tube is the tenth output terminal.
  • the middle point of the twenty-first switching tube and the twenty-second switching tube is the eleventh output terminal, and the middle point of the twenty-third switching tube and the twenty-fourth switching tube is the twelfth output terminal; that is, the fifth and third
  • the three interfaces of the phase motor M5 are respectively connected to the seventh, eighth and ninth output terminals;
  • the three interfaces of the sixth three-phase motor M6 are respectively connected to the seventh, tenth and eleventh output
  • the three interfaces of the seventh three-phase motor M7 are respectively connected to the eighth output end, the tenth output end and the twelfth output end;
  • the three interfaces of the eighth three-phase motor M8 are respectively connected to the ninth output end and the eleventh output end
  • the output terminal and the twelfth output terminal is the eleventh output terminal.
  • the single-motor working principle and working mode of the fifth three-phase motor M5, the sixth three-phase motor M6, the seventh three-phase motor M7, and the eighth three-phase motor M8 are similar to the single-motor working mode in the embodiment shown in FIG. 4. It will not be repeated here, and the working mode of the multiple motors of the driving circuit will be explained below.
  • control motor can be the first three-phase motor M1 and The fifth motor M5 works at the same time.
  • the control method is that in the same period of time, the control unit controls all switch tubes on the fourth to sixth drive bridge arms to be turned off. At this time, it is connected to the fourth to sixth drive bridge arms.
  • the second three-phase motor M2, the third three-phase motor M3, and the fourth three-phase motor M3 in the connection relationship cannot obtain three-phase alternating current.
  • the second three-phase motor M2, the third three-phase motor M3, and the fourth three-phase motor M3 cannot Work; the control unit controls all the switch tubes on the tenth to the twelfth drive bridge arm to be disconnected. At this time, the sixth and third phase connected to the tenth drive bridge arm to the twelfth drive bridge arm The motor M6, the seventh three-phase motor M7, and the eighth three-phase motor M8 cannot obtain three-phase alternating current, and the sixth three-phase motor M6, the seventh three-phase motor M7, and the eighth three-phase motor M8 do not work.
  • the control unit controls the first drive bridge arm, the second drive bridge arm and the third drive bridge arm to have a current flowing through one of the two switch tubes, and controls the seventh drive bridge arm and the eighth drive bridge arm. And one of the two switching tubes on the ninth driving bridge arm has a current passing through it.
  • the driving circuit drives the first three-phase motor M1 and the fifth three-phase motor M5 to work normally.
  • control unit can also control the first three-phase motor M1 and the sixth three-phase motor M6 to work at the same time in a certain period of time.
  • the control method is the same as that of the first three-phase motor M1 and the fifth three-phase motor M5 at the same time
  • the method is similar, only the control unit needs to control each of the first, second, third, seventh, eighth and ninth drive bridge arms at the same time. There is current flowing in one of the switching tubes, and all the switching tubes in the remaining drive bridge arms can be disconnected.
  • the multi-motor drive circuit may also include multiple groups of motors, and the control unit can control any number of motors that do not share bridge arms to work at the same time, which is not limited here.
  • the control unit controls the conduction state of the switch tubes of the drive bridge arms in different groups, so that multiple motors that do not share the drive bridge arms can work at the same time, which can avoid the disadvantages that the motors cannot work at the same time in the multi-motor system, and provide a new Multi-motor working mode.
  • An embodiment of the present application also provides a drive bridge arm circuit, the drive bridge arm circuit includes at least three drive bridge arms, the at least three drive bridge arms are connected in parallel, and the at least three drive bridge arms are connected to a DC power supply In parallel connection, the output end of each of the at least three drive bridge arms can be connected to two power supply interfaces of at least two motors.
  • the at least three drive bridge arms have a connection relationship with at least three motors, and the connection relationship satisfies: at least two drive bridge arms respectively connected to at least two power interfaces of motor i and at least two power supplies of motor j At least two drive bridge arms respectively connected to the interface have at least one different drive bridge arm, and the motor i and the motor j are any two of the at least three motors.
  • the at least three drive bridge arms include a first drive bridge arm, a second drive bridge arm and a third drive bridge arm
  • the at least three motors include a first motor and a second motor.
  • the third motor, each of the first to third motors includes two power interfaces.
  • the first output end of the first drive bridge arm is connected to the first power interface of the first motor and the third power interface of the second motor
  • the second output end of the second drive bridge arm is connected to The second power interface of the first motor and the fifth power interface of the third motor
  • the third output terminal of the third drive bridge arm is connected to the fourth power interface of the second motor and the third power interface.
  • the sixth power interface of the motor is connected to the first power interface of the first motor and the third power interface of the second motor.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes a fifth switch tube and a sixth switch tube connected in series.
  • the first switching tube, the third switching tube and the fifth switching tube are respectively connected to the positive pole of the DC power supply
  • the second switching tube, the fourth switching tube and the sixth switching tube are connected to the positive pole of the DC power supply.
  • the switching tubes are respectively connected to the negative electrode of the DC power supply
  • the intermediate point between the first switching tube and the second switching tube is the first output terminal
  • the third switching tube and the fourth switching tube are connected to each other.
  • the middle point is the second output terminal
  • the middle point between the fifth switch tube and the sixth switch tube is the third output terminal.
  • the drive bridge arm circuit is controlled by a control unit, and the control unit is specifically configured to control the first switching tube, the second switching tube, the third switching tube, and the The conduction state of the fourth switching tube provides current for the first motor; wherein, one of the first switching tube and the second switching tube provides current for the first motor, and the first switching tube One of the three switching tubes and the fourth switching tube provides current for the first motor, and the fifth switching tube and the sixth switching tube are disconnected.
  • the control unit is also used to control the conduction state of the first switching tube, the second switching tube, the fifth switching tube, and the sixth switching tube in the second period to provide current for the second motor; One of the first switching tube and the second switching tube provides current for the second motor, and one of the fifth switching tube and the sixth switching tube provides current for the second motor , The third switch tube and the fourth switch tube are disconnected.
  • the control unit is also used to control the conduction state of the third switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube in the third period to provide current for the third motor;
  • One of the third switching tube and the fourth switching tube provides current for the third motor, and one of the fifth switching tube and the sixth switching tube provides current for the third motor ,
  • the first switching tube and the second switching tube are disconnected.
  • the at least three drive bridge arms include a first drive bridge arm, a second drive bridge arm, a third drive bridge arm, a fourth drive bridge arm, a fifth drive bridge arm, and a first drive bridge arm.
  • the at least three motors include a first three-phase motor, a second three-phase motor, and a third three-phase motor, and the first three-phase motor to the third three-phase motor all include three power interfaces.
  • the first output end of the first drive bridge arm is connected to the first power interface of the first three-phase motor and the fourth power interface of the second three-phase motor; the first output end of the second drive bridge arm The second output terminal is connected to the second power interface of the first three-phase motor and the seventh power interface of the third three-phase motor; the third output terminal of the third drive bridge arm is connected to the first three-phase motor The third power port of the fourth three-phase motor and the tenth power port of the fourth three-phase motor; the fourth output end of the fourth drive bridge arm is connected to the fifth power port of the second three-phase motor and the third three-phase motor The eighth power interface; the fifth output end of the fifth drive bridge arm is connected to the sixth power interface of the second three-phase motor and the eleventh power interface of the fourth three-phase motor; the sixth The sixth output end of the drive bridge arm is connected to the ninth power interface of the third three-phase motor and the twelfth power interface of the fourth three-phase motor.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes a fifth switching tube and a sixth switching tube connected in series
  • the fourth driving bridge arm includes a seventh switching tube and an eighth switching tube connected in series
  • the fifth driving bridge arm includes a series connection
  • the sixth driving bridge arm includes an eleventh switching tube and a twelfth switching tube connected in series.
  • the first switching tube, the third switching tube, the fifth switching tube, the seventh switching tube, the ninth switching tube, and the eleventh switching tube are respectively connected to the DC power supply
  • the second switch tube, the fourth switch tube, the sixth switch tube, the eighth switch tube, the tenth switch tube, and the twelfth switch tube are connected to the The negative pole of the DC power supply is connected, the middle point between the first switch tube and the second switch tube is the first output terminal, and the middle point between the third switch tube and the fourth switch tube is the first output terminal.
  • the middle point between the fifth switch tube and the sixth switch tube is the third output terminal
  • the middle point between the seventh switch tube and the eighth switch tube is the fourth output
  • the middle point of the ninth switching tube and the tenth switching tube is the fifth output terminal
  • the middle point of the eleventh switching tube and the twelfth switching tube is the sixth output end.
  • the drive bridge arm circuit is controlled by a control unit, and the control unit is specifically configured to control the first drive bridge arm, the second drive bridge arm, and the third drive during the first period of time.
  • the conduction state of the switching tube in the bridge arm provides alternating current for the first three-phase motor; wherein, one of the first switching tube and the second switching tube provides the first three-phase motor with Current, one of the third switching tube and the fourth switching tube provides current for the first three-phase motor, and one of the fifth switching tube and the sixth switching tube is the The first three-phase motor provides current, and the seventh, eighth, ninth, tenth, eleventh, and twelfth switch tubes are turned off.
  • the control unit is further configured to control the conduction state of the switch tubes in the first drive bridge arm, the fourth drive bridge arm, and the fifth drive bridge arm in the second time period, and provide alternating current for the second three-phase motor; Wherein, one of the first switching tube and the second switching tube provides current for the second three-phase motor, and one of the seventh switching tube and the eighth switching tube is for the The second three-phase motor provides current, one of the ninth switching tube and the tenth switching tube provides current for the second three-phase motor, the third switching tube, the fourth switching tube, and the The fifth switch tube, the sixth switch tube, the eleventh switch tube, and the twelfth switch tube are disconnected.
  • the control unit is further configured to control the conduction state of the switch tubes in the second drive bridge arm, the fourth drive bridge arm, and the sixth drive bridge arm in the third time period, and provide alternating current for the third three-phase motor; Wherein, one of the third switching tube and the fourth switching tube provides current for the third three-phase motor, and one of the seventh switching tube and the eighth switching tube serves as the The third three-phase motor provides current, one of the eleventh switching tube and the twelfth switching tube provides current for the third three-phase motor, the first switching tube and the second switching tube , The fifth switch tube, the sixth switch tube, the ninth switch tube, and the tenth switch tube are disconnected.
  • the control unit is further configured to control the conduction state of the switch tubes in the third drive bridge arm, the fifth drive bridge arm and the sixth drive bridge arm in the fourth time period, and provide alternating current for the fourth three-phase motor; Wherein, one of the fifth switching tube and the sixth switching tube provides current for the fourth three-phase motor, and one of the ninth switching tube and the tenth switching tube is for the The fourth three-phase motor provides current, one of the eleventh switching tube and the twelfth switching tube provides current for the fourth three-phase motor, the first switching tube and the second switching tube , The third switching tube, the fourth switching tube, the seventh switching tube and the eighth switching tube are disconnected.
  • the embodiment of the present application also provides a control method of a multi-motor drive circuit, including:
  • the control unit determines the target drive bridge arm of the multi-motor drive circuit; wherein, the multi-motor drive circuit includes at least three drive bridge arms, the at least three drive bridge arms are connected in parallel, and the at least three drive bridge arms are connected to the DC
  • the power supplies are connected in parallel, and the output end of each of the at least three driving bridge arms can be connected to the two power supply interfaces of the at least two motors.
  • the at least three drive bridge arms have a connection relationship with at least three motors, and the connection relationship satisfies: at least two drive bridge arms respectively connected to at least two power interfaces of motor i and at least two power supplies of motor j At least two drive bridge arms respectively connected to the interface have at least one different drive bridge arm, and the motor i and the motor j are any two of the at least three motors.
  • the control unit controls the conduction state of the switch tube in the target drive bridge arm, so that the target drive bridge arm provides current for the at least three motors in question.
  • the at least three drive bridge arms include a first drive bridge arm, a second drive bridge arm and a third drive bridge arm, and the at least three motors include a first motor and a second motor.
  • each of the first to third motors includes two power interfaces; the first drive bridge arm includes a first switch tube and a second switch tube connected in series, and the second drive bridge arm includes a series connection The third switching tube and the fourth switching tube of, the third driving bridge arm includes a fifth switching tube and a sixth switching tube connected in series.
  • the first switching tube, the third switching tube and the fifth switching tube are respectively connected to the positive pole of the DC power supply
  • the second switching tube, the fourth switching tube and the sixth switching tube are connected to the positive pole of the DC power supply.
  • the switching tubes are respectively connected to the negative electrode of the DC power supply
  • the intermediate point between the first switching tube and the second switching tube is the first output terminal
  • the third switching tube and the fourth switching tube are connected to each other.
  • the middle point is the second output terminal
  • the middle point between the fifth switch tube and the sixth switch tube is the third output terminal.
  • the first output end of the first drive bridge arm is connected to the first power interface of the first motor and the third power interface of the second motor
  • the second output end of the second drive bridge arm is connected to The second power interface of the first motor and the fifth power interface of the third motor
  • the third output terminal of the third drive bridge arm is connected to the fourth power interface of the second motor and the third power interface.
  • the sixth power interface of the motor is connected to the first power interface of the first motor and the third power interface of the second motor.
  • control unit controlling the conduction state of the switching tube in the target drive bridge arm includes: the control unit controlling the first switching tube to the sixth switch in the first period The conduction state of the tube provides current for the first motor; wherein, one of the first switching tube and the second switching tube provides current for the first motor, and the third switching tube One of the fourth switching tubes and the fourth switching tube provide current for the first motor, and the fifth switching tube and the sixth switching tube are disconnected.
  • the control unit controls the conduction state of the first switching tube to the sixth switching tube in the second period to provide current for the second motor; wherein, the first switching tube and the second switching tube are A switch tube provides current for the second motor, one of the fifth switch tube and the sixth switch tube provides current for the second motor, the third switch tube and the fourth switch The tube is disconnected.
  • the control unit controls the conduction state of the first switching tube to the sixth switching tube in the third period to provide current for the third motor; wherein, the third switching tube and the fourth switching tube are A switch tube provides current for the third motor, one of the fifth switch tube and the sixth switch tube provides current for the third motor, the first switch tube and the second switch The tube is disconnected.
  • the at least three drive bridge arms include a first drive bridge arm, a second drive bridge arm, a third drive bridge arm, a fourth drive bridge arm, a fifth drive bridge arm, and a first drive bridge arm.
  • the at least three motors include a first three-phase motor, a second three-phase motor, and a third three-phase motor, and the first three-phase motor to the third three-phase motor all include three power interfaces.
  • the first driving bridge arm includes a first switching tube and a second switching tube connected in series
  • the second driving bridge arm includes a third switching tube and a fourth switching tube connected in series
  • the third driving bridge arm includes A fifth switching tube and a sixth switching tube connected in series
  • the fourth driving bridge arm includes a seventh switching tube and an eighth switching tube connected in series
  • the fifth driving bridge arm includes a ninth switching tube and a tenth switching tube connected in series
  • the sixth driving bridge arm includes an eleventh switching tube and a twelfth switching tube connected in series.
  • the first switching tube, the third switching tube, the fifth switching tube, the seventh switching tube, the ninth switching tube, and the eleventh switching tube are respectively connected to the DC power supply
  • the second switch tube, the fourth switch tube, the sixth switch tube, the eighth switch tube, the tenth switch tube, and the twelfth switch tube are connected to the The negative pole of the DC power supply is connected, the middle point between the first switch tube and the second switch tube is the first output terminal, and the middle point between the third switch tube and the fourth switch tube is the first output terminal.
  • the middle point between the fifth switch tube and the sixth switch tube is the third output terminal
  • the middle point between the seventh switch tube and the eighth switch tube is the fourth output
  • the middle point of the ninth switching tube and the tenth switching tube is the fifth output terminal
  • the middle point of the eleventh switching tube and the twelfth switching tube is the sixth output end.
  • the first output end of the first drive bridge arm is connected to the first power interface of the first three-phase motor and the fourth power interface of the second three-phase motor; the first output end of the second drive bridge arm The second output terminal is connected to the second power interface of the first three-phase motor and the seventh power interface of the third three-phase motor; the third output terminal of the third drive bridge arm is connected to the first three-phase motor The third power port of the fourth three-phase motor and the tenth power port of the fourth three-phase motor; the fourth output end of the fourth drive bridge arm is connected to the fifth power port of the second three-phase motor and the third three-phase motor The eighth power interface; the fifth output end of the fifth drive bridge arm is connected to the sixth power interface of the second three-phase motor and the eleventh power interface of the fourth three-phase motor; the sixth The sixth output end of the drive bridge arm is connected to the ninth power interface of the third three-phase motor and the twelfth power interface of the fourth three-phase motor.
  • control unit controls the conduction state of the first switching tube to the twelfth switching tube in the first period to provide alternating current for the first three-phase motor; wherein, One of the first switching tube and the second switching tube provides current for the first three-phase motor, and one of the third switching tube and the fourth switching tube is the first and third switching tube.
  • One of the fifth switch tube and the sixth switch tube provides current for the first three-phase motor, and the seventh switch tube, the eighth switch tube, and the ninth switch tube provide current for the first three-phase motor.
  • the tenth switch tube, the eleventh switch tube and the twelfth switch tube are disconnected.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the second period to provide alternating current for the second three-phase motor; wherein, the first switching tube and the second switching tube One of the switching tubes provides current for the second three-phase motor, one of the seventh switching tubes and the eighth switching tube provides current for the second three-phase motor, and the ninth switch One of the tube and the tenth switch tube provides current for the second three-phase motor, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth switch tube, and the eleventh switch tube.
  • the tube is disconnected from the twelfth switch tube.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the third period to provide alternating current for the third three-phase motor; wherein, the third switching tube and the fourth switching tube One of the switching tubes provides current for the third three-phase motor, one of the seventh and eighth switching tubes provides current for the third three-phase motor, and the eleventh switching tube provides current for the third three-phase motor. One of the switching tube and the twelfth switching tube provides current for the third three-phase motor.
  • the first switching tube, the second switching tube, the fifth switching tube, the sixth switching tube, and the ninth switching tube are The switch tube and the tenth switch tube are disconnected.
  • the control unit controls the conduction state of the first switching tube to the twelfth switching tube in the fourth period to provide alternating current for the fourth three-phase motor; wherein, the fifth switching tube and the sixth switching tube One of the switching tubes provides current for the fourth three-phase motor, one of the ninth switching tubes and the tenth switching tube provides current for the fourth three-phase motor, and the eleventh switching tube provides current for the fourth three-phase motor.
  • One of the switching tube and the twelfth switching tube provides current for the fourth three-phase motor, and the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, and the seventh switching tube are The switch tube and the eighth switch tube are disconnected.
  • An embodiment of the present application also provides a control unit, which is configured to execute the method described in any one of the methods for controlling a multi-motor drive circuit provided in the embodiments of the present application.
  • a fifth aspect of the embodiments of the present application provides a vehicle, and the vehicle includes the multi-motor drive circuit according to any one of the multi-motor drive circuits provided in the embodiments of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

本申请实施例包括一种多电机驱动电路,所述多电机驱动电路包括至少三个电机以及至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个电机中每个电机包括至少两个电源接口,所述至少三个驱动桥臂与所述至少三个电机具有连接关系;其中,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。本申请实施例可以应用在智能汽车、网联汽车、新能源汽车上,减少驱动单元的体积和成本。

Description

一种多电机驱动电路及其控制方法 技术领域
本申请实施例涉及电学领域,尤其涉及一种多电机驱动电路及其控制方法。
背景技术
随着设备智能化的提高,多电机系统的应用越来越广泛,例如,电动汽车中就包括座椅调节电机、热管理系统各个电机、门窗电机、三相电机、直流电机、步进电机等各种类型的多个电机;其中,每个电机都需要控制器来控制其工作,电机控制器一般由控制单元和驱动单元来组成,控制单元包括电源模块、主控芯片、通信电路等;驱动单元包括功率驱动电路等。
通常每个电机的控制器都集成在电机本体上,通过通信线缆与其他控制器进行通讯,随着电机数量的增多,控制器和线束数量随之增多,增加了成本和体积,为了减少控制器数量,出现了集成式电机控制器的方案。
一般的方案大都是对控制单元进行集成,即多个电机共用一个控制单元,但是驱动单元的集成方案较少,驱动单元的集成成为一个亟需解决的问题。
发明内容
本申请实施例提供了一种多电机驱动电路及其控制方法,用于集成电机的驱动单元,减少元器件数量以及驱动单元的成本和体积。
本申请实施例的第一方面提供一种多电机驱动电路,包括:
多电机驱动电路中包括至少三个电机以及至少三个驱动桥臂,其中多个驱动桥臂并联,且与直流电源并联,然后再与电机相连;其中,直流电源为电路提供直流电,驱动桥臂则是根据桥臂上开关管的导通状态,来为电机提供电流,而开关管的导通状态则是由控制单元进行控制的;驱动桥臂与电机的连接关系满足,每两个电机的电源接口都可以共用桥臂,但是两个电机连接的驱动桥臂不能完全相同,即一个电机的至少两个电源接口分别连接的至少两个驱动桥臂与另一个电机的至少两个电源接口分别连接的至少两个驱动桥臂,至少要存在一个不相同的驱动桥臂。
一般的,每一个电机都是由独立的驱动桥臂来控制的,在多电机系统中,每两个电机公用一个驱动桥臂可以减少驱动桥臂的数量,这样就会减少元器件的数量以及整个驱动电路的体积和成本。
结合本申请实施例的第一方面,在本申请实施例的第一方面的第一种实现方式中:
多电机系统中的电机可以为步进电机或者直流电机,其中,每个电机都包括两个电源接口;由于每一个驱动桥臂都可以连接多个电机,那么若多电机驱动电路中包括第一电机,第二电机和第三电机时,则可以利用三个驱动桥臂来对其进行驱动,即第一驱动桥臂,第二驱动桥臂和第三驱动桥臂;其中,第一电机的第一电源接口连接第一驱动桥臂,第一电机的第二电源接口连接第二驱动桥臂,第二电机的第三电源接口连接第一驱动桥臂,第二电机的第四电源接口连接第三驱动桥臂,第三电机的第五电源接口连接第二驱动桥臂,第三电机的第六电源接口连接第三驱动桥臂。
三个电机一共包括六个电源接口,每个电源接口都需要一个驱动桥臂对其进行驱动,若使用独立的驱动桥臂对电机进行驱动时,则需要六个驱动桥臂,当每两个电机共用一个驱动桥臂时,该多电机系统的驱动电路就只需要三个驱动桥臂,这样,减少了一半的驱动桥臂,节约了资源。
结合本申请实施例的第一方面的第一种实现方式,本申请实施例的第一方面的第二种实现方式中:
每一个驱动桥臂都是由两个开关管构成的,第一驱动桥臂包括串联的第一开关管和第二开关管,第二驱动桥臂包括串联的第三开关管和第四开关管,第三驱动桥臂包括串联的第五开关管和第六开关管;由于第一驱动桥臂、第二驱动桥臂和第三驱动桥臂都与直流电源并联,那么第一开关管、第三开关管和第五开关管分别与直流电源的正极相连,第二开关管、第四开关管和第六开关管分别与直流电源的负极相连;第一电机的第一电源接口连接第一开关管和第二开关管的中间点,第一电机的第二电源接口连接第三开关管和第四开关管的中间点,第二电机的第三电源接口连接第一开关管和第二开关管的中间点,第二电机的第四电源接口连接第五开关管和第六开关管的中间点,第三电机的第五电源接口连接第三开关管和第四开关管的中间点,第三电机的第六电源接口连接第五开关管和第六开关管的中间点。
采用此种连接方式,通过控制驱动桥臂上各开关管的导通状态,就可以控制流入各电机的电流,使得电机根据电流正常工作。
结合本申请实施例的第一方面的第二种实现方式,本申请实施例的第一方面的第三种实现方式中:
控制单元是通过控制各驱动桥臂上开关管的导通状态来驱动电机进行工作的,虽然多个电机可以共用驱动桥臂,但是在同一时段内,一个驱动桥臂只能驱动一个电机,而不能同时工作于两个电机;具体的,在第一时段内,控制单元控制第一驱动桥臂和第二驱动桥臂为第一电机提供电流,其中,第一开关管和第二开关管中有一个开关管为第一电机提供电流,第三开关管和第四开关管中有一个开关管为第一电机提供电流,第五开关管和第六开关管断开;在第二时段内,控制单元控制第一驱动桥臂和第三驱动桥臂为第二电机提供电流,其中,第一开关管和第二开关管中有一个开关管为第二电机提供电流,第五开关管和第六开关管中有一个开关管为第二电机提供电流,第三开关管和第四开关管断开;在第三时段内,控制单元控制第二驱动桥臂和第三驱动桥臂为第三电机提供电流,其中,第三开关管和第四开关管中有一个开关管为第三电机提供电流,第五开关管和第六开关管中有一个开关管为第三电机提供电流,第一开关管和第二开关管断开。
控制单元在同一时段控制一个电机对应的所有驱动桥臂上的开关管,并且使其他驱动桥臂上的开关管全部断开,这个可以保证共用桥臂的多个电机在不同时段工作,相互不影响其工作,保证了共用桥臂的多个电机的独立工作。
结合本申请实施例的第一方面的第二种实现方式,本申请实施例的第一方面的第四种实现方式中:
三个直流电机两两共用一个驱动桥臂,一共需要三个驱动桥臂,若三个直流电机为一 组,那么多电机驱动电路可以包括多组驱动桥臂,即多电机驱动电路还包括第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,第四驱动桥臂、第五驱动桥臂和第六驱动桥臂也与直流电源并联;其中,第四驱动桥臂包括串联的第七开关管和第八开关管,第五驱动桥臂包括串联的第九开关管和第十开关管,第六驱动桥臂包括串联的第十一开关管和第十二开关管,第七开关管、第九开关管和第十一开关管分别与直流电源的正极相连,第八开关管、第十开关管和第十二开关管分别与直流电源的负极相连。
多电机驱动电路中第四电机的第七电源接口与第七开关管和第八开关管的中间点相连,第四电机的第八电源接口与第九开关管和第十开关管的中间点相连,第五电机的第九电源接口与第七开关管和第八开关管的中间点相连,第五电机的第十电源接口与第十一开关管和第十二开关管的中间点相连,第六电机的第十一电源接口与第九开关管和第十开关管的中间点相连,第六电机的第十二电源接口与第十一开关管和第十二开关管的中间点相连。
驱动电路可以以三个驱动桥臂和三个直流电机为一组,其中三个电机两两共用一个驱动桥臂,使得驱动电路的集成度更高,更有效的减少驱动单元的体积。
结合本申请实施例的第一方面的第四种实现方式,本申请实施例的第一方面的第五种实现方式中:
不共用驱动桥臂的两个电机可以在同一时段内同时工作,因此,控制单元可以控制不同组中的驱动桥臂为不同组的电机提供电流;具体的,控制单元在同一时段,控制第一驱动桥臂和第二驱动桥臂的开关管的导通状态为第一电机提供电流,同时控制第四驱动桥臂和第五驱动桥臂的开关管的导通状态为所述第四电机提供电流;其中,第一开关管和第二开关管中有一个开关管为第一电机提供电流,第三开关管和第四开关管中有一个开关管为第一电机提供电流,第七开关管和第八开关管中有一个开关管为第四电机提供电流,第九开关管和开关管中有一个开关管为第四电机提供电流,其它开关管均断开。
控制单元通过控制不同组中驱动桥臂的开关管的导通状态,可以使得多个不共用驱动桥臂的电机同时工作,这样可以避免多电机系统中电机不能同时工作的弊端,提供了新的多电机工作模式。
结合本申请实施例的第一方面至第一方面的第五种实现方式,本申请实施例的第一方面的第六种实现方式中:
开关管包括半导体器件,半导体器件包括:绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET。
结合本申请实施例的第一方面,本申请实施例的第一方面的第七种实现方式中:
多电机系统中的电机还可以是三相电机,其中,每个电机都包括三个电源接口;一个优选的方案为,每一个驱动桥臂需要连接两个电机,并且每两个三相电机共用一个驱动桥臂,那么若多电机驱动电路中包括第一三相电机、第二三相电机、第三三相电机和第四三相电机时,则需要至少六个驱动桥臂。
其中,第一三相电机的第一电源接口连接第一驱动桥臂,第一三相电机的第二电源接口连接第二驱动桥臂,第一三相电机的第三电源接口连接第三驱动桥臂;第二三相电机的 第四电源接口连接第一驱动桥臂,第二三相电机的第五电源接口连接第四驱动桥臂,第二三相电机的第六电源接口连接第五驱动桥臂;第三三相电机的第七电源接口连接第二驱动桥臂,第三三相电机的第八电源接口连接第四驱动桥臂,第三三相电机的第九电源接口连接第六驱动桥臂;第四三相电机的第十电源接口连接第三驱动桥臂,第四三相电机的第十一电源接口连接第五驱动桥臂,第四三相电机的第十二电源接口连接第六驱动桥臂。
四个三相电机一共包括十二个接口,每个接口都需要一个驱动桥臂对其进行驱动,若使用独立的驱动桥臂对电机进行驱动时,则需要十二个驱动桥臂,当每两个电机共用一个驱动桥臂时,则该多电机系统的驱动电路只需要六个驱动桥臂,这样,减少了一半的驱动桥臂,节约了资源。
结合本申请实施例的第一方面的第七种实施方式,本申请实施例的第一方面的第八种实现方式中:
每一个驱动桥臂都包括串联的两个二极管,每个驱动桥臂都与直流电源并联,因此,从第一驱动桥臂至第六驱动桥臂中,就包括了第一开关管至第十二开关管;其中,第一开关管、第三开关管、第五开关管、第七开关管、第九开关管和第十一开关管分别与直流电源的正极相连;第二开关管、第四开关管、第六开关管、第八开关管、第十开关管和第十二开关管分别与直流电源的负极相连;第一开关管和第二开关管的中间点为驱动电路的第一输出端,第三开关管和第四开关管的中间点为第二输出端,第五开关管和第六开关管的中间点为第三输出端,第七开关管和第八开关管的中间点为第四输出端,第九开关管和第十开关管的中间点为第五输出端,第十一开关管和第十二开关管的中间点为第六输出端。
其中,第一三相电机的第一电源接口和第一输出端相连,第一三相电机的第二电源接口和第二输出端相连,第一三相电机的第三电源接口和第三输出端相连;第二三相电机的第四电源接口连接第一输出端,第二三相电机的第五电源接口连接第四输出端,第二三相电机的第六电源接口连接第五输出端;第三三相电机的第七电源接口连接第二输出端,第三三相电机的第八电源接口连接第四输出端,第三三相电机的第九电源接口连接第六输出端;第四三相电机的第十电源接口连接第三输出端,第四三相电机的第十一电源接口连接第五输出端,第四三相电机的第十二电源接口连接第六输出端。
采用此种连接方式,通过控制桥臂上各开关管的导通状态,就可以控制流入各电机的电流,使得驱动电路将直流电转换为交流电提供给三相电机,保证三相电机的正常工作。
结合本申请实施例的第一方面的第八种实施方式,本申请实施例的第一方面的第九种实现方式中:
控制单元是通过控制各驱动桥臂上开关管的导通状态来驱动电机进行工作的,虽然多个电机可以共用驱动桥臂,但是在同一时段内,一个驱动桥臂只能驱动一个电机,而不能同时工作于多个电机,具体的,控制单元在第一时段控制第一驱动桥臂、第二驱动桥臂和第三驱动桥臂中开关管的导通状态,为第一三相电机提供交流电;即第一开关管和第二开关管中有一个开关管为第一三相电机提供电流,第三开关管和第四开关管中有一个开关管为第一三相电机提供电流,第五开关管和第六开关管中有一个开关管为第一三相电机提供电流,其余开关管均断开。
控制单元在第二时段控制第一驱动桥臂、第四驱动桥臂和第五驱动桥臂中开关管的导通状态,为第二三相电机提供交流电;即第一开关管和第二开关管中有一个开关管为第二三相电机提供电流,第七开关管和第八开关管中有一个开关管为第二三相电机提供电流,第九开关管和第十开关管中有一个开关管为第二三相电机提供电流,其余开关管均断开。
控制单元在第三时段控制第二驱动桥臂、第四驱动桥臂和第六驱动桥臂中开关管的导通状态,为第三三相电机提供交流电;即第三开关管和第四开关管中有一个开关管为第三三相电机提供电流,第七开关管和第八开关管中有一个开关管为第三三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第三三相电机提供电流,其余开关管均断开。
控制单元在第四时段控制第三驱动桥臂、第五驱动桥臂和第六驱动桥臂中开关管的导通状态,为第四三相电机提供交流电;即第五开关管和第六开关管中有一个开关管为第四三相电机提供电流,第九开关管和第十开关管中有一个开关管为第四三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第四三相电机提供电流,其余开关管均断开。
控制单元在同一时段控制一个三相电机对应的所有驱动桥臂上的开关管,并且使其他驱动桥臂上的开关管全部断开,这个可以保证共用桥臂的多个电机在不同时段工作,相互不影响其工作,保证了共用桥臂的多个电机的独立工作。
结合本申请实施例的第一方面的第九种实施方式,本申请实施例的第一方面的第十种实现方式中:
四个三相电机两两共用一个驱动桥臂,一共需要六个驱动桥臂,若四个直流电机为一组,那么多电机驱动电路可以包括多组驱动桥臂,即多电机驱动电路还包括第七驱动桥臂、第八驱动桥臂、第九驱动桥臂、第十驱动桥臂、第十一驱动桥臂和第十二驱动桥臂,这些驱动桥臂也直流电源并联。
其中,每一个驱动桥臂都包括两个串联的开关管,即第七驱动桥臂至第十二驱动桥臂包括第十三开关管至第二十四开关管;第十三开关管、第十五开关管、第十七开关管、第十九开关管、第二十一开关管和第二十三开关管分别与直流电源的正极相连,第十四开关管、第十六开关管、第十八开关管、第二十开关管、第二十二开关管和第二十四开关管分别与直流电源的负极相连。
其中,第十三开关管和第十四开关管的中间点为第七输出端,第十五开关管和第十六开关管的中间点为第八输出端,第十七开关管和第十八开关管的中间点为第九输出端,第十九开关管和第二十开关管的中间点为第十输出端,第二十一开关管和第二十二开关管的中间点为第十一输出端,第二十三开关管和第二十四开关管的中间点为第十二输出端。
多电机驱动电路中第五三相电机的第十三电源接口连接第七输出端,第五三相电机的第十四电源接口连接第八输出端,第五三相电机的第十五电源接口连接第九输出端;第六三相电机的第十六电源接口连接第七输出端,第六三相电机的第十七电源接口连接第十输出端,第六三相电机的第十八电源接口连接第十一输出端;第七三相电机的第十九电源接口连接第八输出端,第七三相电机的第二十电源接口连接第十输出端,第七三相电机的第 二十一电源接口连接第十二输出端;第八三相电机的第二十二电源接口连接第九输出端,第八三相电机的第二十三电源接口连接第十一输出端,第八三相电机的第二十四电源接口连接第十二输出端。
驱动电路可以以六个驱动桥臂和四个三相电机为一组,其中四个电机两两共用一个驱动桥臂,使得驱动电路的集成度更高,更有效的减少驱动单元的体积。
结合本申请实施例的第一方面的第十种实施方式,本申请实施例的第一方面的第十一种实现方式中:
不共用驱动桥臂的两个三相电机可以在同一时段内同时工作,因此,控制单元可以控制不同组中的驱动桥臂为不同组的电机提供电流;具体的,控制单元在同一时段控制第一逆变器桥臂、第二逆变器桥臂和第三逆变器桥臂的开关管的导通状态为第一三相电机提供电流,控制第七逆变器桥臂、第八逆变器桥臂和第九逆变器桥臂的开关管的导通状态为所述第五三相电机提供电流;即第一开关管和第二开关管中有一个开关管为第一三相电机提供电流,第三开关管和第四开关管中有一个开关管为第一三相电机提供电流,第五开关管和第六开关管中有一个开关管为第一三相电机提供电流,第十三开关管和第十四开关管中有一个开关管为第五三相电机提供电流,第十五开关管和第十六开关管中有一个开关管为第五三相电机提供电流,第十七开关管和第十八开关管中有一个开关管为第五三相电机提供电流,第七开关管至第十二开关管和第十九开关管至第二十四开关管均断开。
控制单元通过控制不同组中驱动桥臂的开关管的导通状态,可以使得多个不共用驱动桥臂的电机同时工作,这样可以避免多电机系统中电机不能同时工作的弊端,提供了新的多电机工作模式。
结合本申请实施例的第一方面的第七种实施方式至第一方面的第十一种实施方式,本申请实施例的第一方面的第十而种实现方式中:
开关装置包括半导体器件,该半导体器件包括:绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET。
本申请实施例第二方面提供了一种驱动桥臂电路,包括:
驱动桥臂电路包括至少三个驱动桥臂,每一个驱动桥臂都可以连接多个电机的接口,即可以连接多个电机,每一个驱动桥臂都与直流电源并联,驱动桥臂和电机的连接关系需要满足:每两个电机的电源接口都可以共用桥臂,但是两个电机连接的驱动桥臂不能完全相同,即一个电机的至少两个电源接口分别连接的至少两个驱动桥臂与另一个电机的至少两个电源接口分别连接的至少两个驱动桥臂,至少要存在一个不相同的驱动桥臂。
一般的,电机的每一个电源接口都需要单独的一个驱动桥臂,且每个驱动桥臂都只连接一个电机的一个电源接口,当驱动桥臂电路可以连接多个电机时,电机就可以共用驱动桥臂,这样可以减少驱动电路中驱动桥臂的数量,减少元器件的数量,节约了资源。
结合本申请实施例的第二方面,在本申请实施例的第一方面的第一种实现方式中:
驱动桥臂可以包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂,电机则包括第一电机,第二电机和第三电机,这三个电机均包括两个电源接口;一个优选的方案,第一驱动桥臂的第一输出端连接第一电机的第一电源接口和第二电机的第三电源接口,第二驱动桥 臂的第二输出端连接第一电机的第二电源接口和第三电机的第五电源接口,第三驱动桥臂的第三输出端连接第二电机的第四电源接口和第三电机的第六电源接口。
三个电机一共包括六个接口,每个接口都需要一个驱动桥臂对其进行驱动,若使用独立的驱动桥臂对电机进行驱动时,则需要六个驱动桥臂,当每两个电机共用一个驱动桥臂时,则该多电机系统的驱动电路只需要三个驱动桥臂,这样,减少了一半的驱动桥臂,节约了资源。
结合本申请实施例的第二方面的第一种实现方式,在本申请实施例的第二方面的第二种实现方式中:
第一驱动桥臂包括串联的第一开关管和第二开关管,第二驱动桥臂包括串联的第三开关管和第四开关管,第三驱动桥臂包括串联的第五开关管和第六开关管;其中,所述第一开关管、所述第三开关管和所述第五开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管和所述第六开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端。
结合本申请实施例的第二方面的第二种实现方式,在本申请实施例的第二方面的第三种实现方式中:
驱动桥臂电路由控制单元控制,控制单元具体用于在第一时段控制第一开关管、第二开关管、第三开关管和第四开关管的导通状态,为第一电机提供电流;其中,第一开关管和第二开关管中有一个开关管为第一电机提供电流,第三开关管和第四开关管中有一个开关管为第一电机提供电流,第五开关管和第六开关管断开。
控制单元还用于在第二时段控制第一开关管、第二开关管、第五开关管和第六开关管的导通状态,为第二电机提供电流;其中,第一开关管和第二开关管中有一个开关管为第二电机提供电流,第五开关管和第六开关管中有一个开关管为所述第二电机提供电流,第三开关管和第四开关管断开。
控制单元还用于在第三时段控制第三开关管、第四开关管、第五开关管和第六开关管的导通状态,为第三电机提供电流;其中,第三开关管和第四开关管中有一个开关管为第三电机提供电流,第五开关管和第六开关管中有一个开关管为第三电机提供电流,第一开关管和第二开关管断开。
控制单元在同一时段控制一个电机对应的所有驱动桥臂上的开关管,并且使其他驱动桥臂上的开关管全部断开,这个可以保证共用桥臂的多个电机在不同时段工作,相互不影响其工作,保证了共用桥臂的多个电机的独立工作。
结合本申请实施例的第二方面,在本申请实施例的第二方面的第四种实现方式中:
当电机为三相电机,即每个电机都有三个电源接口时,一个优选的方案为三个三相电机共用六个驱动桥臂,驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,三个电机分别第一三相电机,第二三相电机和第三三相电机。
其中,第一驱动桥臂的第一输出端连接第一三相电机的第一电源接口和第二三相电机 的第四电源接口;第二驱动桥臂的第二输出端连接第一三相电机的第二电源接口和第三三相电机的第七电源接口;第三驱动桥臂的第三输出端连接第一三相电机的第三电源接口和三相电机的第十电源接口;第四驱动桥臂的第四输出端连接第二三相电机的第五电源接口和第三三相电机的第八电源接口;第五驱动桥臂的第五输出端连接第二三相电机的第六电源接口和第四三相电机的第十一电源接口;第六驱动桥臂的第六输出端连接所述第三三相电机的第九电源接口和第四三相电机的第十二电源接口。
四个三相电机一共包括十二个接口,每个接口都需要一个驱动桥臂对其进行驱动,若使用独立的驱动桥臂对电机进行驱动时,则需要十二个驱动桥臂,当每两个电机共用一个驱动桥臂时,则该多电机系统的驱动电路只需要六个驱动桥臂,这样,减少了一半的驱动桥臂,节约了资源。
结合本申请实施例的第二方面的第四种实现方法,在本申请实施例的第二方面的第五种实现方式中:
第一驱动桥臂包括串联的第一开关管和第二开关管,第二驱动桥臂包括串联的第三开关管和第四开关管,第三驱动桥臂包括串联的第五开关管和第六开关管,第四驱动桥臂包括串联的第七开关管和第八开关管,第五驱动桥臂包括串联的第九开关管和第十开关管,第六驱动桥臂包括串联的第十一开关管和第十二开关管。
其中,第一开关管、第三开关管、第五开关管、第七开关管、第九开关管和第十一开关管分别与直流电源的正极相连,第二开关管、第四开关管、第六开关管、第八开关管、第十开关管和第十二开关管分别与直流电源的负极相连,第一开关管和第二开关管的中间点为第一输出端,第三开关管和第四开关管的中间点为第二输出端,第五开关管和第六开关管的中间点为第三输出端,第七开关管和第八开关管的中间点为第四输出端,第九开关管和第十开关管的中间点为第五输出端,第十一开关管和第十二开关管的中间点为第六输出端。
结合本申请实施例的第二方面的第五种实现方法,在本申请实施例的第一方面的第六种实现方式中:
驱动桥臂电路由控制单元控制,控制单元在第一时段控制第一驱动桥臂、驱动桥臂和驱动桥臂中开关管的导通状态,为第一三相电机提供交流电;其中,第一开关管和第二开关管中有一个开关管为第一三相电机提供电流,第三开关管和第四开关管中有一个开关管为第一三相电机提供电流,第五开关管和第六开关管中有一个开关管为第一三相电机提供电流,第七开关管、第八开关管、第九开关管、第十开关管、第十一开关管和第十二开关管断开。
控制单元在第二时段控制第一驱动桥臂、第四驱动桥臂和第五驱动桥臂中开关管的导通状态,为第二三相电机提供交流电;其中,第一开关管和第二开关管中有一个开关管为第二三相电机提供电流,第七开关管和第八开关管中有一个开关管为第二三相电机提供电流,第九开关管和第十开关管中有一个开关管为第二三相电机提供电流,第三开关管、第四开关管、第五开关管、第六开关管、第十一开关管和第十二开关管断开。
控制单元在第三时段控制第二驱动桥臂、第四驱动桥臂和第六驱动桥臂中开关管的导 通状态,为第三三相电机提供交流电;其中,第三开关管和第四开关管中有一个开关管为第三三相电机提供电流,第七开关管和第八开关管中有一个开关管为第三三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第三三相电机提供电流,第一开关管、第二开关管、第五开关管、第六开关管、第九开关管和第十开关管断开。
控制单元在第四时段控制第三驱动桥臂、第五驱动桥臂和第六驱动桥臂中开关管的导通状态,为第四三相电机提供交流电;其中,第五开关管和第六开关管中有一个开关管为第四三相电机提供电流,第九开关管和第十开关管中有一个开关管为第四三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第四三相电机提供电流,第一开关管、第二开关管、第三开关管、第四开关管、第七开关管和第八开关管断开。
本申请实施例第三方面提供了一种多电机驱动电路的控制方法,包括:
控制单元确定多电机驱动电路的目标驱动桥臂;
其中,该多电机驱动电路包括至少三个电机以及至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个电机中每个电机包括至少两个电源接口,所述至少三个驱动桥臂与所述至少三个电机具有连接关系。
其中,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。
然后控制单元控制目标驱动桥臂中开关管的导通状态,以使得所述目标驱动桥臂为所诉至少三个电机提供电流。
结合本申请实施例的第三方面,在本申请实施例的第三方面的第一种实现方式中:
至少三个驱动桥臂包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂,至少三个电机包括第一电机,第二电机和第三电机,第一电机至第三电机均包括两个电源接口;第一驱动桥臂包括串联的第一开关管和第二开关管,第二驱动桥臂包括串联的第三开关管和第四开关管,第三驱动桥臂包括串联的第五开关管和第六开关管。
其中,第一开关管、第三开关管和第五开关管分别与直流电源的正极相连,第二开关管、第四开关管和第六开关管分别与直流电源的负极相连,第一开关管和第二开关管的中间点为所述第一输出端,第三开关管和第四开关管的中间点为所述第二输出端,第五开关管和第六开关管的中间点为所述第三输出端。
其中,第一输出端连接第一电机的第一电源接口和第二电机的第三电源接口,第二输出端连接第一电机的第二电源接口和第三电机的第五电源接口,第三输出端连接第二电机的第四电源接口和所述第三电机的第六电源接口。
结合本申请实施例的第三方面的第一种实施方式,在本申请实施例的第三方面的第二种实现方式中:
控制单元在第一时段控制第一开关管至第六开关管的导通状态,为第一电机提供电流;其中,第一开关管和第二开关管中有一个开关管为第一电机提供电流,第三开关管和第四开关管中有一个开关管为第一电机提供电流,第五开关管和第六开关管断开。
控制单元在第二时段控制第一开关管至第六开关管的导通状态,为第二电机提供电流; 其中,第一开关管和第二开关管中有一个开关管为第二电机提供电流,第五开关管和第六开关管中有一个开关管为第二电机提供电流,第三开关管和第四开关管断开。
控制单元在第三时段控制第一开关管至第六开关管的导通状态,为第三电机提供电流;其中,第三开关管和第四开关管中有一个开关管为第三电机提供电流,第五开关管和第六开关管中有一个开关管为第三电机提供电流,第一开关管和第二开关管断开。
结合本申请实施例的第三方面,在本申请实施例的第三方面的第三种实现方式中:
至少三个驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,至少三个电机包括第一三相电机,第二三相电机和第三三相电机,第一三相电机至第三三相电机均包括三个电源接口。
其中,第一驱动桥臂包括串联的第一开关管和第二开关管,第二驱动桥臂包括串联的第三开关管和第四开关管,第三驱动桥臂包括串联的第五开关管和第六开关管,第四驱动桥臂包括串联的第七开关管和第八开关管,第五驱动桥臂包括串联的第九开关管和第十开关管,第六驱动桥臂包括串联的第十一开关管和第十二开关管。
其中,第一开关管、第三开关管、第五开关管、第七开关管、第九开关管和第十一开关管分别与直流电源的正极相连,第二开关管、第四开关管、第六开关管、第八开关管、第十开关管和第十二开关管分别与直流电源的负极相连,第一开关管和第二开关管的中间点为第一输出端,第三开关管和第四开关管的中间点为第二输出端,第五开关管和第六开关管的中间点为第三输出端,第七开关管和第八开关管的中间点为第四输出端,第九开关管和第十开关管的中间点为第五输出端,第十一开关管和第十二开关管的中间点为所述第六输出端。
其中,第一输出端连接第一三相电机的第一电源接口和第二三相电机的第四电源接口;第二输出端连接第一三相电机的第二电源接口和第三三相电机的第七电源接口;第三输出端连接第一三相电机的第三电源接口和三相电机的第十电源接口;第四输出端连接第二三相电机的第五电源接口和第三三相电机的第八电源接口;第五输出端连接第二三相电机的第六电源接口和第四三相电机的第十一电源接口;第六输出端连接第三三相电机的第九电源接口和第四三相电机的第十二电源接口。
结合本申请实施例的第三方面的第三种实施方式,在本申请实施例的第三方面的第四种实现方式中:
控制单元在第一时段控制第一开关管至第十二开关管的导通状态,为第一三相电机提供交流电;其中,第一开关管和第二开关管中有一个开关管为第一三相电机提供电流,第三开关管和第四开关管中有一个开关管为第一三相电机提供电流,第五开关管和第六开关管中有一个开关管为第一三相电机提供电流,第七开关管、第八开关管、第九开关管、第十开关管、第十一开关管和第十二开关管断开。
控制单元在第二时段控制第一开关管至第十二开关管的导通状态,为第二三相电机提供交流电;其中,第一开关管和第二开关管中有一个开关管为第二三相电机提供电流,第七开关管和第八开关管中有一个开关管为第二三相电机提供电流,第九开关管和第十开关管中有一个开关管为第二三相电机提供电流,第三开关管、第四开关管、第五开关管、第 六开关管、第十一开关管和第十二开关管断开。
控制单元在第三时段控制第一开关管至第十二开关管的导通状态,为第三三相电机提供交流电;其中,第三开关管和所述第四开关管中有一个开关管为第三三相电机提供电流,第七开关管和第八开关管中有一个开关管为第三三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第三三相电机提供电流,第一开关管、第二开关管、第五开关管、第六开关管、第九开关管和第十开关管断开。
控制单元在第四时段控制第一开关管至第十二开关管的导通状态,为第四三相电机提供交流电;其中,第五开关管和第六开关管中有一个开关管为第四三相电机提供电流,第九开关管和第十开关管中有一个开关管为第四三相电机提供电流,第十一开关管和第十二开关管中有一个开关管为第四三相电机提供电流,第一开关管、第二开关管、第三开关管、第四开关管、第七开关管和第八开关管断开。
本申请实施例第四方面提供了一种控制单元,所述控制单元用于执行如本申请实施例第三方面至第三方面第四种实施方式提供的任一项所述的方法。
本申请实施例第五方面提供了一种车辆,所述车辆包括如本申请实施例第一方面至第一方面第十二种实施方式任一项所述的多电机驱动电路。
本申请实施例提供的技术方案中,多个电机通过共用驱动桥臂的方式,每一个驱动桥臂可以连接多个电机,每两个电机的电源接口接入的驱动桥臂不能完全相同,这样对驱动单元进行集成,减少元器件数量以及驱动单元的成本和体积。
附图说明
图1为本申请实施例中提供的多电机系统的场景示意图;
图2为本申请实施例中提供的多电机驱动电路的拓扑图;
图2A为本申请实施例提供的一种多电机驱动电路的等效图;
图3为本申请实施例中提供的另一个多电机驱动电路的拓扑图;
图4为本申请实施例提供的另一种多电机驱动电路的拓扑图;
图4A为本申请实施例提供的另一种多电机驱动电路的等效图;
图5为本申请实施例提供的另一种多电机驱动电路的拓扑图。
具体实施方式
本申请实施例提供了一种多电机驱动电路及其工作方法,用于集成电机的驱动单元,减少元器件数量以及驱动单元的成本和体积。
请参阅图1,为本申请实施例提供的多电机系统的场景示意图。如图1所示,随着汽车智能化的提高,电动汽车中用到的执行电机数量和种类越来越多,比如座椅调节电机、热管理系统电机、门窗电机等,电机的类型也包括直流电机、步进电机、三相电机等。通常这些电机的控制器都集成在电机本体上,通过通信线缆与其他控制器进行通信,这样,就导致每个电机都需要一个控制器。
一般的,电机控制器分为控制单元和驱动单元,控制单元包括电源模块、主控芯片、通信电路等,驱动单元包括功率驱动电路等。其中,控制单元用于产生控制信号,驱动单元包括驱动电路;驱动电路的基本任务,就是将信息电子电路传来的信号按照其控制目标 的要求,转换为加在电力电子器件控制端与公共端之间,可以使其开通或者关断的信号。一般的,对半控型器件只需提供开通控制信号,对全控型器件既要提供开通控制信号,又要提供关断控制信号,以保证器件可以按照可靠导通或者关断。
随着电机数量的增多,控制器和线束数量也随之增加,增加了整个控制系统的成本和体积,为了减少控制器的数量,一般的,都会选择集成控制单元,即多个电机共用一个控制器,但是驱动单元的集成化方案较少,集成驱动电路是一个亟需解决的问题。
本申请实施例提供了一种多电机驱动电路,该多电机驱动电路包括至少三个电机以及至少三个驱动桥臂,其中,所有驱动桥臂都以并联的方式连接,并且与直流电源并联,一般的,电机包括至少两个电源接口,因此为了集成驱动电路,不同的电机之间共用驱动桥臂,所以电机与驱动桥臂的连接关系应该时,每两个电机之间,共用驱动桥臂,但是一个电机的电源接口分别连接的驱动桥臂与另一个电机的电源接口分别连接的驱动桥臂不能完全相同,即电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂;这样可以在保证每个电机独立工作的情况下实现驱动电路的集成。
下面分别对不同电机对应的驱动电路的集成方案进行介绍。
一、直流电机或者单相步进电机:
直流电机是将直流电转换为机械能的电动机,当直流电源通过电刷向电枢绕组供电时,电枢表面N极下导体可以流过相同方向的电流,此时导体将收到逆时针方向的力矩作用;电枢表面S极下部分导体也流过相同方向的电流,同样也将收到逆时针方向的力矩作用,这样,整个电枢绕组将按照顺时针旋转,输入的直流电能就能转换为转子轴上的机械能。
单相步进电机与直流电机的原理类似,只是利用电子电路,将直流电变成分时供电的,多相时序控制电流,当步进电机接收到一个脉冲信号,它就驱动步进电机按照设定的方向转动一个固定的角度,其旋转是以固定的角度一步一步运行的。
直流电机和步进电机的共同点为,输入电机的电流为非交流电,实现正转和反转。并且直流电机和步进电机都拥有两个接口来与驱动电路相连,形成回路,因此,请参阅图2,为本申请实施例提供的多电机驱动电路的拓扑图。
如图2所示,驱动电路包括直流电源、三个直流电机或步进电机,以及三个驱动桥臂,每一个驱动桥臂都包括两个串联开关管,且每个驱动桥臂分别与直流电源并联,三个电机与驱动桥臂相连;其中,每一个驱动桥臂被两个电机共用,每两个电机之间共用一个驱动桥臂。
直流电源用于为驱动桥臂提供直流电,而驱动桥臂则是通过改变每一个开关管的导通状态,对直流电源提供的直流电进行变换,然后为各个电机提供电流,保证每个电机的正常工作。
其中,第一电机M1的两个电源接口连接第一驱动桥臂和第二驱动桥臂,第二电机M2的两个电源接口连接第一驱动桥臂和第三驱动桥臂,第三电机M3的两个电源接口连接第二驱动桥臂和第三驱动桥臂;具体的连接方式为,第一电机M1的一个电源接口连接在第一驱动桥臂两个开关管的中间点,第一电机M1的另一个电源接口连接在第二驱动桥臂两个开关 管的中间点;第二电机M2的一个电源接口连接在第一驱动桥臂两个开关管的中间点,第二电机M2的另一个电源接口连接在第三驱动桥臂两个开关管的中间点;第三电机M3的一个电源接口连接在第二驱动桥臂两个开关管的中间点,第三电机M3的另一个电源接口连接在第三驱动桥臂两个开关管的中间点。
下面对该驱动电路的工作原理以及工作方式进行阐述:
(一)单电机工作模式:
在第一时段内,控制单元控制第三驱动桥臂上的两个开关管均断开,此时,与第三驱动桥臂相连的第二电机M2和第三电机M3无法形成电流回路,此时第二电机M2和第三电机M3不工作,同时保证第一驱动桥臂和第二驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第一电机M1正常工作,其电路的等效结构图如图2A所示。
在图2A中,第一驱动桥臂上的开关管依次为第一开关管和第二开关管,第二驱动桥臂上的开关管依次为第三开关管和第四开关管,可选的,控制单元可以控制第一开关管和第四开关管导通,其电流从电源正极经第一开关管流入电机M1,再从电机M1经过第四开关管流入电源负极,形成完整电流回路,为直流电机M1提供直流电;可选的,控制单元还可以控制第二开关管和第三开关管导通,其电流从电源正极经第三开关管流入电机M1,再从电机M1经过第二开关管流入电源负极,形成完整电流回路,为直流电机M1提供直流电。
当电机M1为步进电机时,控制单元可以通过控制开关管的导通时间来为步进电机提供电流,例如,控制电机控制第一开关管和第四开关管周期性的闭合与关断,将直流电变换为分时供电,为步进电机提供电流。
其中,开关包括管包括半导体器件,绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET,具体形式不做限定,当开关管为绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管时,反并联二极管的主要起续流的作用,避免晶体管或者三极管截止而引起的电流突变,起到平滑电流,保护电路中的原件不被损坏的作用。
在第二时段内,控制单元控制第二驱动桥臂上的两个开关管均断开,此时,与第二驱动桥臂相连的第一电机M1和第三电机M3无法形成电流回路,第一电机M1和第三电机M3不工作,同时控制单元保证第一驱动桥臂和第三驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第二电机M2正常工作,第二电机M2的工作原理与第一时刻中第一电机M1的工作原理类似,在此不做赘述。
在第三时段内,控制单元控制第一驱动桥臂上的两个开关管均断开,此时,与第一驱动桥臂相连的第一电机M1和第二电机M2无法形成电流回路,第一电机M1和第二电机M2不工作,同时控制单元保证第二驱动桥臂和第三驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第三电机M3正常工作,第三电机M3的工作原理与第一时刻中第一电机M1的工作原理类似,在此不做赘述。
在本实施例中,控制单元在同一时段控制一个电机对应的所有驱动桥臂上的开关管,并且使其他驱动桥臂上的开关管全部断开,这个可以保证共用桥臂的多个电机在不同时段 工作,相互不影响其工作,保证了共用桥臂的多个电机的独立工作。
请参阅图3,为本申请实施例提供的另一个多电机驱动电路的拓扑图。由于驱动桥臂与电机的联系方式为每一个驱动桥臂连接多个电机,每两个电机共用一个驱动桥臂,一个优选的方案即一个驱动桥臂连接两个电机,每两个电机共用一个驱动桥臂,此时,三个电机为一组,正好共用三个驱动桥臂,当多电机系统中存在三个以上的电机时,即三个电机为一组进行连接;如图3所示,该拓扑图中包括了两组电机,依次为第一电机M1至第六电机M6。
可以理解的,第四电机M4、第五电机M5和第六电机M6的连接方式与第一电机M1、第二电机M2和第三电机M3的连接方式类似,即共用第四驱动桥臂、第五驱动桥臂和第六驱动桥臂。第四电机M4的两个电源接口连接第四驱动桥臂和第五驱动桥臂,第五电机M5的两个电源接口连接第四驱动桥臂和第六驱动桥臂,第六电机M6的两个电源接口连接第五驱动桥臂和第六驱动桥臂。
第四电机M4、第五电机M5和第六电机M6与驱动桥臂的连接方式也与第一电机M1、第二电机M2和第三电机M3的连接方式类似,即第四电机M4的一个电源接口连接第四驱动桥臂中第七开关管和第八开关管的中间节点,另一个电源接口连接第五驱动桥臂中第九开关管和第十开关管的中间节点;第五电机M5的一个电源接口连接第四驱动桥臂中第七开关管和第八开关管的中间节点,另一个电源接口连接第六驱动桥臂中第十一开关管和第十二开关管的中间节点;第六电机M6的一个电源接口连接第五驱动桥臂中第九开关管和第十开关管的中间节点,另一个电源接口连接第六驱动桥臂中第十一开关管和第十二开关管的中间节点。
第四电机M4、第五电机M5和第六电机M6的单电机工作原理和工作模式与图2所示实施例中的单电机工作模式类似,在此不做赘述,下面对该驱动电路的多个电机进行工作的工作方式进行阐述。
(二)多电机工作模式:
共用桥臂的两个电机不能同时进行工作,但是,控制单元可以控制不共用桥臂的多个电机同时进行工作,示例性的,如图3所示,控制电机可以第一电机M1和第四电机M4同时工作。其控制的方法为,在同一时段内,控制单元控制第三驱动桥臂上的两个开关管均断开,此时,与第三驱动桥臂相连的第二电机M2和第三电机M3无法形成电流回路,第二电机M2和第三电机M3不工作;控制单元控制第六驱动桥臂上的两个开关管均断开,此时,与第六驱动桥臂相连的第五电机M5和第六电机M6无法形成电流回路,第五电机M5和第六电机M6不工作。
同时,控制单元控制第一驱动桥臂和第二驱动桥臂上的两个开关管中有一个开关管中有电流通过,控制第四驱动桥臂和第五驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第一电机M1和第四电机M4正常工作。
可以理解的,控制单元还可以在某一时段控制第一电机M1和第五电机M5同时工作,其控制方法与第一电机M1和第四电机M4同时工作的控制方法类似,只需要控制单元同时控制第一驱动桥臂、第二驱动桥臂、第四驱动桥臂和第六驱动桥臂中每个驱动桥臂中有一 个开关管中有电流流通,第三驱动桥臂和第五驱动桥臂中的所有开关管断开即可。
可以理解的,多电机驱动电路中还可以包括多组电机,控制单元可以同时控制任意几个不共用桥臂的电机同时进行工作,在此不做限定。
控制单元通过控制不同组中驱动桥臂的开关管的导通状态,可以使得多个不共用驱动桥臂的电机同时工作,这样可以避免多电机系统中电机不能同时工作的弊端,提供了新的多电机工作模式。
二、三相电机:
三相电机可以分为三相同步电机与三相异步电机。
三相异步电机是感应电动机的一种,是靠同时接入相位差120度的三相交流电流供电的一种电动机,其工作原理为,当电动机的三相定子绕组(各相差120度电角度),通入三相对称交流电后,将产生一个旋转磁场,该旋转磁场切割转子绕组,从而在转子绕组中产生感应电流,载流的转子导体在定子旋转磁场作用下将产生电磁力,从而在电机转轴上形成电磁转矩,驱动电动机旋转。
三相同步电机的工作原理为:当三相同步电机工作时,定子的三相绕组中通入三相对称电流,转子的励磁绕组通入直流电流。在定子三相对称绕组中通入三相交变电流时,将在气隙中产生旋转磁场,在转子励磁绕组中通入直流电流时,将产生极性恒定的静止磁场。若转子磁场的磁极对数与定子磁场的磁极对数相等,转子磁场因受定子磁场磁拉力作用而随定子旋转磁场同步旋转,即转子以等同于旋转磁场的速度、方向旋转。
因此,三相异步电机和三相同步电机都有三个电源接口,输入三相电机每个电源接口的电流都为交流电,此时,驱动电路的作用则为电机逆变器,负责将直流电源提供的直流电能转变为交流电,并将该交流电提供给三相电机。请参阅图4,为本申请实施例提供的另一多电机驱动电路的拓扑图。
如图4所示,驱动电路包括直流电源、四个三相电机,以及六个驱动桥臂,每一个驱动桥臂都包括两个串联开关管,且每个驱动桥臂分别与直流电源并联,四个电机与驱动桥臂相连;其中,每一个驱动桥臂被两个电机共用,每两个电机之间只共用一个驱动桥臂。
其中,第一三相电机M1的一个电源接口连接第一驱动桥臂,第二个电源接口连接第二驱动桥臂,第三个电源接口连接第三驱动桥臂;第二三相电机M2的一个电源接口连接第一驱动桥臂,第二个电源接口连接第四驱动桥臂,第三个电源接口连接第五驱动桥臂;第三三相电机M3的一个电源接口连接第二驱动桥臂,第二个电源接口连接第四驱动桥臂,第三个电源接口连接第六驱动桥臂;第四三相电机M4的一个电源接口连接第三驱动桥臂,第二个电源接口连接第五驱动桥臂,第三个电源接口连接第六驱动桥臂。
由于每一个驱动桥臂都包括两个开关管,因此第一驱动桥臂包括第一开关管和第二开关管,第二驱动桥臂至第六驱动桥臂依次包括第三开关管至第十二开关管;其中,第一开关管和第二开关管的中间点为第一驱动桥臂的第一输出端,第三开关管和第四开关管的中间点为第二输出端,第五开关管和第六开关管的中间点为第三输出端,第七开关管和第八开关管的中间点为第四输出端,第九开关管和第十开关管的中间点为第五输出端,第十一开关管和第十二开关管的中间点为第六输出端。
其中,第一三相电机的三个电源接口分别连接第一输出端、第二输出端和第三输出端;第二三相电机的三个电源接口分别连接第一输出端、第四输出端和第五输出端;第三三相电机的三个电源接口分别连接第二输出端、第四输出端和第六输出端;第四三相电机的三个电源接口分别连接第三输出端、第五输出端和第六输出端。
下面对该驱动电路的工作原理以及工作方式进行阐述:
(一)单电机工作模式:
在第一时段内,控制单元控制第四驱动桥臂、第五驱动桥臂和第六驱动桥臂上的所有的开关管均断开,此时,与第四驱动桥臂、第五驱动桥臂和第六驱动桥臂有连接关系的第二三相电机M2、第三三相电机M3和第四三相电机M4无法得到三相交流电,因此无法工作;同时控制单元控制第一驱动桥臂和第二驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第一三相电机M1正常工作,其电路的等效结构图如图4A所示。
在图4A中,第一驱动桥臂上的开关管依次为第一开关管和第二开关管,第二驱动桥臂上的开关管依次为第三开关管和第四开关管,第三驱动桥臂上的开关管依次为第五开关管和第六开关管;
可选的,控制单元可以控制第一开关管至第六开关管的导通状态,改变电流的流向,通过脉冲信号来控制多个开关管的导通与关断,将直流电流源提供的直流电转化为交流电,并为第一三相电机的三个接口输入相位差为120度的交流电,使得第一三相电机M1正常运行。
其中,开关包括管包括半导体器件,绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET,具体形式不做限定,当开关管为绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管时,反并联二极管的主要起续流的作用,避免晶体管或者三极管截止而引起的电流突变,起到平滑电流,保护电路中的原件不被损坏的作用。
在第二时段内,控制单元控制第二驱动桥臂、第三驱动桥臂和第六驱动桥臂上的所有开关管均断开,此时,与第二驱动桥臂、第三驱动桥臂和第六驱动桥臂有连接关系的第一三相电机M1、第三三相电机M3和第四三相电机M4无法得到三相交流电,因此无法工作,同时控制单元保证第一驱动桥臂、第四驱动桥臂和第五驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第二三相电机M2正常工作,第二三相电机M2的工作原理与第一时段中第一三相电机M1的工作原理类似,在此不做赘述。
在第三时段内,控制单元控制第一驱动桥臂、第三驱动桥臂和第五驱动桥臂上的所有开关管均断开,此时,与第一驱动桥臂、第三驱动桥臂和第五驱动桥臂有连接关系的第一三相电机M1、第二三相电机M2和第四三相电机M4无法得到三相交流电,因此无法工作,同时控制单元保证第二驱动桥臂、第四驱动桥臂和第六驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第三三相电机M3正常工作,第三三相电机M3的工作原理与第一时段中第一三相电机M1的工作原理类似,在此不做赘述。
在第四时段内,控制单元控制第一驱动桥臂、第二驱动桥臂和第四驱动桥臂上的所有 开关管均断开,此时,与第一驱动桥臂、第二驱动桥臂和第四驱动桥臂有连接关系的第一三相电机M1、第二三相电机M2和第三三相电机M3无法得到三相交流电,因此无法工作,同时控制单元保证第三驱动桥臂、第五驱动桥臂和第六驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第四三相电机M4正常工作,第四三相电机M4的工作原理与第一时段中第一三相电机M1的工作原理类似,在此不做赘述。
在本实施例中,控制单元在同一时段控制一个电机对应的所有驱动桥臂上的开关管,并且使其他驱动桥臂上的开关管全部断开,这个可以保证共用桥臂的多个电机在不同时段工作,相互不影响其工作,保证了共用桥臂的多个电机的独立工作。
请参阅图5,为本申请实施例提供的另一个多电机驱动电路的拓扑图。由于驱动桥臂与电机的联系方式为每一个驱动桥臂连接多个电机,每两个电机共用一个驱动桥臂,一个优选的方案即一个驱动桥臂连接两个电机,每两个电机共用一个驱动桥臂,此时,四个三相电机为一组,正好共用六个驱动桥臂,当多电机系统中存在六个以上的三相电机时,即四个三相电机为一组进行连接;如图5所示,该拓扑图中包括了两组三相电机,依次为第一电机M1至第八电机M8。
可以理解的,第五三相电机M5、第六三相电机M6、第七三相电机M7和第八三相电机M8的连接方式与第一三相电机M1、第二三相电机M2、第三三相电机M3和第四三相电机M4的连接方式类似,即共用第七驱动桥臂至第十二驱动桥臂。第五三相电机M5的三个接口分别连接第七驱动桥臂、第八驱动桥臂和第九驱动桥臂;第六三相电机M6的三个接口分别连接第七驱动桥臂、第十驱动桥臂和第十一驱动桥臂;第七三相电机M7的三个接口分别连接第八驱动桥臂、第十驱动桥臂和第十二驱动桥臂;第八三相电机M8的三个接口分别连接第九驱动桥臂、第十一驱动桥臂和第十二驱动桥臂。
第五三相电机M5、第六三相电机M6、第七三相电机M7和第八三相电机M8与驱动桥臂的连接方式也与第一三相电机M1、第二三相电机M2、第三三相电机M3和第四三相电机M4的连接方式类似;其中,第十三开关管和第十四开关管的中间点为第七输出端,第十五开关管和第十六开关管的中间点为第八输出端,第十七开关管和第十八开关管的中间点为第九输出端,第十九开关管和第二十开关管的中间点为第十输出端,第二十一开关管和第二十二开关管的中间点为第十一输出端,第二十三开关管和第二十四开关管的中间点为第十二输出端;即第五三相电机M5的三个接口分别连接第七输出端、第八输出端和第九输出端;第六三相电机M6的三个接口分别连接第七输出端、第十输出端和第十一输出端;第七三相电机M7的三个接口分别连接第八输出端、第十输出端和第十二输出端;第八三相电机M8的三个接口分别连接第九输出端、第十一输出端和第十二输出端。
第五三相电机M5、第六三相电机M6、第七三相电机M7和第八三相电机M8的单电机工作原理和工作模式与图4所示实施例中的单电机工作模式类似,在此不做赘述,下面对该驱动电路的多个电机进行工作的工作方式进行阐述。
(二)多电机工作模式:
共用桥臂的两个电机不能同时进行工作,但是,控制单元可以控制不共用桥臂的多个电机同时进行工作,示例性的,如图5所示,控制电机可以第一三相电机M1和第五电机 M5同时工作。其控制的方法为,在同一时段内,控制单元控制第四驱动桥臂至第六驱动桥臂上的所有开关管均断开,此时,与第四驱动桥臂至第六驱动桥臂具有连接关系的第二三相电机M2、第三三相电机M3和第四三相电机M3无法获得三相交流电,第二三相电机M2、第三三相电机M3和第四三相电机M3不工作;控制单元控制第十驱动桥臂至第十二驱动桥臂上的所有开关管均断开,此时,与第十驱动桥臂至第十二驱动桥臂具有连接关系的第六三相电机M6、第七三相电机M7和第八三相电机M8无法获得三相交流电,第六三相电机M6、第七三相电机M7和第八三相电机M8不工作。
同时,控制单元控制第一驱动桥臂、第二驱动桥臂和第三驱动桥臂上的两个开关管中有一个开关管中有电流通过,控制第七驱动桥臂、第八驱动桥臂和第九驱动桥臂上的两个开关管中有一个开关管中有电流通过,此时驱动电路驱动第一三相电机M1和第五三相电机M5正常工作。
可以理解的,控制单元还可以在某一时段控制第一三相电机M1和第六三相电机M6同时工作,其控制方法与第一三相电机M1和第五三相电机M5同时工作的控制方法类似,只需要控制单元同时控制第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第七驱动桥臂、第八驱动桥臂和第九驱动桥臂中每个驱动桥臂中有一个开关管中有电流流通,其余驱动桥臂中的所有开关管断开即可。
可以理解的,多电机驱动电路中还可以包括多组电机,控制单元可以同时控制任意几个不共用桥臂的电机同时进行工作,在此不做限定。
控制单元通过控制不同组中驱动桥臂的开关管的导通状态,可以使得多个不共用驱动桥臂的电机同时工作,这样可以避免多电机系统中电机不能同时工作的弊端,提供了新的多电机工作模式。
本申请实施例还提供了一种驱动桥臂电路,所述驱动桥臂电路包括至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个驱动桥臂中每一个驱动桥臂的输出端可与至少两个电机的两个电源接口连接。
其中,所述至少三个驱动桥臂与至少三个电机具有连接关系,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。
在一个可选的实施方式中,所述至少三个驱动桥臂包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂,所述至少三个电机包括第一电机,第二电机和第三电机,所述第一电机至第三电机均包括两个电源接口。
其中,所述第一驱动桥臂的第一输出端连接所述第一电机的第一电源接口和所述第二电机的第三电源接口,所述第二驱动桥臂的第二输出端连接所述第一电机的第二电源接口和所述第三电机的第五电源接口,所述第三驱动桥臂的第三输出端连接所述第二电机的第四电源接口和所述第三电机的第六电源接口。
在另一个可选的实施方式中,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第 五开关管和第六开关管。
其中,所述第一开关管、所述第三开关管和所述第五开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管和所述第六开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端。
在另一个可选的实施方式中,所述驱动桥臂电路由控制单元控制,所述控制单元具体用于在第一时段控制所述第一开关管、第二开关管、第三开关管和第四开关管的导通状态,为所述第一电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一电机提供电流,所述第五开关管和所述第六开关管断开。
所述控制单元还用于在第二时段控制所述第一开关管、第二开关管、第五开关管和第六开关管的导通状态,为所述第二电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第二电机提供电流,所述第三开关管和所述第四开关管断开。
所述控制单元还用于在第三时段控制所述第三开关管、第四开关管、第五开关管和第六开关管的导通状态,为所述第三电机提供电流;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第三电机提供电流,所述第一开关管和所述第二开关管断开。
在另一个可选的实施方式中,所述至少三个驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,所述至少三个电机包括第一三相电机,第二三相电机和第三三相电机,所述第一三相电机至第三三相电机均包括三个电源接口。
其中,所述第一驱动桥臂的第一输出端连接所述第一三相电机的第一电源接口和所述第二三相电机的第四电源接口;所述第二驱动桥臂的第二输出端连接所述第一三相电机的第二电源接口和所述第三三相电机的第七电源接口;所述第三驱动桥臂的第三输出端连接所述第一三相电机的第三电源接口和第四三相电机的第十电源接口;所述第四驱动桥臂的第四输出端连接所述第二三相电机的第五电源接口和所述第三三相电机的第八电源接口;所述第五驱动桥臂的第五输出端连接所述第二三相电机的第六电源接口和所述第四三相电机的第十一电源接口;所述第六驱动桥臂的第六输出端连接所述第三三相电机的第九电源接口和所述第四三相电机的第十二电源接口。
在另一个可选的实施方式中,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管,所述第四驱动桥臂包括串联的第七开关管和第八开关管,所述第五驱动桥臂包括串联的第九开关管和第十开关管,所述第六驱动桥臂包括串联的第十一开关管和第十二开关管。
其中,所述第一开关管、所述第三开关管、所述第五开关管、所述第七开关管、所述 第九开关管和所述第十一开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管、所述第六开关管、所述第八开关管、所述第十开关管和所述第十二开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端,所述第七开关管和所述第八开关管的中间点为所述第四输出端,所述第九开关管和所述第十开关管的中间点为所述第五输出端,所述第十一开关管和所述第十二开关管的中间点为所述第六输出端。
在另一个可选的实施方式中,所述驱动桥臂电路由控制单元控制,所述控制单元具体用于在第一时段控制所述第一驱动桥臂、第二驱动桥臂和第三驱动桥臂中开关管的导通状态,为所述第一三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一三相电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一三相电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第一三相电机提供电流,所述第七开关管、第八开关管、第九开关管、第十开关管、第十一开关管和第十二开关管断开。
所述控制单元还用于在第二时段控制所述第一驱动桥臂、第四驱动桥臂和第五驱动桥臂中开关管的导通状态,为所述第二三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二三相电机提供电流,所述第七开关管和第八开关管中有一个开关管为所述第二三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第二三相电机提供电流,所述第三开关管、第四开关管、第五开关管、第六开关管、第十一开关管和第十二开关管断开。
所述控制单元还用于在第三时段控制所述第二驱动桥臂、第四驱动桥臂和第六驱动桥臂中开关管的导通状态,为所述第三三相电机提供交流电;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三三相电机提供电流,所述第七开关管和第八开关管中有一个开关管为所述第三三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第三三相电机提供电流,所述第一开关管、第二开关管、第五开关管、第六开关管、第九开关管和第十开关管断开。
所述控制单元还用于在第四时段控制所述第三驱动桥臂、第五驱动桥臂和第六驱动桥臂中开关管的导通状态,为所述第四三相电机提供交流电;其中,所述第五开关管和所述第六开关管中有一个开关管为所述第四三相电机提供电流,所述第九开关管和第十开关管中有一个开关管为所述第四三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第四三相电机提供电流,所述第一开关管、第二开关管、第三开关管、第四开关管、第七开关管和第八开关管断开。
本申请实施例还提供了一种多电机驱动电路的控制方法,包括:
控制单元确定多电机驱动电路的目标驱动桥臂;其中,所述多电机驱动电路包括至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个驱动桥臂中每一个驱动桥臂的输出端可与至少两个电机的两个电源接口连接。
其中,所述至少三个驱动桥臂与至少三个电机具有连接关系,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。
所述控制单元控制所述目标驱动桥臂中开关管的导通状态,以使得所述目标驱动桥臂为所诉至少三个电机提供电流。
在一个可选的实施方式中,所述至少三个驱动桥臂包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂,所述至少三个电机包括第一电机,第二电机和第三电机,所述第一电机至第三电机均包括两个电源接口;所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管。
其中,所述第一开关管、所述第三开关管和所述第五开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管和所述第六开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端。
其中,所述第一驱动桥臂的第一输出端连接所述第一电机的第一电源接口和所述第二电机的第三电源接口,所述第二驱动桥臂的第二输出端连接所述第一电机的第二电源接口和所述第三电机的第五电源接口,所述第三驱动桥臂的第三输出端连接所述第二电机的第四电源接口和所述第三电机的第六电源接口。
在另一个可选的实施方式中,所述控制单元控制所述目标驱动桥臂中开关管的导通状态,包括:所述控制单元在第一时段控制所述第一开关管至第六开关管的导通状态,为所述第一电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一电机提供电流,所述第五开关管和所述第六开关管断开。
所述控制单元在第二时段控制所述第一开关管至第六开关管的导通状态,为所述第二电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第二电机提供电流,所述第三开关管和所述第四开关管断开。
所述控制单元在第三时段控制所述第一开关管至第六开关管的导通状态,为所述第三电机提供电流;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第三电机提供电流,所述第一开关管和所述第二开关管断开。
在另一个可选的实施方式中,所述至少三个驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,所述至少三个电机包括第一三相电机,第二三相电机和第三三相电机,所述第一三相电机至第三三相电机均包括三个电源接口。
其中,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管,所述第四驱动桥臂包括串联的第七开关管和第八开关管,所述第五驱动桥臂包括串联的第九开关管和第十开关管,所述第六驱动桥臂包括串联的第十一开关管和第十二开关管。
其中,所述第一开关管、所述第三开关管、所述第五开关管、所述第七开关管、所述第九开关管和所述第十一开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管、所述第六开关管、所述第八开关管、所述第十开关管和所述第十二开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端,所述第七开关管和所述第八开关管的中间点为所述第四输出端,所述第九开关管和所述第十开关管的中间点为所述第五输出端,所述第十一开关管和所述第十二开关管的中间点为所述第六输出端。
其中,所述第一驱动桥臂的第一输出端连接所述第一三相电机的第一电源接口和所述第二三相电机的第四电源接口;所述第二驱动桥臂的第二输出端连接所述第一三相电机的第二电源接口和所述第三三相电机的第七电源接口;所述第三驱动桥臂的第三输出端连接所述第一三相电机的第三电源接口和第四三相电机的第十电源接口;所述第四驱动桥臂的第四输出端连接所述第二三相电机的第五电源接口和所述第三三相电机的第八电源接口;所述第五驱动桥臂的第五输出端连接所述第二三相电机的第六电源接口和所述第四三相电机的第十一电源接口;所述第六驱动桥臂的第六输出端连接所述第三三相电机的第九电源接口和所述第四三相电机的第十二电源接口。
在另一个可选的实施方式中,所述控制单元在第一时段控制所述第一开关管至第十二开关管的导通状态,为所述第一三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一三相电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一三相电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第一三相电机提供电流,所述第七开关管、第八开关管、第九开关管、第十开关管、第十一开关管和第十二开关管断开。
所述控制单元在第二时段控制所述第一开关管至第十二开关管的导通状态,为所述第二三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二三相电机提供电流,所述第七开关管和第八开关管中有一个开关管为所述第二三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第二三相电机提供电流,所述第三开关管、第四开关管、第五开关管、第六开关管、第十一开关管和第十二开关管断开。
所述控制单元在第三时段控制所述第一开关管至第十二开关管的导通状态,为所述第三三相电机提供交流电;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三三相电机提供电流,所述第七开关管和第八开关管中有一个开关管为所述第三三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第三三相电机提供电流,所述第一开关管、第二开关管、第五开关管、第六开关管、第九开关管和第十 开关管断开。
所述控制单元在第四时段控制所述第一开关管至第十二开关管的导通状态,为所述第四三相电机提供交流电;其中,所述第五开关管和所述第六开关管中有一个开关管为所述第四三相电机提供电流,所述第九开关管和第十开关管中有一个开关管为所述第四三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第四三相电机提供电流,所述第一开关管、第二开关管、第三开关管、第四开关管、第七开关管和第八开关管断开。
本申请实施例还提供了一种控制单元,所述控制单元用于执行如本申请实施例提供的多电机驱动电路的控制方法中任一项所述的方法。
本申请实施例第五方面提供了一种车辆,所述车辆包括如本申请实施例提供的多电机驱动电路中任一项所述的多电机驱动电路。
以上对本申请实施例所提供的驱动电路进行了详细介绍,本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请的方法及其核心思想;同时,对于本领域的一般技术人员,依据本申请的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本申请的限制。

Claims (21)

  1. 一种多电机驱动电路,其特征在于,所述多电机驱动电路包括至少三个电机以及至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个电机中每个电机包括至少两个电源接口,所述至少三个驱动桥臂与所述至少三个电机具有连接关系;
    其中,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。
  2. 根据权利要求1所述的多电机驱动电路,其特征在于,所述至少三个电机包括第一电机,第二电机和第三电机,所述第一电机、所述第二电机和所述第三电机均包括两个接口,所述至少三个驱动桥臂包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂;
    其中,所述第一电机的第一电源接口连接所述第一驱动桥臂,所述第一电机的第二电源接口连接所述第二驱动桥臂,所述第二电机的第三电源接口连接所述第一驱动桥臂,所述第二电机的第四电源接口连接所述第三驱动桥臂,所述第三电机的第五电源接口连接所述第二驱动桥臂,所述第三电机的第六电源接口连接所述第三驱动桥臂。
  3. 根据权利要求2所述的多电机驱动电路,其特征在于,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管;
    其中,所述第一开关管、所述第三开关管和所述第五开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管和所述第六开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为第一输出端,所述第三开关管和所述第四开关管的中间点为第二输出端,所述第五开关管和所述第六开关管的中间点为第三输出端;
    其中,所述第一电源接口连接所述第一输出端,所述第二电源接口连接所述第二输出端,所述第三电源接口连接所述第一输出端,所述第四电源接口连接所述第三输出端,所述第五电源接口连接所述第二输出端,所述第六电源接口连接所述第三输出端。
  4. 根据权利要求3所述的多电机驱动电路,其特征在于,所述至少三个驱动桥臂由控制单元进行控制;所述控制单元具体用于在第一时段控制所述第一开关管、所述第二开关管、所述第三开关管和所述第四开关管的导通状态,为所述第一电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一电机提供电流,所述第五开关管和所述第六开关管断开;
    所述控制单元还用于在第二时段控制所述第一开关管、所述第二开关管、所述第五开关管和所述第六开关管的导通状态,为所述第二电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第二电机提供电流,所述第三开关管和所述第四开关管断开;
    所述控制单元还用于在第三时段控制所述第三开关管、所述第四开关管、所述第五开 关管和所述第六开关管的导通状态,为所述第三电机提供电流;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第三电机提供电流,所述第一开关管和所述第二开关管断开。
  5. 根据权利要求3所述的多电机驱动电路,其特征在于,所述多电机驱动电路还包括第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,所述第四驱动桥臂、所述第五驱动桥臂和所述第六驱动桥臂与所述直流电源并联;
    其中,所述第四驱动桥臂包括串联的第七开关管和第八开关管,所述第五驱动桥臂包括串联的第九开关管和第十开关管,所述第六驱动桥臂包括串联的第十一开关管和第十二开关管,所述第七开关管、所述第九开关管和所述第十一开关管分别与所述直流电源的正极相连,所述第八开关管、所述第十开关管和所述第十二开关管分别与所述直流电源的负极相连;
    其中,所述第七开关管和所述第八开关管的中间点为第四输出端,所述第九开关管和所述第十开关管的中间点为第五输出端,所述第十一开关管和所述第十二开关管的中间点为第六输出端;
    所述多电机驱动电路还包括第四电机,第五电机和第六电机,所述第四电机,所述第五电机和所述第六电机均包括两个电源接口;
    其中,所述第四电机的第七电源接口与所述第四输出端相连,所述第四电机的第八电源接口与所述第五输出端相连,所述第五电机的第九电源接口与所述第四输出端相连,所述第五电机的第十电源接口与所述第六输出端相连,所述第六电机的第十一电源接口与所述第五输出端相连,所述第六电机的第十二电源接口与所述第六输出端相连。
  6. 根据权利要求5所述的多电机驱动电路,其特征在于,所述第一驱动桥臂至所述第六驱动桥臂由控制单元进行控制;所述控制单元具体用于在同一时段,控制所述第一驱动桥臂和所述第二驱动桥臂的开关管的导通状态为所述第一电机提供电流,控制所述第四驱动桥臂和所述第五驱动桥臂的开关管的导通状态为所述第四电机提供电流;
    其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一电机提供电流,所述第三开关管和所述第四开关管中有一个开关管为所述第一电机提供电流,所述第七开关管和所述第八开关管中有一个开关管为所述第四电机提供电流,所述第九开关管和第十开关管中有一个开关管为所述第四电机提供电流,所述第五开关管、所述第六开关管、所述第十一开关管和所述第十二开关管均断开。
  7. 根据权利要求1至6任一项所述的多电机驱动电路,其特征在于,所述开关装置包括半导体器件,所述半导体器件包括:绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET。
  8. 根据权利要求1所述的多电机驱动电路,其特征在于,所述至少三个电机包括第一三相电机、第二三相电机、第三三相电机和第四三相电机;所述至少三个驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂、第六驱动桥臂;所述至少三个电机均包括三个电源接口;
    其中,所述第一三相电机的第一电源接口连接所述第一驱动桥臂,所述第一三相电机 的第二电源接口连接所述第二驱动桥臂,所述第一三相电机的第三电源接口连接所述第三驱动桥臂;
    所述第二三相电机的第四电源接口连接所述第一驱动桥臂,所述第二三相电机的第五电源接口连接所述第四驱动桥臂,所述第二三相电机的第六电源接口连接所述第五驱动桥臂;
    所述第三三相电机的第七电源接口连接所述第二驱动桥臂,所述第三三相电机的第八电源接口连接所述第四驱动桥臂,所述第三三相电机的第九电源接口连接所述第六驱动桥臂;
    所述第四三相电机的第十电源接口连接所述第三驱动桥臂,所述第四三相电机的第十一电源接口连接所述第五驱动桥臂,所述第四三相电机的第十二电源接口连接所述第六驱动桥臂。
  9. 根据权利要求8所述的多电机驱动电路,其特征在于,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管,所述第四驱动桥臂包括串联的第七开关管和第八开关管,所述第五驱动桥臂包括串联的第九开关管和第十开关管,所述第六驱动桥臂包括串联的第十一开关管和第十二开关管;
    其中,所述第一开关管、所述第三开关管、所述第五开关管、所述第七开关管、所述第九开关管和所述第十一开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管、所述第六开关管、所述第八开关管、所述第十开关管和所述第十二开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为第一输出端,所述第三开关管和所述第四开关管的中间点为第二输出端,所述第五开关管和所述第六开关管的中间点为第三输出端,所述第七开关管和所述第八开关管的中间点为第四输出端,所述第九开关管和所述第十开关管的中间点为第五输出端,所述第十一开关管和所述第十二开关管的中间点为第六输出端;
    其中,所述第一三相电机的第一电源接口连接所述第一输出端,所述第一三相电机的第二电源接口连接所述第二输出端,所述第一三相电机的第三电源接口连接所述第三输出端;
    所述第二三相电机的第四电源接口连接所述第一输出端,所述第二三相电机的第五电源接口连接所述第四输出端,所述第二三相电机的第六电源接口连接所述第五输出端;
    所述第三三相电机的第七电源接口连接所述第二输出端,所述第三三相电机的第八电源接口连接所述第四输出端,所述第三三相电机的第九电源接口连接所述第六输出端;
    所述第四三相电机的第十电源接口连接所述第三输出端,所述第四三相电机的第十一电源接口连接所述第五输出端,所述第四三相电机的第十二电源接口连接所述第六输出端。
  10. 根据权利要求9所述的多电机驱动电路,其特征在于,所述第一驱动桥臂至所述第六驱动桥臂由控制单元控制,所述控制单元具体用于在第一时段控制所述第一驱动桥臂、所述第二驱动桥臂和所述第三驱动桥臂中开关管的导通状态,为所述第一三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一三相电机提供 电流,所述第三开关管和所述第四开关管中有一个开关管为所述第一三相电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第一三相电机提供电流,所述第七开关管、所述第八开关管、所述第九开关管、所述第十开关管、所述第十一开关管和所述第十二开关管断开;
    所述控制单元还用于在第二时段控制所述第一驱动桥臂、所述第四驱动桥臂和所述第五驱动桥臂中开关管的导通状态,为所述第二三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二三相电机提供电流,所述第七开关管和第八开关管中有一个开关管为所述第二三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第二三相电机提供电流,所述第三开关管、所述第四开关管、所述第五开关管、所述第六开关管、所述第十一开关管和所述第十二开关管断开;
    所述控制单元还用于在第三时段控制所述第二驱动桥臂、所述第四驱动桥臂和所述第六驱动桥臂中开关管的导通状态,为所述第三三相电机提供交流电;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三三相电机提供电流,所述第七开关管和所述第八开关管中有一个开关管为所述第三三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第三三相电机提供电流,所述第一开关管、所述第二开关管、所述第五开关管、所述第六开关管、所述第九开关管和所述第十开关管断开;
    所述控制单元还用于在第四时段控制所述第三驱动桥臂、所述第五驱动桥臂和所述第六驱动桥臂中开关管的导通状态,为所述第四三相电机提供交流电;其中,所述第五开关管和所述第六开关管中有一个开关管为所述第四三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第四三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第四三相电机提供电流,所述第一开关管、所述第二开关管、所述第三开关管、所述第四开关管、所述第七开关管和所述第八开关管断开。
  11. 根据权利要求10所述的多电机驱动电路,其特征在于,所述多电机驱动电路还包括第七驱动桥臂、第八驱动桥臂、第九驱动桥臂、第十驱动桥臂、第十一驱动桥臂和第十二驱动桥臂,所述第七驱动桥臂、所述第八驱动桥臂、所述第九驱动桥臂、所述第十驱动桥臂、所述第十一驱动桥臂、所述第十二驱动桥臂与所述直流电源并联;
    其中,所述第七驱动桥臂包括串联的第十三开关管和第十四开关管,所述第八驱动桥臂包括串联的第十五开关管和第十六开关管,所述第九驱动桥臂包括串联的第十七开关管和第十八开关管,所述第十驱动桥臂包括串联的第十九开关管和第二十开关管,所述第十一驱动桥臂包括串联的第二十一开关管和第二十二开关管,所述第十二驱动桥臂包括串联的第二十三开关管和第二十四开关管;
    所述第十三开关管、所述第十五开关管、所述第十七开关管、所述第十九开关管、所述第二十一开关管和所述第二十三开关管分别与所述直流电源的正极相连,所述第十四开关管、所述第十六开关管、所述第十八开关管、所述第二十开关管、所述第二十二开关管和所述第二十四开关管分别与所述直流电源的负极相连;
    其中,所述第十三开关管和所述第十四开关管的中间点为第七输出端,所述第十五开关管和所述第十六开关管的中间点为第八输出端,所述第十七开关管和所述第十八开关管 的中间点为第九输出端,所述第十九开关管和所述第二十开关管的中间点为第十输出端,所述第二十一开关管和所述第二十二开关管的中间点为第十一输出端,所述第二十三开关管和所述第二十四开关管的中间点为第十二输出端;
    所述多电机驱动电路还包括第五三相电机、第六三相电机、第七三相电机和第八三相电机,其中,所述第五三相电机的第十三电源接口连接所述第七输出端,所述第五三相电机的第十四电源接口连接所述第八输出端,所述第五三相电机的第十五电源接口连接所述第九输出端;
    所述第六三相电机的第十六电源接口连接所述第七输出端,所述第六三相电机的第十七电源接口连接所述第十输出端,所述第六三相电机的第十八电源接口连接所述第十一输出端;
    所述第七三相电机的第十九电源接口连接所述第八输出端,所述第七三相电机的第二十电源接口连接所述第十输出端,所述第七三相电机的第二十一电源接口连接所述第十二输出端;
    所述第八三相电机的第二十二电源接口连接所述第九输出端,所述第八三相电机的第二十三电源接口连接所述第十一输出端,所述第八三相电机的第二十四电源接口连接所述第十二输出端。
  12. 根据权利要求11所述的多电机驱动电路,其特征在于,所述控制单元具体用于在同一时段,控制所述第一驱动桥臂、所述第二驱动桥臂和所述第三驱动桥臂的开关管的导通状态为所述第一三相电机提供电流,控制所述第七驱动桥臂、所述第八驱动桥臂和所述第九驱动桥臂的开关管的导通状态为所述第五三相电机提供电流;
    其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一三相电机提供电流,所述第三开关管和第四开关管中有一个开关管为所述第一三相电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第一三相电机提供电流,所述第十三开关管和所述第十四开关管中有一个开关管为所述第五三相电机提供电流,所述第十五开关管和第十六开关管中有一个开关管为所述第五三相电机提供电流,所述第十七开关管和所述第十八开关管中有一个开关管为所述第五三相电机提供电流,所述第七开关管至所述第十二开关管和所述第十九开关管至所述第二十四开关管均断开。
  13. 根据权利要求8至12任一项所述的多电机驱动电路,其特征在于,所述开关装置包括半导体器件,所述半导体器件包括:绝缘栅双极型晶体管IGBT和/或三级管及其反并联二极管和/或金属-氧化物半导体场效应晶体管MOSFET。
  14. 一种驱动桥臂电路,其特征在于,所述驱动桥臂电路包括至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个驱动桥臂中每一个驱动桥臂的输出端可与至少两个电机的两个电源接口连接;
    其中,所述至少三个驱动桥臂与至少三个电机具有连接关系,所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机。
  15. 一种多电机驱动电路的控制方法,其特征在于,所述方法包括:
    控制单元确定多电机驱动电路的目标驱动桥臂;
    其中,所述多电机驱动电路包括至少三个电机以及至少三个驱动桥臂,所述至少三个驱动桥臂并联,且所述至少三个驱动桥臂与直流电源并联,所述至少三个电机中每个电机包括至少两个电源接口,所述至少三个驱动桥臂与所述至少三个电机具有连接关系;所述连接关系满足:电机i的至少两个电源接口分别连接的至少两个驱动桥臂与电机j的至少两个电源接口分别连接的至少两个驱动桥臂,存在至少一个不相同的驱动桥臂,所述电机i和所述电机j为所述至少三个电机中的任两个电机;
    所述控制单元控制所述目标驱动桥臂中开关管的导通状态,以使得所述目标驱动桥臂为所诉至少三个电机提供电流。
  16. 根据权利要求15所述的控制方法,其特征在于,所述至少三个驱动桥臂包括第一驱动桥臂,第二驱动桥臂和第三驱动桥臂,所述至少三个电机包括第一电机,第二电机和第三电机,所述第一电机至所述第三电机均包括两个电源接口;
    所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管;
    其中,所述第一开关管、所述第三开关管和所述第五开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管和所述第六开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端;
    其中,所述第一驱动桥臂的第一输出端连接所述第一电机的第一电源接口和所述第二电机的第三电源接口,所述第二驱动桥臂的第二输出端连接所述第一电机的第二电源接口和所述第三电机的第五电源接口,所述第三驱动桥臂的第三输出端连接所述第二电机的第四电源接口和所述第三电机的第六电源接口。
  17. 根据权利要求16所述的控制方法,其特征在于,所述控制单元控制所述目标驱动桥臂中开关管的导通状态,包括:
    所述控制单元在第一时段控制所述第一开关管至所述第六开关管的导通状态,为所述第一电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一电机提供电流,所述第三开关管和所述第四开关管中有一个开关管为所述第一电机提供电流,所述第五开关管和所述第六开关管断开;
    所述控制单元在第二时段控制所述第一开关管至所述第六开关管的导通状态,为所述第二电机提供电流;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第二电机提供电流,所述第三开关管和所述第四开关管断开;
    所述控制单元在第三时段控制所述第一开关管至所述第六开关管的导通状态,为所述第三电机提供电流;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三电机提供电流,所述第五开关管和第六开关管中有一个开关管为所述第三电机提供电流, 所述第一开关管和所述第二开关管断开。
  18. 根据权利要求16所述的控制方法,其特征在于,所述至少三个驱动桥臂包括第一驱动桥臂、第二驱动桥臂、第三驱动桥臂、第四驱动桥臂、第五驱动桥臂和第六驱动桥臂,所述至少三个电机包括第一三相电机,第二三相电机和第三三相电机,所述第一三相电机至所述第三三相电机均包括三个电源接口;
    其中,所述第一驱动桥臂包括串联的第一开关管和第二开关管,所述第二驱动桥臂包括串联的第三开关管和第四开关管,所述第三驱动桥臂包括串联的第五开关管和第六开关管,所述第四驱动桥臂包括串联的第七开关管和第八开关管,所述第五驱动桥臂包括串联的第九开关管和第十开关管,所述第六驱动桥臂包括串联的第十一开关管和第十二开关管;
    其中,所述第一开关管、所述第三开关管、所述第五开关管、所述第七开关管、所述第九开关管和所述第十一开关管分别与所述直流电源的正极相连,所述第二开关管、所述第四开关管、所述第六开关管、所述第八开关管、所述第十开关管和所述第十二开关管分别与所述直流电源的负极相连,所述第一开关管和所述第二开关管的中间点为所述第一输出端,所述第三开关管和所述第四开关管的中间点为所述第二输出端,所述第五开关管和所述第六开关管的中间点为所述第三输出端,所述第七开关管和所述第八开关管的中间点为所述第四输出端,所述第九开关管和所述第十开关管的中间点为所述第五输出端,所述第十一开关管和所述第十二开关管的中间点为所述第六输出端;
    其中,所述第一驱动桥臂的第一输出端连接所述第一三相电机的第一电源接口和所述第二三相电机的第四电源接口;所述第二驱动桥臂的第二输出端连接所述第一三相电机的第二电源接口和所述第三三相电机的第七电源接口;所述第三驱动桥臂的第三输出端连接所述第一三相电机的第三电源接口和第四三相电机的第十电源接口;所述第四驱动桥臂的第四输出端连接所述第二三相电机的第五电源接口和所述第三三相电机的第八电源接口;所述第五驱动桥臂的第五输出端连接所述第二三相电机的第六电源接口和所述第四三相电机的第十一电源接口;所述第六驱动桥臂的第六输出端连接所述第三三相电机的第九电源接口和所述第四三相电机的第十二电源接口。
  19. 根据权利要求18所述的控制方法,其特征在于,所述控制单元控制所述目标驱动桥臂中开关管的导通状态,包括:
    所述控制单元在第一时段控制所述第一开关管至所述第十二开关管的导通状态,为所述第一三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第一三相电机提供电流,所述第三开关管和所述第四开关管中有一个开关管为所述第一三相电机提供电流,所述第五开关管和所述第六开关管中有一个开关管为所述第一三相电机提供电流,所述第七开关管、所述第八开关管、所述第九开关管、所述第十开关管、所述第十一开关管和所述第十二开关管断开;
    所述控制单元在第二时段控制所述第一开关管至所述第十二开关管的导通状态,为所述第二三相电机提供交流电;其中,所述第一开关管和所述第二开关管中有一个开关管为所述第二三相电机提供电流,所述第七开关管和所述第八开关管中有一个开关管为所述第二三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第二三相 电机提供电流,所述第三开关管、所述第四开关管、所述第五开关管、所述第六开关管、所述第十一开关管和所述第十二开关管断开;
    所述控制单元在第三时段控制所述第一开关管至所述第十二开关管的导通状态,为所述第三三相电机提供交流电;其中,所述第三开关管和所述第四开关管中有一个开关管为所述第三三相电机提供电流,所述第七开关管和所述第八开关管中有一个开关管为所述第三三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第三三相电机提供电流,所述第一开关管、所述第二开关管、所述第五开关管、所述第六开关管、所述第九开关管和所述第十开关管断开;
    所述控制单元在第四时段控制所述第一开关管至所述第十二开关管的导通状态,为所述第四三相电机提供交流电;其中,所述第五开关管和所述第六开关管中有一个开关管为所述第四三相电机提供电流,所述第九开关管和所述第十开关管中有一个开关管为所述第四三相电机提供电流,所述第十一开关管和所述第十二开关管中有一个开关管为所述第四三相电机提供电流,所述第一开关管、所述第二开关管、所述第三开关管、所述第四开关管、所述第七开关管和所述第八开关管断开。
  20. 一种控制单元,其特征在于,所述控制单元用于执行权利要求15-19中任一项所述的方法。
  21. 一种车辆,其特征在于,所述车辆包括权利要求1-13中任一项所述的多电机驱动电路。
PCT/CN2020/082382 2020-03-31 2020-03-31 一种多电机驱动电路及其控制方法 WO2021195945A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/082382 WO2021195945A1 (zh) 2020-03-31 2020-03-31 一种多电机驱动电路及其控制方法
CN202080005493.1A CN112789800A (zh) 2020-03-31 2020-03-31 一种多电机驱动电路及其控制方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/082382 WO2021195945A1 (zh) 2020-03-31 2020-03-31 一种多电机驱动电路及其控制方法

Publications (1)

Publication Number Publication Date
WO2021195945A1 true WO2021195945A1 (zh) 2021-10-07

Family

ID=75754006

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/082382 WO2021195945A1 (zh) 2020-03-31 2020-03-31 一种多电机驱动电路及其控制方法

Country Status (2)

Country Link
CN (1) CN112789800A (zh)
WO (1) WO2021195945A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114301367B (zh) * 2022-01-18 2023-10-20 华中科技大学 一种四开关逆变器双电机控制系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003274667A (ja) * 2002-03-14 2003-09-26 Toshiba Corp 三相インバータ用パワーモジュールおよび三相モータ駆動システム
CN106685269A (zh) * 2016-12-09 2017-05-17 上海交通大学 用于双电机的逆变器拓扑结构
CN106788097A (zh) * 2016-12-30 2017-05-31 东南大学 一种用于城市轨道交通的非对称永磁直线电机牵引系统
CN109586620A (zh) * 2018-12-06 2019-04-05 北京经纬恒润科技有限公司 多目标控制方法、装置及多目标驱动控制电路
CN210129830U (zh) * 2019-07-15 2020-03-06 浙江捷昌线性驱动科技股份有限公司 多电机共用桥臂控制电路

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2811655B2 (ja) * 1985-10-09 1998-10-15 オリンパス光学工業株式会社 カメラのモータ駆動回路
KR20130047446A (ko) * 2011-10-31 2013-05-08 주식회사 현대케피코 비동시적 동작 모터의 모터 드라이브 개수를 감축한 모터 제어 시스템 및 그 설계 방법
JP5772726B2 (ja) * 2012-05-31 2015-09-02 株式会社デンソー 空調装置用制御装置
JP5483224B1 (ja) * 2013-02-05 2014-05-07 西芝電機株式会社 両頭船の電気推進装置
JP6052028B2 (ja) * 2013-04-03 2016-12-27 株式会社デンソー モータ制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003274667A (ja) * 2002-03-14 2003-09-26 Toshiba Corp 三相インバータ用パワーモジュールおよび三相モータ駆動システム
CN106685269A (zh) * 2016-12-09 2017-05-17 上海交通大学 用于双电机的逆变器拓扑结构
CN106788097A (zh) * 2016-12-30 2017-05-31 东南大学 一种用于城市轨道交通的非对称永磁直线电机牵引系统
CN109586620A (zh) * 2018-12-06 2019-04-05 北京经纬恒润科技有限公司 多目标控制方法、装置及多目标驱动控制电路
CN210129830U (zh) * 2019-07-15 2020-03-06 浙江捷昌线性驱动科技股份有限公司 多电机共用桥臂控制电路

Also Published As

Publication number Publication date
CN112789800A (zh) 2021-05-11

Similar Documents

Publication Publication Date Title
US6163472A (en) Elevator DC motor drive with unity power factor, including regeneration
US7253574B2 (en) Effective switching frequency multiplier inverter
CN102577085A (zh) 无传感器无刷直流马达的同步最小频率脉宽调制驱动
CN106849824B (zh) 电动驱动装置、电动驱动系统以及电动设备
CN110474580B (zh) 一种起动发电系统功率变换器及其控制方法
CN109787532B (zh) 一种三相变结构逆变器及其控制方法
CN108258945B (zh) 一种双永磁同步电机九开关逆变器及其控制方法
US6642683B1 (en) Controller and associated drive assembly for power sharing, time sliced control of a brushless direct current motor
WO2019141086A1 (zh) 五相逆变器双三相电机驱动电路及系统矢量控制方法
US20150097505A1 (en) Current source inverter device
WO2021195945A1 (zh) 一种多电机驱动电路及其控制方法
CN104052342B (zh) 一种电机控制装置及具有其的空调系统
WO2022142310A1 (zh) 驱动控制电路、驱动控制方法、线路板及空调器
CN108092564B (zh) 一种双电机八开关逆变器驱动系统及其控制方法
CN106972802A (zh) 控制电机驱动系统直流母线电压的方法和装置
CN206727920U (zh) 一种多相永磁纯方波电机控制系统
CN108233783B (zh) 一种双电机三桥臂逆变器及其控制方法
CN108173472B (zh) 一种双三相电机五相逆变器及控制方法
Mochiyama et al. Power packet dispatching with shared power line: experimental verification for industrial applications
RU2662233C1 (ru) Индукторная электрическая машина
CN110707989A (zh) 三相半桥-串联绕组拓扑结构切换的逆变器及其切换方法
JP3950382B2 (ja) 回生型直流コンバータおよび直流モータシステム
Su et al. Design of a PM brushless motor drive for hybrid electrical vehicle application
CN210927489U (zh) 一种三相开关磁阻电机快速制动控制系统
CN108134543B (zh) 一种双三相电机四桥臂逆变器及其控制方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20929512

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20929512

Country of ref document: EP

Kind code of ref document: A1