WO2024005116A1 - モータ制御装置及びモータ制御方法 - Google Patents
モータ制御装置及びモータ制御方法 Download PDFInfo
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- WO2024005116A1 WO2024005116A1 PCT/JP2023/024109 JP2023024109W WO2024005116A1 WO 2024005116 A1 WO2024005116 A1 WO 2024005116A1 JP 2023024109 W JP2023024109 W JP 2023024109W WO 2024005116 A1 WO2024005116 A1 WO 2024005116A1
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- Prior art keywords
- arm
- switching element
- motor
- side switching
- low
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
Definitions
- the present disclosure relates to a motor control device and a motor control method.
- An example of a vehicle equipped with a three-phase motor is an EV (electric vehicle, including two-wheeled vehicles and four-wheeled vehicles).
- EV electric vehicle, including two-wheeled vehicles and four-wheeled vehicles.
- Patent Documents 1 and 2 describe techniques for suppressing torque fluctuations when switching from rectangular wave control to sine wave control.
- vibration and sound are generated during the period when 120° square wave control is performed.
- the present disclosure aims to suppress vibrations and sounds generated during 120° square wave control.
- the motor control device of the present disclosure includes: an inverter circuit including a first arm, a second arm, and a third arm electrically connected to a first phase terminal, a second phase terminal, and a third phase terminal, respectively, of a three-phase motor;
- an inverter circuit including a first arm, a second arm, and a third arm electrically connected to a first phase terminal, a second phase terminal, and a third phase terminal, respectively, of a three-phase motor;
- the high side switching element of the first arm is controlled to be turned on
- the low side switching element is controlled to be turned off
- the high side and low side switching elements of the second arm are controlled to be turned off
- the high side switching element of the second arm is controlled to be turned off.
- the high-side switching element of the first arm is controlled to be turned off
- the low-side switching element is controlled to be turned on
- the high-side switching element of the second arm is controlled to be turned on.
- the control circuit includes: In the second period, the low-side switching element of the first arm is controlled by pulse width modulation so that the voltage between the first phase terminal of the three-phase motor and the neutral point of the three-phase motor becomes zero. do, It is characterized by
- the control circuit includes: In a third period following the second period, the high-side switching element of the first arm is controlled to be turned off, the low-side switching element is controlled to be turned on, and the high-side switching element of the second arm is controlled to be turned on. and controlling the low side switching element to turn off, controlling the high side switching element of the third arm to turn on, and controlling the low side switching element to turn off. It is characterized by
- the control circuit includes: In the third period, the high-side switching element of the third arm is pulse width modulated so that the voltage between the third phase terminal of the three-phase motor and the neutral point of the three-phase motor becomes zero. Control, It is characterized by
- the motor control method of the present disclosure includes: In the first period, the high-side switching element of the first arm electrically connected to the first phase terminal of the three-phase motor is controlled to be turned on, the low-side switching element is controlled to be turned off, and the three-phase motor is The high side and low side switching elements of the second arm electrically connected to the second phase terminal are controlled off, and the high side of the third arm electrically connected to the third phase terminal of the three-phase motor.
- the switching element on the low side is controlled to be turned off, the low side switching element is controlled to be turned on,
- the high-side switching element of the first arm is controlled to be turned off
- the low-side switching element is controlled to be turned on
- the high-side switching element of the second arm is controlled to be turned on. and controlling the low side switching element to turn off, controlling the high side switching element of the third arm to turn off, and controlling the low side switching element to turn on. It is characterized by
- vibrations and sounds generated during the 120° square wave control can be suppressed.
- FIG. 1 is a diagram showing the configuration of a motor control device of a comparative example.
- FIG. 2 is a diagram showing circuit simulation results of a comparative example.
- FIG. 3 is a diagram showing the configuration of the motor control device according to the embodiment.
- FIG. 4 is a diagram showing circuit simulation results of the embodiment.
- FIG. 5 is a flowchart of the motor control device according to the embodiment.
- an EV will be described as an example of an object equipped with a motor control device and a motor, but the present disclosure is not limited thereto.
- the present disclosure is applicable to various types of objects including motor control devices and motors.
- FIG. 1 is a diagram showing the configuration of a motor control device of a comparative example.
- the motor control device 101 receives the voltage Vin from the DC power supply 2 and operates the motor 7 .
- the motor control device 101 includes an inverter 10 and a control circuit 102.
- the inverter 10 includes a first arm 10U, a second arm 10V, and a third arm 10W.
- Inverter 10 is a three-phase inverter including three arms.
- the first arm 10U is a U-phase arm.
- the second arm 10V is a V-phase arm.
- the third arm 10W is a W-phase arm.
- the phase difference between the first arm 10U and the second arm 10V is 120 degrees.
- the phase difference between the second arm 10V and the third arm 10W is 120 degrees.
- the phase difference between the third arm 10W and the first arm 10U is 120 degrees.
- the first arm 10U includes a high-side transistor 11 and a low-side transistor 12.
- each transistor is a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), but the present disclosure is not limited thereto.
- Each transistor may be a silicon power device, a GaN power device, a SiC power device, or the like.
- Each transistor has a parasitic diode (body diode) that can actively conduct current, or has diodes connected in antiparallel.
- a parasitic diode is a pn junction between the back gate and the source and drain of a MOSFET. The diode can be used as a freewheeling diode to release transient back electromotive force when the transistor is off.
- Each transistor corresponds to an example of a "switching element" in the present disclosure.
- the transistor 11 has a diode 11D between its drain and source.
- Transistor 12 has a diode 12D between its drain and source.
- the drain of the transistor 11 is electrically connected to the first input terminal 1a of the motor control device 101.
- the first input terminal 1a is electrically connected to the high potential side end of the DC power supply 2.
- the source of the transistor 11 is electrically connected to the drain of the transistor 12.
- a source of the transistor 12 is electrically connected to the second input terminal 1b of the motor control device 101.
- the second input terminal 1b is electrically connected to the low potential side end of the DC power supply 2.
- the source of the transistor 11 and the drain of the transistor 12 are electrically connected to the first output terminal 1c of the motor control device 101.
- the first output terminal 1c is electrically connected to the first phase terminal 7a of the motor 7.
- the first phase terminal 7a of the motor 7 is a U-phase terminal.
- the second arm 10V includes a high-side transistor 13 and a low-side transistor 14.
- the transistor 13 has a diode 13D between its drain and source.
- the transistor 14 has a diode 14D between its drain and source.
- the drain of the transistor 13 is electrically connected to the first input terminal 1a.
- the source of transistor 13 is electrically connected to the drain of transistor 14.
- a source of the transistor 14 is electrically connected to the second input terminal 1b.
- the source of the transistor 13 and the drain of the transistor 14 are electrically connected to the second output terminal 1d of the motor control device 101.
- the second output terminal 1d is electrically connected to the second phase terminal 7b of the motor 7.
- the second phase terminal 7b of the motor 7 is a V-phase terminal.
- the third arm 10W includes a high-side transistor 15 and a low-side transistor 16.
- the transistor 15 has a diode 15D between its drain and source.
- Transistor 16 has a diode 16D between its drain and source.
- the drain of the transistor 15 is electrically connected to the first input terminal 1a.
- the source of transistor 15 is electrically connected to the drain of transistor 16.
- a source of the transistor 16 is electrically connected to the second input terminal 1b.
- the source of the transistor 15 and the drain of the transistor 16 are electrically connected to the third output terminal 1e of the motor control device 101.
- the third output terminal 1e is electrically connected to the third phase terminal 7c of the motor 7.
- the third phase terminal 7c of the motor 7 is a W-phase terminal.
- the voltage sensor 3 outputs a signal S1 representing the voltage Vin to the control circuit 102.
- the current sensor 4 is electrically connected between the first output terminal 1c and the first phase terminal 7a.
- the current sensor 4 outputs a signal S2 representing the U-phase current output from the first output terminal 1c to the first phase terminal 7a to the control circuit 102.
- the current sensor 5 is electrically connected between the second output terminal 1d and the second phase terminal 7b.
- the current sensor 5 outputs a signal S3 representing the V-phase current output from the second output terminal 1d to the second phase terminal 7b to the control circuit 102.
- the current sensor 6 is electrically connected between the third output terminal 1e and the third phase terminal 7c.
- the current sensor 6 outputs a signal S4 representing the W-phase current output from the third output terminal 1e to the third phase terminal 7c to the control circuit 102.
- the motor 7 includes a first phase winding 7U, a second phase winding 7V, and a third phase winding 7W.
- Motor 7 is a three-phase motor including three windings.
- the first phase winding 7U is a U-phase winding.
- the second phase winding 7V is a V-phase winding.
- the third phase winding 7W is a W-phase winding.
- the first phase winding 7U includes an inductance component 7Ua and a resistance component 7Ub.
- the second phase winding 7V includes an inductance component 7Va and a resistance component 7Vb.
- Third phase winding 7W includes an inductance component 7Wa and a resistance component 7Wb.
- One end of the first phase winding 7U is electrically connected to the first phase terminal 7a.
- the other end of the first phase winding 7U is electrically connected to the neutral point 7d of the motor 7.
- One end of the second phase winding 7V is electrically connected to the second phase terminal 7b.
- the other end of the second phase winding 7V is electrically connected to the neutral point 7d of the motor 7.
- One end of the third phase winding 7W is electrically connected to the third phase terminal 7c.
- the other end of the third phase winding 7W is electrically connected to the neutral point 7d of the motor 7.
- the position sensor 8 outputs a signal S5 representing the rotational position of the rotor (not shown) of the motor 7 to the control circuit 102.
- the position sensor 8 is exemplified by a rotary encoder, the present disclosure is not limited thereto.
- the control circuit 102 outputs a drive pulse P101 to the inverter 10 based on the signals S1 to S5.
- the control circuit 102 performs 120° rectangular wave control and then performs sine wave control in order to quickly generate large torque.
- the cause of the vibration and sound is torque ripple when switching the energizing phase. I understand. It has been found that the cause of torque ripple is the rate of reduction (consumption) of the return current that occurs when switching between energized phases.
- FIG. 2 is a diagram showing the circuit simulation results of a comparative example. Specifically, FIG. 2 is a diagram showing a circuit simulation result of a comparative example when the motor 7 is started.
- a waveform 211 represents a U-phase current
- a waveform 212 represents a V-phase current
- a waveform 213 represents a W-phase current
- Waveform 214 represents the torque of motor 7.
- the control circuit 102 performs 120° square wave control from timing t 100 when the motor 7 is started until timing t 104 when the cumulative rotation angle of the rotor of the motor 7 reaches a predetermined angle (for example, 540°). After timing t104 , sine wave control is performed.
- Timing t101 is the timing when the rotation angle of the rotor of the motor 7 reaches 60 degrees.
- Timing t 102 is the timing when the rotation angle of the rotor of the motor 7 after timing t 101 reaches 60° (total rotation angle is 120°).
- Timing t 103 is the timing when the rotation angle of the rotor of the motor 7 after timing t 102 reaches 60° (total rotation angle is 180°).
- the control circuit 102 turns on the high-side transistor 11 of the first arm 10U of the inverter 10 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. . Furthermore, the control circuit 102 turns off the high-side and low-side transistors 13 and 14 of the second arm 10V of the inverter 10. Further, the control circuit 102 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- a positive U-phase current flows, as shown by a waveform 211, and a negative W-phase current flows, as shown by a waveform 213.
- the control circuit 102 operates based on the voltage Vin so that the absolute values of the positive U-phase current and the negative W-phase current become predetermined current values (for example, rated current value, allowable maximum current value, etc.). Controls the inverter 10.
- turning on a transistor includes turning it on continuously and turning it on discretely (for example, by PWM).
- the control circuit 102 turns off the high-side and low-side transistors 11 and 12 of the first arm 10U of the inverter 10 during a period 222 from timing t 101 to timing t 102 . Further, the control circuit 102 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the control circuit 102 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- a positive V-phase current flows, as shown by a waveform 212, and a negative W-phase current flows, as shown by a waveform 213.
- the control circuit 102 controls the inverter 10 based on the voltage Vin so that the absolute values of the positive V-phase current and the negative W-phase current become predetermined current values.
- the low side diode 12D of the first arm 10U of the inverter 10 ⁇ the first phase winding 7U of the motor 7 ⁇ the third phase winding 7W of the motor 7 ⁇ the low side transistor 16 of the third arm 10W of the inverter 10 ⁇ the inverter A return current flows through the path of the low-side diode 12D of the first arm 10U.
- the freewheeling current is consumed by the diode 12D of the first arm 10U of the inverter 10 and decreases.
- the control circuit 102 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the control circuit 102 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Furthermore, the control circuit 102 turns off the high-side and low-side transistors 15 and 16 of the third arm 10W of the inverter 10.
- a positive V-phase current flows, as shown by a waveform 212, and a negative U-phase current flows, as shown by a waveform 211.
- the control circuit 102 controls the inverter 10 based on the voltage Vin so that the absolute values of the positive V-phase current and the negative U-phase current become predetermined current values.
- the freewheeling current is consumed by the high-side diode 15D of the third arm 10W of the inverter 10 and decreases.
- the torque ripple represented by the arrow 231 was 30 Nm (Newton meters). However, this value is a result of circuit simulation, and the present disclosure is not limited thereto.
- FIG. 3 is a diagram showing the configuration of the motor control device of the embodiment.
- the motor control device 1 receives the voltage Vin from the DC power supply 2 and operates the motor 7 .
- the motor control device 1 includes an inverter 10 and a control circuit 20.
- the control circuit 20 includes a voltage detection section 21, a position detection section 22, a current detection section 23, and an inverter drive control section 24.
- the voltage detection unit 21 receives the signal S1 from the voltage sensor 3 and outputs it to the inverter drive control unit 24.
- the position detection unit 22 receives the signal S5 from the position sensor 8 and outputs it to the inverter drive control unit 24.
- the current detection unit 23 receives signals S2, S3, and S4 from the current sensors 4, 5, and 6, and outputs them to the inverter drive control unit 24.
- the inverter drive control section 24 outputs the drive pulse P1 to the inverter 10 based on the signals S1 to S5.
- the inverter drive control unit 24 performs 120° rectangular wave control and then performs sine wave control in order to quickly generate large torque when the EV is stopped or moved forward from reverse.
- FIG. 4 is a diagram showing the circuit simulation results of the embodiment. Specifically, FIG. 4 is a diagram showing the circuit simulation results of the embodiment when the motor 7 is started.
- waveform 111 represents the U-phase current
- waveform 112 represents the V-phase current
- waveform 113 represents the W-phase current
- waveform 114 represents the torque of motor 7.
- the inverter drive control unit 24 generates a 120° rectangular waveform from timing t0 when the motor 7 starts until timing t4 when the cumulative rotation angle of the rotor of the motor 7 reaches a predetermined angle (for example, 540°). After timing t4 , sine wave control is performed.
- Timing t1 is the timing when the rotation angle of the rotor of the motor 7 reaches 60 degrees.
- Timing t2 is the timing at which the rotation angle of the rotor of the motor 7 after timing t1 reaches 60 degrees (total rotation angle is 120 degrees).
- Timing t 3 is the timing when the rotation angle of the rotor of the motor 7 after timing t 2 reaches 60° (total rotation angle is 180°).
- the inverter drive control unit 24 turns on the high-side transistor 11 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side and low-side transistors 13 and 14 of the second arm 10V of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- a positive U-phase current flows, and as shown by a waveform 113, a negative W-phase current flows.
- the inverter drive control unit 24 controls the absolute values of the positive U-phase current and the negative W-phase current to be predetermined current values (e.g., rated current value, allowable maximum current value, etc.) based on the voltage Vin. Then, the inverter 10 is controlled.
- predetermined current values e.g., rated current value, allowable maximum current value, etc.
- turning on a transistor includes turning it on continuously and turning it on discretely (for example, by PWM).
- the inverter drive control unit 24 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10 during a period 122 from timing t 1 to timing t 2 . Further, the inverter drive control unit 24 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- a positive V-phase current flows, as shown by a waveform 112
- a negative W-phase current flows, as shown by a waveform 113.
- the inverter drive control unit 24 controls the inverter 10 based on the voltage Vin so that the absolute values of the positive V-phase current and the negative W-phase current become predetermined current values.
- the low side transistor 12 of the first arm 10U of the inverter 10 ⁇ the first phase winding 7U of the motor 7 ⁇ the third phase winding 7W of the motor 7 ⁇ the low side transistor 16 of the third arm 10W of the inverter 10 ⁇ the inverter A return current flows through the path of the low-side transistor 12 of the first arm 10U.
- the freewheeling current is consumed by the on-resistance of the low-side transistor 12 of the first arm 10U of the inverter 10 and decreases.
- the power consumption of the on-resistance of the transistor 12 is smaller than the power consumption of the diode 12D. Therefore, when comparing the waveform 211 (comparative example) of the period 222 in FIG. 2 with the waveform 111 (embodiment) of the period 122 in FIG. (waveform 211).
- the motor control device 1 can suppress torque ripple.
- slow decreasing rate of the return current means, in other words, that the decreasing rate of the electromagnetic energy of the first phase winding 7U of the motor 7 is slow.
- the inverter drive control unit 24 controls the connection between one end of the first phase winding 7U of the motor 7 (the end connected to the first phase terminal 7a) and the other end (the end connected to the neutral point 7d).
- the low-side transistor 12 of the first arm 10U of the inverter 10 is controlled by PWM (Pulse Width Modulation) so that the voltage becomes zero.
- the fact that current no longer flows through the first phase winding 7U of the motor 7 means that the electromagnetic energy of the first phase winding 7U of the motor 7 decreases at a slow rate.
- the inverter drive control unit 24 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the inverter drive control unit 24 turns on the high-side transistor 15 and turns off the low-side transistor 16 of the third arm 10W of the inverter 10.
- a positive V-phase current flows, as shown by a waveform 112, and a negative U-phase current flows, as shown by a waveform 111.
- the inverter drive control unit 24 controls the inverter 10 based on the voltage Vin so that the absolute values of the positive V-phase current and the negative U-phase current become predetermined current values.
- the freewheeling current is consumed by the on-resistance of the high-side transistor 15 of the third arm 10W of the inverter 10 and decreases.
- the power consumption of the on-resistance of the transistor 15 is smaller than the power consumption of the diode 15D. Therefore, when comparing the waveform 213 (comparative example) of the period 223 in FIG. 2 and the waveform 113 (embodiment) of the period 123 in FIG. (waveform 213).
- slow decreasing rate of the return current means, in other words, that the decreasing rate of the electromagnetic energy of the third phase winding 7W of the motor 7 is slow.
- the inverter drive control unit 24 controls the connection between one end of the third phase winding 7W of the motor 7 (the end connected to the third phase terminal 7c) and the other end (the end connected to the neutral point 7d).
- the high-side transistor 15 of the third arm 10W of the inverter 10 is controlled by PWM so that the voltage becomes zero.
- the fact that current no longer flows through the third phase winding 7W of the motor 7 means that the rate of decrease in electromagnetic energy in the third phase winding 7W of the motor 7 is slow.
- FIG. 5 is a flowchart of the motor control device according to the embodiment. Specifically, FIG. 5 is a flowchart of the 120° rectangular wave control of the motor control device 1.
- the motor control device 1 ends the process ( control) and shifts to sine wave control.
- step S100 the inverter drive control unit 24 turns on the high-side transistor 11 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side and low-side transistors 13 and 14 of the second arm 10V of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S102 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S102), the process proceeds to step S102. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated by 60 degrees (Yes in step S102), the process proceeds to step S104.
- step S104 the inverter drive control unit 24 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S106 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60° (120° rotation, 480° rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S106), the process proceeds to step S106. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated 60 degrees (Yes in step S106), the process proceeds to step S108.
- step S108 the inverter drive control unit 24 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the inverter drive control unit 24 turns on the high-side transistor 15 and turns off the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S110 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60° (180° rotation, 540° rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S110), the process proceeds to step S110. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated 60 degrees (Yes in step S110), the process proceeds to step S112.
- step S112 the inverter drive control unit 24 turns off the high-side transistor 11 and turns on the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side transistor 13 of the second arm 10V of the inverter 10 and turns on the low-side transistor 14. Further, the inverter drive control unit 24 turns on the high-side transistor 15 and turns off the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S114 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60 degrees (240 degrees rotation, 600 degrees rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S114), the process proceeds to step S114. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated by 60 degrees (Yes in step S114), the process proceeds to step S116.
- step S116 the inverter drive control unit 24 turns on the high-side transistor 11 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side transistor 13 of the second arm 10V of the inverter 10 and turns on the low-side transistor 14. Further, the inverter drive control unit 24 turns on the high-side transistor 15 and turns off the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S118 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60° (300° rotation, 660° rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S118), the process proceeds to step S118. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated 60 degrees (Yes in step S118), the process proceeds to step S120.
- step S120 the inverter drive control unit 24 turns on the high-side transistor 11 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns off the high-side transistor 13 of the second arm 10V of the inverter 10 and turns on the low-side transistor 14. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S122 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60° (360° rotation, 720° rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating 60 degrees (No in step S122), the process proceeds to step S122. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated by 60 degrees (Yes in step S122), the process proceeds to step S124.
- step S124 the inverter drive control unit 24 turns on the high-side transistor 11 and turns off the low-side transistor 12 of the first arm 10U of the inverter 10. Further, the inverter drive control unit 24 turns on the high-side transistor 13 of the second arm 10V of the inverter 10 and turns off the low-side transistor 14. Further, the inverter drive control unit 24 turns off the high-side transistor 15 and turns on the low-side transistor 16 of the third arm 10W of the inverter 10.
- step S126 the inverter drive control unit 24 determines whether the rotor of the motor 7 has rotated 60 degrees (420 degrees rotation, 780 degrees rotation, etc. in total). If the inverter drive control unit 24 determines that the rotor of the motor 7 is not rotating by 60 degrees (No in step S126), the process proceeds to step S126. That is, the inverter drive control unit 24 waits until the rotor of the motor 7 rotates 60 degrees. If the inverter drive control unit 24 determines that the rotor of the motor 7 has rotated 60 degrees (Yes in step S126), the process proceeds to step S104.
- the motor control device 1 can suppress torque ripple compared to the motor control device 101.
- the maximum value of the torque ripple caused by the motor control device 101 was 30 Nm, but the maximum value of the torque ripple caused by the motor control device 1 was 7 Nm.
- the motor control device 1 can suppress torque ripple to about 1/4 compared to the motor control device 101.
- this value is a result of circuit simulation, and the present disclosure is not limited thereto.
- the motor control device 1 can suppress vibrations and sounds generated during the period of 120° square wave control by suppressing torque ripple.
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- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Inverter Devices (AREA)
Abstract
Description
3相モータの第1相端子、第2相端子及び第3相端子に夫々電気的に接続される第1アーム、第2アーム及び第3アームを含む、インバータ回路と、
第1期間では、前記第1アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、前記第2アームのハイサイド及びローサイドのスイッチング素子をオフに制御し、前記第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、
前記第1期間に引き続く第2期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御する、制御回路と、
を含む、
ことを特徴とする。
前記制御回路は、
前記第2期間では、前記3相モータの第1相端子と前記3相モータの中性点との間の電圧がゼロになるように、前記第1アームのローサイドのスイッチング素子をパルス幅変調制御する、
ことを特徴とする。
前記制御回路は、
前記第2期間に引き続く第3期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御する、
ことを特徴とする。
前記制御回路は、
前記第3期間では、前記3相モータの第3相端子と前記3相モータの中性点との間の電圧がゼロになるように、前記第3アームのハイサイドのスイッチング素子をパルス幅変調制御する、
ことを特徴とする。
第1期間では、3相モータの第1相端子に電気的に接続された第1アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、前記3相モータの第2相端子に電気的に接続された第2アームのハイサイド及びローサイドのスイッチング素子をオフに制御し、前記3相モータの第3相端子に電気的に接続された第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、
前記第1期間に引き続く第2期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御する、
ことを特徴とする。
実施形態及び比較例では、モータ制御装置及びモータを備えた物として、EVを例にとって説明するが、本開示はこれに限定されない。本開示は、モータ制御装置及びモータを備えた各種の物に適用可能である。
図1は、比較例のモータ制御装置の構成を示す図である。モータ制御装置101は、直流電源2から電圧Vinの供給を受けて、モータ7を動作させる。
実施形態の構成要素のうち、比較例の構成要素と同一の構成要素については、同一の符号を付して説明を省略する。
図5は、実施形態のモータ制御装置のフローチャートである。詳しくは、図5は、モータ制御装置1の120°矩形波制御のフローチャートである。
モータ制御装置1は、モータ制御装置101と比較して、トルクリップルを抑制することができる。例えば、回路シミュレーションの一結果では、モータ制御装置101によるトルクリップルの最大値が30Nmであったところ、モータ制御装置1によるトルクリップルの最大値は7Nmである。つまり、モータ制御装置1は、モータ制御装置101と比較して、トルクリップルを約1/4に抑制できる。但し、この値は、回路シミュレーションの一結果であり、本開示はこれに限定されない。
2 直流電源
3 電圧センサ
4、5、6 電流センサ
7 モータ
7U 第1相巻線
7V 第2相巻線
7W 第3相巻線
8 位置センサ
10 インバータ
10U 第1アーム
10V 第2アーム
10W 第3アーム
11、12、13、14、15、16 トランジスタ
11D、12D、13D、14D、15D、16D ダイオード
20、102 制御回路
21 電圧検出部
22 位置検出部
23 電流検出部
24 インバータ駆動制御部
Claims (5)
- 3相モータの第1相端子、第2相端子及び第3相端子に夫々電気的に接続される第1アーム、第2アーム及び第3アームを含む、インバータ回路と、
第1期間では、前記第1アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、前記第2アームのハイサイド及びローサイドのスイッチング素子をオフに制御し、前記第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、
前記第1期間に引き続く第2期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御する、制御回路と、
を含む、
ことを特徴とする、モータ制御装置。 - 前記制御回路は、
前記第2期間では、前記3相モータの第1相端子と前記3相モータの中性点との間の電圧がゼロになるように、前記第1アームのローサイドのスイッチング素子をパルス幅変調制御する、
ことを特徴とする、請求項1に記載のモータ制御装置。 - 前記制御回路は、
前記第2期間に引き続く第3期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御する、
ことを特徴とする、請求項1又は2に記載のモータ制御装置。 - 前記制御回路は、
前記第3期間では、前記3相モータの第3相端子と前記3相モータの中性点との間の電圧がゼロになるように、前記第3アームのハイサイドのスイッチング素子をパルス幅変調制御する、
ことを特徴とする、請求項3に記載のモータ制御装置。 - 第1期間では、3相モータの第1相端子に電気的に接続された第1アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、前記3相モータの第2相端子に電気的に接続された第2アームのハイサイド及びローサイドのスイッチング素子をオフに制御し、前記3相モータの第3相端子に電気的に接続された第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、
前記第1期間に引き続く第2期間では、前記第1アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御し、第2アームのハイサイドのスイッチング素子をオンに制御し、ローサイドのスイッチング素子をオフに制御し、第3アームのハイサイドのスイッチング素子をオフに制御し、ローサイドのスイッチング素子をオンに制御する、
ことを特徴とする、モータ制御方法。
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| JP2018113826A (ja) * | 2017-01-13 | 2018-07-19 | ミネベアミツミ株式会社 | モータ駆動制御装置 |
| WO2020066184A1 (ja) * | 2018-09-27 | 2020-04-02 | 日本電産株式会社 | 駆動制御装置、駆動装置およびパワーステアリング装置 |
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| JP2017135949A (ja) * | 2016-01-29 | 2017-08-03 | 株式会社マキタ | 電動作業機 |
| JP2018113826A (ja) * | 2017-01-13 | 2018-07-19 | ミネベアミツミ株式会社 | モータ駆動制御装置 |
| WO2020066184A1 (ja) * | 2018-09-27 | 2020-04-02 | 日本電産株式会社 | 駆動制御装置、駆動装置およびパワーステアリング装置 |
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