Motor control device and motor control method
AssigneeHitachi Astemo, Ltd.
InventorsYasuaki Sato, Keisuke Suzuki, Katsuhiro Hoshino, Hideki Sekiguchi
Life of this patent
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Abstract
A motor control device includes: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular.
Claims9
A motor control device comprising:
- an inverter that supplies an alternating current to a motor mounted on a vehicle;
- a current detection unit that detects the alternating current;
- a position detection unit that detects a rotor phase angle of the motor;
- and
- an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit,
- wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular, and
- wherein the inverter control unit determines the timing at which the vibration of the vehicle is generated, based on a rotor phase angular velocity of the motor.
A motor control method used by a motor control device including:
- an inverter that supplies an alternating current to a motor mounted on a vehicle;
- a current detection unit that detects the alternating current;
- a position detection unit that detects a rotor phase angle of the motor;
- and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, the motor control method comprising:
- determining a timing at which vibration of the vehicle is generated, based on a rotor phase angular velocity of the motor, and
- in response to the timing at which the vibration of the vehicle is generated, changing a current phase angle of the motor, and making a cycle of a waveform of a resultant current of the alternating current irregular.
Dependencies are inferred from the claim text.