Kenyon & Kenyon LLP
Motor controller
Provided is a technology capable of ensuring drivability of an electric vehicle while preventing thermal destruction of its parts and deterioration of a battery, caused by an LC resonance. The present specification discloses a motor controller for an electric vehicle having a battery, a converter circuit, an inverter circuit, a smoothing capacitor, and a motor, the motor controller configured to control a drive of the motor by controlling an operation of the inverter circuit. In this motor controller, an operating region of the motor that causes a resonance of an LC circuit configured by a reactor of the converter circuit and the smoothing capacitor is set as a resonance region. In this motor controller, execution of square-wave control on the motor is permitted only over a predetermined time period, when the converter circuit is not boosting the DC power and an operating point of the motor is included in the resonance region.
Toyota Jidosha Kabushiki Kaisha
Y B
Y02T B60L
additional inventional
Takayuki
Asami