Motor control device and motor control method

Abstract

Provided is a motor control device capable of appropriately achieving both low loss and low NV in a scene where a plurality of surrounding environments and a plurality of vehicle states overlap. The motor control device is connected to an AC motor and PWM-controls a power converter that performs power conversion from DC power to AC power. The motor control device includes: a plurality of PWM pulse patterns; a pulse pattern determination unit that sets a pulse pattern for performing the PWM control; an evaluation unit that determines a priority of a total loss of the AC motor and the power converter and vibration noise of the AC motor; and a loss/NV calculation unit that calculates a value of the total loss and a value of the vibration noise in torque and rotation speed for each pulse pattern. The evaluation unit determines the priority on the basis of a parameter regarding at least one of a surrounding environment, mode designation by intention of a driver, a remaining battery amount, a driving operation point, and a vehicle state, and the pulse pattern determination unit sets the pulse pattern by using the priority determined by the evaluation unit, the value of the total loss, and the vibration noise.