MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD

摘要

A motor control apparatus controls a motor system including a motor and an inverter that outputs electric power to the motor. The motor control apparatus includes an electronic control unit. The electronic control unit is configured to set a q-axis current command value in response to a torque command value, and execute system loss reduction control for controlling a d-axis current command value such that a system loss (Ps) that is the sum of a copper loss (Pc), an iron loss (Pi) and an inverter loss (Pinv) is smaller than the system loss (Ps) at the time when a motor loss (Pm) that is the sum of the copper loss (Pc) and the iron loss (Pi) is minimum. The copper loss (Pc), the iron loss (Pi) and the inverter loss (Pinv) change as a current phase (²) of a current vector changes in a q-d plane.