MOTOR CONTROL APPARATUS

摘要

A motor control apparatus includes a secondary-magnetic-flux-command calculating unit including a minimum-current-secondary-magnetic-flux-command calculating unit that calculates a secondary magnetic flux command for minimizing a current root-mean-square value due to a torque current and an excitation current and a PWM-signal generating unit that generates a torque current command for outputting a desired torque command and an excitation current command for outputting the secondary magnetic flux command, performs vector control such that a q-axis current, which is a detection value of the torque current, and a d-axis current, which is a detection value of the excitation current, respectively coincide with the torque current command and the excitation current command, and generates control signals for turning on and off a switching element in an inverter.

主权项

1. A motor control apparatus that divides an electric current flowing into and out of a motor driven by an inverter into a torque current and an excitation current and individually controls the torque current and the excitation current on the basis of a torque current command obtained from a torque command and an excitation current command, the motor control apparatus comprising:
a secondary-magnetic-flux-command calculating unit including a first calculating unit that calculates a minimum current secondary magnetic flux command from the torque command under a condition that a current root-mean-square value due to the torque current command and the excitation current command are minimized; and a PWM-signal generating unit that generates the torque current command for and the excitation current command from the torque command and the minimum current secondary magnetic flux command, performs vector control such that a detection value of the torque current and a detection value of the excitation current respectively coincide with the torque current command and the excitation current command, and generates a control signal for turning on and off a switching element included in the inverter.