MOTOR CONTROL DEVICE, DRIVE DEVICE, AND HYBRID DRIVE DEVICE

摘要

When driving a motor, a primary side DC voltage is boosted to a secondary voltage by a converter (30c) and the voltage is converted into a 3-phase AC by an inverter (19) for supply to the motor (10m). A regeneration power of the motor is supplied to primary DC power sources (18, 21) via an inverse route. A secondary side target voltage which defines the secondary voltage to be applied to the inverter is decided according one of the following three regions: a first region where the motor is driven in a modulation mode for PWM electrical connection to at least two phases and weak field control is not performed; a third region where weak field control is performed in the modulation mode for PWM electric communication to at least two phases with a voltage smaller than a maximum voltage (Vmax) of the converter; and a second region where weak field control is performed in a 1-pulse mode for rectangular-wave electrical communication of all the phases with a voltage smaller than the maximum voltage of the converter. A converter control device (30v) decides the secondary voltage to be the secondary side target voltage.