MOTOR-DRIVE CONTROLLER

摘要

A motor-drive controller has an inverter supplying an AC power to a motor, a switching angle database outputting a set of phase angles between pulses of an inverter output voltage on the basis of a current flowing to the motor. The inverter is controlled by control signals having a switching pattern on the basis of the set of phase angles, whereby the inverter output voltage has a symmetric pattern for a reduction of harmonics.