Motor control device and drive system equipped with same

Abstract

A motor control device controls an AC synchronous motor through sensorless control without using a rotor position sensor. The motor control device includes: a first position estimator that estimates the position of the rotor of the AC synchronous motor on a fixed coordinate system by a first estimation method; a second position estimator that estimates the position of the rotor of the AC synchronous motor on a fixed coordinate system by a second estimation method different from the first estimation method; and drive control means that drives the AC synchronous motor based on the estimation results of the first position estimator and the second position estimator.

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