ELECTRIC MOTOR CONTROL APPARATUS

摘要

An object is to provide an electric motor control apparatus which can quickly and accurately locate a short-circuit fault point. The electric motor control apparatus includes: current control means for determining respective phase voltage commands according to currents flowing in respective phases of an electric motor and a torque current command; a switching element drive circuit for instructing, based on the respective phase voltage commands, an inverter to perform a switching operation; the inverter for receiving a switching operation signal to drive the electric motor; current detectors disposed in series with the switching elements in the respective phases of the inverter; and short-circuit point locating means for storing a test pattern indicative of a predetermined combination for turning on the switching elements of the inverter, and for locating a short-circuit fault point based on the test pattern and current detection values in the respective phases detected by the current detectors in response to the test pattern.