APPARATUS FOR CONTROLLING ELECTRIC MOTOR DIPRESSED MAGNETIC FLUX OUTPUT

摘要

PURPOSE: A motor control device of motor is provided to control the divergence of a current by using a torque component instruction current value instead of using a flux-weakening output value during a specific period. CONSTITUTION: A velocity controller(130) outputs a first torque component instruction current. A magnetic flux controller(140) outputs a magnetic flux component instruction current by using the actual velocity of an electric motor and the first torque component instruction current. A denotation determining unit(150) decides the denotation of the first torque component instruction current. A magnetic flux output power limitation unit(160) outputs the first or the second torque component instruction current based on the comparison result between the actual velocity of the electric motor and a reference velocity. A current controller(170) outputs a phase voltage instruction signal by using the first or the second torque component instruction current and the magnetic flux component instruction current. A PWM(Pulse Width Modulation) inverter(180) changes the phase voltage instruction signal to a three phase PWM inverter signal.