PERMANENT MAGNET TYPE MOTOR

摘要

PURPOSE: A permanent magnet type motor is provided to change counter electromotive force by varying inductance or a turn ratio according to a current operation frequency. CONSTITUTION: A machine unit is comprised of a stator, a rotor, and a winding connection unit(25). An electronic control unit is comprised of a rectifier(1), an inverter(10), and a controller(33). The rectifier receives AC and outputs DC. The controller receives a position signal from a position sensor(31) and controls the speed by sensing the rotation speed or operation frequency of the motor. The controller generates a control signal which controls the rotation of the motor according to the comparison result by comparing the sensed rotation speed with a preset speed and applies the control signal to the inverter.