DESIGN OF HIGH SPEED INTERIOR PERMANENT MAGNET TYPE MOTOR FOR TURBO-MACHINERY

Abstract

High speed Interior Permanent Magnet (IPM) motor is proposed. It is intended to apply to the turbo-machinery which is supported by magnetic bearings. Such a system usually requests a big UPS to support the rotor when the power supply stops suddenly. Just after the power supply stope, the motor generates electric power from the rotational energy. The regenerated energy is used to operate the magnetic bearing until the rotor speed slows down. The rotor is touch down to the emergency bearing (ball bearing). This paper is considering two pole IPM motor as a generator for such a sudden power stop. The rotating energy is regenerate the electric power to support the magnetic bearing until the rotor speed slow down.