PERMANENT MAGNET TYPE ROTARY MOTOR, ASSEMBLY METHOD FOR PERMANENT MAGNET TYPE ROTARY MOTOR, DISASSEMBLY METHOD FOR PERMANENT MAGNET TYPE ROTARY MOTOR, AND PERMANENT MAGNET TYPE ROTARY MOTOR DRIVE SYSTEM

摘要

The present invention provides a permanent-magnet-type rotating electrical machine capable of realizing variable-speed operation in a wide range from low speed to high speed at high output and improving, in a wide operating range, efficiency, reliability, and productivity. The rotating electrical machine employs a first permanent magnet 3 whose product of coercive force and magnetizing direction thickness is small and a second permanent magnet 4 whose product of coercive force and magnetizing direction thickness is large, to form a magnetic pole. The product of coercive force and magnetizing direction thickness of the first permanent magnet is equal to or larger than the product of magnetic field strength and magnetizing direction thickness of the second permanent magnet at a no-load operating point. At the magnetic pole, a magnetic field created by a current of an armature coil magnetizes the first permanent magnet, to irreversibly change a flux amount of the first permanent magnet.