PERMANENT MAGNET TYPE DYNAMO ELECTRIC MACHINE, METHOD FOR ASSEMBLING PERMANENT MAGNET TYPE DYNAMO ELECTRIC MACHINE, METHOD FOR DISASSEMBLING PERMANENT MAGNET TYPE DYNAMO ELECTRIC MACHINE AND PERMANENT MAGNET 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. A narrow magnetic path 11 is formed in a rotor core 2 of a rotor 1 at an inter-pole yoke that magnetically connects adjacent pole core portions 7 to each other, so that the narrow magnetic path is magnetically saturated with flux of a magnetic field created by a predetermined magnetizing current passed to an armature coil 21. Each of first permanent magnets 3 at each of the pole core portions 7 is magnetized with a magnetic field created by a magnetizing current passed to the armature coil 21, to irreversibly change the flux amount of the first permanent magnet.