The permanent magnet motor

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PROBLEM TO BE SOLVED : To obtain an adaptive motor by widening the selection width of magnetic flux density and cost, in a permanent magnet motor. SOLUTION : In an inner rotor type of permanent magnet motor, when embedding permanent magnets 11 and 12 which are singular for each pole in matching with the number of poles, so as to make a rotor core 10, the permanent magnets 11 of the same material (rare-earth magnet) are embedded in the magnetic poles of the same polarity, and moreover the permanent magnets 12 of different material(ferrite magnet) are embedded singular for each pole in the magnetic poles of different polarities. The permanent magnets 11 and 12 are rectangular in cross section and are arranged as S poles along the periphery of the core, and holes (flux barriers) 13 and 14 are made at both ends of the permanent magnets 11 and 12.