| 摘要 |
PURPOSE:To raise the flux density of a gap between a rotor and a stator, by providing a submagnetic paths at both ends of the rotor and by providing a non-magnetic substance layer in the clearance between this submagnetic path and a permanent magnet and a rotor core. CONSTITUTION:At both ends of a rotor 1 submagnetic paths 3a and 3b are provided which are extended from a rotor yoke 3. A non-magnetic substance layer is provided in the clearances 22 and 23 between the submagnetic paths 3a and 3b and permanent magnets 4 and 5 and rotor cores 6 and 7 fixed to the permanent magnets 4 and 5 respectively. The flux generated from the permanent magnets 4 and 5 flows along a magnetic path 13. Since the submagnetic paths 3a and 3b are provided, the flux leaked flows through the submagnetic paths 3a and 3b where the flux is prone to flow, so that less flux leakage will be found.
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