| 摘要 |
PROBLEM TO BE SOLVED: To prevent magnetic field flux from being short-circuited and reduce leakage flux. SOLUTION: A rotor core 7 of an outer-periphery-side rotor includes an inner-periphery-side yoke member containing a soft magnetic material 7a on either one side and an outer-periphery-side yoke member containing a non-magnetic substance 7b on the other side. The inner-periphery-side yoke member has an annular shape and a protrusion portion at the outer-periphery portion and the outer-periphery-side yoke member has an annular shape and a fitting recessed portion for fitting onto the protrusion portion at the inner-periphery portion. While the protrusion portion is fitted into the fitting recessed portion, a joint body is formed by sinter diffusion connection. Further, by removing the inner-periphery portion and the outer-periphery so as to alternately arrange the soft magnetic material 7a and the non-magnetic substance 7b in the peripheral direction, the rotor core 7 of the outer-periphery-side rotor is formed. COPYRIGHT: (C)2009,JPO&INPIT
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