| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure where a rotor core and a stator core are made contact each other with bearing balls, which utilizes the fact that a method of direct contacting, with no air gap, is most effective to maintain magnetic flux density with no reduction. SOLUTION: A required number of bearing balls are inserted for well balance in the gap between an iron core and an N/S core. The axes of bearing balls are connected/fixed with a non-magnetic body, or the axes of bearing balls are fixed to a stator core or a rotor core for point or line contacting, resulting in smooth rotational movement. COPYRIGHT: (C)2005,JPO&NCIPI
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