| 摘要 |
PROBLEM TO BE SOLVED: To obtain a stator coil of a rotating electric machine that can effectively suppress partial discharge and is enhanced in reliability. SOLUTION: An anti-ground main insulating layer 11 is formed of first and second insulating layers 12, 13. For example, the first insulating layer 12 is formed by winding a bond-treated mica tape that is folded in half to a wire bundle 5 by one winding turn, and a semi-conductive layer 15 is formed by winding a semi-conductive tape that is folded in half to the first insulating layer 12 by one winding turn. The second insulating layer 13 is formed by winding the bond-treated mica tape that is folded in half to the semi-conductive layer by nine winding turns, and low-resistance and high-resistance corona shield layers 16, 17 are formed at the external periphery of the second insulating layer. The number of winding turns of the bond-treated mica tape is reduced to a minimum, to shorten a distance between the semi-conductive layer and the wire bundle, and field intensity between the semi-conductive layer and the wire bundle is made not higher than a prescribed value. By this, partial discharge at the anti-ground main insulating layer 11 can effectively be suppressed. COPYRIGHT: (C)2007,JPO&INPIT
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