G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/34 (2006.01) H02K 11/00 (2006.01)
Patent
CA 2174709
An electric rotating machine comprises a rotor body of cylindrical structure and a stator body covering an outer peripheral portion of the rotor body in a non-contact fashion. The stator body includes a stator winding formed with an insulation layer and arranged radially outward of the rotor body with a clearance from the rotor body and a stator core which supports the stator winding. The electrostatic capacity of the stator winding is measured by an electrostatic capacity measuring instrument which comprises a housing having a size allowing the housing to be accommodated in the clearance between the rotor body and the stator winding, a support body detachably secured to the rotor body and adapted to support the housing within the clearance to be movable, and a measuring element mounted to the housing on the side of the housing facing the stator winding and adapted to measure electrostatic capacity of the stator winding, wherein a degree of water penetration into the insulation of the stator winding is determined based on a measurement data from the measuring element.
Hasegawa Hiroshi
Nagano Susumu
Shimada Hideyuki
Takahashi Shinji
Tashiro Kazuo
Kabushiki Kaisha Toshiba
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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