Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1996-04-19
1997-10-28
Nguyen, Vinh P.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324772, 324689, 340648, G01R 3134
Patent
active
056821026
ABSTRACT:
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.
REFERENCES:
patent: 5032826 (1991-07-01), Miller
patent: 5055775 (1991-10-01), Scherz
patent: 5252927 (1993-10-01), Bruhlmeier
patent: 5262717 (1993-11-01), Bolegoh
patent: 5365166 (1994-11-01), Dailey
patent: 5557216 (1996-09-01), Dailey
Lloyd R. Brown, et al., "Montana Power Company's experience With Leeks In Water-Cooled Stator Windings", The American Society of Mechanical Engineers 93-JPGC-PWR-26, Oct. 17-22, 1993, (pp. 1-6).
Bruce Faulk, et al., "Diagnosing and Repairing Water Leaks in Stator Windings", Electric Power Research Institute, Jun. 5-6, 1995, (pp. 1-13).
Hasegawa Hiroshi
Nagano Susumu
Shimada Hideyuki
Takahashi Shinji
Tashiro Kazuo
Kabushiki Kaisha Toshiba
Nguyen Vinh P.
Solis Jose M.
LandOfFree
Electrostatic capacity measuring instrument for stator winding o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrostatic capacity measuring instrument for stator winding o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic capacity measuring instrument for stator winding o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028421