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公开(公告)号：US3679925A
公开(公告)日：1972-07-25
申请号：US3679925D
申请日：1971-02-02
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FORT EMIL M
CPC classification number: H02K3/40
Abstract: In electrical apparatus in which high voltages may occur between two closely spaced conductive members, at least one of which is insulated by a coating of insulation, and in which the electric field gradient parallel to the surface of this insulated conductor in some area is sufficient to cause surface corona, an additional member of electrical insulation is introduced to this area to form a new insulation surface with a lower field gradient, thus suppressing surface corona. To suppress end corona between the end portion of a stator coil and the stator core of a dynamoelectric machine, a collar encircling the coil at the face of the core is provided in accordance with this invention. The invention facilitates the production of high voltage machines in which the coils are insulated by post impregnation (i.e., after winding on the core).
Abstract translation: 在电气设备中，其中可能在两个紧密隔开的导电构件之间发生高电压，其中至少一个通过绝缘涂层绝缘，并且其中在某些区域平行于该绝缘导体的表面的电场梯度足以 引起表面电晕，将另外的电绝缘构件引入该区域以形成具有较低场梯度的新绝缘表面，从而抑制表面电晕。 为了抑制定子线圈的端部与电动机的定子芯之间的端部电晕，根据本发明提供了在芯部的表面处环绕线圈的轴环。 本发明有利于生产高压机器，其中线圈通过后浸渍（即在卷绕在芯上）之后被绝缘。
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公开(公告)号：CA1040696A
公开(公告)日：1978-10-17
申请号：CA236392
申请日：1975-09-25
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FORT EMIL M
Abstract: An arrangement for reducing voltage stress and corona discharge in high voltage insulating material utilizes thin conductive layers embedded within the insulation. Each conductive layer serves as an equi-potential surface which grades the voltage drop across the insulating material, thereby reducing the chance of corona discharge. For insulation which encloses a conductor having a curved edge portion lowest electrical stress in the insulation is obtained when the stress at the curved edge portion of the conductor is equal to the stress at the corresponding curved outside surface of the conducting layer. This condition is satisfied in the present invention by making the spacing distance of the conducting layer from the conductor in the curved region equal to the geometric average of the radius of the curved conductor edge and the radial thickness of the insulation.
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公开(公告)号：CA1024575A
公开(公告)日：1978-01-17
申请号：CA235205
申请日：1975-09-11
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： SCHNEIDER MARK H , FORT EMIL M , SIMMONDS LEONARD B , KULTZOW ROBERT J
Abstract: 1516998 Stator cooling and winding insulation WESTINGHOUSE ELECTRIC CORP 15 Sept 1975 [25 Sept 1974] 37806/75 Heading H2A The stator winding of a dynamoelectric machine has a closed coolant system comprising a pump (28), Fig. 1 (not shown), a cooler (30), inlet and outlet manifolds (24), (25), hollow strands in the conductors 16 of the winding and headers 36 one at each end of each conductor 16, the epoxy resin impregnated mica tape insulation 46 on each conductor 16 terminating short of the headers 36 thereon, each conductor 16 in the regions adjacent headers 36 having its strands supported in relation to each other by epoxy resin (45), Fig. 4 (not shown), filling space between the strands (20), and the parts of each conductor 16 between its header 36 and insulation 46 each having a respective rigid electrically insulating support member 47 formed by layers of epoxy resin impregnated, non-woven, glass fibre material (48), Fig. 3 (not shown), each layer (48) forming a full sleeve-like covering of the conductor 16, layers (48) being interleaved with the mica tape layers (49), Fig. 3. A turbine driven generator, Fig. 1, has a gas-tight casing (13) filled with a coolant gas, e.g. hydrogen, to cool a hollow cylindrical stator (10) and a rotor (18). Each support 47 is interleaved with the corresponding insulation 46 by winding them alternately onto conductor 16 to form a splice 50, the support 47 being wound to gradually extend onto a tapered part of the header 36 and the insulation 46 then being impregnated with epoxy resin which is subsequently cured.
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公开(公告)号：CA1297154C
公开(公告)日：1992-03-10
申请号：CA607226
申请日：1989-08-01
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FORT EMIL M , SIMMONDS LEONARD B
IPC: H02K11/00 , G01R31/02 , H01R13/193 , G01R31/06 , G01R1/06
Abstract: PATENT 4,146 12 PD-9054 A plurality of connector members are provided, each of which is shaped to fit between two adjacent strands in a column of strands on a stator winding (i.e., by manual insertion). Each connector member has a first side provided with an electrically conductive material and a second side provided with an electrically insulating material. An electrically conductive lead is electrically connected to the electrically conductive material on an associated connector member. In this manner, a plurality of electrically conductive leads are connected to an associated plurality of connector members. A plug or receptacle is provided at the opposite end of the electrically conductive leads with respect to the end connected to the connector members. Securing means are provided for pressing the strands against the connector members interposed therebetween in order to insure a conductive connection between each strand and the conductive material of a connector member. The securing means can be provided in the form of a tubular member which is adapted to slide over the column of strands and interposed connector members. A wedge-shaped member can be inserted between an inside surface of the tubular member and one end of the column of strands in order to secure the tubular member to the column of strands and to press the column of strands and interposed contact members together.
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公开(公告)号：DE2808018A1
公开(公告)日：1978-08-31
申请号：DE2808018
申请日：1978-02-24
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FORT EMIL M
Abstract: Apparatus for sensing overheated electrical insulation through the detection of thermoparticulates in a dynamoelectric machine's cooling gas system is disclosed. The cooling gas as it circulates will entrain thermoparticulates produced in the system when there is overheating. This gaseous carrier is then withdrawn and conducted to an ionization chamber where it is ionized. Downstream from the ionization chamber there is placed a first ion collector for collecting ions with relatively small radii. A second ion collector which is biased for collecting ions with relatively large radii is also placed downstream from the ionization chamber. By comparison of ion current from the first ion collector with ion current from the second ion collector it is possible to detect the presence of thermoparticulates in the cooling gas relatively independent of gas pressure, flow rate through the monitor, and effectiveness of the radiation source.
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Patent Agency Ranking
公开(公告)号：CA1319387C
公开(公告)日：1993-06-22
申请号：CA598763
申请日：1989-05-04
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： ROWE CHARLES M , PONCE HECTOR O , SIMMONDS LEONARD B , FORT EMIL M
Abstract: 53,925 An improved method and apparatus for preventing electrical shorts between sets of stator coil headers and accompanying connections is disclosed in which a reinforced, non-conducting cover is fitted over a pair of stator coil headers, or a stator coil header and an adjacent phase connector. Thereafter, the cavity formed by the fitted cover can be filled with an insulating, solidifying or polymerizing material or resin. Use of such an apparatus insulates the entire header apparatus and prevents any accidental shorting between sets of stator coil ends.
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公开(公告)号：CA1083219A
公开(公告)日：1980-08-05
申请号：CA295960
申请日：1978-01-31
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FORT EMIL M
Abstract: RELIABLE DYNAMOELECTRIC MACHINE CONDITION MONITOR Apparatus for sensing overheated electrical insulation through the detection of thermoparticulates in a dynamoelectric machine's cooling gas system is disclosed. The cooling gas as it circulates will entrain thermoparticulates produced in the system when there is overheating. This gaseous carrier is then withdrawn and conducted to an ionization chamber where it is ionized. Downstream from the ionization chamber there is placed a first ion collector for collecting ions with relatively small radii. A second ion collector which is biased for collecting ions with relatively large radii is also placed downstream from the ionization chamber. By comparison of ion current from the first ion collector with ion current from the second ion collector it is possible to detect the presence of thermoparticulates in the cooling gas relatively independent of gas pressure, flow rate through the monitor, and effectiveness of the radiation source.
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公开(公告)号：DE2837162A1
公开(公告)日：1979-03-22
申请号：DE2837162
申请日：1978-08-25
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： SMITH JAMES D B , PHILLIPS DAVID C , FORT EMIL M , PIETSCH HERBERT E
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公开(公告)号：CA2099442A1
公开(公告)日：1994-01-02
申请号：CA2099442
申请日：1993-06-30
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： SMITH JAMES D B , BENNETT ALLAN I , FORT EMIL M
IPC: C08K5/56 , C08K5/00 , C08L101/00 , C08L101/12 , H01B3/30 , H01B3/40 , H01B3/44 , H01B3/42
Abstract: 57,221 Electrical insulation materials containing a synergistic mixture of either a metal acetylacetonate and a dicyclopentadienyl metal compound, a chromium salt and a dicyclopentadienyl compound, or a chromium salt and a metal acetylacetonate have unexpectedly high levels of corona resistance. The insulation materials preferably are prepared by dissolving the synergistic mixture in an organic resin such as an epoxy resin and then curing the resin.
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公开(公告)号：CA2057602A1
公开(公告)日：1992-06-15
申请号：CA2057602
申请日：1991-12-13
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： EMERY FRANKLIN T , SIMMONDS LEONARD B , FORT EMIL M
Abstract: W.E. 56,084 A wall structure for insulating the exterior surface of a high voltage coil having Roebeled windings is provided that comprises an inner insulating layer formed from a hardenable epoxy material for surrounding the coil and filling void spaces on the surface of the coil created by the Roebeled windings, a ground wall layer surrounding the inner layer for grounding the wall structure, and a semiconductive layer formed from a carbon filled epoxy material integrally molded around the outer surface of the inner insulating layer for reducing the electric stress across the insulating layer and in particular across any voids remaining after the insulative layer has been applied over the Roebeled windings on the exterior of the coil. The improved wall structure advantageously increases the lifespan of high voltage coils by reducing the electric stress across the inner moulding layer, thereby reducing the probability that damaging electric arcing will ever occur in any void spaces present in this layer.
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