Westinghouse Electric Corporation

General Electric Company

Siemens Westinghouse Power Corporation

Siemens Energy, Inc.

Aleksandar Prole

Philip Lynn Andrew

Lon W Montgomery

Robert John Nelson

Benjamin Todd Humphries

Robert Alan Ward

Hector O Ponce

Leonard Myatt

Stephen W Cates

Abraham Nieves

Carlos A Gavilondo

Klaus Sedlazeck

In one embodiment the present invention is a Flexible Connector Assemblies (FCA)that comprises top and bottom plates connected by Flexible Connectors (FC)and provides a compliant electrical joint between the first terminal leadand the second terminal lead. These terminal leadsandare connected to the top and bottom plates eccentrically in such a way that the total currentthrough the FCA is more evenly distributed among the FCthan when the leads are centered on their respective plates. This improvement in uniformity reduces the maximum current carried by any one FC, which substantially extends the operating life of the component.

Eccentric polygonal main lead flexible connector assembly

Methods and systems consistent with the present invention provide improved online detection of one or more shorts in rotor turns () of a field winding () of an electric generator. An initial reference inductance Lis determined by an impedance-measuring circuit (). A subsequent inductance L is determined by the impedance measuring circuit (). A data processing system () compares Lto L to determine whether they differ by a predetermined amount. If Land L differ by the predetermined amount, an alarm is provided to operators to indicate the presence of one or more shorted rotor turns.

Method and apparatus detecting shorted turns in an electric generator

An assembly for mechanically clamping a laminated steel stator core including laminated steel core-end magnetic flux shunts in a dynamoelectric machine is provided. The flux shunt at each end of the stator core includes first and second surfaces for receiving the clamping assembly. The first and second surfaces may be arranged to define a step. The clamping assembly includes an inner support ring configured to engage an entire 360&#xb0; circumference of the first receiving surface of the flux shunt. The clamping assembly further includes an outer support ring configured to engage an entire 360&#xb0; circumference of the second receiving surface of the flux shunt. The respective mechanical engagement provided by the inner and outer rings relative to the flux shunt is circumferentially continuous.

Ring assembly for mechanically clamping a stator core with core-end magnetic flux shunts in a dynamoelectric machine

In a dynamoelectric machine, stacked turns are provided with registering openings for the flow of a cooling medium from a subslot radially within the rotor in a direction radially outwardly to cool the turns. Turbulators are provided in each of the turns to enhance the turbulent flow of the cooling medium which enhances the heat transfer between the heated turn and the cooling medium. The turbulators are formed by a coining operation after the openings are punched through the turn to form an inwardly directed rib effecting turbulent flow in that region and enhanced cooling effects.

Dynamoelectric machines having rotor windings with turbulated cooling passages

Method of forming rotor-winding for a dynamoelectric machine

A parallel conducting ring structure for a dynamoelectric machine is configured to be mounted as a subassembly upon a conventional support cone for wholesale installation through an opening formed in an axial end of the casing structure surrounding the stator core of a dynamoelectric machine. Tab connections are attached, at preselected locations about the axis of the stator core, to the parallel conducting ring structure and are insulated with conventional groundwall insulation. Depending upon the particular direction of rotation of the rotor and upon the direction in which the generated electromotive forces are to peak, each direction of which is selected by the utility, the subassembly is installed within the casing structure through the opening, and adapted for such particular directions by stripping the insulation from selected ones of the tab connections, attaching the main leads exiting the casing structure to such tab connections, and leaving the remaining ones of the tab connections insulated.

Method and apparatus for conducting current from a dynamoelectric machine

An axial vent channel (30) for installation in a generator rotor winding slot, the channel (30) being in the form of an elongate, closed tube of polygonal cross section enclosing a longitudinal passage (32), the tube being formed to have a closed bottom wall and an opposed, substantially closed, top wall provided with a plurality of radial vent slits (36) spaced apart along the longitudinal passage (32), the channel (30) being configured to be installed in the rotor winding slot with the passage (32) extending parallel to the axis of the rotor, the bottom wall facing toward the axis of the rotor and the top wall facing away from the axis of the rotor.

Closed channel axial vent for radially ventilated generator rotor

A standard, predetermined phase sequence of the three-phase voltage output of an electrical power generator, as produced through conventional main leads in the generator lead box which interconnect three (3) generally, axially aligned pairs of connectors of first and second sets, is selectively reversible by the utilization of crossed main leads between two adjacent pairs of the connectors of the first and second sets. Each of the crossed main leads includes opposite end portions aligned with the diagonally-related and interconnected pair of connectors of the first and second sets, the end portions having corresponding bends therein for smoothly contouring and integrally joining the central portions thereof, and the central portions have complementary outward bends in at least the mutual crossing portions thereof to maintain a predetermined, minimum distance therebetween so as to satisfy voltage strike requirements. Insulating support plates maintain the required minimum distance between the mutual crossing portions and special, directional ventilating ducts compensate for increased eddy current heating of localized areas of the lead box.

Growing community of inventors

Winter Springs, FL, United States of America

Aleksandar Prole