John A Sargeant

US Patent:

7202587, Apr 10, 2007

Filed:

Jan 7, 2005

Appl. No.:

11/031791

Inventors:

John Barry Sargeant - Oviedo FL, US
Alex Christodoulou - Oviedo FL, US

Assignee:

Siemens Power Generation, Inc. - Orlando FL

International Classification:

H02K 1/12

US Classification:

310258, 310217

Abstract:

The present invention facilitates the placement of laminations onto keybars of stator generators frames. Laminations need to be tightly fit onto keybars , however, the same need for tightness makes stacking laminations onto keybars particularly onerous. This is magnified when donuts, which are preassembled groups of laminations, are attempted to be stacked onto the keybars. The present invention provides for enlarged grooves that more easily accept the keybars. This makes stacking laminations, both individually and in donuts, much easier. The laminations are then held in position by the insertion of a wedge. The wedge may be placed to disperse forces transferred to the laminations in a circumferential manner.

US Patent:

8319405, Nov 27, 2012

Filed:

Aug 20, 2010

Appl. No.:

12/859873

Inventors:

David T. Allen - Longwood FL, US
John B. Sargeant - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

H02K 1/18

US Classification:

310431, 310413, 310415

Abstract:

A generator including a generator frame (, FIG. ), frame rings () extending from an inside surface of the frame (), stacked laminations forming a stator core () disposed within the generator frame (), a spring bar (, FIG. ) spanning a distance between at least two frame rings (), a first spring bar end attached to a first frame ring () and a second opposing spring bar end attached to a second frame ring (), at least one bracket () attached to the spring bar (); and a first and a second keybar () attached to the bracket (), each keybar () for engaging a corresponding groove within the stator core ().

US Patent:

60911778, Jul 18, 2000

Filed:

Mar 22, 1999

Appl. No.:

9/274260

Inventors:

Luis Enrique Carbonell - Deltona FL
John Barry Sargeant - Oviedo FL
Lon W. Montgomery - Winter Springs FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

H02K 500

US Classification:

310 91

Abstract:

A support system for an electric generator having a spring bar connected between the stator frame and a vertical spring plate mounted on a foundation. The spring bar provides flexibility in the tangential direction to minimize the magnitude of torque loads transmitted to the foundation during short circuit operating conditions. The spring plate provides flexibility in the radial direction to minimize the magnitude of vibration loads transmitted to the foundation during normal operating conditions. The combination of a spring bar with a spring plate allows the support system designer to optimize the natural frequency of the support system in both the tangential and radial directions.

US Patent:

51210223, Jun 9, 1992

Filed:

Aug 29, 1990

Appl. No.:

7/574021

Inventors:

John B. Sargeant - Oviedo FL
Lorenzo Ramirez - Oviedo FL
Robert T. Hagaman - Oviedo FL

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02K 106

US Classification:

310217

Abstract:

A rotor for an electromagnetic energy conversion device, which rotor includes a core composed of a stack of thin plates, is clamped between two end plates by means of a plurality of end clamping fingers. Each clamping finger is initially mounted on a respective end plate and is then pressed against the core by a clamping force applied via the end plates.

US Patent:

58755403, Mar 2, 1999

Filed:

Jan 21, 1997

Appl. No.:

8/775338

Inventors:

John Barry Sargeant - Oviedo FL
Gurdev Singh - Oviedo FL
Calvin L. Paris - Oviedo FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

H02K 1502
H02K 1512

US Classification:

29516

Abstract:

An improved stator core and process for manufacturing the core are accomplished by a modular stator core design. The stator core is comprised of a series of equally sized and shaped stator core modules that are manufactured via a vacuum pressure impregnation process. The prefabricated modules can then be assembled into a stator core in an efficient way, saving several days of stator core assembly time. Moreover, a variety of stator core lengths can be accommodated by only inserting the required number of modules into the stator frame.

US Patent:

61441295, Nov 7, 2000

Filed:

Apr 22, 1999

Appl. No.:

9/298260

Inventors:

Robert Allen Fuller - Orlando FL
John Barry Sargeant - Oviedo FL
Derek Wayne Green - Charlotte NC

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

H02K 500

US Classification:

310 91

Abstract:

A support system for an electric generator having a tapered spring bar connected between the stator core and stator frame, where the spring bar has a continuously tapered cross-sectional area along its length. The tapered cross-section provides a larger cross-sectional area at points having high bending moment and a smaller cross-sectional area at points having low bending moment. By eliminating material in areas of low bending force, a robust support system having increased flexibility is provided. The spring bar may further be formed from a plurality of thinner laminations, thereby providing the support system designer with an additional degree of flexibility for independently controlling the natural frequency of the supports in the radial and tangential directions.

US Patent:

57058750, Jan 6, 1998

Filed:

Sep 13, 1996

Appl. No.:

8/712656

Inventors:

Kevin Joseph Konrad - Orlando FL
David Norwood Dorsey - Pensacola FL
John Barry Sargeant - Oviedo FL

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

H02K 346

US Classification:

310260

Abstract:

In an electrodynamic apparatus, a method of securing a coil basket of the type that includes a plurality of top coils and a plurality of bottom coils to a bracing assembly that includes a plurality of support braces includes steps of banding the top coil, the bottom coil and the support brace to each other; positioning a number of inflatable bladders, respectively, between the top coils and the bottom coils in the location of the bandings; and simultaneously inflating the bladders to a predetermined pressure that is sufficient to tension the bandings to a predetermined force, whereby forces that are transmitted to the coil basket from such inflation are imparted evenly throughout the coil basket and at the same time.

US Patent:

57676020, Jun 16, 1998

Filed:

Feb 13, 1997

Appl. No.:

8/800188

Inventors:

John Barry Sargeant - Oviedo FL

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

H02K 504
H02K 518

US Classification:

310258

Abstract:

A fluted stator frame for an electric generator is provided. The fluted stator frame has a frame shell, a plurality of flat plates, a plurality of inner frame rings and a plurality of revised axial spring bars. A stator core is connected to the inner frame rings by means of the revised axial spring bars. The inner frame rings are connected to the frame shell by means of the flat plates. Each flat plate is slanted so that the plurality of flat plates are arranged in a truss formation. The spaces between the flat plates and the frame shell define gas flow ducts. The gas flow ducts provide a path for a flow of cooling gas to remove heat from the stator core of the generator.