Sectioned conductor and related methods for accommodating stress and avoiding internal deformations in power generator

• US 6,734,588 B2
• Filed: 08/02/2001
• Issued: 05/11/2004
• Est. Priority Date: 08/02/2001
• Status: Active Grant

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Siemens Westinghouse Power Corporation
• Inventors: Leonov, Vladimir
• Primary Examiner(s): Mullins, Burton S.
• Assistant Examiner(s): Gonzalez, Julio C.
• Application Number:
  US09/921,083
• Publication Number:
  US 20030025419A1
• Time in Patent Office: 1,013 Days
• Field of Search: 310/232, 310/234, 310/51, 310/61, 310/71, 310/91, 310/174, 310/233
• US Class Current: 310/71
• CPC Class Codes: H02K 3/51 applicable to rotors only

Abstract

A sectioned conductor adapted to accommodate stress forces with reduced internal deformation while forming a conductive path between the rotor coils and a radial stud extending into the rotor shaft of a power generator is provided along with related methods. The sectioned conductor is formed of at least two distinct, spaced apart members that remain electrically connected as the second sectioned member moves relative to the first sectioned member in response to stress forces including those arising from centrifugal force caused by the rotation of the rotor shaft within a stator coil, thermal expansion as caused by temperature increases in conductive components of the power generator, and from vibratory motions of the power generator.

Claims

1. A sectioned conductor for accommodating stress forces with substantially reduced internal deformation while providing a conductive path between a rotor coil and a radial stud in a power generator, the sectioned conductor comprising:

a first sectioned member connected to the radial stud; and

a second sectioned member electrically connected to the first sectioned member and adapted to remain electrically connected thereto when moving relative to the first sectioned member in response to stress forces to thereby reduce internal deformation of the sectioned conductor,

wherein the first sectioned member comprises an axial portion adapted to be connected to the rotor shaft and to the radial stud extending into the rotor shaft and a radial portion extending outwardly from the axial portion in a radial direction relative to the lengthwise extent of the rotor shaft, and wherein the second sectioned member comprises a first end adapted to be connected to the at least one rotor coil and a second end through which a bore extends thereby defining a substantially hollow conductor channel having at least three sides to at least partially receive therein the axial portion of the first sectioned member.

2. A sectioned conductor as defined in claim 1, wherein the radial portion of the first sectioned member is electrically connected to the second sectioned member by at least one strip spring having a first connection connected to a surface of the conductor channel into which the radial portion of the first member at least partially extends and having a second opposing connection connected to the radial portion of the first sectioned member of die elastic conductor.

3. A sectioned conductor as defined in claim 2, wherein the first sectioned member and the second sectioned member are each formed of a material having low ohmic resistance to thereby reduce current-induced temperature effects in the sectioned conductor when the sectioned conductor conducts electrical current between the radial stud and the at least one rotor coil.

4. A sectioned conductor as defined in claim 3, wherein the sectioned conductor further comprises a structural support having a first end connected to the first sectioned member of the sectioned conductor and a second end connected to the rotor to which the first sectioned member of the sectioned conductor is connected to thereby provide enhanced mechanical support to the sectioned conductor.

5. A sectioned conductor as defined in claim 4, wherein the sectioned conductor further comprises an open groove extending through a portion of the second sectioned of the sectioned conductor, a portion of the first sectioned member of the sectioned conductor extending into the groove and being electrically connected to a surface portion of the groove and the first end of the structural support extending in to the groove and fixedly connecting to the portion of the first sectioned member positioned therein such that the second sectioned member is able to move relative to first section freely and unobstructed by the first end of the support structure in response to stress forces.