Support structure for dynamoelectric machine stators spiral pancake winding

• US 4,292,558 A
• Filed: 08/15/1979
• Issued: 09/29/1981
• Est. Priority Date: 08/15/1979
• Status: Expired due to Term

• Current Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Original Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Inventors: Ying, Sui-Chun, Flick, Carl
• Primary Examiner(s): Budd, Mark O.
• Application Number:
  US06/066,732
• Time in Patent Office: 776 Days
• Field of Search: 310/43, 310/45, 310/51, 310/179, 310/180, 310/184, 310/192, 310/193, 310/214, 310/198-208, 310/259, 310/260, 310/270
• US Class Current: 310/194
• CPC Class Codes: H02K 3/04 Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• CPC Class Codes: H02K 3/47 Air-gap windings, i.e. iron-free windings
• CPC Class Codes: H02K 55/04 with rotating field windings
• CPC Class Codes: Y02E 40/60 Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

A support structure for unitizing coil turns into a single member and bracing each coil of a multi-coil stator dynamoelectric machine. Each stator coil includes several turns relatively concentrically disposed. Each coil turn constitutes two longitudinal conductor portions and two end turn conductor portions. One end turn portion serially connects two longitudinal portions and the remaining end turn portion serially connects one of the longitudinal portions with a longitudinal portion of a concentrically adjacent coil. Each coil preferably lies in a plane defined by a portion of a cylinder and the coils are disposed in a cylindrical arrangement having a longitudinal axis therethrough such that one longitudinal portion of the outermost coil turn lies along the outer radial extent of the cylindrical arrangement and the remaining longitudinal portion of the outermost coil turn lies radially nearer the longitudinal axis of the cylindrical arrangement. A rigid foundation member is situated in the plane of each coil within the concentrically innermost turn. Turns of each coil are structurally connected either directly to the foundation member or indirectly to the foundation member by being intermediately joined to a turn already joined to the foundation member. The concentric turns of each coil are separated by a predetermined distance through the use of interposed spacer members situated at desired axial and circumferential locations. Such coils present a spiral pancake appearance and are cooperatively disposed in the cylindrical arrangement between radially inner and outer supporting structures. Appropriately shaped wedges are disposed between selected coils and internal/external supporting members to account for the skewed or spiral manner in which each of the coils is arranged in the substantially cylindrical arrangement. Radial tie rods extending between the radially internal and external support members structurally integrate those members so as to insure structural integrity of the cylindrical arrangement. The radially external support member is preferably configured to extract load components from individual coil turns exposed at the cylindrical arrangement'"'"'s outer periphery by either having radially inwardly directed struts extending between adjacent turns or having notches within which the radially outer conductor turns, when canted, are receivable.

Claims

1. A dynamoelectric machine comprising:

a frame structure; and

a substantially cylindrical stator structure having a longitudinal axis, said stator structure being supported by said frame, said stator structure comprising

a plurality of electrical coils, each of which comprise an electrical conductor formed in a plurality of concentric turns which are serially electrically connected, said turns in each coil spiraling outwardly about the longitudinal axis,

rigid foundation means, disposed within the concentrically innermost turn of each coil, for structurally supporting the turns of each coil, and comprising a support member lying in a curved plane which corresponds to the spiral shape of the associated coil, said member'"'"'s plane thickness perpendicular to said spiral being less than or equal to said associated coil'"'"'s conductor'"'"'s thickness perpendicular to said spiral, and

means for structurally connecting said turns of each coil with said supporting foundation means of each coil including a first plurality of bands protruding through said support member and in engagement with said turns, said engagement being on said turn'"'"'s remote side relative to said support member, said bands being disposed at selected axial and circumferential locations.

2. A dynamoelectric machine in claim 1 further comprising:

means for maintaining separation spaces between said turns of each coil.

3. The dynamoelectric machine in claim 2, said conductor turn separation means comprising:

a plurality of blocks disposed between adjacent turns at selected axial and circumferential locations.

4. The dynamoelectric machine in claim 1, said structural connecting means further comprising:

a second plurality of bands wherein each band provides securing engagement for two turns, said engagement being on opposite sides of said engaged turns.

5. A dynamoelectric machine comprising:

a frame structure; and

a substantially cylindrical stator structure having a longitudinal axis, said stator structure being supported by said frame, said stator structure comprising

a plurality of electrical coils, each of which comprise an electrical conductor formed in a plurality of concentric turns which are serially electrically connected, said turns in each coil spiraling outwardly about the longitudinal axis,

rigid foundation means disposed within the concentrically innermost turn of each coil for structurally supporting the turns of each coil,

means for structurally connecting said turns of each coil with said supporting foundation means of each coil,

means disposed radially inside said electrical coils for radially internally supporting said plurality of coils; and

means disposed radially outside said electrical coils for radially externally supporting said plurality of coils comprising a plurality of struts supported by said radially external support means, said struts protruding substantially radially inwardly between adjacent turns for extracting load components from individual turns.

6. The dynamoelectric machine in claim 5 further comprising:

intermediate support means for structurally integrating said radially internal and external support means, said integrating support means being radially disposed between said internal and external support means.

7. A dynamoelectric machine comprising:

a frame structure; and

a substantially cylindrical stator structure having a longitudinal axis, said stator structure being supported by said frame, said stator structure comprising

a plurality of electrical coils, each of which comprise an electrical conductor formed in a plurality of concentric turns which are serially electrically connected, said turns in each coil spiraling outwardly about the longitudinal axis,

rigid foundation means disposed within the concentrically innermost turn of each coil for structurally supporting the turns of each coil,

means for structurally connecting said turns of each coil with said supporting foundation means of each coil,

means disposed radially inside said electrical coils for radially internally supporting said plurality of coils; and

means disposed radially outside said electrical coils for radially externally supporting said plurality of coils comprising wherein coil turns radially adjacent said external support means are canted so as to be receivable in notches on said radially adjacent external support means.