SUPPORT STRUCTURE FOR DYNAMOELECTRIC MACHINE STATORS SPIRAL PANCAKE WINDING

• Main Authors: FLICK, CARL, YING, SUIUN
• Format: Patent
• Language: English; French
• Published: 08.02.1983
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

48, 439 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 13 48,439 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.