ADVANCED SPIRAL PANCAKE ARMATURE FOR A DYNAMOELECTRIC MACHINE AND METHOD FOR MAKING SAME

摘要

21 A spiral pancake armature winding assembly for a superconducting generator is provided which incorporates inner and outer support tubes along with a middle support tube disposed within the pancake coil assembly itself. A plurality of filler pieces, each of which is shaped to fit within a generally rectangular opening of each pancake coil, are rigidly attached to each other in such a way so as to form a middle support tube which provides mechanical support to the pancake coils and prevents relative circumferential movement between adjacent pancake coils. The inner and outer support tubes are shaped to fit within the bore of the spiral pancake armature winding and around its outer periphery. A plurality of spiral wedges, or ramps, are used in conjunction with the inner and outer support tubes in order to provide an improved fit between the support tubes and the spiral pancake armature winding. An assembly method is described which progresses from a configuration in which the plurality of pancake coils are loosely arranged in a pinwheel association to the compact spiral pancake armature winding in which each of the plurality of pancake coils is in contact with other adjacent pancake coils.