Patent ID: 9425666
Filing Date: 2016-08-23
CPC Classification: B60L,H02K,Y02T

Claim Text:
1. A stator, comprising: a stator core with N pieces of slots ranging along an axial direction, which are formed side-by-side along a circumferential direction; and a stator winding installed in the slots at the stator winding, wherein: the stator winding includes a plurality of winding groups, each made up with N pieces of lap-wound coils each formed by winding a conductor wire a plurality of times; the winding groups are disposed in a plurality of layers set side-by-side along a radial direction at the stator core; one coil side at each of the lap-wound coils is inserted in a specific slot on an inner side along the radial direction in a specific layer and another coil side of the lap-wound coil is inserted in another slot on an outer side along the radial direction in the specific layer, and when the winding groups, each corresponding to different phases, are made up with n pieces of coil windings Ui, n pieces of coil windings Vi and n pieces of coil windings Wi (i=1˜n), a total of the plurality of layers is n and the plurality of winding groups are notated as Lj (j=1˜n), n pieces of winding groups Lj, each made up with a coil winding Ui, a coil winding Vi and a core winding Wi, are wound over the n layers, starting from an inner circumferential side toward an outer circumferential side at the stator core.