Patent ID: 8704420

Claim:
A stator for an electric machine, the stator comprising: a stator core; a plurality of teeth that extend into a first direction from the stator core and are arranged such that a slot is formed between adjacent teeth; a first series of coils that are assembled into the slots and are formed into predetermined shapes; and a second series of coils that are assembled into the slots and are formed into predetermined shapes, wherein each of the first series of coils includes a pair of inserting portions respectively inserted into the slots, and a pair of first coil ends protruding from both end surfaces of the stator core, each of the first coil ends including a pair of bent portions extending from ends of the pair of inserting portions into a second direction that is opposite to the first direction, and a bridge portion that connects the bent portions with each other, each of the second series of coils includes a pair of inserting portions respectively inserted into the slots, and a pair of second coil ends protruding from both end surfaces of the stator core, each of the second coil ends including a pair of upright portions extending from ends of the pair of inserting portions, and a bridge portion that connects the upright portions with each other, the bridge portions of the first series of coils are disposed on the side toward the second direction with respect to the bridge portions of the second series of coils, the bridge portions of the second series of coils each extend across the bent portions of two adjacent first series of coils, the first series of coils and the second series of coils are configured so that each series includes a mixture of coils of at least two phases among a U-phase, a V-phase and a W-phase, and each of the coils in the first series is connected to a coil of the same phase in the second series, and the teeth include a plurality of stationary teeth and split teeth, the stationary teeth being integrally formed on the stator core such that the first series of coils and the second series of coils can be assembled to the stationary teeth, and each split tooth attached to the stator core at a position between adjacent stationary teeth.