Denso Corporation

Yoshihisa Shuji

Masahito Fujieda

Toshiaki Uga

Hiroshi Endo

Hirotaka Kurozaki

Kenichirou Takagi

A rotating electric machine includes a stator and a rotor. The stator includes a stator core that has a plurality of slots that are arranged in a circumferential direction and a stator winding that has a plurality of phase coils that are wound in the slots. The rotor is arranged so as to oppose the stator in a radial direction and has a plurality of magnetic poles in the circumferential direction. In the rotating electric machine, each of the phase coils has a plurality of series-connection coil groups that each includes n unit coils that are arranged to be wound in the circumferential direction. In each of the series-connection coil groups, a first end thereof is connected to a phase terminal for a respective phase and a second end is connected to a neutral point, and the series-connection coil groups are connected in parallel.

Rotating electric machine

A rotating electrical machine is equipped with a stator including a stator winding and a stator core with slots. The stator winding includes phase coils each of which is wound in the slots and connected at an end to a phase terminal and at the other end to a neutral point. The phase coils are each made up of unit coils connected in series between a corresponding one of the phase terminals and the neutral point and connected together using connecting conductors. Each of the phase coils includes two or more reversing connecting conductors each of which orients a direction in which the connecting conductor extends from the (i+1)unit coil to the (i+2)unit coil to be opposite to that in which the connecting conductor extends from the iunit coil to the (i+1)unit coil. This coil layout ensures a desired degree of electrical insulation in the stator.

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Kariya, Japan

Yoshihisa Shuji