MULTI-GAP TYPE ROTARY ELECTRIC MACHINE

摘要

A multi-gap type rotary electric machine is provided, where the machine is provided a shaft supported rotatably by a baring secured to a housing. An annular rotor is secured to the shaft and configured to rotate together with the shaft. Double stators are secured to the housing and configured to have gaps between the stators and the rotor. Relationships of:;3.51  (2);are met, where P6 denotes a circumferential width of each of outer salient poles, P7 denotes a circumferential width of each of inner salient poles, and P13 denotes a circumferential width of each of the outer magnets.

主权项

1. A multi-gap type rotary electric machine, comprising:
a shaft supported rotatably by a baring secured to a housing; an annular rotor secured to the shaft and configured to rotate together with the shaft; and a stator secured to the housing and configured to have a gap between the stator and the rotor, wherein the rotor comprises an annular rotor core made of soft magnetic material and configured to have a radial direction and a circumferential direction, a plurality of inner magnets, each composed of a permanent magnet, embedded in radially inner portions of the rotor core at equal pitches in the circumferential direction, and a plurality of outer magnets, each composed of a permanent magnet, embedded in radially outer portions of the rotor core at equal pitches in the circumferential direction; the rotor core comprises a plurality of inner salient poles each formed between mutually adjacent two of the inner magnets in the circumferential direction, and a plurality of outer salient poles each formed between mutually adjacent two of the outer magnets in the circumferential direction, the inner and outer salient poles being made of soft magnetic material; the stator comprises at least an inner stator located on a radially inner side of the rotor with a gap left between the inner stator and the rotor, and an outer stator located on a radially outer side of the rotor with a gap left between the outer stator and the rotor, wherein the inner stator comprises an inner stator core provided with a plurality of inner slots formed on an radially outer circumference of the inner stator at equal intervals in the circumference direction and a plurality of inner teeth formed on the radially outer circumference at equal intervals in the circumferential direction, the inner slots and the inner teeth being aligned alternately in the circumferential direction; and an inner stator winding full-pitch wound at the inner stator core through the inner slots, the outer stator comprises an outer stator core provided with a plurality of outer slots formed on an radially inner circumference of the outer stator at equal intervals in the circumference direction and a plurality of outer teeth formed on the radially inner circumference at equal intervals in the circumferential direction, the outer slots and the outer teeth being aligned alternately in the circumferential direction; and an outer stator winding full-pitch wound at the outer stator core through the outer slots, wherein relationships of:
3.51  (2)are met, where P6 denotes a circumferential width of each of the outer salient poles, P7 denotes a circumferential width of each of the inner salient poles, and P13 denotes a circumferential width of each of the outer magnets.