Permanent magnet type electric rotating machine and hybrid...

Details Permanent magnet type electric rotating machine and hybrid... Permanent magnet type electric rotating machine and hybrid...

2005-11-08

2005-11-08

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156530, C310S261100, C180S065100

Reexamination Certificate

active

06963154

ABSTRACT:
A permanent magnet type electric rotating machine comprises a stator having a salient-pole concentrated winding, and a rotor disposed with a rotational gap, and having a plurality of permanent magnets arranged and fixed in a circumferential direction inside, and an auxiliary salient pole provided between the permanent magnets. A ratio of the number of poles for the rotor and the number of slots for the stator is 2:3 and, when a slot pitch of the stator is τs (electrical angle), an angle θ (electrical angle) made by a circumferential width of the permanent magnet in the surface of the stator side with an axis of the rotor is set at θ≈n×τs/2+8×m (n=1 or 2, and m=1, 2 or 3). Thus, pulsation torque, cogging torque or the waveform distortion of a no-load induced voltage is selectively reduced as occasion demands.

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