Permanent magnet excited electric motor

Details Permanent magnet excited electric motor Permanent magnet excited electric motor

1988-07-13

1991-03-05

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310193, 310254, 310156, H02K 524

Patent

active

049980327

ABSTRACT:
A permanent magnet excited motor is provided with a plurality of low circumferential hump-like protrusions on the face of each stator pole to partially decrease the air gap between the stator and rotor and act as so-called magnetic cams to exert a force on the rotor to smooth an otherwise uneven parasitic slot torque that occurs between the interaction of slot openings of the stator poles and the gaps between the permanent magnet poles of the rotor.

REFERENCES:
patent: 4088909 (1978-05-01), Matsumura et al.
patent: 4516048 (1985-05-01), Brigham
patent: 4672253 (1987-06-01), Tajima et al.
patent: 4691132 (1987-09-01), Bertram et al.

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