Permanent magnet rotary motor

Details Permanent magnet rotary motor Permanent magnet rotary motor

2007-02-27

2007-02-27

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156460

Reexamination Certificate

active

11131014

ABSTRACT:
A permanent magnet rotary motor that can maintain higher torque density and reduce cogging torque more greatly than a conventional permanent magnet rotary motor. A pair of end surfaces of each of permanent magnets used for a rotor are substantially parallel to a virtual plane that extends in the radial direction of a rotor core while passing through the centers of a stator core and an arc surface. Then, the length of the arc surface in the peripheral direction of a rotor core and inclinations of inclined surfaces are so determined that a pole arc ratio Ψ1of the arc surface and a pole arc ratio Ψ2of a magnetic pole surface in each permanent magnet satisfy the relation of P/2N≦Ψ2−Ψ1≦1.38×P/2N.

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