Rotor for a synchronous motor

Details Rotor for a synchronous motor Rotor for a synchronous motor

1987-04-24

1988-05-31

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310269, H02K 2112

Patent

active

047483601

ABSTRACT:
A rotor for a synchronous motor, having a plurality of first magnetic poles formed by a plurality of permanent magnets respectively and disposed at practically equal circumferential intervals on the outer circumference of a yoke fixed to a rotatable motor shaft, and a second magnetic pole projecting radially from the yoke adjacently to each first magnetic pole and the second magnetic pole wherein the shape of the pole face of each first magnetic poles are in a circular arc and the shape of the pole face of each of second magnetic pole is determined by a given equation so that the magnetic flux distribution established by a pair of the first magnetic pole and the second magnetic pole is substantially equivalent to a sinusoidal magnetic flux distribution in the sweeping effect by the armature coils of each phase of the stator.

REFERENCES:
patent: 3696260 (1972-10-01), Lace
patent: 4406958 (1983-09-01), Palmero et al.
patent: 4661736 (1987-04-01), Kawada et al.

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