Low cogging motor

Details Low cogging motor Low cogging motor

1986-06-20

1987-12-15

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, H02K 2100

Patent

active

047135697

ABSTRACT:
A three phase, permanent magnet rotor, AC electric motor includes a twenty-four unskewed slot stator wound in a three phase arrangement and an eight pole permanent magnet rotor in which the rotor pole pieces are unskewed and angularly displaced from equally 45.degree. spaced reference positions about the rotor by different amounts which are integral multiples of 1.875.degree.. The cogging frequency is eight times higher and the cogging torque are eighth that of a corresponding motor with a conventional permanent magnet rotor.

REFERENCES:
patent: 3149256 (1964-09-01), Kohlhagen
patent: 3333129 (1967-07-01), Kohlhagen
patent: 3860843 (1975-01-01), Kawasaki
patent: 4280072 (1981-07-01), Gotou
patent: 4438362 (1984-03-01), Brown

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