Electric motor

Details Electric motor Electric motor

1987-03-18

1988-07-05

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 12, 310 49R, 310155, 310156, H02K 102, H02K 3704, H02K 3708

Patent

active

047557036

ABSTRACT:
The invention relates to improvement of a motor with a rotor including a permanent magnet. The motor comprises a yoke of soft magnetic material, a plurality of field poles each having a field core of semi-hard magnetic material and a pole piece of soft magnetic material, a plurality of coils wound around the field cores respectively, and a rotor including a permanent magnet. In this constitution, utilizing action of the minor loop of the field cores of semi-hard magnetic material, the residual magnetic flux density of the plurality of field cores is controlled in sequence and the shifting magnetic field is induced thereby the magnetic poles of the rotor are attracted in sequence so as to move the rotor.

REFERENCES:
patent: 3230406 (1966-01-01), Henry-Baudot
patent: 3869626 (1975-03-01), Puttock
patent: 4087709 (1978-05-01), Haydon

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