Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1984-07-05
1985-09-17
Wong, Peter S.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 42, 310254, H02K 2342
Patent
active
045423148
ABSTRACT:
A permanent-magnet excited commutator motor, particularly a multipole small motor, has a stator yoke, an armature, two permanent magnet elements having a relatively low permeability, the permanent magnet elements having end tips with a gap formed between, the permanent magnet elements having one tip located forwardly as considered in the rotary direction of the armature, and a ferromagnetic auxiliary pole arranged on the stator yoke and having a relatively high permeability, the auxiliary pole being a U-shaped bracket having legs abutting against the end faces of the low permeability magnet elements, the bracket which forms the auxiliary pole being elastic and asymmetrical and formed as a holding spring, and legs of the bracket including a thicker leg and a thinner leg, where the thicker leg is formed as a stray web abutting against the permanent magnet tip lying forwardly in the rotary direction of the armature.
REFERENCES:
patent: 3083310 (1963-03-01), Tweedy et al.
patent: 3594599 (1971-07-01), West et al.
patent: 3988623 (1976-10-01), Yamaguchi et al.
patent: 4182027 (1980-01-01), Benezech
Corbach Rainer
Mohr Adolf
Utsch Berthold
Zimmermann Kurt
Rebsch D. L.
Robert & Bosch GmbH
Striker Michael J.
Wong Peter S.
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