Rotor for an electronically controlled micromotor

Details Rotor for an electronically controlled micromotor Rotor for an electronically controlled micromotor

1975-02-03

1976-08-03

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310263, H02K 2112

Patent

active

039731537

ABSTRACT:
A rotor for a micromotor with electronic control comprising an axle on which are mounted two plates of ferro-magnetic material at least one of which carries permanent magnets, all the permanent magnets mounted on the same plate being of the same polarity. Poles of ferro-magnetic material are interposed between these magnets and each plate is separately magnetized after mounting of the magnets, in a unidirectional magnetic field before assembling the two plates on the axle. The magnets can be mounted on a intermediate element of non-ferro-magnetic material which itself is fixed on the plate by adhesives, riveting, or swaging. The two plates are mounted on the axle such that the magnets of one face the poles of ferro-magnetic material of the other.

REFERENCES:
patent: 2133082 (1938-10-01), Cox
patent: 2230878 (1941-02-01), Bohli
patent: 3513341 (1970-05-01), Gratzmuller

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