Electric motor having frequency generator

Details Electric motor having frequency generator Electric motor having frequency generator

1976-10-19

1978-08-22

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310112, 310268, 318254, H02K 1100

Patent

active

041091701

ABSTRACT:
An electric motor having a rotor consisting of a disk-shaped multi-polar magnet circumferentially sectioned to have a plurality of magnetic poles, a stator consisting of a pair of superimposed star-shaped flat driving coils, said driving coils being disposed facing said magnet, said driving coils being arranged to be supplied with respective alternating currents having a phase differential of 90.degree. thereby to drive the disk-shaped magnet, said motor further comprising a speed detecting coil having a plurality of radially disposed generating wire elements, said generating wire elements being disposed within a magnetic field of said magnet and being connected in series, whereby a signal having a frequency corresponding to the revolution speed of said disk-shaped magnet is induced in said speed detecting coil.

REFERENCES:
patent: 3109114 (1963-10-01), Henry-Baudot
patent: 3219861 (1965-11-01), Burr
patent: 3230406 (1966-01-01), Henry-Baudot
patent: 3402333 (1968-09-01), Hayner
patent: 3569753 (1971-03-01), Babikyan
patent: 3796899 (1974-03-01), Giachello
patent: 3906267 (1975-09-01), Coupin et al.

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