Rotational speed signal sensor

Details Rotational speed signal sensor Rotational speed signal sensor

1979-05-23

1981-11-24

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310138, 310156, 310266, H02K 4704

Patent

active

043026923

ABSTRACT:
A rotational speed signal sensor for a motor having a rotating permanent magnet as a rotor. One cylindrical surface of a hollow cylindrical rotating magnet has a series of magnetic poles which coact with the stator windings so as to produce the torque while the other cylindrical surface of the rotating magnet has a series of magnetic poles which coact with a sensor coil so as to derive the rotational speed signal.

REFERENCES:
patent: 2912609 (1959-11-01), Kassner
patent: 3230434 (1966-01-01), Bauerlein
patent: 3231770 (1966-01-01), Hyde
patent: 3355645 (1967-11-01), Kawakami et al.
patent: 3479539 (1969-11-01), Brion
patent: 3969644 (1976-07-01), Nowak
patent: 4082968 (1978-04-01), Jones
patent: 4082970 (1978-04-01), Girardin
patent: 4237394 (1980-12-01), Aoki

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