Rotation sensor device

Details Rotation sensor device Rotation sensor device

1979-07-24

1982-05-11

Duggan, Donovan F.

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318723, 318254, 318653, 310 68R, 310 68A, 310268, H02K 2900

Patent

active

043296360

ABSTRACT:
A plurality of slots are disposed at equal angular intervals on one portion of a circular ring-shaped field magnet fixed to a motor's rotor to run radially of the magnet. Alternatively, short rods made of a soft magnetic material may extend radially outwards from the lateral surface of the magnet to form the slots between them. Three magnetic sensor elements are disposed at equal angular intervals of 120 degrees on a motor's stator to face successively the slots during the rotation of the rotor.

REFERENCES:
patent: 3911339 (1975-10-01), Rettig
patent: 3988654 (1976-10-01), Takahashi et al.
patent: 4093897 (1970-06-01), Fujita et al.
patent: 4109170 (1970-08-01), Fujita et al.
patent: 4125796 (1978-11-01), Nagase et al.
patent: 4135120 (1979-01-01), Hoshimi et al.
patent: 4220879 (1980-09-01), Hoshimi et al.
patent: 4260920 (1981-04-01), Nakamura et al.

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