Voice coil motor with an encoder

Details Voice coil motor with an encoder Voice coil motor with an encoder

1989-03-31

1991-01-29

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

360104, 369 43, H02K 4100, G11B 2110

Patent

active

049889044

ABSTRACT:
The present invention relates to a voice coil motor with an encoder. In a voice coil motor whose rotor rotates in a prescribed angular width to a base, a rotary disc for encoding is attached to the fringe section of the rotor, and an encoder is provided on the base corresponding to the track of the rotary disc. Attaching the rotary disc to the fringe section of the rotor, the length of the track can be long, so that number of slits perforated on the rotary disc can be increased. Therefore, resolution of the angular position of the rotor can be high.

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