Method for adjusting encoder in a brushless motor-encoder combin

Details Method for adjusting encoder in a brushless motor-encoder combin Method for adjusting encoder in a brushless motor-encoder combin

1988-03-18

1989-08-29

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02K 2906, G01D 500

Patent

active

048620440

ABSTRACT:
A method for adjusting an encoder directly coupled with a brushless motor, wherein a set of sensor match marks are provided on a sensor base plate mounting a number of sensor elements, while another set of disc match marks are provided on an encoder disc at positions where, during the time when the motor is energized but locked, a phase difference between an EMF voltage waveform of the motor and the output voltage waveform of a specific phase of the encoder is made equal to a predetermined value, rough adjustment of the encoder is executed by aligning the two sets of match marks between each other, a gap between the encoder disc and the sensor is adjusted suitably, and then the sensor base plate is slightly rotated relative to the stator of the brushless motor for executing a fine adjustment of the encoder.

REFERENCES:
patent: 3917988 (1975-11-01), Payne
patent: 4642496 (1987-02-01), Kerviel et al.
patent: 4740733 (1988-04-01), Epars
patent: 4761590 (1988-08-01), Kaszman

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