Sensorless spindle motor control apparatus

Details Sensorless spindle motor control apparatus Sensorless spindle motor control apparatus

1994-05-31

1995-07-11

Cabeca, John W.

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 318138, 318721, H02P 602

Patent

active

054324149

ABSTRACT:
When a sensorless spindle motor having a rotor and a plurality of coils is started, a CPU outputs phase control signals to an excitation phase switching circuit to forcibly rotate the rotor. The CPU detects based on rotor position signals from a rotor position detecting circuit whether or not the rotor is rotated in the forced rotation. As a result, when the rotor is not rotated, the CPU retries the forced rotation. In each retried forced rotation, the CPU decreases the rotational speed of an excitation phase of each coil. The CPU may also execute the forced rotation after the rotor is aligned to an arbitrary position. When the rotor is not rotated in the forced rotation, the CPU retries the forced rotation. In each retried forced rotation, the CPU changes the excitation start phase.

REFERENCES:
patent: 4169990 (1979-10-01), Lerdman
patent: 4642537 (1987-02-01), Young
patent: 4928043 (1990-05-01), Plunkett
patent: 5017845 (1991-05-01), Larobdante et al.
patent: 5036264 (1991-07-01), Ueki
patent: 5166583 (1992-11-01), Min et al.
patent: 5182499 (1993-01-01), Inaji et al.
patent: 5202612 (1993-04-01), Yoshida et al.

Affiliated with

Also associated with

Rating

Sensorless spindle motor control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sensorless spindle motor control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensorless spindle motor control apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-505455