Digital spindle control architecture

Electricity: motive power systems – Switched reluctance motor commutation control

Reexamination Certificate

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Details

C318S434000, C318S132000, C318S801000, C318S802000, C318S803000, C318S804000, C318S805000, C318S806000, C318S807000, C318S808000, C318S809000, C318S810000, C318S811000

Reexamination Certificate

active

07034478

ABSTRACT:
A three-phase spindle motor has three terminals each driven with pulse width modulated signals. Rotation of the motor is controlled by iteratively measuring an electrical period of the motor, determining a rotational position of the motor, and synchronizing the sinusoidal pulse width modulation of the spindle motor with the measured electrical period. The electrical period of the motor is measured by detecting zero crossings in the a back electromotive force induced at a first terminal of the motor and determining the time between successive zero crossings. The rotation position of the motor is determined based upon the last measured electrical period and a location of last detected zero crossing. The zero crossings are detected by selecting a time window during which the back electromotive force signal is sensed for zero crossings. The time window is selected as a function of the last measured electrical period and the rotational position of the motor.

REFERENCES:
patent: 5543697 (1996-08-01), Carobonlante et al.
patent: 5631999 (1997-05-01), Dinsmore
patent: 5744928 (1998-04-01), Tang et al.
patent: 5767654 (1998-06-01), Menegoli et al.
patent: 5789895 (1998-08-01), Lee
patent: 5898283 (1999-04-01), Bennett
patent: 5969491 (1999-10-01), Viti et al.
patent: 6023137 (2000-02-01), Kumar et al.
patent: 6252362 (2001-06-01), White et al.
patent: 6285521 (2001-09-01), Hussein
patent: 6420847 (2002-07-01), Galbiati et al.
patent: 6498446 (2002-12-01), Menegoli et al.
patent: 6515443 (2003-02-01), Kelly et al.
patent: 6555977 (2003-04-01), Du et al.
patent: 6580236 (2003-06-01), Mitsuda
patent: 6667598 (2003-12-01), Shimohara
patent: 6710568 (2004-03-01), Fujii
patent: 6754151 (2004-06-01), Watt
patent: 6901212 (2005-05-01), Masino
patent: 6906485 (2005-06-01), Hussein
patent: 2003/0085682 (2003-05-01), Hussein

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