Motor driving apparatus

Details Motor driving apparatus Motor driving apparatus

1996-02-08

1999-02-09

Cabeca, John W.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318293, 388811, H02P 618

Patent

active

058699449

ABSTRACT:
A motor driving apparatus enabling direct pulse width modulation driving (direct PWM driving) in a sensor-less motor. The motor driving apparatus includes a comparison unit for comparing back-electromotive voltages appearing in respective phases of a multi-motor, a pulse width modulating unit for outputting pulse width modulated signals for rotationally driving the motor based upon a rotational error signal of the motor, a minimum pulse width detection unit for detecting the minimum pulse width position of the pulse width modulated signal from the pulse width modulation means, a sample-holding unit for sample-holding comparison outputs of the comparison means at a timing of detection of the minimum pulse width of the pulse width modulated signal from the minimum pulse width detection unit, and a motor driving unit for rotationally driving the motor based upon each sample-and-hold output from the sample-and hold unit.

REFERENCES:
patent: 4544868 (1985-10-01), Murty
patent: 4922161 (1990-05-01), Gilliland et al.
patent: 4928043 (1990-05-01), Plunkett
patent: 5172036 (1992-12-01), Cameron
patent: 5309078 (1994-05-01), Cameron
patent: 5350988 (1994-09-01), Le
patent: 5367234 (1994-11-01), Ditucci
patent: 5384527 (1995-01-01), Rozman et al.
patent: 5517095 (1996-05-01), Carobolante et al.

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