Method and device for feeding a single-phase stepping motor

Details Method and device for feeding a single-phase stepping motor Method and device for feeding a single-phase stepping motor

1997-01-28

1998-06-30

Miska, Vit W.

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

318696, G06F 104, H02P 140

Patent

active

057744262

ABSTRACT:
The method and the device for feeding a single-phase stepping motor for a timepiece are adapted to provide the motor (M) with a sequence of chopped voltage pulses of variable duration as a function of load conditions and of feed voltage. The sequence of chopped voltage pulses comprises in particular a supplementary sequence of partial voltage pulses of constant duration (T.sub.4), separated from each other by variable intervals (T.sub.5i) defined by a reference current (I.sub.ref) whose value is adapted as a function of the level of load of the motor.

REFERENCES:
patent: 4346463 (1982-08-01), Tu Xuan et al.
patent: 4542329 (1985-09-01), Tu Xuan
patent: 5038329 (1991-08-01), Kawamura
patent: 5195063 (1993-03-01), Moriya
patent: 5247235 (1993-09-01), Tu et al.

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