Stepping motor control device and method thereof and timepiece

Details Stepping motor control device and method thereof and timepiece Stepping motor control device and method thereof and timepiece

1998-02-06

2000-08-22

Miska, Vit

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

318696, G04F 500, H02P 800

Patent

active

061082791

ABSTRACT:
A device for controlling a stepping motor including a first drive pulse supply unit for supplying a first drive pulse to a drive coil for rotating a rotor. A rotation detecting pulse supply part supplies a rotation detecting pulse for detecting whether the rotor has rotated. An auxiliary pulse supply part supplies an auxiliary pulse having an effective power that is greater than the first drive pulse. A level adjustment pulse supply part reduces the effective power of the first drive decrements pulse after the rotor has rotated for a predetermined number of times consecutively. A second drive pulse supply part supplies a second drive pulse for a second predetermined number of time after the auxiliary pulse is supplied.

REFERENCES:
patent: 5550795 (1996-08-01), Takakura et al.
patent: 5889734 (1999-03-01), Sato
patent: 5933392 (1999-08-01), Sato et al.

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