Position detector for a stepping motor

Details Position detector for a stepping motor Position detector for a stepping motor

1982-03-15

1984-08-21

Dobeck, B.

Electricity: motive power systems

Open-loop stepping motor control systems

368157, G05B 1940

Patent

active

044672551

ABSTRACT:
The invention provides a feed arrangement enabling the detection of the rr position of a stepping motor in relation to polarity of the motor pulses and to apply a series of long duration pulses should the polarity be considered to be wrong. The detector includes means for sampling the induced voltage generated by the motor at a predetermined moment the motor being then open circuited, comparing said voltage with a reference signal and using the result of the comparison to determine whether or not the long duration pulses should be applied to the motor. The invention is intended for use with micromotors as used in timepieces.

REFERENCES:
patent: 3475667 (1969-10-01), Newell
patent: 4032827 (1977-06-01), Dobratz
patent: 4205262 (1980-05-01), Shida
patent: 4208868 (1980-06-01), Regneir
patent: 4241433 (1980-12-01), Ueda et al.
patent: 4274150 (1981-06-01), Ikenishi et al.
patent: 4346463 (1982-08-01), Tu Xuan et al.
patent: 4361410 (1982-11-01), Nakajima
patent: 4370065 (1983-01-01), Kawamura et al.
patent: 4371821 (1983-02-01), Laesser et al.

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