Movement detector for a stepping motor

Details Movement detector for a stepping motor Movement detector for a stepping motor

1980-08-27

1982-04-06

Dobeck, B.

Electricity: motive power systems

Open-loop stepping motor control systems

368 76, G05B 1940, G04C 300

Patent

active

043238343

ABSTRACT:
The invention provides a feed arrangement for a stepping motor which enables step detection and responsive to failure to step applies a series of wide (long duration) pulses in place of the normal short duration pulses. The detector includes sampling means for a first signal developed by the voltage induced in the motor winding during a predetermined period and there are means to generate a second signal which is the integral of the first signal, the amplitude of the second signal indicating whether or not the motor has stepped. The invention may find use with a timepiece micromotor.

REFERENCES:
patent: 4192131 (1980-03-01), Hosokawa et al.
patent: 4217751 (1980-08-01), Torisawa et al.
patent: 4241433 (1980-12-01), Ueda et al.
Actes Du 10e Congress International de Chronometrie, Sep. 11, 1979, Partie , Buren (CH), A. Pittet et al., "Amelioration de la Fiabilite et de la Consomation d'Energie de Moteurs Pas a Pas par une Technique d'Auto-Controle", pp. 73-80.

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