Stepping motor driving circuit

Details Stepping motor driving circuit Stepping motor driving circuit

1992-03-16

1993-11-30

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, G05B 1940

Patent

active

052668797

ABSTRACT:
A stepping motor driving circuit comprising control means for controlling rotation of a stepping motor, driving means for supplying the stepping motor with a driving signal consisting of excitation pulses in accordance with rotation control, chopping means for executing intermittent chopping of the excitation pulse, and voltage monitoring means for monitoring fluctuation of driving voltage, wherein the control means has means for adjusting the intermittent chopping execution time by controlling the chopping means in accordance with the monitored driving voltage. The driving circuit can be applied to rotation control of the stepping motor mounted on a line printer as a paper feed driving source. In this case, the control means controls rotation of the stepping motor synchronously with the line printing speed of the line printer. To prevent bad influence due to decrease of effective voltage and execute high-speed step rotation at an interval shorter than delay time, normal driving is executed without execution of intermittent chopping and stable motor torque can be obtained.

REFERENCES:
patent: 4409530 (1983-10-01), Neeper et al.
patent: 4471283 (1984-09-01), Presley
patent: 4524399 (1985-06-01), Jepsen
patent: 4906910 (1990-03-01), Tanuma et al.
patent: 4983891 (1991-01-01), Sekimoto

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