Circuit and method for controlling motor

Details Circuit and method for controlling motor Circuit and method for controlling motor

2006-03-03

2008-10-07

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Positional servo systems

C318S685000, C318S696000, C369S047100, C369S044280

Reexamination Certificate

active

07432680

ABSTRACT:
A motor control circuit for reducing current consumption. A stepping motor control circuit includes an A/B phase current setting signal generation circuit for generating an A/B phase current signal setting signals provided to a stepping motor driver to supply a stepping motor with a predetermined amount of drive current. Based on a switch signal, first and second switches selectively output an A/B phase current setting signal and an A/B phase reference signal, for reducing the drive current of the stepping motor more than the A/B phase current setting signal. An intermittent drive control circuit generates the switch signal. The stepping motor control circuit provides the motor driver with the A/B phase reference signal in accordance with the switch signal.

REFERENCES:
patent: 6122234 (2000-09-01), Fujitani et al.
patent: 6555985 (2003-04-01), Kawabata et al.
patent: 6577094 (2003-06-01), Ohtsu et al.

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