Load torque detection and drive current optimization determinati

Details Load torque detection and drive current optimization determinati Load torque detection and drive current optimization determinati

1999-02-16

2000-11-21

Witkowski, Stanley J.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, 318439, G05B 1940

Patent

active

061507881

ABSTRACT:
The voltage at a node between a pair of series-connected windings of a synchronous or stepping motor is monitored during operation so as to detect transition voltage regions, the durations of which are indicative of the torque load on the motor and which are used as the basis for controlling the driving current amplitude so as to achieve enhanced efficiency of energy utilization. An optimum value for the duration of the transition voltage region will usually be established as a target, and adjustments will be so made as to conform subsequently detected node voltage values to those of the target.

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