Stepping motor driving apparatus having small time constant rege

Details Stepping motor driving apparatus having small time constant rege Stepping motor driving apparatus having small time constant rege

1998-04-28

2000-09-05

Martin, David

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, 318254, G05B 1940

Patent

active

061148261

ABSTRACT:
In an apparatus for driving a stepping motor in a micro step manner by a PWM control signal generated based on a sense voltage, including a sense resistor for generating the sense voltage, a driving current path including the sense resistor and the stepping motor is provided and is operated so that a driving current flows through the stepping motor, when the PWM control signal is activated. A regenerative current path including the sense resistor and is provided the stepping motor and is operated so that a regenerative current flows through the stepping motor, when the PWM control signal is not activated. A resistance of the regenerative current path is larger than a resistance of the driving current path.

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