Stepper motor controller used in a document reading device

Details Stepper motor controller used in a document reading device Stepper motor controller used in a document reading device

1997-07-09

1999-10-05

Ip, Paul

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, H02K 3700

Patent

active

059630043

ABSTRACT:
A stepper motor controller that controls acceleration of a stepper motor so that, once the stepper motor is stabilized at 500 pps, acceleration of the motor is increased to 667 pps for four steps, during which time the speed of the stepper motor reaches about 900 pps. Then, acceleration of the stepper motor is increased to 1,000 pps, allowing the motor to increase to that speed without degeneration of the speed. In other words, when the stopper motor nears the maximum possible speed at an acceleration of 667 pps, the next acceleration is applied. In this way, acceleration of the stepper motor can be changed between levels having a great difference in driving frequency without causing the stepper motor to degenerate.

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patent: 5554916 (1996-09-01), Kaneda et al.
patent: 5726754 (1998-03-01), Andrews et al.

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