Stepping motor drive and a method of driving same

Details Stepping motor drive and a method of driving same Stepping motor drive and a method of driving same

1997-09-16

1999-07-27

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

G05B 1940

Patent

active

059295899

ABSTRACT:
The invention is related to a stepping motor drive and a driving method thereof and presents a technology to constantly monitor the phenomenon of step out during the operation of the motor and automatically bring into action a restarting circuit when a step out occurs so that said motor having stepped out may be able to automatically restart, wherein the stepping motor drive is provided with a starting instruction designed to start/stop the stepping motor, a speed sensor or an index sensor designed to detect the rotation speed of said motor, means to detect the rotation speed of said motor from the output of said speed sensor, a rotation speed detection means by detecting the difference of rotation speed with the rated rotation speed, a speed judgment means designed to output signals when the rotation speed of said motor has fallen below the set reference speed, and a restarting pattern generating means designed to automatically increase gradually frequency for a prescribed time from the pull-in frequency of said motor to the desired frequency.

REFERENCES:
patent: 4292577 (1981-09-01), Cesarz et al.
patent: 4580084 (1986-04-01), Takahashi et al.
patent: 5418436 (1995-05-01), Apuzzo
patent: 5541488 (1996-07-01), Bansal et al.

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