Method and apparatus for driving stepping motor

Details Method and apparatus for driving stepping motor Method and apparatus for driving stepping motor

1990-06-07

1991-10-22

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

050598830

ABSTRACT:
A drive apparatus is disclosed which is designed to switch/excite a plurality of excitation windings of a stepping motor in a predetermined order. Periodic velocity fluctuation data of the stepping motor is stored in a memory unit in advance. An arithmetic unit reads out the velocity fluctuation data stored in the memory unit. The arithmetic unit outputs a pulse train whose pulse rate fluctuates to have a phase opposite to that of velocity fluctuation obtained from the velocity fluctuation data. This pulse train is used as switching timing signals for switching/exciting the plurality of excitation windings in a predetermined order.

REFERENCES:
patent: 4081736 (1978-03-01), Leenhouts
patent: 4091316 (1978-05-01), Friedman
patent: 4219767 (1980-08-01), Wimmer
patent: 4220904 (1980-09-01), Leenhouts et al.
patent: 4540928 (1985-09-01), Marhoefer
patent: 4673855 (1987-06-01), Boillst
patent: 4683409 (1987-07-01), Boillst

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