Control circuit for stepping motor

Details Control circuit for stepping motor Control circuit for stepping motor

1985-12-18

1987-06-09

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

046722831

ABSTRACT:
A control circuit can drive a stepping motor within a wide supply voltage range without step-out of the rotor. The control circuit includes an A/D converter for converting the supply voltage to the stepping motor into a digital data and a register for temporarily storing the number of steps by which the stepping motor is rotated. The control circuit also includes a memory having a plurality of storage areas in each of which a plurality of speed pattern data are stored, the plurality of speed pattern data corresponding respectively to different levels of the supply voltage. One of the plurality of speed pattern data is selectively read in accordance with the output of the A/D converter from the storage areas which corresponds to the number of the steps. And, the stepping motor is driven in accordance with the read speed pattern data.

REFERENCES:
patent: 4220995 (1980-09-01), Shoda

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