Stepping motor controller

Details Stepping motor controller Stepping motor controller

1982-10-04

1985-04-09

Shoop, William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02K 2904

Patent

active

045102660

ABSTRACT:
Pulses from a fixed-frequency pulse generator are counted in a pulse counter to produce a binary number. The binary number is employed to access successive memory addresses which contain data for producing drive pulses for a stepping motor. The memory contents are arranged so that the number of pulses from the pulse generator required to produce a drive pulse decreases during starting and increases during stopping so that smooth acceleration and deceleration of the stepping motor are achieved. In one embodiment, successive locations store "0" or "1" to produce a motor drive signal. In another embodiment, successive locations store numbers which control the length of time until the next drive signal is produced.

REFERENCES:
patent: 3990014 (1976-11-01), Hakozaki
patent: 4140956 (1979-02-01), Pritchard
patent: 4145644 (1979-03-01), Liu
patent: 4280199 (1981-07-01), Osakabe et al.
patent: 4322827 (1982-03-01), Weber

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