Stepping motor driving device

Details Stepping motor driving device Stepping motor driving device

1989-07-06

1991-01-01

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

049821466

ABSTRACT:
A schedule driving device drives a polyphase stepping motor via a drive circuit that supplies phase currents to the motor for moving the read/write head of a disk storage device. Phase data provided to the driving circuit is switched with the actual movement of a movable piece of the stepping motor. A position encoder coupled to the motor or a magnetic sensor generates a detection signal representing the position of the movable piece of the stepping motor. A programmed microcomputer then switches the phase data according to timing data stored in the microcomputer memory synchronized with the detection signal.

REFERENCES:
patent: 4477757 (1984-10-01), Palombo et al.
patent: 4489259 (1984-12-01), White et al.
patent: 4518904 (1985-05-01), MacLeod et al.
patent: 4540927 (1985-09-01), Tanimoto
patent: 4555653 (1985-11-01), Nowata et al.

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