Braking system for loaded stepping motor

Details Braking system for loaded stepping motor Braking system for loaded stepping motor

1978-12-20

1980-08-19

Dobeck, B.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, G05B 1940

Patent

active

042186439

ABSTRACT:
A braking system for an electrical stepping motor having its rotor mechanically connected to drive a transducer carriage of a magnetic disk drive machine, the braking system including a transistor which is responsive to the voltage across the stator coils of the stepping motor and initiates the controlled discharging of a capacitor. The charge on the capacitor is effective through transistor control circuits so as to short all of the stator coils, with the exception of the one to which an energizing voltage is applied for locating the rotor in its target position, when the capacitor discharges in a predetermined time so as to brake the rotor as the rotor approaches its target position on a return movement after the rotor initially passes across its target position.

REFERENCES:
patent: 3660746 (1972-05-01), Milek
patent: 3849714 (1974-11-01), Goreczki et al.
patent: 3967179 (1976-06-01), Loyzim
patent: 4151448 (1979-04-01), Azuma

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