Magnetic disk memory power supply

Details Magnetic disk memory power supply Magnetic disk memory power supply

1982-06-02

1985-06-18

Kilgore, Robert M.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

318696, 360106, 368 76, G11B 5012, G11B 545, G05B 1940, G04B 1900

Patent

active

045243999

ABSTRACT:
In a magnetic disk memory, a magnetic disk is driven by a DC motor having a permanent magnet rotor and a pair of stator windings sharing a common ground connection point. The windings are alternately energized from an electrical power source by a switching circuit which produces positive voltage pulses of predetermined duration across the windings. The negative emf induced in the windings between energizing pulses provides a source of regulated, negative DC voltage which may be used to power various components requiring such a supply.

REFERENCES:
patent: 4112345 (1978-09-01), Goddijn
patent: 4139877 (1979-02-01), Townsend
patent: 4238717 (1980-12-01), Knight
patent: 4313143 (1982-01-01), Zarr
patent: 4315290 (1982-02-01), Kukreja
patent: 4340946 (1982-07-01), Kanno

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