Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Patent
1993-09-14
1995-08-15
Shoop, Jr., William M.
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
318138, 318439, 318254, H02P 100
Patent
active
054422663
ABSTRACT:
Disclosed is a disk drive information storage device having a housing and a disk means for recording and reproducing information. The disk drive information storage device utilizes a spin motor control system having a start-up control circuit which includes a counter and is programmable to accommodate for changing system parameters. The start-up control circuit does not require an external capacitor and provides stable generation of the start-up pulses. The spin motor control system also includes a BEMF commutation circuit which operates utilizing digital techniques. The BEMF commutation circuit includes first and second counters that are programmable to accommodate for changing system parameters. In one embodiment, the housing has a first external dimension of about 51 mm. In another embodiment, the disk means has a diameter in the range of from about 45 mm to about 50 mm.
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Publication entitled "Quantum Low Power Products: Go Drive-2 1/2-inch Hard Disk Drives, ProDrive Gem Series-3 1/2-inch Small Frame Drives, Technical Highlights", Sep. 1990, pp. 1-5, Quantum Corp., 1804 McCarthy Blvd., Milpitas, Calif.
Brochure entitled "Quantum Go Drive Series" comprising three pages, date and the place of publication unknown.
Blagaila John H.
Morehouse James H.
Utenick Michael R.
Volk Steven B.
Heid David W.
Integral Peripherals, Inc.
Masih Karen
Shoop Jr. William M.
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