Disc drive spindle motor with log cogging torque

Details Disc drive spindle motor with log cogging torque Disc drive spindle motor with log cogging torque

1987-05-04

1989-07-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

310268, 318254, G11B 1700, H02K 300, H02P 700

Patent

active

048477125

ABSTRACT:
A spindle motor is adapted to support a hub with one or more discs thereon. The motor comprises a stator with nine windings of equal cross-section and a rotor with eight equally spaced poles radially oriented with respect to the stator. The rotor windings are connected to define first, second and third phases.

REFERENCES:
patent: 4528485 (1985-07-01), Boyd, Jr.
patent: 4535276 (1985-08-01), Yokobord
patent: 4605874 (1986-08-01), Whitellsy

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