Disk storage drive

Details Disk storage drive Disk storage drive

1982-03-01

1984-03-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360102, 360133, 318138, 310 49R, G11B 5012

Patent

active

044385420

ABSTRACT:
A motor for direct or coaxial drive of a disc storage, mounted in a center hole formed in a storage disc includes a rotor and a stator which form together with an air gap separating the rotor from the stator a magnetic circuit. The stator has a single-phase winding. The motor produces an auxiliary reluctance moment complementing the electromagnetic torque produced by the winding and being offset in time relative to the electromagnetic torque. Due to the positioning of the motor within the center hole of the disc a very compact construction is obtained.

REFERENCES:
patent: 3840761 (1974-10-01), Muller
patent: 3873897 (1975-03-01), Muller
patent: 4005490 (1977-01-01), Duncan et al.
patent: 4101945 (1978-07-01), Butsch
patent: 4150406 (1979-04-01), Stollorz
patent: 4185308 (1980-01-01), Fujioka
patent: 4216512 (1980-08-01), Vidwans

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