Eddy current servo system for controlling the rotation of disk p

Details Eddy current servo system for controlling the rotation of disk p Eddy current servo system for controlling the rotation of disk p

1980-07-31

1982-10-19

Truhe, J. V.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Synchronizing or phasing control

318303, 318314, H02P 774

Patent

active

043552668

ABSTRACT:
A servo system provides phase locked servo control of the rotational speed and phase of one, two, or more, disk packs by operating the disk pack, or packs, approximately 2% faster than desired, and then applying a control current to an existing eddy current brake in the disk pack via a servo circuit to reduce the speed to that desired. The servo circuit regulates the servo control current to the brake via two loops; a phase loop which establishes a pack position relative to an external reference pulse, and a velocity loop which provides compensation to enhance lock-up time and improve overall stability. The summed outputs of both loops provide a composite error signal corresponding to the servo control current.

REFERENCES:
patent: 2281954 (1942-05-01), Rinia
patent: 3268788 (1966-08-01), Branco
patent: 3629633 (1971-12-01), O'Callaghan
patent: 3828168 (1974-08-01), O'Callaghan et al.
patent: 4203046 (1980-05-01), Homann et al.

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