Electromagnetic actuator drive circuit

Details Electromagnetic actuator drive circuit Electromagnetic actuator drive circuit

1997-01-23

2000-09-12

Loomis, Paul

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7716, 360 7812, G11B 555

Patent

active

061186139

ABSTRACT:
An electromagnetic actuator drive circuit suppresses mechanical resonance which occurs in a magnetic head or an optical device whose position is controlled and giving a very small displacement to an electromagnetic actuator. By feeding back the terminal voltage E of the electromagnetic actuator to the signal current I.sub.s of the electromagnetic actuator through a feedback circuit, a Q factor in the case where short-circuit control is performed by voltage drive is realized so as to be about 0.5 which is the size of critical damping. The actuator drive circuit is applied for improving the picture quality reproduced by a video tape recorder, a projection image display, or the like and is capable of enhancing the ability to damp a moving object such as a magnetic head by performing short-circuit control by voltage drive.

REFERENCES:
patent: 4350964 (1982-09-01), Chambers
patent: 4471278 (1984-09-01), Matouka
patent: 4970611 (1990-11-01), Kodama et al.
patent: 5001770 (1991-03-01), Losic et al.
patent: 5327308 (1994-07-01), Hanson
patent: 5499143 (1996-03-01), Sakamoto et al.
patent: 5566369 (1996-10-01), Carobolante
Dynamic Tracking System Using Moving Coil Actuators for a Consumer VCR, Masanori Kojima et al, 009 3063/94 1994 IEEE, pp. 969-975.
G. Fraser;Velocity Profile Compensator; IBM tech Disclosure Bulletin; vol. 18, #9, p. 3054, Feb. 1976.

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