Speed detection apparatus, speed control motor, and track jump c

Details Speed detection apparatus, speed control motor, and track jump c Speed detection apparatus, speed control motor, and track jump c

1997-08-15

1998-12-01

Ro, Bentsu

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

324179, G01P 344, H02P 606

Patent

active

058443959

ABSTRACT:
A track jump control circuit includes: a head; a rotary motor which drives the head and is controlled in accordance with an input signal; a unit for detecting a speed of rotation corresponding to the rotation of the rotary motor; distance detection unit for producing a signal corresponding to a distance which the head should move with using no data read by the head when the head is moved to a desired position; speed setting unit for setting a speed of movement of the head based on the signal produced by the distance detection unit; and a unit for comparing a speed detected by the speed detection unit with a speed set by the speed setting unit to produce an output as the input signal to the rotary motor.

REFERENCES:
patent: 3937974 (1976-02-01), Lafuze
patent: 4546294 (1985-10-01), Ban et al.
patent: 4633150 (1986-12-01), Inaji et al.
patent: 4645991 (1987-02-01), Ban et al.
patent: 4658190 (1987-04-01), Miyazaki et al.
patent: 4710683 (1987-12-01), Bahn et al.

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