Motor control apparatus effecting phase control on rotating body

Details Motor control apparatus effecting phase control on rotating body Motor control apparatus effecting phase control on rotating body

1986-12-02

1989-02-07

Faber, Alan

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

318314, 318318, 360 7303, H04N 5781, G11B 1920

Patent

active

048035688

ABSTRACT:
A motor control apparatus includes a driving unit having a motor for rotating a body at a predetermined rotating speed; a reference position detecting unit for determining a reference position in a rotation of the body and for generating a phase signal representing the reference position; a phase controller for controlling the driving unit by use of the bias signal as a reference so that a generation of the phase signal causes the rotation of the body to be brought within a predetermined range with respect to a reference signal; and a bias control unit interconnected to the phase controller for determining a difference in phase of the phase signal from the reference signal to provide the phase controller with the bias signal according to the determined difference.

REFERENCES:
patent: 4542423 (1985-09-01), Kotoke
patent: 4570188 (1986-02-01), Ichiyanogi
patent: 4647828 (1987-03-01), Wachi

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