Apparatus for controlling the rotation of a rotating body in a r

Details Apparatus for controlling the rotation of a rotating body in a r Apparatus for controlling the rotation of a rotating body in a r

1973-08-01

1976-01-20

Konick, Bernard

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 75, 318314, 318327, G11B 2104, G11B 2102

Patent

active

039342697

ABSTRACT:
The invention provides an apparatus for controlling the rotation of a rotating body in a recording and/or reproducing apparatus. First, the apparatus detects the rotational speed of the rotating body, as it is driven by a DC motor. Detection is in terms of a frequency which is n times the speed, in which n>> 1. Second, there is a detection of the rotational phase of the rotating body. The DC motor is driven to rotate in accordance with a controlling signal obtained by using first and second output error signals responsive to the first and second detections. The DC motor is driven by means for superimposing an AC signal generated with a constant period and the first and second output error signals. The superimposed signals are sliced at a predetermined level to perform "ON" - "OFF" operations and a smooth output to control the driving rotation of the DC motor.

REFERENCES:
patent: 3086157 (1963-04-01), Branco
patent: 3152226 (1964-10-01), Stratton
patent: 3355649 (1967-11-01), Boylan
patent: 3356921 (1967-12-01), Bradford
patent: 3542949 (1970-11-01), Tanaka
patent: 3577056 (1971-05-01), Tsujikawa
patent: 3651276 (1972-03-01), Clark
patent: 3663764 (1972-05-01), Trost
patent: 3663884 (1972-05-01), Pattantyus
patent: 3686432 (1972-08-01), Deguchi

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