Dynamic brake control for a tape drive system

Details Dynamic brake control for a tape drive system Dynamic brake control for a tape drive system

1986-12-22

1988-08-30

Ro, Bentsu

Electricity: motive power systems

Braking

Dynamic braking

318 60, 318261, 318364, 318379, H02P 312

Patent

active

047679700

ABSTRACT:
In a tape drive system, a dynamic brake control circuit provides dynamic braking for slowing and stopping an associated tape reel and motor system in the event of a power failure. Upon sensing a power failure, the electrical energy stored in a capacitor supplies electrical energy to enable the control circuit, which in turn supplies a controlled conductive path for the flow of a dynamic braking current due to the back electromotive force signal generated by the motor, to effect the controlled dynamic braking of the drive motor to a stop.

REFERENCES:
patent: 3755712 (1973-08-01), De Viney et al.
patent: 4195255 (1980-03-01), Guttmann
patent: 4374352 (1983-02-01), Webster
patent: 4481449 (1984-11-01), Rodal
ATR-100 Series Recorder/Reproducer vol. 1, Operation and Maintenance, Ampex Corp. pp. 4-16 and 4-17, Jul. 1980.
ATR-116/124 Multichannel Recorder/Reproducer Service Manual, Ampex Corp. pp. 4-26 and 4-27, Jul. 1983.

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