Bi-directional motor drive servo

Details Bi-directional motor drive servo Bi-directional motor drive servo

1976-05-26

1978-02-07

Dobeck, B.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318 6, 318341, 318599, G05B 1128

Patent

active

040728838

ABSTRACT:
A reel motor drive system using a first and a second signal for comparing an error signal derived from a tape tension sensing transducer with a respective polarity of separate positive and negative repetitive ramp signals. Each comparator produces an output signal as a series of constant frequency, duty cycle modulated pulses having a duration equal to the time that the error signal is greater than the ramp signal being compared thereto. These pulses are used as drive signals to a reel motor through a motor power amplifier and are used to develop mutually exclusive steering signals for selecting a motor drive direction by means of a steering logic circuit. The steering signals are also applied to the motor power amplifier to select a current path through the reel motor corresponding to the desired motor drive direction.

REFERENCES:
patent: 3105179 (1963-09-01), Young et al.
patent: 3260912 (1966-07-01), Gregory
patent: 3437826 (1969-04-01), Kelley
patent: 3560829 (1971-02-01), Brennan
patent: 3582750 (1971-06-01), Halfhill
patent: 3719878 (1973-03-01), Ferguson

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