Device for controlling speed

Details Device for controlling speed Device for controlling speed

1980-05-21

1982-06-15

Smith, Jr., David

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318314, 318318, 318341, 242 755, H02P 516

Patent

active

043353363

ABSTRACT:
A function generator (25) receives the signal (svm) representing the speed of rotation of a motor (13) and works out EN=CN+f (vm), f (vm) being a single-valued and monotonic function of the real speed vm of the motor and CN being worked out by computer means (24) so that: CN=EN-f (VM), VM being the nominal value of the speed of rotation of the motor. The latter is fed by a signal which is a function of EN. The reference information f (VM)=IC is worked out from an item of error information which is a function of the deviation between the real speed (vb) and reference speed (vp) of a tape (10) driven by the motor, the rate of variation of IC having a maximum value limited in absolute value.
The device is suitable for subordinating the rate of travel of a tape carrying sound to the frequency of a pilot signal.

REFERENCES:
patent: 3137767 (1964-06-01), Axon et al.
patent: 3836756 (1974-09-01), Yammoto et al.
patent: 3950682 (1976-04-01), Dohanich, Jr.
patent: 4025837 (1977-05-01), Meier et al.
patent: 4242619 (1980-12-01), Nakamura et al.
Lin et al., "A Microprocessor Speed Control", IECI '77 Proceedings, Mar. 21-23, 1977, pp. 144-151.
Burger et al., "A Microprocessor Driven Digital Servo System", IECI '77 Proceedings, Mar. 21--23, 1976, pp. 159-163.

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