Semiconductor circuit for speed control of electric motors

Details Semiconductor circuit for speed control of electric motors Semiconductor circuit for speed control of electric motors

1979-07-03

1982-01-19

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318314, 318318, 318341, H02P 516

Patent

active

043119492

ABSTRACT:
A digital control loop is provided in which analog signals supplied by a tachometer, driven by an electric motor, are digitally evaluated, that is are compared with a reference value existing in digital form, and a deviation from the reference is employed for controlling the adjustment of an element, a thyristor preferably a triac, by way of an adjusting value generator which is likewise designed as a digital circuit. The speed control regulator can be designed both with an integral control behavior, and a differential control behavior, as well as being designed with a proportional control behavior and combinations thereof.

REFERENCES:
patent: 3740633 (1973-06-01), Buttafava
patent: 4025837 (1977-05-01), Meier et al.
patent: 4054820 (1977-10-01), Foster
patent: 4063146 (1977-12-01), Oliver
patent: 4066941 (1978-01-01), Foster et al.
patent: 4104570 (1978-08-01), Hamby et al.
patent: 4130785 (1978-12-01), Penet
A. Dosch et al., "Elektronik", Elektronische Drehzahlregelung bie Elektrowerkzugen (Electronic Speed Control in Electric Tools) 23, No. 1/1974 pp. 9-12.
B. R. Best, "Theorie und Anwendungen des Phase-Locked Loops" Published in Der Elektroniker (1975/1976) No. 7 pp. EL26-EL32.
Bose et al., "Digital Speed Control of a D.C. Motor with Phase-Locked Loop Regulation", Proc. Industrial Electronics and Control Instrumentation, 3-77.
Lin et al. "A Microprocessor Speed Control System" Proceedings, Industrial Elec. & Control Instrumentation Mar. 1977 pp. 144-151.

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