Title :
Triac phase control with a line-frequency control signal
Author :
Diamond, Joseph M.
Author_Institution :
Polytechnic Institute of Brooklyn, Department of Electrical Engineering, Brooklyn, USA
fDate :
1/1/1971 12:00:00 AM
Abstract :
A triac control circuit is presented which provides continuous (phase) control in response to the amplitude of a sine-wave signal of line frequency. Such signals might be obtained from a variety of a.c. transducers; e.g. from a resistance thermometer in a line-frequency bridge. A negative-resistance circuit is used which increases the control voltage exponentially to the trigger level for small signals. General curves are presented for conduction angle and power output as a function of signal amplitude.
Keywords :
control systems; phase control; thyristors; conduction angle and power output curves; exponential control voltages for triggering; line frequency control signals; negative resistance circuit; resistive thermometers; signal amplitude functions of control circuit; triac phase control circuit; trigger levels for small signals;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1971.0019
