Phase Fired Controllers
Phase control (PFC), also called phase cutting, is a method of pulse width modulation (PWM) for power limiting, applied to AC voltages. It works by modulating a thyristor, SCR, triac, thyratron, or other such gated diode-like devices into and out of conduction at a predetermined phase of the applied waveform.
Read more about Phase Fired Controllers: Overview
Famous quotes containing the words phase and/or fired:
“This is certainly not the place for a discourse about what festivals are for. Discussions on this theme were plentiful during that phase of preparation and on the whole were fruitless. My experience is that discussion is fruitless. What sets forth and demonstrates is the sight of events in action, is living through these events and understanding them.”
—Doris Lessing (b. 1919)
“And you’re too fired up to go to sleep, you sit at the kitchen table. It’s really late, it’s really quiet, you’re tired. Don’t wanna go to bed, though. Going to bed means this was the day. This Feb. 12, this Aug. 3, this Nov. 20 is over and you’re tired and you made some money but it didn’t happen, nothing happened. You got through it and a whole day of your life is over. And all it is—is time to go to bed.”
—Claudia Shear, U.S. author. New York Times, p. A21 (September 29, 1993)