Frequency-modulated electric element control

Details Frequency-modulated electric element control Frequency-modulated electric element control

H - Electricity

05

B

H05B 1/02 (2006.01) D06F 39/04 (2006.01) D06F 58/26 (2006.01) F24C 7/06 (2006.01)

Patent

CA 2733874

A system, method, and computer-readable medium for controlling power applied to a heating element. A rectifier receives AC voltage supplied from an AC voltage supply and rectifies the AC voltage to DC voltage. A pulse-width modulation controller generates and transmits a pulse-width modulation signal, and a DC voltage modulator receives the DC voltage from the rectifier and the pulse-width modulation signal from the pulse-width modulation controller. Based on the pulse-width modulation signal, the DC voltage modulator supplies an analog DC voltage signal to the heating element. A feedback circuit reports the actual DC voltage applied to the heating element to a microcontroller and, if the actual DC voltage deviates from the DC voltage encoded in the pulse-width modulation signal, the pulse-width modulation controller modulates the pulse-width modulation signal to minimize or eliminate the deviation.

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