Title :
Linear Pulsewidth Modulation Under Fluctuating Power Supply
Author :
Janakiraman, P.A. ; Abdul Rahman, S.
Author_Institution :
Mohamed Sathak A. J. Coll. of Eng., Chennai, India
Abstract :
Heavy fluctuations in the dc power supply cause large distortions, when the simple pulsewidth modulation technique is employed in inverters. The ripples in the dc supply may even be synchronous with the converted ac signal. To overcome this nonlinear distortion, a new carrier signal is generated by multiplying the triangular dither signal with the dc supply voltage, without changing the basic dither frequency. The modulator-demodulator characteristic becomes linear, thereby removing the distortion.
Keywords :
PWM invertors; demodulation; nonlinear distortion; switching convertors; PWM invertors; converted ac signal; dither frequency; fluctuating power supply; linear pulse width modulation; modulator-demodulator characteristic; nonlinear distortion; triangular dither signal; Demodulation; multiplier; nonlinear distortion; pulsewidth modulation (PWM); switching converters;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2013.2263776
