Title :
Harmonic imbalance in asynchronous PWM schemes
Author :
Dunford, W.G. ; van Wyk, J.D.
Author_Institution :
Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada
Abstract :
The harmonic content, both integral and non-integral, of an asynchronous three-phase PWM scheme is analyzed. The effects of both quantization and blanking time are included. It has been shown that in a three-phase inverter with asynchronous modulation the nonintegral harmonic line currents produced form unbalanced sets. The percentage imbalance for a particular order is a function of the harmonic order only. For practical frequency ratios, the absolute amplitude of the current imbalance is small due to the small amplitude of the nonintegral components
Keywords :
harmonics; invertors; pulse width modulation; 3-phase invertor; asynchronous 3-phase PWM; blanking time; harmonic imbalance; nonintegral harmonic line currents; quantization time; Artificial intelligence; Blanking; Bridge circuits; Frequency; Harmonic analysis; Pulse modulation; Pulse width modulation; Pulse width modulation inverters; Quantization; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1991. PESC '91 Record., 22nd Annual IEEE
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-0090-4
DOI :
10.1109/PESC.1991.162705
