The paper presents a simple cell with a line-frequency commutated AC switch that is able to greatly improve both power factor and output voltage regulation of rectifiers with passive L-C filters. The boost action introduced by the commutation cell allows for the compensation of the voltage drop across the input filter inductor, so as output voltages higher than the peak of the line voltage can be achieved. Moreover, as compared to the linefrequency commutated boost rectifier, the proposed circuit allows compliance with the low-frequency harmonic standard EN 61000-3-2 with a lower filter inductance value, at output power levels greater than 1kW. A converter prototype was built and tested. Results are reported in order to confirm the theoretical analysis.
Single-Phase Rectifier with High Power Factor and Low-Frequency Switching
SPIAZZI, GIORGIO
2001
Abstract
The paper presents a simple cell with a line-frequency commutated AC switch that is able to greatly improve both power factor and output voltage regulation of rectifiers with passive L-C filters. The boost action introduced by the commutation cell allows for the compensation of the voltage drop across the input filter inductor, so as output voltages higher than the peak of the line voltage can be achieved. Moreover, as compared to the linefrequency commutated boost rectifier, the proposed circuit allows compliance with the low-frequency harmonic standard EN 61000-3-2 with a lower filter inductance value, at output power levels greater than 1kW. A converter prototype was built and tested. Results are reported in order to confirm the theoretical analysis.Pubblicazioni consigliate
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