Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 38, Issue 7, Pages 7964-7970Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2023.3247643
Keywords
Asymmetric modulation; three-phase current-source rectifier (3ph-CSR); voltage stress
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In this letter, an improved asymmetric modulation is proposed to suppress the CM noise in high power density three-phase current-source rectifiers. The experimental results of a 1 kW prototype verify the effectiveness of the proposed method in reducing voltage stress on the switching devices.
Common-mode (CM) filters are usually utilized in high power density three-phase current-source rectifier (3ph-CSR) to suppress the CM noise in the input currents. However, when CM filters are utilized, the inductor currents at the positive and negative ends of the dc side of 3ph-CSR are unequal, which brings high voltage stress on switching devices. To reduce the voltage stress on the switching devices, an improved asymmetric modulation is proposed in this letter. In the proposed asymmetric modulation, two switching devices are always turned ON in each sector, which clamps the voltage of the switching devices to the peak of the input line voltages. A 1 kW experimental prototype of the 3ph-CSR is built to verify the analysis results.
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