Individual Loss Reduction Technique for Each Phase in Three-Phase Voltage Source Rectifier Based on Carrier-Based Pulse-Width Modulation

초록

This paper presents a carrier-based pulse-width modulation method for voltage source rectifiers for individual phase loss reduction. Due to the reduction of switching frequency in the three-phase legs of the converter might significantly deteriorate the output performance, the proposed strategy aims at the most aged leg of the converter. The proposed individual phase loss reduction method modifies the creation of the offset voltage and chooses an appropriate offset voltage to generate the modulation voltage that only lowers the switching frequency and switching loss of the most aged leg. Hence, the lifetime of the most aged leg and entire converter is extended, whereas the output performance of the converter is not degraded too much. To verify the accuracy and efficiency of the proposed approach in reducing the switching loss and providing satisfactory performance of the input/output waveforms, both simulation and experiment are conducted. © 2023, The Author(s) under exclusive licence to The Korean Institute of Electrical Engineers.

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