A Single-Phase Soft-Switching Unipolar PWM Rectifier

Abstract:

This paper proposed a novel single-phase soft-switching unipolar PWM rectifier (SSUPR) using a simple auxiliary resonant unit. All main switches of high-frequency arm operate at zero-voltage-switching (ZVS) turn-on, while the auxiliary switches operate at zero-current-switching (ZCS) turn-off. All main switches of low-frequency arm operate at 60 Hz to greatly reduce switching losses. Moreover, a soft-switching unipolar PWM strategy is used for the proposed soft-switching rectifier. This strategy results in a better input current waveform than for the bipolar PWM strategy. Furthermore, the proposed rectifier achieves a near unity power factor, a sinusoidal input current and a bidirectional power flow capability. Some experimental results of the proposed SSUPR, rated 500 W and operated at 40 kHz, are presented for verification.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 2439-2444
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.2439
• Online since: January 2013
• Authors: Maoh Chin Jiang, Huang Kai Fu, Kao Yi Lu
• Keywords: Unipolar PWM Rectifier, Zero Voltage Switching (ZVS), Zero-Current-Switching (ZCS)

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