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<p>This article presented a novel silicon carbide (SiC)-based boost-packed nine-level (9L) bidirectional buck power factor correction (9L-BBPFC) rectifier, designed to optimize efficiency and enhance power quality. The operation of the proposed 9L-BBPFC topology significantly lessens the total harmonic distortion (THD) in the input current and mitigates voltage stress across switches. With its bidirectional power flow capability, the rectifier is well-suited for diverse DC-load applications, supporting both single and multiple loads, which may be identical or different loads. The series–parallel capacitor switching mechanism ensures automatic voltage balancing across varying load conditions, simplifying control strategy and improving system stability under dynamic operation with fewer sensors. Significantly, the rectifier exhibits fault-tolerant operation, maintaining consistent output power during open-circuit faults, comparable to its performance in healthy mode. Detailed analyses of modulation technique, control strategy, component ratings, power losses, and topology assessments are provided. Experimental validation is done with an&#xa0;experimental setup of 1.8&#xa0;kW, confirming the rectifier’s superior performance, achieving an optimal efficiency of 98.63%, a THD of 2.53%, and a unity power factor at rated condition. The results demonstrate that the proposed 9L-BBPFC rectifier is a highly efficient and reliable solution for PFC, offering robust operation even in fault conditions, and making it an attractive solution for modern power electronics systems.</p>

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A new SiC-based 1.8-kW 9-level buck PFC rectifier with single/multiple output capabilities for EV charging applications

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Srinu Ruttala,
  • Jayaram Nakka

摘要

This article presented a novel silicon carbide (SiC)-based boost-packed nine-level (9L) bidirectional buck power factor correction (9L-BBPFC) rectifier, designed to optimize efficiency and enhance power quality. The operation of the proposed 9L-BBPFC topology significantly lessens the total harmonic distortion (THD) in the input current and mitigates voltage stress across switches. With its bidirectional power flow capability, the rectifier is well-suited for diverse DC-load applications, supporting both single and multiple loads, which may be identical or different loads. The series–parallel capacitor switching mechanism ensures automatic voltage balancing across varying load conditions, simplifying control strategy and improving system stability under dynamic operation with fewer sensors. Significantly, the rectifier exhibits fault-tolerant operation, maintaining consistent output power during open-circuit faults, comparable to its performance in healthy mode. Detailed analyses of modulation technique, control strategy, component ratings, power losses, and topology assessments are provided. Experimental validation is done with an experimental setup of 1.8 kW, confirming the rectifier’s superior performance, achieving an optimal efficiency of 98.63%, a THD of 2.53%, and a unity power factor at rated condition. The results demonstrate that the proposed 9L-BBPFC rectifier is a highly efficient and reliable solution for PFC, offering robust operation even in fault conditions, and making it an attractive solution for modern power electronics systems.