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A Switched-Capacitor-Based Quasi-H7 Inverter for Common-Mode Voltage Reduction

Author

Listed:
  • Thi-Thanh Nga Nguyen

    (Department of Automation, Thai Nguyen University of Technology (TNUT), 666, 3/2 Street, Tich Luong Ward, Thai Nguyen City 24132, Vietnam)

  • Tan-Tai Tran

    (Faculty of Electrical Engineering Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City 71700, Vietnam)

  • Minh-Duc Ngo

    (Department of Automation, Thai Nguyen University of Technology (TNUT), 666, 3/2 Street, Tich Luong Ward, Thai Nguyen City 24132, Vietnam)

  • Seon-Ju Ahn

    (Department of Electrical Engineering, Chonnam National University, Buk-gu, Gwangju 61186, Republic of Korea)

Abstract

This paper proposes a novel three-phase two-level DC-AC inverter with significantly reduced common-mode voltage. The proposed inverter combines a conventional three-phase H7 configuration with a voltage multiplier network, effectively doubling the DC-link voltage relative to the input. Compared to existing solutions, the topology achieves a remarkably low common-mode voltage, limited to only 16.6% of the DC-link voltage. Additionally, the voltage stress across the additional switches remains at half of the DC-link voltage. The paper details the operating principles, mathematical formulation, and circuit-level analysis of the proposed inverter. Simulation results are provided to validate its performance. Furthermore, a hardware prototype has been implemented using a DSP TMS320F28379D microcontroller manufactured by Texas Instruments, headquartered in Dallas, TX, USA in conjunction with an Altera Cyclone® IV EP4CE22F17C6N FPGA-based digital control platform manufactured by Intel Corporation, headquarters in Santa Clara, CA, USA. Experimental results are presented to confirm the effectiveness and feasibility of the proposed design.

Suggested Citation

  • Thi-Thanh Nga Nguyen & Tan-Tai Tran & Minh-Duc Ngo & Seon-Ju Ahn, 2025. "A Switched-Capacitor-Based Quasi-H7 Inverter for Common-Mode Voltage Reduction," Energies, MDPI, vol. 18(12), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:12:p:3218-:d:1682810
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    More about this item

    Keywords

    switched-capacitor network; common-mode voltage; H7 inverter; DC-AC inverter;
    All these keywords.

    JEL classification:

    • H7 - Public Economics - - State and Local Government; Intergovernmental Relations

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