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An DPWM for Active DC-Link Type Quasi-Z-Source Inverter to Reduce Component Voltage Rating

Author

Listed:
  • Duc-Tri Do

    (Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 700000, Vietnam)

  • Vinh-Thanh Tran

    (Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 700000, Vietnam)

  • Khai Nguyen

    (Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 700000, Vietnam)

Abstract

The conventional DC-link type quasi-Z-source inverter has been known as a buck–boost inverter with a low component voltage rating. This paper proposes an active DC-link type quasi-Z-source inverter by adding one active switch and one diode to the impedance-source network to enhance the voltage gain of the inverter. As a result, the component voltage rating of the inverter is significantly reduced, which is demonstrated through some comparisons between the proposed topology and others. A discontinuous pulse width modulation (DPWM) scheme is proposed to control the inverter, which reduces the number of commutations compared to the traditional strategy. Under this approach, the insertion of a shoot-through state does not cause any extra commutations compared to the conventional voltage-source inverter. Details about control implementation, steady-state analysis, and design guidelines are also presented in this paper. Simulation and a laboratory prototype have been built to test the proposed inverter. Both buck and boost operations of the proposed inverter are implemented to validate the performance of the inverter.

Suggested Citation

  • Duc-Tri Do & Vinh-Thanh Tran & Khai Nguyen, 2022. "An DPWM for Active DC-Link Type Quasi-Z-Source Inverter to Reduce Component Voltage Rating," Energies, MDPI, vol. 15(13), pages 1-18, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4889-:d:855183
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