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Optimized Synchronous Pulse Width Modulation Strategy Based on Discontinuous Carriers

Author

Listed:
  • Xuefeng Jin

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Jiahao Liu

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Wei Chen

    (School of Electrical Engineering, Tiangong University, Tianjin 300387, China)

  • Tingna Shi

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

This article proposes a new technique called optimized discontinuous carrier pulse width modulation (ODCPWM), whose main objective is to solve the issue of significant output voltage harmonics of conventional synchronous carrier modulation at low carrier wave ratios. Based on the symmetry principle, the fundamental wave period is divided into regions; the carriers in adjacent regions are flipped, and the carrier width is changed symmetrically in each region to generate an unequal-width optimized discontinuous carrier pulse width modulation. In addition, using the weighted total harmonic distortion (WTHD) of the line voltage as an evaluation index, an optimized multi-mode PWM strategy is proposed to satisfy the system to operate stably in the whole speed range. The experimental results verify the effectiveness of the proposed strategy. The results show that ODCPWM proposed in this article can eliminate harmonics and multiples of three harmonics in line voltage harmonics. The V WTHD is lower, which improves the quality of the output waveform and makes the system operation more stable and reliable. The proposed multi-mode PWM strategy is smooth and shock-free during switching.

Suggested Citation

  • Xuefeng Jin & Jiahao Liu & Wei Chen & Tingna Shi, 2023. "Optimized Synchronous Pulse Width Modulation Strategy Based on Discontinuous Carriers," Energies, MDPI, vol. 16(5), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2401-:d:1085860
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    References listed on IDEAS

    as
    1. Anatolii Tcai & Ibrahim Mohd Alsofyani & In-Yong Seo & Kyo-Beum Lee, 2018. "DC-link Ripple Reduction in a DPWM-Based Two-Level VSI," Energies, MDPI, vol. 11(11), pages 1-16, November.
    2. Subramanian Vasantharaj & Vairavasundaram Indragandhi & Mohan Bharathidasan & Belqasem Aljafari, 2022. "Power Quality Analysis of a Hybrid Microgrid-Based SVM Inverter-Fed Induction Motor Drive with Modulation Index Diversification," Energies, MDPI, vol. 15(21), pages 1-21, October.
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