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Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor

Author

Listed:
  • Qiang Guo

    (Energy Internet Engineering Research Center of Chongqing (Chongqing University of Technology), Chongqing 400054, China)

  • Zhiping Dong

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Heping Liu

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Xiaoyao You

    (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

Abstract

This paper proposes a scheme that can compensate for the nonlinear characteristics of voltage source inverters (VSIs) for low-voltage delta-connected induction motors (IMs). Due to the nonlinearity introduced by the dead-time, the on/off delay, and the voltage drop across the power device, the output voltage of VSIs is seriously distorted, causing distortion in the phase current of the IM, which will lead to output torque ripple. However, the existing compensation methods for three-phase VSIs are derived from star-connected loads, or ignore the conducting properties of power devices. Moreover, the current polarity detection near the current zero is quite complex. In this paper, by taking such nonlinear characteristics into consideration, especially the conducting property of metal-oxide-semiconductor field effect transistors (MOSFETs), an output voltage model of VSIs for low-voltage delta-connected induction motors is presented. After that, in view of the difficulty in detecting the line current polarity near the current zero which might lead to the wrong compensation, an advancing current crossing zero (ACCZ) compensation is proposed. Subsequently, a compensation scheme which combines the compensation based on the VSI output voltage model and ACCZ compensation is proposed. Finally, the proposed compensation scheme is implemented based on a digital signal processor (DSP) drive system. The experimental results show that the proposed scheme has better performance than the common method in terms of suppressing the effect of the nonlinear characteristics of VSI, which demonstrates that the proposed compensation scheme is feasible and effective for the compensation of the nonlinear characteristics of VSI for low-voltage delta-connected IMs.

Suggested Citation

  • Qiang Guo & Zhiping Dong & Heping Liu & Xiaoyao You, 2020. "Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor," Energies, MDPI, vol. 13(3), pages 1-13, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:590-:d:313635
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    Citations

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    Cited by:

    1. Bowen Zhang & Zaixin Song & Senyi Liu & Rundong Huang & Chunhua Liu, 2022. "Overview of Integrated Electric Motor Drives: Opportunities and Challenges," Energies, MDPI, vol. 15(21), pages 1-23, November.
    2. Zhiping Dong & Chunhua Liu & Senyi Liu & Zaixin Song, 2021. "Deadbeat Predictive Current Control for Series-Winding PMSM Drive with Half-Bridge Power Module-Based Inverter," Energies, MDPI, vol. 14(15), pages 1-16, July.

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