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    • Comparative Analysis of Power Losses in Different PWM Techniques for a Three-Phase Voltage Source Inverter

    Yaohui Gai,Richard McMahon, Xiaoyan Wang

    13th International Conference on Power Electronics, Machines and Drives (PEMD 2024)（2024）

    Warwick Manufacturing Group (WMG)

    Cited 0|Views3
    Abstract
    This paper presents a comprehensive analysis of pulse-width modulation (PWM) techniques, specifically space-vector PWM (SVPWM) and discontinuous PWM (DPWM), in the context of improving inverter efficiency in electric vehicle systems. The study focuses on quantitatively comparing inverter losses and total harmonic distortion (THD) between SVPWM and DPWM using a three-phase two-level voltage source converter. Various DPWM strategies are investigated for their effectiveness in reducing switching losses and their impact on waveform characteristics. The analysis is conducted through both simulation and experimental setups, utilizing a commercially available IGBT voltage source inverter and a dSPACE 1104 controller board. The results highlight the trade-offs between conduction and switching losses, the impact of modulation index and switching frequency on inverter performance, and the influence of PWM techniques on THD. SVPWM is noted for its lower THD values and consistent performance, while DPWM demonstrates advantages in minimizing switching losses, especially at higher frequencies. This study provides insights into selecting appropriate PWM methods for electric vehicle applications, balancing efficiency, waveform quality, and power density.
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