Pulse Width Modulation Techniques in Two-level Voltage Source Inverters – State of the Art and Future Perspectives
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Indian Institute of Engineering Science and Technology, Shibpur
Indian Institute of Technology Kharagpur
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Indian Institute of Engineering Science and Technology, Shibpur
Power Electronics and Drives 2023;8 (43)
The core of most power electronic systems, involving DC/AC conversion, is a voltage-source-inverter (VSI), running on some pulse-width-modulation (PWM) strategy. Numerous PWM techniques have been reported in the literature over the past few decades, each having its own merits and limitations. This paper reviews some selected areas of two-level PWM VSI, namely proper utilization of the DC-bus without deteriorating the quality of the output waveform, switching loss reduction in the linear and over-modulation zones, common mode voltage and PWM strategies for its reduction or elimination, distortion of the output voltage due to dead-time, and its compensation. These phenomena are explained in brief, followed by discussions on different research works relevant to these areas, their advantages and disadvantages. Finally, the paper shows prospective directions, in which research may continue in these areas in future.
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