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What is PWM control of inverters about?

This chapter focuses on the control of single-phase and three-phase voltage-source inverters that are widely used for the conversion of AC electrical energy. Switching power conversion principles are reminded, along with pulse-width modulation (PWM) control and its carrier-based implementation to generate reference voltages. Control of single-phase inverters is developed for the half-bridge and full-bridge topologies, with a focus on inverter states representation and the associated degrees of freedom. The analysis is extended to three-phase inverters through the vector diagram of inverter states and its link with carrier-based modulation. Zero-sequence injection is introduced as a means of maximizing voltage ratio capability, leading to the implementation of classical PWM strategies commonly applied with three-phase inverters. Associated optimizations and trade-off are discussed, showing that inverter control not only ensures the delivering of required AC voltages, but also determines various application parameters such as waveform quality or power losses.

Author

Arnaud Videt

Publisher

Elsevier

Published

2023

Language

EN

ISBN

9780128232118