EMC aspects of PWM inverter fed AC motor drive system ab 58.99 € als Taschenbuch: Analysis Modeling Simulation and Experiments. Aus dem Bereich: Bücher, Wissenschaft, Physik,
PWM inverters are widely used in industrial, commercial and residential application such as motor drives. In three-leg inverters for three-phase applications the occurrence of common mode voltage is inherent due to asymmetrical output pulses. It has been found that the high dv/dt and high switching frequency together with the common mode voltages generated by PWM inverters have caused many adverse effects such as shaft voltage, bearing current, leakage current, motor terminal over voltage and electromagnetic interference (EMI). The EMI generated by such systems is increasingly causing concerns, as the electromagnetic compatibility (EMC) regulations become more stringent. In order to comply with these international EMC regulations, an EMI filter is often necessary. The major objective of this book is to investigate and suppress of the adverse effects of PWM inverters. Theoretical analysis of all the adverse effects is presented in this book. Several passive and active EMI filters and their design procedures are proposed and performed. The experimental results of applying these novel filters are presented.
To overcome the limitations of traditional multilevel inverter, in this book Z-source multilevel inverter is proposed. It comprised by Z-source network and multilevel inverter topology. Multilevel inverter has a unique structure they are specially suited for applications which need low THD. Multilevel inverter is a power electronic device built to synthesize a desired AC output voltage from several DC voltage sources. Multilevel inverter not only can generate the output voltage with very low distortion, but also can reduces the Electromagnetic Compatibility Problems (EMC). Proper selection of pulses in the Z-source MLI can limit the THD in the output voltage. Cascaded multilevel inverters have been developed for electric utility applications. This book provides features and control schemes of the cascaded multilevel inverter for utility applications including renewable energy, VAR compensation, voltage regulation and harmonic filtering in power systems.