Description
There are significant research efforts worldwide related to renewable energy conversion, electric transportation, and many other industrial applications that require power converters/ inverters. Thus there is a huge scope for developing commercially viable and technically feasible efficient and reliable power converters. The traditional voltage source inverter has to maintain a dead‐time between the upper and lower switches in one bridge leg to avoid short circuit, which introduces distortions to ac output waveforms. Also, an extra dc‐dc boost converter is usually required when the dc source voltage is insufficient to supply the output voltage, resulting in a two‐stage system with high cost and complicated control. The traditional current source inverter has analogous limits. All this has motivated many researchers to work on a single‐stage converter. This book brings together state‐of‐the‐art knowledge and cutting‐edge techniques in various stages of research related to the most popular and appealing single‐stage converter, which is the impedance source converter/inverter and its modifications.
The impedance source network, consisting of inductors, capacitors, and switches/diode, overcomes the above mentioned limitations by offering buck or boost capabilities in a single stage and short‐circuit immunity of inverter legs. All this makes it possible to get rid of the dead‐time between phase‐leg switches and to enhance the reliability of the system. The solution has found widespread investigations for dc‐dc, dc‐ac, ac‐dc, and ac‐ac low‐/highpower conversion since it was first suggested.
This book presents a systemic view of impedance source converters/inverters, offering comprehensive analysis, control, and comparison of both typical and various derived impedance source topologies reported in literatures and researched by the authors. The impedance source converters/inverters distribute the shoot‐through behavior into the inverter/converter phase legs. All the traditional pulse width modulation (PWM) schemes can be used to drive the phase legs. The book addresses and compares different kinds of modified PWM schemes for impedance source converters/inverters, including simple boost control, maximum boost control, maximum constant boost control, space vector modulation, and pulse‐width‐amplitude modulation. The book also discusses the hardware design of passive components for optimizing the converters/inverters. The impedance values are significant to the system performance.
The approach is to maintain lower size, volume, and weight while ensuring high performance and high quality responses.
Modeling of converters/inverters is essential for understanding the circuit operation and developing control methods. Thus, this book includes the models of impedance source converters/ inverters used to design control parameters for corresponding linear control methods, and also to develop model predictive control. The book presents also various existing topics such as applications of impedance source converters/inverters to renewable energy generation and electric drives, multi‐leg (four‐leg and five‐phase) converters/inverters. It includes the configuration, operation, and simulation/experiment results of the discussed topologies and control. Future trends of research and development in this area are also discussed.
The book provides a thorough understanding of the concepts, design, control, and applications of the impedance source converters/inverters. Researchers, senior undergraduate and graduate students, as well as professional engineers investigating vital topics related to power electronic converters will find great value in the content of the book. They will be able to apply the presented design approaches in this book to building and researching the future generation of efficient and reliable power electronics converters/inverters.
The contribution of Dr Poh Chiang Loh in this book is Chapter 9, Section 7.1, Section 12.1, and Subsection 1.1.2. The rest of materials are the contribution of the other authors (except Chapter 17 has the contribution from Dr Sertac Bayhan, Chapter 18 has the contribution from Dr Sertac Bayhan and Mr Mostafa Mosa, and Chapter 19 has the contribution from Dr Mohamed Trabelsi).