Bøker av Wei Xu

This book presents an improved Field-oriented control strategy, for optimal proportional-integral (PI) parameters for robust stability, faster dynamic response, and higher efficiency in flux-weakening region for Permanent magnet synchronous motors. Combined design of a PI current regulator and a varying switching frequency PWM is presented.

This book presents advances in control technologies for efficient operation of the brushless doubly-fed induction generator (BDFIG). For robust and low-cost operation of BDFIGs, it is required to keep high-quality output voltage and eliminate the speed/position encoder under different loads and operation conditions. Some advanced control technologies, from the authors' latest work on these topics, are presented to achieve this goal with simple and accurate texts, illustrations, and tables. The qualified outcomes obtained from this book assure the high-performance operation of BDFIGs and also give the readers a straight insight toward challenges in this research area in the future.

Optimizing Supply Chain Performance takes industrial case studies from SMEs in China to examine the importance of information sharing and coordinated management as essential mechanisms to improve supply chain performance.

Examines the various aspects of the relationships between mothers and education at different levels in the education system. In particular, mothers of young children in relation to various educational policies are looked at in interaction with their children's schools and teachers.

A solid foundation for improving your drawing skills Teaching a new observational method based on math and computer graphics principles, this book offers an innovative approach that shows you how to use both sides of your brain to make drawing easier and more accurate.