SPWM Variable Frequency Speed Regulation Application Technology

Author: Zhang Yanbin
Publisher:
Publish Date: 2005-07-01
Features: This book aims to assist electrical workers on production lines in selecting and properly using frequency converters, making it easy to understand. It first explains in depth the working requirements of power driving systems, the main theories of asynchronous motors, and the basic principles of AC-DC and AC-AC frequency converters. It then provides detailed explanations of the meanings of each function in frequency converters, the basis and methods for pre-setting, the design and installation of frequency converter-driven systems, and the applications of frequency converters in water pumps and fans, hoisting machinery and elevators, metal cutting machine tools and other machinery. It also delves into some issues encountered during use. This revision thoroughly rewrites Chapter 8, "Frequency Conversion Speed Regulation for Fans and Pumps," making it more practical. A new Chapter 12 has been added, discussing in depth topics such as regenerative braking, power factor, torque control functions and their applications, the switching between frequency conversion and power frequency in constant pressure water supply systems, energy-saving analysis of water pump installations, handling cases where voltage and frequency do not match, and the economic benefits of frequency conversion speed regulation. The content of other chapters has also been enriched. This book is suitable for readers who use and maintain frequency converters, as well as for users of frequency converters as training material.