Development Of AC Variable Frequency Technology

In recent years with the rapid development of power electronics technology information technology, automatic control technology, the AC drive and control technology to become one of the fastest growing technology, electric drive technology is facing a historic revolution that replaced AC variable speed DC speed and computer numerical control technology to replace analog control technology has become a trend. AC variable speed governor precise steady speed, widely used in various projects.This article from domestic and foreign frequency control theory and technology, many new research results, reviews the development and current status of frequency control technology, briefly addressed the classification of the inverter main circuit internal to the external main circuit detailing the frequency control applications in various fields of the load and the harmonics generated by frequency conversion technology issues a brief introduction. Including harmonic generation mechanism analysis, rnultifaceted approach brings hazards and harmonic suppression of harmonics. And predict the future development trend of China’s AC variable speed technology.