PWM技术优化的实现与应用_李开彦.pdfVIP

第30卷第9 期 煤 炭 技 术 Vol.30,No.09 2011 年9 期 Coal Technology September,2011 PWM 技术优化的实现与应用 李开彦，贺 攀，干 磊 （黄石供电公司，湖北 黄石 435000） 摘 要:PWM 技术在电力电子系统中应用广泛，并且具有重要地位。但是PWM 技术在应用中也存在许多不足之 处。例如在逆变电路中，SPWM 技术的直流电压利用率较低，含有较大的谐波分量，电磁干扰（EMI）严重，开关损耗 较大。优化PWM 技术关键在于通过对常规PWM 技术的改进，在确保实现电力电子系统基本功能的同时，尽可能 减小PWM 技术在应用中的不足。文章分析了几种优化PWM 技术的原理，并且介绍了其模型。 关键词:PWM 控制技术；电力电子；准正弦；随机开关；开关损耗 中图分类号:TD464 文献标识码:A 文章编号:1008-8725 （2011）09-0066-04 Optimization and Application of PWM Technology LI Kai-yan, HE Pan, GAN Lei （Huangshi Electric Power Supply Company, Huangshi 435000, China） Abstract:The PWM technology is widely applied in the electric power electron system, which enjoys an important status in the electric power electronic technology. However, the PWM technology also has many insufficiencies in the application. For example, in the contravariant electric circuit, the usage ratio of the SPWM technology DC voltage is low, while the harmonic content is rich, causing serious electromagnetic interference as well as large switching loss. The key to optimize the PWM technology lies in the improvement of the conventional PWM technology, and at the same time guarantee the realization of basic functions of the electric power electron system and reduce the insufficiency of the PWM technology as far as possible in the application. In the paper, several techniques of the optimization of PWM are analyzed, its model is introduced. Key words:PWM control technology; electric power electron; accurate sine; stochastic switch; switching loss 子装置系统已广泛应用于生产中，其中PWM 控