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。
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.
出处
《煤炭技术》
CAS
北大核心
2011年第9期66-69,共4页
Coal Technology
关键词
PWM控制技术
电力电子
准正弦
随机开关
开关损耗
PWM control technology
electric power electron
accurate sine
stochastic switch
switching loss
