基于DSP的变频调速系统电磁干扰问题研究

基于DSP(数字信号处理器)控制的变频调速系统是一种复杂的数字系统,他含有功率单元,其干扰主要来自内部元件之间、分系统之间、传输通道的相互串扰,数据信息所产生的干扰与破坏,严重地影响了数字信号处理器工作的稳定性、可靠性和安全性。根据统计,干扰引起的事故占总事故的90%左右。同时变频器的载波频率高达15 kHz,而且输出功率大,对外的电磁辐射和对电网的干扰将严重地影响了本身和其他电子设备的正常运行。因此,研究变频器与电磁环境的兼容性是电力电子电磁兼容性领域里的重要方面。

Research of Frequency Control System's Electromagnetic Interference Problem Based on DSP

Based on the system of frequency control of DSP,it is a kind of complex digital system,it contains power unit,its disturb come from between builtin element mainly,between each subsystem,the mutual string between transmission passageway disturb,it has affected safety,reliability and the stability of digital signal processor work seriously.At the same time,the carrier frequency of frequency converter is as high as 15 kHz,and it is big to export power,for outside world disturb the normal operation that will affect other electrical equipment seriously.Therefore study the system of frequency control to fight electromagnetism disturb problem is the important program in power electronic electromagnetism compatibility field.