关于家电设备开关电路的抖频技术改善电磁干扰的研究  

Research on improving EMI by Frequency jittering of household appliances

作　　者：孙金田 Sun Jintian(Foshan Meimei Group Household Air Conditioning Division,Foshan Guangdong,528311)

机构地区：[1]佛山市美的集团家用空调事业部

出　　处：《电子测试》2019年第14期95-98,共4页Electronic Test

摘　　要：本文通过对家用设备开关电源、有源PFC电路和IPM电路的电路原理,以及PWM控制信号的抖频控制技术进行分析,通过大量的EMC试验测试数据,研究PWM控制信号的不同抖频控制方式对整机EMC电磁兼容性能的影响,从中找出对整机EMC电磁兼容性能改善最佳的抖频方式。In this paper, the principle of switching power supply, active PFC circuit and IPM circuit of household appliances. and the jitter control technology of PWM control signal are analyzed. Through a large number of EMC test data, the effects of different jitter control modes of PWM control signal on EMC performance of the whole machine are studied, and the best jitter mode to improve EMC performance of the whole machine is found out.

关 键 词：家电设备 有源PFC IPM模块 变频控制 抖频 电磁干扰 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]