Analysis and Suppression of Conducted Electromagnetic Interference of DC SSR with Transformer Isolation
In this paper, the conducted EMI (Electromagnetic Interference) of a DC SSR (Solid State Relay) in which transformer isolation circuit was adopted was investigated at working frequency and higher harmonic. The origin and propagation path of the conducted EMI was analyzed by dividing it into common mode EMI and differential mode EMI. The equivalent circuit of dual-winding transformer of iron-core was proposed considering leakage inductance, iron loss in core and cupreous loss in winding. The conducted EMI model of the DC SSR was built by Orcad Pspice and Ansoft Q3D to predict EMI in the input port which was prescribed in GJB 1515A-CE102. The results of both simulation and experiment showed that the conducted EMI exceeded the limit of CE102. In order to improve EMC performance of SSR, an EMI filter was proposed to reduce the conducted EMI which was validated by experiment.
Transformer Isolation Conducted EMI EMI filter EMC
Xu Le Wang Shujuan Wang Genglin Zhao Duliang
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, 150001,Chin Beijing Ketong Electronic Relay Corp, Beijing, 100054, China
国际会议
温州
英文
467-472
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）