现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
15期
76-78,82
,共4页
共模扼流圈%分离网络%共模传递比%差模抑制比%差模传递比%共模抑制比
共模扼流圈%分離網絡%共模傳遞比%差模抑製比%差模傳遞比%共模抑製比
공모액류권%분리망락%공모전체비%차모억제비%차모전체비%공모억제비
common mode choke%separation network%CM transmission ratio%DM rejection ratio%DM transmission ratio%CM rejection ratio
测试传导性干扰的模态噪声,是设计电磁干扰(EMI)滤波器的前提条件。共模扼流圈能够抑制共模模态,而不影响差模电流的输出。根据共模扼流圈这一特点,设计一种由两个共模扼流圈为核心的共模/差模分离网络,实现共模电压和差模电压的同时输出。仿真结果表明,在150 kHz~30 MHz的测试频带,输入端口阻抗基本在50Ω,并且共模传递比(CMTR)、差模抑制比(DMRR)、差模传递比(DMTR)及共模抑制比(CMRR)四个结果显示了该分离网络的良好模态分离效果。
測試傳導性榦擾的模態譟聲,是設計電磁榦擾(EMI)濾波器的前提條件。共模扼流圈能夠抑製共模模態,而不影響差模電流的輸齣。根據共模扼流圈這一特點,設計一種由兩箇共模扼流圈為覈心的共模/差模分離網絡,實現共模電壓和差模電壓的同時輸齣。倣真結果錶明,在150 kHz~30 MHz的測試頻帶,輸入耑口阻抗基本在50Ω,併且共模傳遞比(CMTR)、差模抑製比(DMRR)、差模傳遞比(DMTR)及共模抑製比(CMRR)四箇結果顯示瞭該分離網絡的良好模態分離效果。
측시전도성간우적모태조성,시설계전자간우(EMI)려파기적전제조건。공모액류권능구억제공모모태,이불영향차모전류적수출。근거공모액류권저일특점,설계일충유량개공모액류권위핵심적공모/차모분리망락,실현공모전압화차모전압적동시수출。방진결과표명,재150 kHz~30 MHz적측시빈대,수입단구조항기본재50Ω,병차공모전체비(CMTR)、차모억제비(DMRR)、차모전체비(DMTR)급공모억제비(CMRR)사개결과현시료해분리망락적량호모태분리효과。
Testing for conducted electromagnetic interference is a precondition for design of EMI filters. The common mode choke can reject the common mode(CM)modal,but does nothing with the output of differential mode(DM)current. According to this characteristic of CM choke,a novel separation network for CM and DM EMI was designed to carry out the voltage output of both CM and DM,which consists of two common mode chokes. The simulation results indicates that the input impedances holds on 50 Ω at the frequency range of 150 kHz~30 MHz. The four results of CM transmission ratio(CMTR),DM rejection ra-tio (DMRR),DM transmission ratio (DMTR) and CM rejection ratio (CMRR) revealed the perfect mode separation perfor-mance of this separation network.