CAJ | 학술논문

EMI滤波器是抑制传导干扰的重要元件。论文对差、共模混合噪声电路在“阻抗失配”的基础上，可以分离为两部分独立的等效通道。对两个通道各自加载差模和共模噪声，求解电路网络，在负载端可以得到差、共模干扰噪声。由此，可以得到由于支路阻抗的不对称而引起的差、共模噪声之间的相互转化。基于环形结构的平面EMI滤波器是本课题组提出的一种新型结构，但是仍然存在对应支路阻抗不对称问题引起噪声相互转化的问题。为此，本文提出一种单面完全覆金属的“感容”集成模块(LC单元)，与双面均为螺旋型 LC单元进行比较表明，所提出的模块具有良好对称性，能更好地抑制平面滤波器差、共模噪声之间的相互转化。
EMI려파기시억제전도간우적중요원건。논문대차、공모혼합조성전로재“조항실배”적기출상，가이분리위량부분독립적등효통도。대량개통도각자가재차모화공모조성，구해전로망락，재부재단가이득도차、공모간우조성。유차，가이득도유우지로조항적불대칭이인기적차、공모조성지간적상호전화。기우배형결구적평면EMI려파기시본과제조제출적일충신형결구，단시잉연존재대응지로조항불대칭문제인기조성상호전화적문제。위차，본문제출일충단면완전복금속적“감용”집성모괴(LC단원)，여쌍면균위라선형 LC단원진행비교표명，소제출적모괴구유량호대칭성，능경호지억제평면려파기차、공모조성지간적상호전화。
EMI filter is an important component to suppress the conducted EMI noise. Based on“impedance mismatch”, the DM and CM circuit can be separated into two independent equivalent channels. Applying DM and CM noise for each channel, the DM and CM interference noise can be achieved in the load by solving the circuit network. Thus, the transformation between the DM and CM noise can be obtained, which caused by the asymmetric branch impedance. The important conclusions are achieved, that is, inhibiting the “CM noise from the DM excitations” is more difficult. Annular planar EMI filter is a new structure proposed by our research group, but there are still existing the transformation problems, which caused by the asymmetric branch impedance. Therefore, in this paper, a new kind of“LC” integrated module with one side fully covered with metal(LC unit) is proposed. Meantime, it is compared with the LC unit which has spiral on both sides. Research shows that, the proposed model has a good symmetry and can effectively reduce the transformation between the DM and CM noise.