摘要
针对工程中开关类设备的电磁兼容问题,着重探讨开关电源电磁干扰的形成机理及其辐射发射的预测模型。从传导和辐射两个方面分析开关电源电磁干扰产生的机理;并运用辐射偶极子理论,结合有限元方法建立了开关电源辐射发射的数学模型。在此基础上,借助软件工具对开关电源的辐射发射进行模拟仿真,分析差模回路面积、形状以及谐波电流频率对近场辐射的影响,从而实现对开关电源辐射发射的数值预测。
The EMI formation mechanism of switching mode power supply is discussed and analyzed from the aspects of conduct and radiation,and a prediction model for the radiated emissions is established using radiation dipole theory and finite element method.Based on the model,the radiated emissions from switching mode power supply is simulated using the software which can analyzes the area,shape of differential mode circuit and the impact of harmonic current frequency on near-field radiation.Therefore,the value of th...
出处
《舰船电子工程》
2008年第6期187-191,共5页
Ship Electronic Engineering
关键词
开关电源
辐射发射
预测
有限元
switching mode power supply
radiated emissions
prediction
finite element method
