然而，由于开关电源工作在高频状态，其产生的瞬态脉冲包含有能够发射电磁干扰(emi)的的高频谐波。
However, SMPS operate at high switching frequencies, and the associated transient pulses are full of high frequency harmonics that may cause electromagnetic interference (EMI).
共模扼流圈的高频特征极大地影响了电磁干扰（EMI）滤波器抑制传导EMI噪声的性能。
The high frequency parasitic parameters of common mode(CM) choke significantly influence the performance of electromagnetic interference(EMI) filter for conducted EMI suppression.
高频开关电源是严重的电磁干扰源，很多情况下需对其安装emi电源滤波器。
Switch power of high frequency is serious electromagnetic interference (EMI) source, so EMI source filter usually should be added in switch power.
在对离线式PWM变换器电磁干扰源和电磁干扰传播通道分析的基础上，通过实测和理论分析相结合的方式，建立了电磁干扰传播通道的高频模型，并进行了验证。
Based on the analysis of the EMI sources and coupling paths of an off-line PWM converter, a high frequency model of EMI coupling paths is built and verified by measuring and theoretical calculation.
结论：应采取适当的电磁防护措施，增强便携式呼吸机对高频电磁辐射的抗干扰能力。
Conclusion it is necessary to take appropriate defending measures to enhance the electromagnetic immunity for high frequency electromagnetic radiation.
高频段电磁环境恶劣，近区雷电在这一频段激发的天电噪声对HF -GW雷达的正常工作构成了严重干扰。
High frequency band is a hostile electromagnetic environment. In this band atmospheric noise emitted by lightning in a short distance may badly affect HF GW radar's normal function.
大功率通信高频开关电源的噪声干扰中除了有谐波的传导干扰外，还存在电磁的辐射干扰问题。
In high-frequency switching power supply, influence on switching power supply by the more parasitic transformer parameters is increasing.
大功率通信高频开关电源的噪声干扰中除了有谐波的传导干扰外，还存在电磁的辐射干扰问题。
In high-frequency switching power supply, influence on switching power supply by the more parasitic transformer parameters is increasing.
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