传导频谱分析

Spectrum Analysis on Conducted Emissions

传导发射是沿电源线或信号线传输的电磁发射,在低频范围内,传导发射是电磁干扰的主要形式。如不采取措施,几乎所有的电子、电气设备电源线的传导发射都得超标,它严重地威胁着其他设备的正常工作。本文对典型的干扰源—开关电源的传导发射频谱进行了分析,并介绍了降低传导干扰的设计方法。

Conducted emissions are electromagnetic emissions on power leads and signal leads. At low frequencies, conducted emissions are a major means of electromagnetic interference. Conducted emissions on power leads of all electronic and electric equipments would nearly exceed limits that are specified in the standard, if effective measures are not adopted. It would influence operation of other equipment badly. Conducted spectrum of switched power sources, a typical interference source, is analyzed in this paper, and the design techniques have been introduced to minimize conducted interference.