This work introduces an improved and simplified method to design electromagnetic interference (EMI) filters for switching power supplies. This method uses the practical approach of measuring the power supply noise spectrum and using the data to calculate the differential mode and common mode noise impedances. The noise impedance magnitude information aids the design of the EMI filter. Phase information for the noise impedance is not required. In addition, information about the topology and control method of the power supply is not needed. A procedure for designing EMI filters for power line applications is presented based on the analysis of conducted EMI problems and the use of noise separator. Design examples are given, and results are experimentally verified.
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Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.