A New Approach to Analyse and Reduction of Radio Frequency Conducted Emission Due to P.w.m in a Buck Converter
نویسنده
چکیده
The conducted Electromagnetic interference (EMI) emission due to the usage of a fixed frequency Pulse Width Modulation (PWM) controller in a buck switching power supply is studied .The study is based on the variations of PWM waveform due to those of input Voltage, reference Voltage,and load.Line Impedance Stabilization Network (LISN) is introduced to be employed in EMI measurement. An equivalent noise circuit is presented to model Differential Mode (dm) conducted noise emission. The noise spectrum of LISN output is computed in Radio Frequencies(RF), and the effect of different parameters is analysed using appropriate simulations.
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