Title :
A new approach to analyze and reduction of RF conducted emission due to PWM in a buck converter
Author :
Farhadi, Alireza
Author_Institution :
Niroo Res. Inst.
Abstract :
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
Keywords :
DC-DC power convertors; PWM power convertors; electric impedance; electric noise measurement; interference suppression; radiofrequency interference; switching circuits; DC/DC converter; EMI measurement; PWM; RF conducted emission reduction; buck converter; buck switching power supply; conducted electromagnetic interference; differential mode conducted noise emission; equivalent noise circuit; fixed frequency pulse width modulation controller; input voltage; line impedance stabilization network; noise spectrum; radio frequencies; reference voltage;
Conference_Titel :
Electricity Distribution, 2001. Part 1: Contributions. CIRED. 16th International Conference and Exhibition on (IEE Conf. Publ No. 482)
Conference_Location :
Amsterdam
Print_ISBN :
0-85296-735-7
DOI :
10.1049/cp:20010735
