Impact of Periodic Switching Frequency Modulation control to reduce conducted EMI in Power Factor Converters

2006 ◽  
Author(s):  
Jean-Charles Le Bunetel ◽  
David Gonzalez ◽  
Josep Balcell
Keyword(s):  
Power Factor ◽  
Frequency Modulation ◽  
Switching Frequency ◽  
Modulation Control ◽  
Conducted Emi ◽  
Periodic Switching

Conducted EMI Reduction in Power Converters by Means of Periodic Switching Frequency Modulation

2007 ◽  
Vol 22 (6) ◽  
pp. 2271-2281 ◽  
Author(s):  
David Gonzalez ◽  
Josep Balcells ◽  
Alfonso Santolaria ◽  
Jean-Charles Le Bunetel ◽  
Javier Gago ◽  
...  
Keyword(s):  
Frequency Modulation ◽  
Power Converters ◽  
Switching Frequency ◽  
Conducted Emi ◽  
Periodic Switching ◽  
Emi Reduction

Effects of Switching Frequency Modulation on Input Power Quality of Boost Power Factor Correction Converter

2017 ◽  
Vol 8 (2) ◽  
pp. 882 ◽  
Author(s):  
Deniss Stepins ◽  
Jin Huang
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Frequency Modulation ◽  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Input Power ◽  
Switching Frequency

Switching frequency modulation (SFM) as spread-spectrum technique has been used for electromagnetic interference reduction in switching power converters. In this paper, a switching-frequency-modulated boost power factor correction (PFC) converter operating in continuous conduction mode is analysed in detail in terms of its input power quality. Initially, the effect of SFM on the input current total harmonic distortion, power factor and low-frequency harmonics of the PFC converter are studied by using computer simulations. Some advices on choosing parameters of SFM are given. Then the theoretical results are verified experimentally. It is shown that, from a power quality point of view, SFM can be harmful (it can significantly worsen the power quality of the PFC converter) or almost harmless. The results depend on how properly the modulation parameters are selected.

scholarly journals Conducted EMI of Switching Frequency Modulated Boost Converter

2013 ◽  
Vol 3 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Deniss Stepins
Keyword(s):  
Frequency Modulation ◽  
Experimental Verification ◽  
Electromagnetic Interference ◽  
Modulation Frequency ◽  
Boost Converter ◽  
Switching Frequency ◽  
Research Papers ◽  
Theoretical Results ◽  
Analysis Line ◽  
Conducted Emi

Abstract In this paper conducted electromagnetic interference (EMI) of boost converter with switching frequency modulation (SFM) is theoretically analyzed in details. In the analysis line impedance stabilization network parameters, power inductor and input filtering capacitor parameters are taken into account. The analysis shows that the conducted EMI attenuation due to the use of SFM depends not only on modulation index as it is assumed in numerous research papers, but also on central switching frequency. Useful expressions to numerically calculate SFM boost converter conducted EMI spectrum and attenuation due to the use of triangular and sawtooth modulation waveforms are derived. Additionally experimental verification of the theoretical results is performed using a superheterodyne spectrum analyzer. Moreover a procedure for the choice of optimum SFM parameters (modulation waveform, frequency deviation and modulation frequency) to get maximum conducted EMI attenuation is proposed.

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