DocumentCode :
2667822
Title :
EMI-Filter Interactions in a Buck Converter
Author :
Hankaniemi, Mikko ; Karppanen, Matti ; Suntio, Teuvo
Author_Institution :
Tampere University of Technology/Institute of Power Electronics, Tampere, Finland
fYear :
2006
fDate :
Aug. 30 2006-Sept. 1 2006
Firstpage :
54
Lastpage :
59
Abstract :
The paper investigates the effects of EMI filter in the dynamics of a buck converter. It is shown theoretically that the EMI filter may increase significantly the load sensitivity of the voltage-mode-controlled converter but the peak-current-mode-controlled converter is quite insensitive to the EMI filter interactions. Experimental validations are carried out using a buck converter under three different control modes - voltage-mode, peak-current-mode and output-current-feedforward peak-current-mode control. The investigations show that the phenomenon causing the instability under peak-current-mode control is the negative-resistor¿oscillation (NRO) phenomenon, and confirm also the excess EMI-filter sensitivity of the voltage-mode controlled converter.
Keywords :
Buck converters; Electromagnetic compatibility; Electromagnetic interference; Filters; Integrated circuit modeling; Open loop systems; Stability; Switching converters; Transfer functions; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. EPE-PEMC 2006. 12th International
Conference_Location :
Portoroz
Print_ISBN :
1-4244-0121-6
Type :
conf
DOI :
10.1109/EPEPEMC.2006.4778375
Filename :
4778375
Link To Document :
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