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EMI-Filter Interactions in a Buck Converter
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| Author(s) |
Mikko Hankaniemi, Matti Karppanen, Teuvo Suntio |
| 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 negativeresistor–
oscillation (NRO) phenomenon, and confirm also
the excess EMI-filter sensitivity of the voltage-mode
controlled converter. |
| Download |
| Filename: | T2-104.pdf |
| Filesize: | 287.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-13 by System |
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