Output Ripple Reduction of an Automotive Multi-Phase Bi-Directional DC-DC Converter
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Datum
2009Typ
- Conference Paper
ETH Bibliographie
yes
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Abstract
Bi-directional dc-dc converters for automotive applications typically are limited to generate only a small voltage ripple, especially when a ultra-capacitor with a limited ripple current capability is interfaced by the converter. Thus, to minimize the ripple quantities and the converter volume at the same time, interleaved multi-phase dc-dc converters are utilized. However, tolerances of the buck+boost inductors of the interleaved phases generate sub-harmonics in the ripple spectrum that are counterproductive to the advantage of ripple reduction. A method to cancel the fundamental frequency of the voltage ripple is proposed that is applicable to a converter consisting of three or more phases. It is shown that even for a low phase count the overall ripple amplitude is greatly reduced, only by adjustment of the phase shift angles. Experimental results carried out with a three-phase interleaved bi-directional dc-dc converter proof the concept functionality. Mehr anzeigen
Publikationsstatus
publishedExterne Links
Buchtitel
2009 IEEE Energy Conversion Congress and ExpositionSeiten / Artikelnummer
Verlag
IEEEKonferenz
Thema
DC-DC Converter; Interleaving; Multi-Phase; Voltage RippleETH Bibliographie
yes
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