Active source current filtering to minimize the DC-link capacitor in switched reluctance drives

Abstract

Switched reluctance machines receive increased attention by the automotive industry because of their cost efficiency. However, the comparatively larger inverter is a disadvantage of this machine type. This paper evaluates the effects of the usage of a dc-dc converter to reduce the size of the dc-link capacitor by active filtering of the source current. The active filter is compared to a passive filter. Besides, the influence of a variable dc-link voltage level on the machine efficiency is investigated.