Publication Type
Conference Paper
Book Title
2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
Publication Date
Page Numbers
186 to 191
Issue
x
Publisher Location
District of Columbia, United States of America
Conference Name
2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
Conference Location
Phoenix, Arizona, United States of America
Conference Sponsor
IAS, PELS, PSMA
Conference Date
-
Abstract
The DC bus capacitor is one of the major power-density and reliability hurdles of electric drive systems. It is hard to shrink because it is constrained by the DC bus RMS ripple current, which is only load dependent. A dual-inverter based segmented drive can reduce the ripple current by ~50% compared to a non-segmented case. This paper analyzes the origin of this ripple current and points out the path for minimization. An optimal DC-ripple-energy adaptive-minimization (DREAM) modulation method is proposed to further reduce the ripple current. It is observed in experimental results that the proposed method can achieve additional 38% reduction over the traditional segmented drive system.
