Abstract
This paper investigates multiphase flying capacitor multilevel (FCML) converters with coupled inductors for ripple reduction and intrinsic flying capacitor voltage balancing. FCML topologies and coupled inductors are two commonly used techniques to reduce power conversion stress, reduce ripple current, and improve system performance. Combining coupled inductors with multiphase FCML converters opens a wide range of design opportunities. The coupled inductors are shown to intrinsically balance the flying capacitor voltages, granting greater robustness to disturbances compared to uncoupled inductors and natural balancing. The ripple reduction offered by the coupled inductors and FCML structure are derived. The theoretical derivations are experimentally verified using a two-phase, three-level FCML converter. The ripple reduction and voltage balancing are realized as long as the inductors are sufficiently coupled.
Original language | English (US) |
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Pages | 1284-1290 |
Number of pages | 7 |
DOIs | |
State | Published - 2022 |
Event | 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States Duration: Mar 20 2022 → Mar 24 2022 |
Conference
Conference | 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 |
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Country/Territory | United States |
City | Houston |
Period | 3/20/22 → 3/24/22 |
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
Keywords
- coupled inductors
- flying capacitor multilevel converter
- natural balancing
- ripple reduction
- voltage balancing