.png){kind=icon}
.png){kind=icon}
Return
An Improved Carrier Redistribution PWM for a Five-Level Switched-Capacitor Hybrid-Clamped Converter With Optimized THD
.png){kind=icon}
PRE
AI
H
J
Z
W
S
P
T
DOI：10.1109/jestpe.2026.3692776.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The five-level switched-capacitor hybrid-clamped (5L-SCHC) converter exhibits lower low-frequency voltage ripple in DC-link capacitors and voltage passive self-balancing of switched-capacitors (SCs), offering clear advantages over other multilevel clamped converters. However, the discrete output characteristics of the 5L-SCHC circuit make it difficult to maintain capacitor voltage balancing with traditional modulation methods, leading to suboptimal harmonic performance. To address this issue, this article introduces an improved carrier redistribution pulsewidth modulation (ICR-PWM). Through carrier redistribution (CR) and variable reference modulation voltage strategy, the optimal distribution of output voltage pulses is achieved within two carrier cycles, thereby enhancing the output performance of the 5L-SCHC converter. On this basis, duty cycle modification is applied to balance the DC-link center capacitor voltage in the first carrier cycle, while the SC voltages are balanced in the other one. Additionally, the upper and lower DC-link capacitor voltages are balanced over the two carrier cycles via optimal zero-sequence voltage (ZSV) injection. Finally, validation is conducted on the experimental platform, and the experimental results validate that the proposed ICR-PWM method ensures capacitor voltage balance under various conditions, exhibiting remarkably improved harmonic performance over traditional methods.
Keywords:
Capacitor voltage balancing
carrier redistribution (CR)
harmonic performance
multilevel clamped converter
switched-capacitor (SC)
Journal
I
IF:
4.9
Papers:
249
Citations:
0
Organization
Cited Papers