Paper Info
Title
VSFPWM Based on Circulating Current Ripple Prediction for ZVS in Two Paralleled Grid-Tied Inverters With Coupled Inductors
Abstract
Zero voltage switching (ZVS) control is an effective and promising way to further improve the power density, efficiency and electromagnetic interference for the two paralleled silicon carbide inverters with coupled inductors. In this article, focusing on the popular 180 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> interleaved pulsewidth modulation (PWM), the circulating current ripple prediction model is first derived as a function of operating conditions in the time-domain. With the assistance of this model, the actual trajectory of phase-leg currents can be reconstructed by superposition of sampling fundamental current and predicted circulating current ripple, without adding any high-frequency current sensor or auxiliary circuit. By carefully considering the ZVS requirement of all switches, a variable switching frequency PWM (VSFPWM) for full range ZVS control is proposed in this article. The proposed VSFPWM shows a good performance of ZVS realization in various load situations, as well as a good dynamic response of the inverter during current step change. In addition, due to the real-time variation of switching frequency, the proposed VSFPWM demonstrates the obvious advantage in conductive EMI reduction. Both the simulation and experimental results are presented to verify the effectiveness of the analysis and proposed method.
Year
DOI
Venue
2023
10.1109/TIE.2022.3146519
IEEE Transactions on Industrial Electronics
Keywords
DocType
Volume
Circulating current ripple,silicon carbide (SiC),variable switching frequency,zero voltage switching (ZVS)
Journal
70
Issue
ISSN
Citations 
1
0278-0046
0
PageRank 
References 
Authors
0.34
6
5
Name
Order
Citations
PageRank
Qiao Li100.68
Yafei Ma200.34
Xuan Zhao300.34
Dong Jiang413.42
Yechi Zhang500.34