Paper Info
Title
LLC Resonant Converter With Damping Split Inductor Improving Light-Load Regulation Ability
Abstract
LLC resonant converters are widely used in On-board Power Converter but the pumping voltage of traditional LLC converter is unavoidable under light-load conditions due to the existence of parasitic parameter. In this paper, an LLC resonant converter with damping split inductor is proposed to improve the light-load regulation capability. The original resonant inductor is divided into two parts in series. Then, a simple damping resistor connected on one part in parallel and the other part can be integrated into the transformer. Using damping split inductor, significant regulation improvements could be achieved under light-load conditions with not any change in control strategy and almost zero hardware cost. In addition, based on impedance analysis of the resonant tank, the effects of the proposed method are analyzed including voltage gain, soft switching characteristics, suppression of high frequency interference components, and system power loss. Moreover, the detailed design process and optimization conditions of the damping split inductor parameters are carefully illustrated. Eventually, the experimental results demonstrate the characteristics mentioned above for the 96 W prototype at the expense of a maximum increase in device loss of 0.85 W.
Year
DOI
Venue
2020
10.1109/TVT.2019.2957773
IEEE Transactions on Vehicular Technology
Keywords
Field
DocType
Switches,Damping,Inductors,Voltage control,Impedance,Capacitance,Resonant frequency
Capacitance,Computer science,Control theory,Voltage,Transformer,Inductor,Electrical impedance,Electronic engineering,Converters,Resistor,Interference (wave propagation)
Journal
Volume
Issue
ISSN
69
2
0018-9545
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Hang Jing100.34
junhua wang2116.62
Zhijian Fang321.43
Lijun Xie400.34