Multileg Interleaved Buck Converter for EV Charging: Discrete-Time Model and Direct Control Design

被引:20
|
作者
Cuoghi, Stefania [1 ]
Mandrioli, Riccardo [2 ]
Ntogramatzidis, Lorenzo [1 ]
Gabriele, Grandi [2 ]
机构
[1] Curtin Univ, Sch Elect Engn Comp & Math Sci, Bentley, WA 6102, Australia
[2] Univ Bologna, Dept Elect Elect & Informat Engn, I-40121 Bologna, Italy
关键词
buck converter; interleaved converter; electric vehicle; phase margin; gain crossover frequency; STABILITY;
D O I
10.3390/en13020466
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
This paper presents the modeling and the implementation of the digital control of a multileg interleaved DC-DC buck converter for electrical vehicle (EV) charging. Firstly, we derive a discrete averaged model of an n-leg interleaved buck converter (IBC). Secondly, we present a direct tuning procedure for one primary discrete PIDF (PID + filter) and multiple secondary PI controller. The objective of the control system is to regulate the current flow in each leg of the converter. This task is accomplished by introducing a novel control paradigm that simultaneously addresses two aims: on the one hand, the control scheme must guarantee an acceptable level of robustness under load variations; while on the other, an even distribution of power on each leg must be ensured at any operational condition. The proposed strategy hinges on a technique that combines simplicity and precision in the fulfillment of design frequency specifications. We use simulations and a digital signal processor (DSP) based experimental implementation of the design technique to validate the proposed methodology.
引用
收藏
页数:18
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