Modeling and Control of the WPT System Subject to Input Nonlinearity and Communication Delay

Wireless power transfer (WPT) systems are a kind of high-order, highly nonlinear, time-delay systems. The conventional circuit theory-based methods for modeling the system results in high-order models, so it may not be efficient in digital implementation, especially on cost-sensitive micro-controlle...

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Vydáno v:IEEE transactions on power electronics Ročník 38; číslo 11; s. 1 - 12
Hlavní autoři: Zhao, Shijun, Tang, Chunsen, Chen, Fengwei, Zhao, Dan, Deng, Pengqi, Xiao, Jing
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.11.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Analytical models
Circuits
Closed loops
Control systems design
Data models
Data-driven modeling
Delay effects
Delays
Feedback control
hammerstein model
Integrated circuit modeling
internal model control (IMC)
Load modeling
Microcontrollers
Modelling
nonlinear system
Nonlinear systems
Nonlinearity
Steady-state
time delay
Time delay systems
Wireless communications
wireless power transfer (WPT)
Wireless power transmission
ISSN:0885-8993, 1941-0107
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Popis
Shrnutí:Wireless power transfer (WPT) systems are a kind of high-order, highly nonlinear, time-delay systems. The conventional circuit theory-based methods for modeling the system results in high-order models, so it may not be efficient in digital implementation, especially on cost-sensitive micro-controllers. Besides, the time delay will impair the feedback performance of the system, and even lead to closed-loop instability under incorrectly compensated. To solve the above-mentioned problems, this article proposes to infer a low-order model for the system based on sampled data and then use this model to design the control system. More precisely, the proposed methodology consists of two steps: In the first step, a parsimonious modeling method is proposed to yield a low-order model of Hammerstein type plus time delay, which makes it possible to simulate the model response in a cost-sensitive micro-controller; Then, based on the model obtained in the previous step, the internal model control (IMC) is adopted to design the closed-loop control system. Benefited from the accurate prediction provided by the model, the closed-loop controller can mitigate the effect of the time delay and track the set value quickly. Finally, experimental and comparative results are given to verify the effectiveness of the proposed method.
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ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2023.3307691