Abstract
Inductive power transfer (IPT) systems have become more and more popular recently. To improve transient responses and load disturbance responses, this paper proposes a predictive controller design for a three-winding inductive power transfer (IPT) system. First, a three-winding IPT is presented. Next, a predictive controller is designed based on augmented variables and a performance index. Finally, a digital signal processor, TMS 320F2808, made by Texas Instrument, is used to execute the predictive control algorithms and to control the switching states of the power devices. An IPT system, with DC 220 V input, DC 130 V output, and a rated power of 2 kW, is implemented. A buck converter is used to provide an adjustable output voltage and output current to charge a battery set. Experimental results show that the proposed predictive controllers of the IPT system have better performance than proportional-integral (PI) controllers, including faster transient responses and better load disturbance responses.
Highlights
Inductive power transfer (IPT) systems have been widely used to transfer power without physical contact
Several researchers have focused on advanced controller designs for IPT systems
Li et al investigated a robust controller for IPT systems to improve the problems of parametric uncertainty, load disturbance, and misalignment [4]
Summary
Inductive power transfer (IPT) systems have been widely used to transfer power without physical contact. Based on a closed-loop IPT system with a two-degree-of-freedom control structure, good performance can be obtained, even though the mutual inductances vary and load changes. The μ-synthesis control method was based on structured singular values [5] Their experimental results showed that the proposed IPT system could quickly and accurately track the reference voltage. The concepts of predictive controllers are intuitive and easy to understand They can be applied for different IPT systems that include input constraints and nonlinearities. To the authors’ best knowledge, there are no or only a few researchers who have investigated predictive controller designs for IPT systems. To fill this research gap, a predictive controller design for an IPT system is proposed here. To the authors’ best knowledge, the ideas demonstrated in this paper are original and have not been discussed in previously published papers [1,2,3,4,5,6,7,8,9]
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