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http://hdl.handle.net/10397/92334
Title: | An IPT battery charger with near unity power factor and load-independent constant output combating design constraints of input voltage and transformer parameters | Authors: | Qu, X Chu, H Wong, SC Tse, CK |
Issue Date: | Aug-2019 | Source: | IEEE transactions on power electronics, Aug. 2019, v. 34, no. 8, 8533368, p. 7719-7727 | Abstract: | Inductive power transfer (IPT) techniques are becoming popular in battery charging applications due to some unique advantages compared to the conventional plug-in systems. A high-performance IPT charger should provide the battery with an efficient charging profile consisting of constant charging current and constant charging voltage. However, with a wide load range, it is hard to realize the initial load-independent constant current (CC) and the subsequent load-independent constant voltage (CV) using a single IPT converter while maintaining nearly unity power factor and soft switching of power switches simultaneously. This paper systematically analyzed the characteristics of an LCC-LCC compensated IPT converter and proposed a design method to realize the required load-independent CC and CV outputs at two zero-phase angle frequencies. The design also combats the constraints of an IPT transformer and input voltage, thus facilitating the use of a simple duty cycle control operating at two fixed frequencies for both CC and CV operations. The design criteria, control logic, and sensitivities of compensation parameters to the input impedance and load-independent output are discussed. Finally, an IPT battery charger prototype with 1 A charging current and 24 V battery voltage is built to verify the analysis. | Keywords: | Inductive power transfer (IPT) battery charger LCC-LCC compensation Load-independent outputs Soft switching Unity power factor |
Publisher: | Institute of Electrical and Electronics Engineers | Journal: | IEEE transactions on power electronics | ISSN: | 0885-8993 | EISSN: | 1941-0107 | DOI: | 10.1109/TPEL.2018.2881207 | Rights: | © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication X. Qu, H. Chu, S. Wong and C. K. Tse, "An IPT Battery Charger With Near Unity Power Factor and Load-Independent Constant Output Combating Design Constraints of Input Voltage and Transformer Parameters," in IEEE Transactions on Power Electronics, vol. 34, no. 8, pp. 7719-7727, Aug. 2019, is available at https://doi.org/10.1109/TPEL.2018.2881207 |
Appears in Collections: | Journal/Magazine Article |
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Qu_Ipt_Battery_Charger.pdf | Pre-Published version | 3.68 MB | Adobe PDF | View/Open |
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