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HAN Hongdou,JING Yanyan,QU Xiaohui,XI Kang,ZHOU Kefeng.Inductive Charger System Based on Constant-current and Constant-voltage Hybrid Topology[J].JOURNAL OF POWER SUPPLY,2019,17(2):132-138
Inductive Charger System Based on Constant-current and Constant-voltage Hybrid Topology
Received:February 22, 2017  Revised:August 22, 2018
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DOI:10.13234/j.issn.2095-2805.2019.2.132
Keywords:inductive power transfer(IPT)  loosely coupled transformer  battery charging  hybrid topology
Fund Project:Natural Science Foundation of Jiangsu Province
              
AuthorInstitutionEmail
HAN Hongdou State Grid Xuzhou Power Supply Company, Xuzhou , China
JING Yanyan School of Electrical Engineering, Southeast University, Nanjing , China
QU Xiaohui School of Electrical Engineering, Southeast University, Nanjing , China xhqu@seu.edu.cn
XI Kang State Grid Nanjing Power Supply Company, Nanjing , China
ZHOU Kefeng State Grid Nanjing Power Supply Company, Nanjing , China
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Abstract:
      The inductive power transfer(IPT) technique has many unique advantages in applications to electric ve-hicle. However, it is difficult for an IPT transformer to provide the required charging current or voltage for the load battery due to the complicated characteristics associated with transformer parameters, compensation parameters, operating frequency, and load. Especially, the load range of battery varies widely during the whole charging process. To solve this problem, according to the input and output characteristics of four basic IPT compensation structures, the topology and operating condition to simultaneously realize the resistive input impedance and constant-current or constant voltage output are found, thus decoupling the effect of load on output and eliminating the reactive power. To satisfy the battery charging characteristics switching from constant-current mode to constant-voltage mode, a type of hybrid topology is further proposed, which uses the least components to realize the switching between constant-current topology and constant-voltage topology. This circuit is simple and reliable, and has higher transfer efficiency.
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