• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 25 Issue 5
Oct.  2012
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Article Contents
XIA Chenyang, ZHANG Yanbing, WU Xiaojie, SUN Yue, ZUO Lan, LI Chaowei. Contactless Power Transfer System with Stabilized Frequency and High Efficiency Based on Impedance Conversion[J]. Journal of Southwest Jiaotong University, 2012, 25(5): 814-819. doi: 10.3969/j.issn.0258-2724.2012.05.013
Citation: XIA Chenyang, ZHANG Yanbing, WU Xiaojie, SUN Yue, ZUO Lan, LI Chaowei. Contactless Power Transfer System with Stabilized Frequency and High Efficiency Based on Impedance Conversion[J]. Journal of Southwest Jiaotong University, 2012, 25(5): 814-819. doi: 10.3969/j.issn.0258-2724.2012.05.013

Contactless Power Transfer System with Stabilized Frequency and High Efficiency Based on Impedance Conversion

doi: 10.3969/j.issn.0258-2724.2012.05.013
  • Received Date: 07 Sep 2011
  • Publish Date: 25 Oct 2012
  • Aimed at the problem that the variation of load resistance can seriously affect the resonant frequency and efficiency of a contactless power transfer (CPT) system, a stabilized frequency and high efficiency CPT system design method based on impedance conversion was put forward to improve its frequency stability and efficiency. According to the theory that switching converters can realize impedance conversion, a switching converter was added to the secondary circuit, the duty cycle of the converter was controlled to realize the equivalent impedance conversion, and the resonance compensation parameters of the CPT system were optimized for achieving stable frequency and high efficiency. Through resonance compensation and impedance conversion analysis, the calculation equations for the key parameters were built up, and the analytical resolution of the switch duty cycle and the load resistance were obtained. Experimental result shows that when the resistance changes from 1 to 10 Ω, the efficiency of the CPT system can always keep 67.0% through adjustment of the duty cycle.

     

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