This paper presents the design and implementation of an impedance compression network (ICN) to correct distance variation or misalignment between coils in wireless power transfer (WPT) systems. Magnetic resonant coupling (MRC) coils provide high efficiency for charging mid-range WPT applications. However, a distance variation or misalignment between coils causes a coil-impedance change and significantly affects performances of WPT systems. In order to mitigate a coil-impedance variation, we propose an ICN simultaneously compressing changes in magnitude and phase of impedance. The ICN consists of a resistance compression network (RCN) and phase compression network (PCN). While the RCN effectively compresses the variation in the magnitude of impedance by using one pair consisting of an inductor and a capacitor, the PCN is designed using a Smith chart to reduce a phase variation.
|Original language||English (US)|
|Title of host publication||2017 IEEE 18th Workshop on Control and Modeling for Power Electronics, COMPEL 2017|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Aug 18 2017|
|Event||18th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2017 - Stanford, United States|
Duration: Jul 9 2017 → Jul 12 2017
|Name||2017 IEEE 18th Workshop on Control and Modeling for Power Electronics, COMPEL 2017|
|Other||18th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2017|
|Period||7/9/17 → 7/12/17|
Bibliographical noteFunding Information:
The authors thank Mr. Ryouhei Tanaka from Daihen Corporation for providing funding for this work through the Stanford’s System-X Alliance through its Faculty Mentor Advisor (FMA) research program.
© 2017 IEEE.