scholarly journals Inhomogeneous Winding for Loosely Coupled Transformers to Reduce Magnetic Loss

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Jing Zhou ◽  
Jiazhong He ◽  
Fan Zhu
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Magnetic Loss ◽  
Wireless Power Transfer ◽  
Homogeneous Magnetic Field ◽  
Magnetic Field Distribution ◽  
Width Ratio ◽  
Power Transfer ◽  
Wireless Power ◽  
Loosely Coupled

Wireless power transfer has been proved promising in various applications. The homogeneous winding method in loosely coupled transformers incurs unnecessary intense magnetic field distribution in the center and causes extra magnetic loss. An inhomogeneous winding method is proposed in this paper, and a relatively homogeneous magnetic field distribution inside the core is achieved. This paper investigated the magnetic loss of homogeneous winding and inhomogeneous winding for wireless power transfer. A theoretical model was built to evaluate magnetic loss under inhomogeneous winding. The coupling coefficient and magnetic loss were investigated individually and comparisons were made between different width ratio combinations. Theoretical analysis was validated in experiments.

scholarly journals A Reconfigurable Coil grid for Receiver Localization in Wireless Power Transfer and Magnetic Field Steering

2020 ◽  
pp. 1-1
Author(s):  
Jaafar Al Sinayyid ◽  
Hakim Takhedmit ◽  
Patrick Poulichet ◽  
Marjorie Grzeskowiak ◽  
Antoine Diet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power

scholarly journals Tuning of a wireless power transfer system with a hybrid capacitor array

2016 ◽  
Vol 3 (1) ◽  
pp. 9-14
Author(s):  
Nurcan Keskin ◽  
Huaping Liu
Keyword(s):  
Resonant Frequency ◽  
Hybrid Model ◽  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Loosely Coupled ◽  
Capacitor Array ◽  
Power Transfer Efficiency ◽  
Wireless Power Transfer System

Power transfer efficiency in loosely coupled inductive systems can be enhanced by resonance. Primary and secondary can be tuned to same resonant frequency. In this paper, MOSFET-based Varactors and switchable capacitors are used for re-tuning of such a system at 13.56 MHz. This is achieved either using each cap structure alone or as a hybrid model. These techniques are designed for 13.56 MHz wireless power transfer system.

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