Uniform magnetic field distribution of a spatially structured resonant coil for wireless power transfer

2012 ◽  
Vol 100 (21) ◽  
pp. 214105 ◽  
Author(s):  
Wang-Sang Lee ◽  
Han Lim Lee ◽  
Kyoung-Sub Oh ◽  
Jong-Won Yu
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Uniform Magnetic Field ◽  
Wireless Power Transfer ◽  
Magnetic Field Distribution ◽  
Power Transfer ◽  
Wireless Power

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 Optimization of a Two-Layer 3D Coil Structure with Uniform Magnetic Field

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Davor Vinko ◽  
Domagoj Bilandžija ◽  
Vanja Mandrić Radivojević
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Field Distribution ◽  
Uniform Magnetic Field ◽  
Optimization Method ◽  
Magnetic Field Distribution ◽  
Wireless Power ◽  
Average Magnetic Field ◽  
Coil Structure

Conventional magnetically coupled resonant wireless power transfer systems are faced with resonant frequency splitting phenomena and impedance mismatch when a receiving coil is placed at misaligned position. These problems can be avoided by using uniform magnetic field distribution at receiving plane. In this paper, a novel 3D transmitting coil structure with improved uniform magnetic field distribution is proposed based on a developed optimization method. The goal is to maximize the average magnetic field strength and uniform magnetic field section of the receiving plane. Hence, figures of merit (FoM1 and FoM2) are introduced and defined as product of average magnetic field strength and length or surface along which uniform magnetic field is generated, respectively. The validity of the optimization method is verified through laboratory measurements performed on the fabricated coils driven by signal generator at operating frequency of 150 kHz. Depending on the allowed ripple value and predefined coil proportions, the proposed transmitting coil structure gives the uniform magnetic field distribution across 50% to 90% of the receiving plane.

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
Sign in / Sign up

Export Citation Format

Share Document