Relationship between Electromagnetic Shielding Structure Parameters, Self Inductance, Mutual Inductance, and Magnetic Field Emission of Wireless Power Transfer Coupling Coils in Satellite

Wireless Power Transfer(WPT) is an extremely important direction in modern electrical science and technology development, which has been practically applied in multiple fields. In recent years, satellite-based wireless power transfer technology has also gradually been recognized as an effective means to enhance the reliability of power distribution systems and improve the accuracy of payload observation. However, due to the relatively concentrated sensitive equipment on satellites and the relatively high electromagnetic compatibility (EMC) requirements, it is necessary to design additional electromagnetic shielding for the coupling coils in WPT systems to avoid interference with sensitive equipment onboard. This paper summarizes the experiences and approaches in electromagnetic shielding design for WPT coupling coils in existing research. By using the method of controlling variables, various models of coupling coils with different electromagnetic shielding structures are established. Through finite element analysis, the relationship between the equivalent models of self inductance, mutual inductance, magnetic field emission, and the parameters of electromagnetic shielding structures is explored. Subsequently, a set of preferable designs is selected to build a circuit model of a high-power satellite-based near-field WPT system based on LCC/S compensation topology in MATLAB Simulink. The simulation results show that the WPT system can achieve stable energy transmission at high power level of 4782 watts.