HUANG Xiaofan, LI Kangwen, DAI Ruipeng, et al. The analysis and verification of the best efficiency point of long distance wireless energy transmission System[J]. Eletric Welding Machine2020, 50(6): 127-131.DOI: 10.7512/j.issn.1001-2303.2020.06.25.
For the common inefficient transmission problem in the existing long distance magnetic coupling resonant wireless power transmission system
the resonant topology circuit structure
coil coupling coefficient
coil internal resistance and other factors of the transmission system are comprehensively analyzed.Impedance matching and shielding methods are adopted.Through modeling analysis of series resonance and calculation of transmission efficiency
the matching impedance value of the maximum efficiency point is obtained. The aluminum plate is used to surround the coil to reduce leakage flux
thus reducing transmission loss. Through theoretical analysis
simulation and experimental verification
the maximum wireless power transmission efficiency is 78.9% when the transmission distance is 1 meter and the impedance matching load is 53Ω.