Wireless Energy Transmission System Based on Coupled Resonance and Novel Space Omnidirectional Coupling Mechanism

doi:10.16628/j.cnki.2095-8188.2024.07.003

Abstract

Abstract:

Aiming at the problem that the transmission power and efficiency drop sharply when the relative positions of the transmitting and receiving bodies in the traditional wireless energy transmission system are offset, a wireless energy transmission system based on coupled resonance and a new type of spatial omnidirectional coupling mechanism is proposed. Firstly, the magnetic field distribution characteristics of the transmitting mechanism are analyzed by finite element simulation, and the receiving mechanism adapted to its magnetic field distribution is designed. The mathematical model of the system is established based on the series-series resonance compensation structure, and the transmission characteristics of the system are analyzed. The optimal output selection method and the transmission characteristics optimization method are put forward on the basis of the system. Finally, the feasibility and validity of the system for multi-degree-of-freedom transmission are verified by experiments. The experimental results show that the output power of the system is maintained at more than 35 W and the transmission efficiency is stable at 60%~75% in the case of multiple angles of the receiving mechanism.

Key words: wireless power transfer, coupled resonance (WPT), multiple degrees of freedom, selection of optimum output method

CLC Number:

TM724

CHEN Wei, DONG Zhenyu, CHEN Chong, LI Zhi. Wireless Energy Transmission System Based on Coupled Resonance and Novel Space Omnidirectional Coupling Mechanism[J]. LOW VOLTAGE APPARATUS, 2024, 0(7): 19-27.

Figures/Tables 17

References 25

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参数	数值	参数	数值
U_dc/V	20	f/kHz	200
L₁/μH	11.73	L₂/μH	11.77
L₃/μH	11.65	L₄/μH	11.90
L₅/μH	20.17	C₁/nF	54.04
C₂/nF	53.86	C₃/nF	54.41
C₄/nF	53.27	C₅/nF	31.43
R₁/mΩ	112	R₂/mΩ	95
R₃/mΩ	98	R₄/mΩ	105
R₅/mΩ	178	R_L/mΩ	20