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| Electromagnetic Force Suppression of the Coupling Mechanism Structure of WPT System Based on Phase Difference Control |
| Wang Fengxian1,2, Zhang Xian1,2, Yang Qingxin1,2, Sha Lin3, Ren Nianzhen3, Fu Zhiyuan3 |
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;
2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei Vniversity of Technology Tianjin 300130 China;
3. Key Laboratory of Intelligent Control of Electrical Equipment Tiangong University Tianjin 300387 China |
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Abstract The wireless power transmission system operating in the high-frequency electromagnetic field environment is subjected to electromagnetic force, and the long-term action will cause damage to the magnetic shield structure, coil deformation, and insulation damage. This article is about weakening the influence of structure electromagnetic force on the coupling mechanism of wireless power transmission system. First, analyze the structural electromagnetic force characteristics of the coupling mechanism of the wireless power transmission system from the perspective of frequency domain, and determine the relationship between the structural electromagnetic force characteristics and the phase of the current flowing through the coupling coil. Second, a structural electromagnetic force suppression scheme based on phase difference control is proposed. Using a two-wire parallel coupling structure, by adjusting the inductance of the adjustable branch connected in series to a certain transmitting coil branch, the phase of the current flowing through the coupling coil can be adjusted. Finally, the macroscopic force performance of the coupling mechanism is weakened. At the same time, an experimental platform was built to verify the effectiveness of the method.
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Received: 01 November 2020
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2022, Vol. 37 
