Analysis and improvement of output power drop of dynamic wireless power transfer systems with transmitting coil switching for inspection robots

Dynamic wireless power transfer (DWPT) has received extensive attention due to its advantages of high security, high convenience, and high efficiency. To solve the problems of the mutual inductance and output power drop of DWPT systems for inspection robots, a new DWPT system with a trapezoidal-rectangular coupler has been proposed. First, the DWPT system topology and the switching strategy of the transmitting coil are introduced. Second, the real-time mutual inductances of the coupler in linear and curved motion are derived. Third, a new trapezoidal transmitting coil is presented. Finally, the performance of the DWPT system with the trapezoidal-rectangular coupler (TRC) is tested and compared to the DWPT system with the rectangular-rectangular coupler (RRC). Experimental results show that the minimum mutual inductance of the TRC is increased by 58.71%, and that the minimum output power is more than doubled in curved motion. Moreover, the mutual inductance drop rates of the TRC in linear and curved motion are reduced by 21.23% and 18.42%, respectively. The output power drop rates of the TRC-DWPT system are reduced by 18.99% and 16.12%, respectively. In addition, the Litz wire consumption is reduced by 8.28% in linear motion.

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Cite this article

[IEEE Style]

Y. Ding, J. Li, L. Wang, C. Wang, G. Zhu, Y. Cheng, T. Yu, "Analysis and improvement of output power drop of dynamic wireless power transfer systems with transmitting coil switching for inspection robots," Journal of Power Electronics, vol. 22, no. 12, pp. 2004-2015, 2022. DOI: 10.1007/s43236-022-00518-7.

[ACM Style]

Yishuo Ding, Jiangui Li, Longyang Wang, Chen Wang, Guofu Zhu, Yuying Cheng, and Tianqi Yu. 2022. Analysis and improvement of output power drop of dynamic wireless power transfer systems with transmitting coil switching for inspection robots. Journal of Power Electronics, 22, 12, (2022), 2004-2015. DOI: 10.1007/s43236-022-00518-7.