Abstract：With the rapid development of automation and intelligent technologies, automatic guided vehicles (AGVs) have become a crucial component of modern logistics, manufacturing, and distribution systems. However, traditional AGVs, which rely on battery power, face limitations such as limited operational time, low overall system efficiency, and increased weight. Dynamic wireless power transfer (DWPT) technology has emerged as a promising solution. DWPT allows vehicles to charge while in motion, effectively extending their operational time, reducing the need for large battery capacities, and enhancing the overall system efficiency. However, DWPT still faces significant challenges, particularly power fluctuations caused by lateral misalignment during the operation of small- and medium-power DWPT systems. These power fluctuations are particularly evident when the vehicle crosses segmented intervals along the transmission track. This paper proposes a segmented DWPT system based on micro-energy storage. The system utilizes super capacitors as micro-energy storage units to mitigate power fluctuations, ensuring stable power transmission during operation. A mathematical model of the DWPT system is established using a single-tube LCC-S inverter topology. The relationship between the energy-storage capacitor and the spacing between the transmitting rails is derived. The system implements peak shaving and valley filling techniques to suppress large power fluctuations in the interval areas, maintaining a smooth and continuous power supply. When significant power fluctuations occur due to misalignment, the energy storage capacitor effectively smooths power delivery, ensuring system stability. To further improve the system's anti-offset performance and reduce its weight, a flat solenoid magnetic coupling mechanism with edge enhancement is proposed. This mechanism optimizes the convergence of magnetic field lines at the edges of the rails, reducing power fluctuations caused by rail switching. Additionally, a parameter optimization design method is introduced for the segmented coupling mechanism and a segmented switching control strategy. These strategies enhance the system's overall efficiency and stability, particularly in dynamic, real-time applications where misalignment occurs. A 50 W experimental prototype has been developed. The system can effectively reduce power fluctuations across the segmented intervals along the track. The experimental results also show that the variation in output power during movement aligns closely with theoretical predictions. This study provides a comprehensive evaluation of the proposed segmented DWPT system, offering valuable insights into the design and optimization of high-performance DWPT systems with improved power stability, efficiency, and reduced system weight. In conclusion, this paper presents a novel segmented DWPT system based on micro-energy storage that integrates supercapacitors. A parameter-optimization design is proposed to optimize magnetic coupling. The system significantly alleviates power fluctuations caused by lateral misalignment and segment switching. The system's effectiveness is verified in practical applications, particularly for AGVs and other small-to- medium- power DWPT systems.
张路, 杨奕, 李桂玉, 周钊屹, 林治浩. 一种基于微储能的分段式动态无线电能传输系统[J]. 电工技术学报, 2026, 41(10): 3230-3244.
Zhang Lu, Yang Yi, Li Guiyu, Zhou Zhaoyi, Lin Zhihao. A Segmented Dynamic Wireless Power Transfer System Based on Micro Energy Storage. Transactions of China Electrotechnical Society, 2026, 41(10): 3230-3244.
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2026, Vol. 41 
