Journal article
A High-Efficiency and Long-Distance Power-Relay System With Equal Power Distribution
IEEE journal of emerging and selected topics in power electronics, v 8(2), pp 1419-1427
Jun 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This paper proposes a wireless power repeater system for long-distance and multiple-load applications with equal power load at each repeater. Each repeater performs as a power relay that not only receives and transmits power but also supplies power to its local load. The main contribution of this paper is to provide the design methodology of a distributed power-relay system. First, it provides the mathematical model of the power distribution among the power relays, indicating that the inductances and resistances can affect the power distribution. Second, it provides the power transfer capability of a power-relay system based on the quality factor and efficiency requirement, indicating the maximum achievable number of power relays in a system. Aiming at practical applications, this paper provides the guideline for the circuit parameter design to achieve equal power distribution. Two typical examples are proposed to realize equal power distribution. The identical M n and different R n examples are selected for implementation. The coil size is 400 mm × 400 mm, and the eight power relays achieve a transfer distance of 3.2 m with a total power of 760 W and an efficiency of 70%. Experimental results validate that equal power distribution is achieved for the multiple loads across a long distance. Each power relay dissipates about 95-W power in its local load with a power variation limited to ±2%.
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Details
- Title
- A High-Efficiency and Long-Distance Power-Relay System With Equal Power Distribution
- Creators
- Fei Lu - Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA, USAHua Zhang - Drexel UniversityWeiguo Li - State Grid Corporation of ChinaZhe Zhou - State Grid Corporation of ChinaChong Zhu - San Diego State UniversityChenwen Cheng - San Diego State UniversityZhanfeng Deng - State Grid Corporation of ChinaXi Chen - Global Energy Interconnection Research Institute North AmericaChunting Chris Mi - Drexel University
- Publication Details
- IEEE journal of emerging and selected topics in power electronics, v 8(2), pp 1419-1427
- Publisher
- IEEE
- Grant note
- GEIRI-DL-71-17-011 / Global Energy Interconnection Research Institute Co. Ltd., through the State Grid Sci and Tech Project “Research on the Magnetic-Resonant Wireless Power Transfer Technology for the High-Voltage Converter Valve in FACTS”
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000534642200041
- Scopus ID
- 2-s2.0-85084762004
- Other Identifier
- 991019168228204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Electrical & Electronic