Design and optimization of a planar-symmetric magnetic coupling structure for downhole WPT
Source abstract
Abstract
To quantify how planar coil geometry and shielding affect magnetically coupled resonant WPT, a coupling calculation model including magnetic shielding was built and validated using finite-element analysis. A planar-symmetric inner-square–outer-circular coil is proposed. Under equal cross-section and material conditions, it delivers higher mutual inductance and transfer efficiency than conventional windings. To balance coupling, leakage, and weight, an aluminum plate–honeycomb ferrite composite shielding structure was proposed. Comparative experiments confirmed that this composite shielding structure exhibits the strongest anti-misalignment capability. The use of ferrite can enhance mutual inductance by 2.58 times, and the proposed optimized ferrite structure can save 23.3% of ferrite usage on one side without sacrificing system performance. A lab-scale prototype operating at 100 kHz achieves a 100 W peak output with 93.8% efficiency and a surface power density of 0.013 W/mm2. Environmental tests (20–90 °C, 30%–95% RH) show stable output, and the measurements agree with the model, indicating that the proposed planar-symmetric, lightweight coupler is a practical candidate for stratified downhole systems.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Wireless Power Transfer Systems · Innovative Energy Harvesting Technologies · Pulsed Power Technology Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Electronic Information Engineering, Inner Mongolia University 1 , Hohhot 010021,
Inner Mongolia Key Laboratory of Intelligent Communication Sensing and Signal Processing 2 , Hohhot 010021,
Xi’an Institute of Space Radio Technology 3 , Xi’an 710199,
School of Science, Inner Mongolia University of Technology 4 , Hohhot 010021,
Shengli Oilfield Petroleum Engineering Research Institute 5 , Dongying 150080,
Funding
High-level Talent Research Start-up Project
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Show source-provided references
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