Optimizing Levitation Devices for Wireless Power Transfer An Fe-NCS Grid Structure Approach

DOI link: 10.1109/TPEL.2023.3296521

Keywords: Wireless Power Transfer, Electromagnetic Force, Levitation Device, Fe-NCS Grid Structure, Particle Swarm Optimization.

What - Clarification of the Core Content:

• This study presents a method for driving a microdisplacement device in the coupling space of a WPT system utilizing a levitation device made from Fe-based nanocrystalline alloys (Fe-NCS) combined with aluminum. The dynamic model of the levitation device is analyzed to understand the involved EMF, and an optimized grid-type Fe-NCS structure is proposed for stable levitation and weight reduction. The optimization employs a variable acceleration particle swarm optimization (VA-PSO) algorithm.

Why - Analysis of the Purpose:

• The study aims to enhance the average horizontal velocity of the levitation drive and achieve stable levitation by optimizing the structure of the levitation device, which is crucial for the safe and efficient operation of WPT systems.

How - Description of the Methods Used:

• A mathematical model for the EMF acting on the levitation device is developed, considering the material properties and dimensions.
• A 3.7-kW prototype with a 100-A input current is constructed to validate the optimized design, showcasing an increased average horizontal velocity and stable levitation.

Key Findings and Insights:

• The optimized grid-type structure effectively enhances the average horizontal velocity of the levitation drive to 9.3 cm/s.
• The proposed structure achieves stable levitation, overcoming the instability issues associated with fully coated Fe-NCS devices of larger sizes.

Examples of Critical Solutions Proposed:

• The introduction of a grid-type Fe-NCS structure that leverages the VA-PSO algorithm for optimization leads to improved performance in both stable levitation and horizontal displacement.

Research Gaps and Future Work:

• While the study successfully optimizes the levitation device for enhanced performance, the potential for further refinement in material selection and structural optimization remains, considering practical engineering constraints and higher power applications.

Recommended citation: Fengxian Wang, Qingxin Yang, Xian Zhang, Zhaoyang Yuan, Xuejing Ni. Optimizing Levitation Devices for Wireless Power Transfer An Fe-NCS Grid Structure Approach. IEEE Transactions on Power Electronics. 38(10).
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