Optimal design of the rectangular transmission coils for dual-load wireless power transfer system

Area of Science:

• Electrical Engineering
• Electromagnetics
• Wireless Power Transfer

Background:

• Wireless Power Transfer (WPT) systems are increasingly adopted for charging devices.
• Efficient coil design is crucial for optimizing WPT system performance and cost.
• Dual-load WPT systems require specialized coil designs to manage multiple receivers.

Purpose of the Study:

• To present a systematic design methodology for transmission coils in dual-load WPT systems.
• To develop an accurate and efficient modeling approach for rectangular WPT coils.
• To optimize coil dimensions for cost-effectiveness and performance.

Main Methods:

• Established system circuit and mathematical dimension models for coupling coils.
• Compared Finite Element Method (FEM), greenhouse formula, and Backpropagation Neural Network (BPNN) for inductance calculation.
• Selected a hybrid FEM-BPNN method for accurate coil inductance modeling and geometric mapping for dimension determination.

Main Results:

• Developed a hybrid FEM-BPNN model demonstrating high accuracy for rectangular coil inductance prediction.
• Determined the relationship between coil size, turns, and inductance for efficient design.
• Identified optimal rectangular coil dimensions through geometric mapping and cost estimation.

Conclusions:

• The proposed systematic design method, utilizing a hybrid FEM-BPNN approach, offers an efficient and accurate solution for dual-load WPT rectangular coils.
• The methodology enables precise determination of coil parameters, leading to optimized system performance and cost.
• Simulations and experimental verifications confirm the validity and effectiveness of the presented design strategy.