研究目的
Analyzing the control strategy for dynamic wireless power transfer in electric vehicles based on independent control of the primary and secondary sides to maintain constant charging current despite variations in coupling and battery resistance.
研究成果
The proposed independent control strategy using PID controllers effectively maintains constant charging current in dynamic wireless power transfer for electric vehicles, with fast regulation time and minimal overshoot. The method is reliable under varying mutual inductance and battery resistance, demonstrating its suitability for applications without real-time feedback between primary and secondary sides.
研究不足
The study is based on simulation in MATLAB, not physical experimentation. It assumes ideal conditions and does not address practical issues like electromagnetic interference, thermal effects, or real-world implementation challenges. The parameters are fixed in simulation, which may not fully capture dynamic variations in a real system.
1：Experimental Design and Method Selection:
The study uses a dynamic wireless power transfer system with SS compensation topology. Modeling is done using switch averaging theory and state space averaging method for the primary and secondary circuits, respectively. PID controllers are designed based on the derived transfer functions to regulate duty cycles of buck circuits for constant current control.
2：Sample Selection and Data Sources:
Simulation is conducted using MATLAB with parameters from an experimental platform, including inductance, capacitance, resistance, and mutual inductance values.
3：List of Experimental Equipment and Materials:
Includes components such as coils, capacitors, resistors, buck circuits, and a battery. Specific models and brands are not detailed in the paper.
4：Experimental Procedures and Operational Workflow:
The system is simulated under varying mutual inductance (from 9 μH to 11 μH and 7 μH) to mimic electric vehicle motion. The PID controllers adjust duty ratios to maintain constant primary coil current and battery charging current.
5：Data Analysis Methods:
Bode plots are used to analyze system stability and performance before and after compensation. Simulation results include charging current, voltage, and state of charge (SOC) of the battery.
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