2018 Electronic Competition Question C-Wireless Charging Electric Car (Xidian University)

This team designed and produced a wireless charging electric vehicle. The system uses DC-DC conversion circuit and wireless charging device as the core, uses farad capacitor as the energy storage device, uses a coreless motor to drive the car, and uses PMOS control to make the car automatically start when the wireless charging transmitter stops charging. The reasonable bridge rectifier circuit of the receiving device effectively reduces energy loss, and the DC-DC conversion circuit adopts the energy-saving mode of TPS63020 to further reduce power consumption. Based on theoretical analysis and practical experiments, the optimal capacitance value and series-parallel connection method of farad capacitors are obtained. The car body uses lightweight PLA material as much as possible, and the core frame of the load-bearing part is 3D printed by itself. The gear transmission structure is designed to reduce the friction of the transmission and reduce energy loss. The motor selection is optimized based on the torque and power requirements, and a single motor rear-wheel drive mode is adopted, which not only saves energy but also improves the climbing ability. After cascading and debugging, the system completed all the requirements of the question and was optimized as much as possible to improve efficiency.