WIRELESS CHARGING AND POWER MANAGEMENT SYSTEM FOR ELECTRIC VEHICLES USING DUAL INVERTER DRIVES

Abstract

EVs are becoming more prevalent and there is a need for reliable, efficient, convenient charging technology. To remove the need for physical charging connectors and enhance safety, convenience and durability, a new solution has been developed, Wireless Power Transfer (WPT). The standard wireless charging systems, however, require additional power electronic converter, communication module and charger controller on the vehicle, increasing the weight, cost and complexity of the car. The objective of this project is to address these issues by designing an Integrated Wireless Charging Receiver for EV with Dual Inverter Drives and charge the vehicle's battery by utilizing the existing components in the drive train. The proposed system is open-winding electric motor, dual-inverter drive topology and wireless charging receiver. The traction inverter and motor drive electronics that already exist in the vehicle help to minimize the need for special on-board charging equipment. The architecture features an excitation compensated receiver coil, capacitors and diodes for efficient transfer of wireless energy with minimal switching losses, thermal stress and electromagnetic interference. Additionally, the design ensures high frequency charging currents are kept away from sensitive parts of the drivetrain, enhancing system reliability and efficiency. The proposed system is validated with simulation with 6.6 kW wireless charging system with an electric vehicle powertrain of 110 kW. The simulation results demonstrate the efficient power transfer, less hardware requirement, better energy utilization and maximum charging efficiency of 94.3% for separation distance between coils 200 mm. The designed integrated charging architecture is an economic, light-weighted and high performance solution for the next generation’s electric vehicle charging applications.