Design Of 10kW Electric Vehicle Charging Stations' Power Supply

As the serious pressure of the resources and environment, the electric vehicle industry develops rapidly. Under the background, the design process of a power supply module for electric vehicle charging station is presented in this paper.In this paper, the electric vehicle charging and switching power supply technology status and development are introduced. Considered the advantages and disadvantages of various switching power supply topologies, the phase-shift full bridge converter is shelected and its work processes are disscessed in detail. In order to further reduce switching power losses and improve efficiency, the soft-switching technology must be used. The thesis compares the implementation of various kinds of soft switching technologies and their advantages and disadvantages. At last the power system use the method that the leading leg paralleled resonant capacitance to achieve ZVS, the lagging leg realize ZCS by selecting the appropriate DC-blocking capacitors, to reduce the power lossA new IGBT driver circuit, whitch use transformer to supply the power, and use optical coupler to achieve isolation, is proposed. This circuit can supply a positive voltage to switch on the IGBT and negative voltage to switch off the IGBT reliably, and has little interference between each other.Then, the detail design processes of the phase-shift full-bridge converter are presented in the paper, including magnetic components design, power components calculation and selection, hardware and software design. According to the design, A prototype of 1 OkW power supply was implemented and tested.Finally, the experimental result shows that the power supply has good control performances, strong flexibility and reliability, and confirms that the theoretical analysis are accurate.