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بیست و نهمین کنفرانس مهندسی برق ایران
Bidirectional Isolated DC/DC Dual-Active-Bridge Converters Optimum Soft-Switching Control Method for Electrical Vehicle Applications
نویسندگان :
Shokoufeh Valadkhani
1
Mojtaba Mirsalim
2
Gevork B. Gharehpetian
3
1- دانشگاه صنعتی امیرکبیر
2- دانشگاه صنعتی امیرکبیر
3- دانشگاه صنعتی امیرکبیر
کلمات کلیدی :
Electrical vehicle, Dual-active bridge converter, Bidirectional DAB converter, Zero voltage switching, Variable frequency and duty-cycle
چکیده :
Electrical Vehicles (EV) are suitable alternative to the conventional internal combustion engine (ICE) driven vehicles. The conventional grid-connected EV chargers consist of an AC/DC power factor correction converter and an isolated DC/DC converter connected to the battery. The isolated DC/DC converter is capable of working as a bidirectional converter providing power to the grid in peak hours. During the entire charging process of the EV battery, the voltage varies significantly, and the DC/DC converter should operate under wide input and output voltage range. In this paper, the bidirectional dual-active-bridge (DAB) converter with both full-bridge and half-bridge topologies is studied. In light-load condition, zero voltage switching (ZVS) cannot be achieved. Thus, a switching control method with emphasis on variable frequency and duty-cycle (VFD) is suggested at light-loads to improve overall efficiency. Simulation results verifies the accuracy of this method.
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