Electric Vehicle Battery Charging Using a Non-Isolated Bidirectional DC-DC Converter Connected to T-Type Three Level Converter

kground and Objectives: {R۱-۱} Increasing environmental problems have led to the spread of Electric Vehicles (EVs). One of the attractive research fields of electric vehicles is the charging battery of this strategic product. Electric vehicle battery chargers often lack bidirectional power flow and the flexibility to handle a wide range of battery voltages. This study proposes a non-isolated bidirectional DC-DC converter connected to a T-type converter with a reduced number of switches to solve this limitation.Methods: The proposed converter uses a DC-DC converter that has an interleaved structure along with a three-level T-type converter with a reduced number of switches and a common ground for the input and output terminals. Space vector pulse width modulation (SVPWM) and carrier based sinusoidal pulse width modulation (CBPWM) control the converter for Vehicle to grid (V۲G) and grid to Vehicle (G۲V) operation, respectively.Results: Theoretical analysis shows ۹۶.۹% efficiency for ۱۵.۸kW output power and ۳.۰۶% THD during charging with low battery voltage ripple. In V۲G mode, it achieves an efficiency of ۹۶.۵% while injecting ۰.۵ kW of power into the ۳۸۰ V ۵۰ Hz grid. The DC link voltage is stabilized. The proposed converter also provides good performance for a wide range of battery development.Conclusion: The proposed converter offers high efficiency and cost reduction. It provides the possibility of charging a wide range of batteries and provides V۲G and G۲V power flow performance. The proposed converter is capable of being placed in the fast battery charging category. The ability to charge two batteries makes it a suitable option for charging stations.

کلیدواژه ها:

Electric Vehicle ، Battery Charger ، Non-Isolated Bidirectional DC-DC Converter ، T-Type Three-Level Converter ، Charging Station