Seminar Details

Seminar Title
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Design of High power Bidirectional Interleaved DC-DC Converter for EV Applications
Seminar Type
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Progress Seminar
Department
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Electrical Engineering
Speaker Type
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Student
Speaker Name
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YEDUKONDALU GUTTULA ( RollNo : 518EE1012)
Date  &  Time
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09 Apr 2021  16:30
Venue
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Online MS-Teams (Code: flxgymu)
Contact
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Prof. Susovon Samanta
Abstract
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The Electric Vehicle (EV) drivetrain includes a motor drive system and battery system.  A dc-dc converter can be inserted between the battery pack and the DC-link connected to the inverter. To meet the industrial applications the dc-dc converter must be designed for a high power rating. For high power applications, the inductor design plays an important role in the conventional step-up converter. The size of the inductor depends on the current rating and the core material. To improve efficiency and to reduce the volume of the core, the interleaved technique is used. Interleaving is the process to operate the N number of converters connected in parallel with the TS/N phase shift. Batteries are primarily used for storage, most of the batteries are designed to have good energy density. However, for automotive applications, storage devices should have good power density, to satisfy the acceleration requirement and it should have good energy density for sufficient drive range requirement. Batteries can be designed to have either good energy density or good power density, but not both together. It is achieved by a hybrid energy storage system (HESS) which consists of different electrical storage devices with complementary characteristics. UC is a high power density device so, this can assists batteries to supply/absorb transient power demands in HESS. A two-phase interleaved bidirectional converter (IBC) has been designed to maintain dc-link voltage for battery and UC. Power split between battery/UC is achieved by the frequency sharing method. Both the converters have been operated in continuous current mode (CCM). Simulations have been tested for 10 kW power level in SIMULINK/MATLAB. The prototype has been developed for a 5kW power level.