Thesis on PI Controlled Bi-Directional DC-DC Converter and Highly Efficient Boost Converter for Electric Vehicles
Abstract
Due to the constraint of the fuel the electric vehicle is designed for the modern world. Bidirectional DC to DC converters has significantly enlarged the interest in Electric vehicle applications. The present work aims at designing and modeling of a bidirectional DC to DC converter for driving a DC motor for Electric Vehicle (EV) application. In a conventional bi directional converter PWM (Pulse width modulation) pulse is used for the generation of triggering pulse of the switches. We use PI and PID controller for triggering the IGBTs of DC to DC converter. A comparison is done between the three types of bidirectional dc to dc converter. Then we also design a boost converter over conventional boost converter by using parallel combinations of IGBT and MOSFET for electric vehicle applications. After that we simulate the two mode of electric vehicle. First one is motoring mode and other one is regenerating mode. During motoring operation the bidirectional DC to DC converter operates in the step up mode (boost mode) to provide the energy from the battery to the traction motor while during regeneration the motor acts as a generator and the bidirectional DC to DC converter operates in step down mode (buck mode) to recharge the battery.
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