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Module 4: DC-DC Converters

NPTEL Electrical Engineering Introduction to Hybrid and Electric Vehicles Joint initiative of IITs and IISc Funded by MHRD Page 1 of 55 Module 4: DC-DC Converters Lec 9: DC-DC Converters for EV and HEV Applications DC-DC Converters for EV and HEV Applications Introduction The topics covered in this chapter are as follows: EV and HEV configuration based on power Converters Classification of Converters Principle of Step Down Operation Buck Converter with RLE load Buck Converter with RL load and Filter Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV) Configurations In Figure 1 the general configuration of the EV and HEV is shown.

The principle of step down operation of DC-DC converter is explained using the circuit shown in Figure 3a. When the switch S 1 is closed for time duration T 1, the input voltage V in appears across the load. For the time duration T 2 is switch remains open and the voltage across the load is zero. The waveforms of the output voltage across the ...

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