Transcription of Module 4: DC-DC Converters
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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. Upon examination of the general configurations it can be seen that there are two major power electronic units DC-DC converter DC-AC inverter Figure 1:General Configuration of a Electric Vehicle [1] NPTEL Electrical Engineering Introduction to Hybrid and Electric Vehicles Joint initiative of IITs and IISc Funded by MHRD Page 2 of 55 Usually AC motors are used in HEVs or EVs for traction and they are fed by inverter and this inverter is fed by DC-DC converter (Figure 1).
Buck Converter: In Figure 2a a buck converter is shown. The buck converter is step down converter and produces a lower average output voltage than the dc input voltage. Boost …
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