Design of Multiport DC-DC Converter for Electric Vehicles
Electric vehicles (EVs) are becoming more popular as this technology decreases reliance on fossil fuels and reduce emission of greenhouse gases. These vehicles are partially or fully powered on electric power instead of fuel that’s why they are more environmental friendly. But battery life of electric vehicles gets disturbed by the abrupt power changes during the event of acceleration. These power fluctuations affect lifetime of battery.
To overcome this problem, a system is proposed in our Final Year Project. This project aims to design a multiport dc-dc converter with decoupled control which will work by supplying power to the connected load from two input power sources i.e. battery and super capacitor. These power sources will deal with swift power changes. Battery will be supplying power in steady whereas super capacitor will supply power in transient state. These states are controlled by the use of a microcontroller. Battery is supplying 55V input to H-Bridge inverter. Each pair of MOSFET works in positive and negative half-cycles, respectively, and we get alternating square waveforms. The output of H-Bridge inverter is given to transformer. The isolated transformer steps up the 55V to 220V and fed to full-wave bridge rectifier, which rectifies AC to DC. Then this 220V DC is passed to the 3-phase inverter, which will convert DC to three phases of AC and run the motor load. In parallel to it, another input source, i.e., supercapacitor, will deliver power in a transient state. This input port is also connected to another H-Bridge inverter. Then the output of the H-Bridge inverter, i.e., alternating square waveform, and transformer will step this voltage up to 220V AC. Then the output from the battery and supercapacitor portion will be gathered after the transformer and passed to the rest of the circuit to run the motor load.
Keywords: Decoupled control, H-Bridge Inverter, 3-Phase Inverter
Tools: Proteus Software , PCB for hardware
Department: Department of Electrical Engineering
Project Team Members
| Name |
Email |
|
Zanib Meharban
|
Zanib2018@namal.edu.pk |
|
Muhammad Uzair Nasir
|
uzairn2018@namal.edu.pk |
Project Poster
