Portfolio Project

• Design of Electric Power-train for an Anti-dust Heavy Goods Vehicle

• Nov 2019 - Jan 2020

In this project a modification of an existing water spraying “Heavy Goods Vehicle” (HGV) powered by an internal combustion engine with diesel fuel type is carried out. The primary objective of the project is to modify an existing commercial HGV by changing the vehicle drivetrain from internal combustion to electric power provided by a lithium iron phosphate battery. For this, a complete selection of Electric motor, Battery selection (& Sizing) and a kind of architecture specific for this electric vehicle has been developed. Initially, I have developed a Longitudinal Dynamic Model for an ideal Heavy Goods vehicle subjected to external forces such as Rolling resisting force, Aerodynamic drag force, Gradient Resistance and very significantly the Inertial forces. Upon succession, I have defined an appropriate “Trapezoidal Speed” profile for an entire cycle of operation of the vehicle per run. By considering these factors, we have designed the Battery sizing both qualitatively and quantitatively. Another very important aspect of “Electric powertrain design” is the “Motor Sizing”, generally, in EVs single-speed transmissions are adopted in comparison to conventional ICEs. By considering a set of system constraints, “Transmission-ratio” and the compatible “Electric Motor” has been selected. On further, for the selected “Electric Motor”, the electrical parameters have been evaluated by considering a “Vector Model Approach”. On further, appropriate “Electrical Drive” has been defined by taking into account the configuration and type of Electric motor adopted. Consequently, an appropriate “Thermal Management” has been defined by considering the power losses in Motor & Inverter to evade potential degradation of the powertrain performance. Finally, the Regenerative braking system has been addressed by considering the “Kinetic energy Recovery system”. In conclusion, I have also shown the precedence of the developed powertrain for HGV even in terms of eco-sustainability by taking into account the emissions.