Subsystem Design of EV Drive Train - I — Lesson 1

This lesson covers the design of electric vehicle subsystems, focusing on the drive train. It explains the common parts between electric vehicles (EVs) and petrol vehicles, such as the body, frame, doors, power windows, wheels, and suspension system. The lesson also highlights the parts unique to EVs, including the electric motor, controller, battery pack, and vehicle control unit. It further discusses the impact of parameters like rolling resistance, aerodynamic coefficient, vehicle frontal area, weight, slope, pickup acceleration, and regeneration on the design of EVs. The lesson also provides a detailed explanation of how to calculate vehicle torque, speed, and power, and the role of gears in these calculations.

Video Highlights

00:18 - Introduction to Electric Vehicle Subsystem Design
00:47 - Common parts between EV and petrol vehicles
03:51 - Changes in power steering and braking systems in EVs
06:17 - Parts that are removed and added in EVs
07:12 - Importance of electric motor and controller in EVs
15:45 - What are the EV subsystems
19:22 - Importance of torque, speed, and power in characterizing vehicle performance
26:47 - Home assignment
27:13 - Role of gears in EVs and efficiency

Key Takeaways

- The drivetrain is a crucial part of an electric vehicle's design.
- Common parts between EVs and petrol vehicles include the body, frame, doors, power windows, wheels, and suspension system.
- Unique parts to EVs include the electric motor, controller, battery pack, and vehicle control unit.
- Parameters like rolling resistance, aerodynamic coefficient, vehicle frontal area, weight, slope, pickup acceleration, and regeneration impact the design of EVs.
- Calculating vehicle torque, speed, and power is essential in EV design, and gears play a significant role in these calculations.