Final Project: Design of an Electric Vehicle
Here we designed an Electric car model with the help of a power train block set where a self-defined drive cycle is given, pre-defined driver block is connected.
The sequence of the modeling of the car followed here is :
Drive Cycle --> Longitudinal Driver --> Charge controller (Main system) --> Electrical Motor --> vehicle Body(Main system)
Blocks Used:
- Constant
- Slider Gain
- Predesigned Longitudinal Driver
- Drive Cycle Source
- H-Bridge
- DC Motor
- Wheels
- Controlled PWM Voltage
- Rate Transistion
- Gain
- Discrete Time Generator
- Sum
- Product
- Input/Output Ports
- Solver Configuration
- Converters
- Simple Gear
- Vehicle Body
- PS Terminator & PS Constant
Above is the full vehicle model.
Now we will go through each block with parameters assigned.
Here we considered different types of drive cycle i.e., FTP75 drive source.
Now we have a predesigned driver block that can be connected to control the vehicle
It is a command center to control our vehicle with necessary commands.
For simscape block connection considered in designing a vehicle, we connected H-Bridge and controlled PWM voltage source for power supply to the vehicle.
Here at every stage current and voltage are measured to know the variation in parameter values, the output terminals of the H-Bridge are given to the DC motor connected after the charge controller.
Battery & SOC:
DC Motor:
The DC motor is like a middle-ware between the charge controller and vehicle body which is the main source for working of the car.
Vehicle Body:
The wheels in the body are connected to the motor for propulsion. A fixed gear is connected to the body for an electric vehicle.
5 is the fixed gear ratio assigned for a vehicle.
Body parameters:
Now the mass and radius of the wheels are determined depends on the output required for the vehicle.
The velocity generated in the vehicle body block is fed back to the driver block to control the vehicle accordingly.
Output of the Vehicle's velocity and SOC are pasted below:
