Final Project: Design of an Electric Vehicle

Aim:

To understand energy analysis of EVs on different drive cycles.

In this model an electric bike is used to understand the various energy requirements.

The various blocks used are

Drive cycle:It is used to give referrence drive cycle that is the input.

Tire:

The tire(magic formula) block is used for tire.

Gear:

Simple gear is used to transfer the output torque from motor to the tire.

DC motor

The output torque is produced with the help of DC motor

Vehicle body:

The vehicle body is used is used to represent the body of vehicle.

H-bridge

The h-bridge is used to control the speed as well as direction of dc motor according to the input signals given by the pwm signals.

Controlled PWM voltage.

This is used to give the control signals to the input of H-bridge

Generic battery:

It is used to provide the power for the dc series motor.

Longitudinal driver:

It acts as a driver to give the necessary acceleration and brake commands.

Energy block:

It is a subsystem having the blocks to calculate the energy required

Circuit

The input is given by reference cycle FTP75.The ouput velocity from the vehicle body is fed back to the input of longitudinal driver.The longitudinal driver block is used for the purpose of driver where the function of a driver is done by the longitudinal driver.The driver block accelerates and deccelerates according to the input FTP75 cycle.The contoller used to control the speed of the motor is H-bridge.

Results

The output graph is plotted and the SOC of battery is analysed and is decreasing with respect to time.

The output graph of velocity is also shown the output is following the input drive cycle.

Conclusion

The Ev model has been created with Simulink and the model simulated with drive cycle source (FTP575(2474sec)).The results of vehicle velocity with respect to acceleration and state of charge as well as the distance traveled in simulation time is obtained The vehicle traveled 6.56 km in 2474 sec with 61.07% SOC