The project consist of a semi-automatic Electric Motorbike to be made with the aim of covering 150 Km in one charge. This motorbike doesn?t consist of any clutch or pressure and clutch plates in contrast it consist of an Induction Motor which act as an engine of the vehicle and a dry cell rechargeab
Design and Devise Fully Electrical Powered Two Wheel Vehicle
The project consist of a semi-automatic Electric Motorbike to be made with the aim of covering 150 Km in one charge. This motorbike doesn’t consist of any clutch or pressure and clutch plates in contrast it consist of an Induction Motor which act as an engine of the vehicle and a dry cell rechargeable battery which provide power to the motor. Moreover for additional features the motorbike will consist features such as live tracking using GPS to the android application, battery health indicator, Speakers to provide Exhaust sound to engage the riders and Riding modes
The main idea of the project is to turn it into a business model for the state as paper reports that almost all the Europe will shift to EVs till 2030 and for our state Pakistan it is predicted that our country must shift towards EVs in order to survive in the automobile sector till 2040. Now that we know that Pakistan doesn’t actually own any automobile company, in fact huge amount of our GDP go vain in importing the automobiles. Now think if after 20 years we are importing Electric Vehicles from Other countries like Japan, USA & China like we are now importing gasoline vehicles
Pakistan's Motor Vehicles Sales recorded 11,231 units in Oct 2019, compared with 12,083 units in the previous month. This is the case of Cars and SUVs. In countries like Pakistan the sales of motorcycle are far greater than the sales of cars, the reason is simple, the price of the cheapest new CD70 motorcycle is $323.52 to $355.87 where as for the cheapest cars in the showrooms now is New Suzuki Alto VXR which is of almost $9850. This difference justify enough the increase of sales of motorbikes compared to cars
We have selected EV in shape of a two wheeler because of two major reasons
Frame is the most important part off the vehicle as all the other components mount on it. So according to our modifications we have selected double cradle frame for the electric motorcycle for the following reasons
Electric motorcycle need 3 primary items to make it run
According to our study an induction motor of 3KW-4KW motor is enough to run a motorbike with maximum load of 150kg on it, Induction motors runs on the principle of BLDC motors but we give DC to the Rotor and AC to the outside coils
The use of induction motor is after the calculation of the maximum speed of the vehicle, the maximum load it can bare.
The coefficient of drag and coefficient of frictions are calculated earlier so that we can choose the motor and battery combination
We are using a chain drive system in the vehicle unlike the hub motor system the reason is that using hub motor you can’t achieve the maximum torque required for the maximum velocity
Previously made Electric bike with hub motor find it difficult to reach it maximum speed with suitable load on them this is actually why we are putting a chain drive mechanism in our vehicle
The vehicle will be ride using a throttle accelerator at the handle of the vehicle as it come in traditionally
For our vehicle we need a durable battery which support the motor with this load. The combination of series and parallel of lithium ion batteries are most suitable for the EVs in this care because of the following reasons
Using the formula: E= QVN
Where
E is the energy output
Q is the Amp hours
V is the Voltage
N is the number of batteries
The energy required for one charge found as KWh. This is how we refer to the capacity of our vehicle
We will be using a Blushless DC motor Electric Speed Controller with Rated Voltage of the motor Volts, the power should be more than that of the motor so maintaining the factor of safety. This current to the controller will be controlled through the handle throttle
This project will result in
In addition one of the issues of motorbike accidents is that people forget to slide their side stands back in place on starting the bike. So we propose an automated side stand slider system that will automatically slide the side stand back in position when user starts his/her bike
The motorcycle is so designed that it won’t start until the rider put on the helmet, this will be done to avoid the damage cause by the accidents as a factor of safety
The Motorcycle will contain a fire extinguisher in the hood as the vehicle is carrying a lithium ion battery pack, which act as a bomb if damage and due to the poor traffic management in the state road accidents are obvious, in order to avoid the damage of fire, the rider is provided with a fire extinguisher to put out the fire if occur
Following Calculations are done with actual extracted data from the design of the vehicle
| Rolling Friction | |
| Fr=C x Mass x Acceleration due to gravity | |
| Vehicle weight | 100Kg |
| Rider weight max | 150Kg |
| Total Weight | 250Kg |
| Rolling resistance coefficient for asphalt road | 0.004 |
| Rolling Friction | 9.81 Newton |
| Drag Force | |
| Fd=Cd x 1/2 x P x (v x v) Area | |
| Drag coefficient for bike | 0.88 |
| Density of Air | 1.2 kg/m3 |
| max velocity | 33.33m/s |
| Area frontal | 0.6 m2 |
| Drag Force | 35.2 Newton |
&l
| Power | ||
| P=(Total force) x Velocity/Efficiency | ||
| Total force | 9.81+35.2= 45 Newton | |
| Efficiency | 0.85 | |
| Velocity | 33.33m/s | |
| Power | 1764.9 watts | Approx= 2000 Watts |
| RPM | ||
| Wheel Diameter | 0.5m | |
| Wheel Radius | 0.25m | |
| Circumference | 1.57m | |
| Max Speed (120km/hr) | 2000 m/minute | |
| Wheel RPM | 1273.8 rpm | |
| Drive Gear | ||
Rolling Friction
Fr=C x Mass x Acceleration due to gravity
Vehicle weight
Rider weight max
Total Weight
Rolling resistance coefficient for asphalt road
Rolling Friction
Drag Force
Fd=Cd x 1/2 x P x (v x v) Area
Drag coefficient for bike
Density of Air
max velocity
Area frontal
Drag Force
Power
P=(Total force) x Velocity/Efficiency
Total force
Efficiency
Velocity
Power
RPM
Wheel Diameter
Wheel Radius
Circumference
Max Speed (120km/hr)
Wheel RPM
Drive Gear
| Power | ||
| P=(Total force) x Velocity/Efficiency | ||
| Total force | 9.81+35.2= 45 Newton | |
| Efficiency | 0.85 | |
| Velocity | 33.33m/s | |
| Power | 1764.9 watts | Approx= 2000 Watts |
| RPM | ||
| Wheel Diameter | 0.5m | |
| Wheel Radius | 0.25m | |
| Circumference | 1.57m | |
| Max Speed (120km/hr) | 2000 m/minute | |
| Wheel RPM | 1273.8 rpm | |
| Drive Gear | ||
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