What all calcualtions to be done for selecting the Motor for my vehicle?

Selecting the right motor for your vehicle involves considering several factors. Here are some calculations and considerations you need to make:

1. Determine the total weight of the vehicle: Measure or estimate the total weight of your vehicle, including passengers, cargo, and any additional equipment. This weight is typically measured in pounds (lbs) or kilograms (kg).
2. Calculate the desired acceleration: Determine the desired acceleration performance of your vehicle. This can be subjective and depends on factors such as the vehicle’s purpose, desired speed, and terrain. Higher acceleration requires more torque from the motor.
3. Calculate the required tractive force: Tractive force is the force needed to move the vehicle forward. It is calculated using Newton’s second law of motion: Force = mass × acceleration. Convert the total weight of the vehicle to mass (kg or slugs) and multiply it by the desired acceleration to obtain the required tractive force. Tractive force = Vehicle mass × Desired acceleration
4. Consider the rolling resistance: Rolling resistance is the force that opposes the motion of the vehicle’s tires on the road surface. It depends on factors such as tire type, tire pressure, and road conditions. Rolling resistance can be estimated using empirical formulas or obtained from tire manufacturers. Add the rolling resistance force to the required tractive force. Total force = Tractive force + Rolling resistance force
5. Determine the wheel radius: Measure or estimate the radius of the vehicle’s wheels in meters (m) or feet (ft).
6. Calculate the required torque: Torque is the rotational force produced by the motor. To calculate the required torque, multiply the total force by the wheel radius. Required torque = Total force × Wheel radius
7. Consider the motor efficiency: Motors have an efficiency rating that indicates how effectively they convert electrical energy into mechanical power. Take into account the motor efficiency when selecting a motor. The efficiency is usually expressed as a percentage. Usable torque = Required torque / Motor efficiency
8. Determine the desired top speed: Consider the desired top speed of your vehicle. This will help you select a motor with an appropriate power output to achieve the desired speed.
9. Consider other factors: Apart from the calculations mentioned above, you should also consider factors such as available space for the motor, voltage requirements, cooling requirements, controller compatibility, and cost.

It’s important to note that these calculations provide a starting point for selecting a motor, but other factors such as motor type (DC, AC, brushless), motor characteristics (speed-torque curve), and specific application requirements should also be taken into account. Consulting with a motor specialist or engineer familiar with electric vehicle systems can provide valuable guidance in selecting the most suitable motor for your vehicle.