4. e. Motor Sizing and Battery Sizing - N-Division-2019-2020-Even/Repo-06 GitHub Wiki

Motor Sizing:

In our system, we are using an actuator(DC Motor) for the purpose of rotating the base of the LED which is placed in between the mirrors. This gives a nice touch to the ambience.

To select the motor, our first requirement was a low RPM motor with high torque. Therefore we arrived at the conclusion of using a 3RPM DC Motor that runs on 12Volts.

Battery Sizing:

The power source for our project comes from batteries. Our project is constrained to run for a minimum of 3 hours.

So, the current drawn by the actuator is:

• Load Current(I) of DC Motor = 0.3 A

Since the time(t) = 3hours, the total capacity of the battery required is:

Capacity = Ixt

Capacity = 0.3*3 = 0.9 Ah

Therefore, the battery required to run our system for a minimum of 3 hours is a battery with a capacity of 900 mAh.