7.MOTOR SIZING AND BATTERY SIZING - K-Division-2020-21-Even/Repo-08 GitHub Wiki

Motor Sizing

Force= Weight * G

Torque = Force * Radius

Approximate weight of whole machine = 1500 Gram

Approximate weight on one DC motor = 375 Gram

Radius = 50 Mm

Force = 3.675 N

Torque = ‭0.18375‬ N-m = 1.8737285413468914 Kg-cm

Net torque= torque * Factor of safety(1.5)= ‭2.8105928120203371‬ kg-cm = 3 Kg-cm (Approx.)

Therefore we require a motor of 30rpm

Adapter calculation: Load current = 300 mA

Along with DC motor, other electronic components also require current. So we multiply by 1.2 300 mA * 1.2 = 360 mA

This is required current.

We require an adapter of 5A @ 12 volts.

Battery Sizing

Battery requirement: Current drawn * time =360mA * 6 =2160mAh

Battery is required @ 9-12 volts.