7.MOTOR SIZING AND BATTERY SIZING: - P-Odd-2022/Repo-12 GitHub Wiki
MOTOR SIZING:
The motors used in our model are:
- 1 DC MOTOR
- 1 SERVO MOTOR
- 2 STEPPER MOTOR
FORMULAE:
- T=Mg/d
- Battery sizing= torque(T) * Factor of safety(FOS)
For dispensing dettol:
- m=30 grams
- T=m*r
- 0.03*4=0.12kg-cm
- FOS=1.5
- Total torque=1.5*0.12=0.18 kg-cm
- DC motor size should be around 10 rpm.
- For our convenience we use DC motor of 10 rpm as r is neglected.
For dispensing cotton and band-aids:
- m=20 grams
- T=m*r
- T=0.02*4=0.08kg-cm
- FOS=1.5
- Total torque=1.5*0.08=0.12kg-cm
- Motor size should be around 60 rpm and here stepper motor is used.
For dispensing tablets:
- MOTOR: Here SERVO MOTOR with higher torque is used.
BATTERY SIZING:
-
For battery sizing, FOS=1.2
-
We are using one 12V 2A adaptors and one 5v adapter for our model and one 3.7V battery and 1 DC motor,1 servo motor,2 stepper motor.