8. MOTOR SIZING AND BATTERY SIZING: - J-division-2020-2021-even/Repo-17 GitHub Wiki
A. MOTOR SIZING:
DC MOTOR:
Diameter of the conveyor rod(D):3.0 CM=0.03m
Coefficient of friction between rubber sheet and PVC pipe=COF= 0.7
Mass of 1Rs coin: 3.76 grams
Mass of 2Rs coin: 5.62 grams
Mass of 5Rs coin: 6.00 grams
The TOTAL mass of the coins= 15.380 grams=0.01538kg
The TOTAL mass of the conveyor belt= 0.80kg
TOTAL mass = 0.01538+0.80=0.815380 kg
g= 9.8 m/s^2
FORCE(F) = TOTAL mass X COF x g = 0.815380 X0.7 X9.8 = 5.59 N
TORQUE =(FxD)/2 = (5.59x0.025)/2 = 0.069875 Nm
TORQUE= 0.069875 x100 /9.81 =0.712
FOS = 1.5
FINAL TORQUE = 0.712x 1.5 = 1.0680 Kg cm
Considering the final torque, we are using the 12v,30 RPM DC MOTOR, WHICH IS A TORQUE OF 1.0680 kgcm.
B. BATTERY SIZING
| SL NO | COMPONENT | QUANTITY | VOLTAGE | CURRENT | TOTAL CURRENT |
|---|---|---|---|---|---|
| 1 | DC MOTOR,30 rpm | 2 | 12v | 300mA | 300mA |
| 2 | FORCE SENSOR | 3 | 5V | 0.5mA | 1.5mA |
| 3 | LED | 1 | 3V | 20mA | 20mA |
| 4 | BUZZER | 1 | 5v | 10mA | 10mA |
| 5 | ARDUINO UNO | 1 | 3V-5V | 40mA | 100mA |
REQUIRED VOLTAGE AND CURRENT SUPPLIES
- 12V 300mA supply considering the factor of safety as 1.2 Final power requirement= 12V 360 mA
Therefore we will use a 12v 2A adapter along with a power source of 5V TO 12V .