9. Motor Sizing And Battery Sizing - M-Division-2020-2021-Even/Repo_05 GitHub Wiki

1.MOTOR SIZING

  • Diameter of the spool : 14cm= 0.14m

  • Co-efficient of friction between motor and spool : 0.4

  • Mass of the spool :430.92 gm

  • Density of the material : 1 gm/cm^3

  • Volume of the spool : 430.92 cm^3

  • Mass in kg : 0.43 kg

  • g=9.8m/s^2

  • Force = Mass * COF* g

  •       0.43*0.4*9.8

  •       1.6856 N.

  • Torque = (F*D)/2

  •         (1.6856*0.14)/2

  •         0.1179 Nm.

  • Torque(Kg-cm) = 0.1179 *100/9.8

  •               1.204 Kg-cm.

  • Factor of Safety = 1.2

  • Total torque = 1.204 *1.2

  •            1.448 Kg-cm.

As per DC Geared Motor Specification 12 V , 60 rpm DC motor is chosen .

BATTERY SIZING

SR.NO Components Quantity Voltage Current
01 DC Motor 2 12 V 350 mA*2= 700 mA
02 Arduino Uno 1 5V 40 mA
03 LCD display 1 5V 200 mA

POWER SUPPLY

1. For 12 V 0.7 A

 Factor of Safety = 1.2
 1.2 *0.7 =0.84 A

For 12 V 0.84 A We require an ADAPTOR of specification 12 V , 1 A.

2. For 5V 0.24A

   Factor Of Safety = 1.2
   1.2 *0.24 = 0.288A

For 5V, 0.288A We require an ADAPTOR of specification 5V , 1A.