08. MOTOR SEIZING AND ADAPTER SEIZING  QDiv20222023Odd/Repo9 GitHub Wiki
Motor sizing for Threshing Machine.
DC Motor

Mass of the body to hold(m)= 0.372kg

Diameter = 2.7

Acceleration due to gravity(g) = 9.81

Coefficient of friction (COF) = 0.3

F = m*g

F = 0.372*9.81

F = 3.658N
Now considering friction
 f=(COF)mg
 f=0.3*3.658
 f=1.09N
Now torque : f*(D/2)
 T=1.09*2.7
 T=2.96kgcm
Now considering Factor of safety i.e., FOS=1.5
 Final Torque = T*FOS
 Final Torque=2.96*1.5
 Final Torque=4.5 The torque gets divided among 4 pully system so the Final Torque is divided by 3 Hence,
 Final Torque = 4.5/3
 Final Torque = 1.15 By comparing with the table of specification for 1.15 Kgcm==1.2 Rated Torque ,we need DC Motor of [email protected]
Adapter SEIZING

There are total 4 dc motors

DC motor12kgcm torque > Motor is of 300RPM

Load current of the DC motor = V/R

Voltage used for DC motor=12V

Maximum Load current of DC motor is 300mA

No Load current of DC motor is 60mA

As we are using total of 4 DC motors

So total Load current is 4*300=1200mA

AS factor of safety is = 1.2

Total load current is 1200*1.2=1440mA at 12V