MOTOR TORQUE

The following calculators compute the various torque aspects of motors. These equations are for estimation only, friction, windage, and other factors are not taken into consideration.

Calculator-1

Known variables: Horse Power and Speed in RPM

Torque is the action of a force producing or tending to produce rotation. Torque = force x distance



           
 Torque   
Input Horse Power, hp :  
Input Speed, N (RPM) :  
Torque, T (lbs-ft) :  
 

Calculator-2

Known variables: Weight (lbs), Diameter (ft), Change in Speed (RPM), and Time to accelerate Total System (sec)

In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load.



Accelerating Torque for Solid Cylinders  
Input Weight, w (lbs) :  
Input Diameter,d (ft):  
Input Change in Speed Required, dN (RPM) :  
Input Time to Accelerate Total System, t (Sec) :  
Accelerating Torque, T (lbs-ft) :  
     

Calculator-3

Known variables: Weight (lbs), Outer Diameter (ft), Inner Diameter (ft), Change in Speed (RPM), and Time to accelerate Total System (sec)

In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load.



Accelerating Torque for Hollow Cylinders    
Input Weight, w (lbs) :  
Input Outer Diameter, od (ft):  
Input Inner Diameter, id (ft):  
Input Change in Speed Required, dN (RPM) :  
Input Time to Accelerate Total System, t (Sec) :  
Accelerating Torque, T (lbs-ft) :  
 

Calculator-4

Known variables: Speed of Moving Parts (RPM), Speed of Driving Motor (RPM), Change in Speed (RPM), Time to Accelerate System (sec)

In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load.



Accelerating Torque for Motor Shafts  
Input Speed of Moving Part, N (RPM) :  
Input Speed of Driving Motor, NM (RPM) :  
Input Change in Speed Required, dN (RPM) :  
Input Time to Accelerate Total System, t (Sec) :  
Accelerating Torque, T (lbs-ft) :  
   

Calculator-5

Known variables: Weight (lbs), Linear Velocity (ft/min), Speed of Driving Motor (RPM), Change in Speed (RPM), and Time to Accelerate Total System (sec)

In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load.



Accelerating Torque for Linear Motion    
Input Weight, w (lbs) :    
Input Linear Velocity, v :
   
Input Speed of Driving Motor, NM (RPM):    
Input Change in Speed Required, dN (RPM) :    
Input Time to Accelerate Total System, t (Sec) :    
Accelerating Torque, T (lbs-ft) :