DC Motor Armature Torque Calculator

DC motor armature mechanical torque (T_m) calculator - step by step calculation, formula & solved example problem to find the armature mechanical torque produced by an electrical DC motor. Field constant K_a, armature current I_a & (EMF) flux generated by the magnetic field φ are the key elements in this calculation.

Formula for Armature Torque

The below mathematical formula is used in this calculator to find the armature mechanical torque (T_m) of an electrical DC motor

Solved Example

The below step by step solved example problem may helpful for users to understand how the input values are being used in such calculations to find the armature mechanical torque (T_m) of DC motor.
Example Problem
Find the armature mechanical torque (T_m) of a DC motor whose field constant K_a = 0.0025, armature current I_a = 0.75 amps & (EMF) flux generated by the magnetic field φ = 250 weber.
Solution
The given data
field constant K_a = 0.0025
EMF φ = 250 weber
I_a = 0.75 Amps

Step by step calculation
Formula to find T_m = (60 x K_a x I_a x φ)/2π
substitute the values in the above formula
= (60 x 0.0025 x 0.75 x 250)/2π
T_m = 4.476 newton-meters

In the field of electrical engineering, while changing the armature current, field constant & EMF, it's required to calculate the armature mechanical torque of a DC motor. The above formula, step by step calculation & solved example problem may be useful for users to understand how the values are being used in the formula to find the armature mechanical torque (T_m), however, when it comes to online for quick calculations, this calculator helps the user to perform & verify such calculations as quick as possible.