DC Motor Armature Voltage Formula & Calculator
 

DC motor armature voltage calculator  step by step calculation, formula & solved example problem to determine the armature voltage of an electrical motor. Armature constant K_{a}, armature speed n in rpm & flux generated by the magnetic field φ in weber are the key elements in this calculation.
Formula
The below mathematical formula is used in this calculator to find the armature voltage 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 voltage.
Example Problem
Find the armature voltage (V_{a}) of DC motor whose armature constant K_{a} = 0.0025, armature speed n = 1500 rpm & flux generated by the magnetic field φ = 100 weber
Solution
The given data
K_{a} = 0.0025
armature speed n = 1500 rpm
φ = 100 weber
Step by step calculation
Formula to find V_{a} = K_{a} x n x φ
substitute the values in the formula
= 0.0025 x 1500 x 100
V_{a} = 375 volts
In the field of electrical engineering, the speed of rotor is directly proportional to armature voltage. While designing DC motor to attain a certain speed, it's essential to calculate the the armature voltage as it controls the speed. 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 DC motor armature voltage, however, when it comes to online for quick calculations, this armature voltage calculator helps the user to perform & verify such calculations as quick as possible.