DC Motor Electro Magnetic Field Flux (EMF) Formula & Calculator



DC Motor EMF Calculation

Kf - Magnetic field constant
If - Field Current (amps)
Print

DC motor magnetic field flux (EMF) calculator - step by step calculation, formula & solved example problem to determine the strength of the electro-magnetic field flux generated by an electrical DC motor. Field winding constant Kf & field current If are the key elements in this calculation.

Formula

The below mathematical formula is used in this calculator to find the EMF generated by an electrical DC motor
formula to calculate DC motor (EMF) magnetic field flux φ

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 EMF generated by the DC motor.
Example Problem
Find the electro magnetic field strength (φ) of a DC motor whose field constant Kf = 125 & field current If = 0.50 Amps
Solution
The given data
Kf = 125
If = 0.50 amps

Step by step calculation
Formula to find φ = Kf x If
substitute the values in the formula
= 125 x 0.50
φ = 62.5 weber

In the field of electrical engineering, there may be many situations user may need to calculate the strength of the magnetic flux generated by the magnetic field 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 EMF, however, when it comes to online for quick calculations, this magnetic field flux calculator helps the user to perform & verify such calculations as quick as possible.