Armature Voltage Calculator for DC Motor

The armature voltage of an electrical motor can be found using the armature voltage (DC motor) calculator, which provides a step-by-step calculation, formula, and solved example problem.

The primary variables used in this computation are the armature constant K_a, the armature speed n in rpm, and the flux produced by the magnetic field φ in weber.

Formula

To determine the armature voltage of an electrical DC motor, utilize the following mathematical formula in this calculator:

Armature Voltage Formula for DC Motor

V_a = K_a n φ

Where

V_a – Armature Voltage

K_a – Armature Design Constant

n – Armature Speed (RPM)

φ – Magnetic Field Flux Generated

Solved Example

Users may find it useful to understand how input values are used in these types of computations to get the armature voltage by looking at the example problem below, which has been solved step by step.

Example:

Determine the DC motor’s armature voltage (Va) for the 

Armature speed (n = 1500 rpm),

Armature constant (Ka = 0.0025), and

Flux produced by the magnetic field (φ = 100) Weber

Solution:

Given the information

n = 1500 rpm,

φ = 100 weber, and

Ka = 0.0025 armature speed

Calculation:

V_a = K_a x n x φ

V_a = 0.0025 x 1500 x 100

V_a = 375 V (Volts)

Armature voltage and rotor speed are directly proportional. Since the armature voltage regulates speed, it is essential to consider while constructing a DC motor to attain a particular speed.

When it comes to online calculator, this armature voltage calculator allows the user to perform & verify such calculations as quickly as possible. 

The above formula, step-by-step calculation, and solved example problem may be helpful for individuals to understand how the values are being utilized in the formula to find the DC motor armature voltage.

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