Rotor Frequency in Induction Motor Calculator

✖Number of Polesis defined as the number of poles in an electrical machine for the flux generation.ⓘ Number of Poles [n]			+10% -10%
✖Synchronous speed is a definite speed for an alternating-current machine that is dependent on the frequency of the supply circuit.ⓘ Synchronous Speed [N_s]			+10% -10%
✖Motor Speed is the speed of the rotor(motor).ⓘ Motor Speed [N_m]			+10% -10%

✖Rotor frequency is the number of cycles per second of the rotor.ⓘ Rotor Frequency in Induction Motor [f_r]

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Formula

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Rotor Frequency in Induction Motor

Formula

`"f"_{"r"} = ("n"/120)*("N"_{"s"}-"N"_{"m"})`

Example

`"4.572763Hz"=("4"/120)*("15660rev/min"-"14350rev/min")`

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Rotor Frequency in Induction Motor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed)
f_r = (n/120)*(N_s-N_m)
This formula uses 4 Variables

Variables Used

Rotor Frequency - (Measured in Hertz) - Rotor frequency is the number of cycles per second of the rotor.
Number of Poles - Number of Polesis defined as the number of poles in an electrical machine for the flux generation.
Synchronous Speed - (Measured in Radian per Second) - Synchronous speed is a definite speed for an alternating-current machine that is dependent on the frequency of the supply circuit.
Motor Speed - (Measured in Radian per Second) - Motor Speed is the speed of the rotor(motor).

STEP 1: Convert Input(s) to Base Unit

Number of Poles: 4 --> No Conversion Required
Synchronous Speed: 15660 Revolution per Minute --> 1639.91136509036 Radian per Second (Check conversion here)
Motor Speed: 14350 Revolution per Minute --> 1502.72848589059 Radian per Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

f_r = (n/120)*(N_s-N_m) --> (4/120)*(1639.91136509036-1502.72848589059)

Evaluating ... ...

f_r = 4.57276263999233

STEP 3: Convert Result to Output's Unit

4.57276263999233 Hertz --> No Conversion Required

FINAL ANSWER

4.57276263999233 ≈ 4.572763 Hertz <-- Rotor Frequency

(Calculation completed in 00.004 seconds)

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Created by Parminder Singh

Chandigarh University (CU), Punjab

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GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

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< 3 Frequency Calculators

Rotor Frequency in Induction Motor

Go Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed)

Frequency given Number of Poles in Induction Motor

Go Frequency = (Number of Poles*Synchronous Speed)/120

Rotor Frequency given Supply Frequency

Go Rotor Frequency = Slip*Frequency

Rotor Frequency in Induction Motor Formula

Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed)
f_r = (n/120)*(N_s-N_m)

Explain the rotor circuit model?

the greater the relative motion between the rotor and the stator magnetic fields, the greater the resulting rotor voltage and rotorfrequency, The largest relative motion occurs when the rotor is stationary, called the locked-rotor or blocked-rotor condition, so the largest voltage and rotor frequency arc induced in the rotor at that condition,

How to Calculate Rotor Frequency in Induction Motor?

Rotor Frequency in Induction Motor calculator uses Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed) to calculate the Rotor Frequency, The Rotor Frequency in Induction Motor formula is defined as the frequency of the rotating part of an induction motor. Rotor Frequency is denoted by f_r symbol.

How to calculate Rotor Frequency in Induction Motor using this online calculator? To use this online calculator for Rotor Frequency in Induction Motor, enter Number of Poles (n), Synchronous Speed (N_s) & Motor Speed (N_m) and hit the calculate button. Here is how the Rotor Frequency in Induction Motor calculation can be explained with given input values -> 4.572763 = (4/120)*(1639.91136509036-1502.72848589059).

FAQ

What is Rotor Frequency in Induction Motor?

The Rotor Frequency in Induction Motor formula is defined as the frequency of the rotating part of an induction motor and is represented as f_r = (n/120)*(N_s-N_m) or Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed). Number of Polesis defined as the number of poles in an electrical machine for the flux generation, Synchronous speed is a definite speed for an alternating-current machine that is dependent on the frequency of the supply circuit & Motor Speed is the speed of the rotor(motor).

How to calculate Rotor Frequency in Induction Motor?

The Rotor Frequency in Induction Motor formula is defined as the frequency of the rotating part of an induction motor is calculated using Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed). To calculate Rotor Frequency in Induction Motor, you need Number of Poles (n), Synchronous Speed (N_s) & Motor Speed (N_m). With our tool, you need to enter the respective value for Number of Poles, Synchronous Speed & Motor Speed and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Rotor Frequency?

In this formula, Rotor Frequency uses Number of Poles, Synchronous Speed & Motor Speed. We can use 1 other way(s) to calculate the same, which is/are as follows -

Rotor Frequency = Slip*Frequency

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