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Rotor Frequency in Induction Motor Formula

GoRotor Frequency given Supply Frequency Formula

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Rotor frequency is the number of cycles per second of the rotor. Check FAQs

f r = (\frac{n}{120}) \cdot (N s - N m)

f_r - Rotor Frequency?n - Number of Poles?N_s - Synchronous Speed?N_m - Motor Speed?

Rotor Frequency in Induction Motor Example

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Here is how the Rotor Frequency in Induction Motor equation looks like with Values.

Here is how the Rotor Frequency in Induction Motor equation looks like with Units.

Here is how the Rotor Frequency in Induction Motor equation looks like.

4.5728 = (\frac{4}{120}) \cdot (15660 - 14350)

4.5728Hz = (\frac{4}{120}) \cdot (15660rev/min - 14350rev/min)

4.5728 = (\frac{4}{120}) \cdot (15660 - 14350)

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Rotor Frequency in Induction Motor Solution

Follow our step by step solution on how to calculate Rotor Frequency in Induction Motor?

FIRST Step Consider the formula

f r = (\frac{n}{120}) \cdot (N s - N m)

Next Step Substitute values of Variables

∴

f r = (\frac{4}{120}) \cdot (15660rev/min - 14350rev/min)

Next Step Convert Units

∴

f r = (\frac{4}{120}) \cdot (1639.9114rad/s - 1502.7285rad/s)

Next Step Prepare to Evaluate

∴

f r = (\frac{4}{120}) \cdot (1639.9114 - 1502.7285)

Next Step Evaluate

∴

f r = 4.57276263999233Hz

LAST Step Rounding Answer

∴

f r = 4.5728Hz

Rotor Frequency in Induction Motor Formula Elements

Variables

Rotor Frequency

Rotor frequency is the number of cycles per second of the rotor.

Symbol: f_r

Measurement: FrequencyUnit: Hz

Note: Value can be positive or negative.

Formulas to find Rotor Frequency

Number of Poles

Number of Polesis defined as the number of poles in an electrical machine for the flux generation.

Symbol: n

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Number of Poles

Synchronous Speed

Synchronous speed is a definite speed for an alternating-current machine that is dependent on the frequency of the supply circuit.

Symbol: N_s

Measurement: Angular VelocityUnit: rev/min

Note: Value can be positive or negative.

Formulas to find Synchronous Speed

Motor Speed

Motor Speed is the speed of the rotor(motor).

Symbol: N_m

Measurement: Angular VelocityUnit: rev/min

Note: Value can be positive or negative.

Formulas to find Motor Speed

Other Formulas to find Rotor Frequency

Go Rotor Frequency given Supply Frequency

f r = s \cdot f

Other formulas in Frequency category

Go Frequency given Number of Poles in Induction Motor

f = \frac{n \cdot N s}{120}

How to Evaluate Rotor Frequency in Induction Motor?

Rotor Frequency in Induction Motor evaluator uses Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed) to evaluate 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 evaluate Rotor Frequency in Induction Motor using this online evaluator? To use this online evaluator for Rotor Frequency in Induction Motor, enter Number of Poles (n), Synchronous Speed (N_s) & Motor Speed (N_m) and hit the calculate button.

FAQs on Rotor Frequency in Induction Motor

What is the formula to find Rotor Frequency in Induction Motor?

The formula of Rotor Frequency in Induction Motor is expressed as Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed). Here is an example- 4.572763 = (4/120)*(1639.91136509036-1502.72848589059).

How to calculate Rotor Frequency in Induction Motor?

With Number of Poles (n), Synchronous Speed (N_s) & Motor Speed (N_m) we can find Rotor Frequency in Induction Motor using the formula - Rotor Frequency = (Number of Poles/120)*(Synchronous Speed-Motor Speed).

What are the other ways to Calculate Rotor Frequency?

Here are the different ways to Calculate Rotor Frequency-

Rotor Frequency=Slip*Frequency

Can the Rotor Frequency in Induction Motor be negative?

Yes, the Rotor Frequency in Induction Motor, measured in Frequency can be negative.

Which unit is used to measure Rotor Frequency in Induction Motor?

Rotor Frequency in Induction Motor is usually measured using the Hertz[Hz] for Frequency. Petahertz[Hz], Terahertz[Hz], Gigahertz[Hz] are the few other units in which Rotor Frequency in Induction Motor can be measured.

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Rotor Frequency in Induction Motor Formula

​GoRotor Frequency given Supply Frequency Formula

Rotor Frequency in Induction Motor Example

Rotor Frequency in Induction Motor Solution

Rotor Frequency in Induction Motor Formula Elements

Other Formulas to find Rotor Frequency

Other formulas in Frequency category

How to Evaluate Rotor Frequency in Induction Motor?

FAQs on Rotor Frequency in Induction Motor

Variable Name

GoRotor Frequency given Supply Frequency Formula