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DC Motor Frequency given Speed Formula

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Frequency is the number of occurrences of a repeating event per unit of time for an electrical signal. Check FAQs

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

f - Frequency?n - Number of Poles?N - Motor Speed?

DC Motor Frequency given Speed Example

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Here is how the DC Motor Frequency given Speed equation looks like with Values.

Here is how the DC Motor Frequency given Speed equation looks like with Units.

Here is how the DC Motor Frequency given Speed equation looks like.

4.5029 = \frac{4 \cdot 1290}{120}

4.5029Hz = \frac{4 \cdot 1290rev/min}{120}

4.5029 = \frac{4 \cdot 1290}{120}

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DC Motor Frequency given Speed Solution

Follow our step by step solution on how to calculate DC Motor Frequency given Speed?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

f = \frac{4 \cdot 1290rev/min}{120}

Next Step Convert Units

∴

f = \frac{4 \cdot 135.0885rad/s}{120}

Next Step Prepare to Evaluate

∴

f = \frac{4 \cdot 135.0885}{120}

Next Step Evaluate

∴

f = 4.50294946991607Hz

LAST Step Rounding Answer

∴

f = 4.5029Hz

DC Motor Frequency given Speed Formula Elements

Variables

Frequency

Frequency is the number of occurrences of a repeating event per unit of time for an electrical signal.

Symbol: f

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Frequency

Number of Poles

Number of Poles is 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

Motor Speed

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

Symbol: N

Measurement: Angular VelocityUnit: rev/min

Note: Value can be positive or negative.

Formulas to find Motor Speed

Other formulas in DC Motor Characteristics category

Go Machine Construction Constant of DC Motor

K f = \frac{V s - I a \cdot R a}{Φ \cdot N}

Go Back EMF Equation of DC Motor

E b = \frac{n \cdot Φ \cdot Z \cdot N}{60 \cdot n ||}

Go Supply Voltage given Electrical Efficiency of DC Motor

V s = \frac{ω s \cdot τ a}{I a \cdot η e}

Go Armature Current given Electrical Efficiency of DC Motor

I a = \frac{ω s \cdot τ a}{V s \cdot η e}

How to Evaluate DC Motor Frequency given Speed?

DC Motor Frequency given Speed evaluator uses Frequency = (Number of Poles*Motor Speed)/120 to evaluate the Frequency, DC Motor Frequency given Speed is the frequency of armature voltages, which are ac, which are then converted into dc through brushes. Frequency is denoted by f symbol.

How to evaluate DC Motor Frequency given Speed using this online evaluator? To use this online evaluator for DC Motor Frequency given Speed, enter Number of Poles (n) & Motor Speed (N) and hit the calculate button.

FAQs on DC Motor Frequency given Speed

What is the formula to find DC Motor Frequency given Speed?

The formula of DC Motor Frequency given Speed is expressed as Frequency = (Number of Poles*Motor Speed)/120. Here is an example- 4.502949 = (4*135.088484097482)/120.

How to calculate DC Motor Frequency given Speed?

With Number of Poles (n) & Motor Speed (N) we can find DC Motor Frequency given Speed using the formula - Frequency = (Number of Poles*Motor Speed)/120.

Can the DC Motor Frequency given Speed be negative?

No, the DC Motor Frequency given Speed, measured in Frequency cannot be negative.

Which unit is used to measure DC Motor Frequency given Speed?

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

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