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Reluctance Formula

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The reluctance of a magnetic material is its ability to oppose the flow of magnetic flux. The magnetic flux created by the field windings follows the path of least magnetic reluctance. Check FAQs

S = \frac{L mean}{μ \cdot A}

S - Reluctance?L_mean - Mean Length?μ - Magnetic Permeability of a Medium?A - Area of Coil?

Reluctance Example

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Here is how the Reluctance equation looks like with Values.

Here is how the Reluctance equation looks like with Units.

Here is how the Reluctance equation looks like.

0.6171 = \frac{21.6}{0.14 \cdot 0.25}

0.6171AT/Wb = \frac{21.6mm}{0.14H/m \cdot 0.25m²}

0.6171 = \frac{21.6}{0.14 \cdot 0.25}

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Reluctance Solution

Follow our step by step solution on how to calculate Reluctance?

FIRST Step Consider the formula

S = \frac{L mean}{μ \cdot A}

Next Step Substitute values of Variables

∴

S = \frac{21.6mm}{0.14H/m \cdot 0.25m²}

Next Step Convert Units

∴

S = \frac{0.0216m}{0.14H/m \cdot 0.25m²}

Next Step Prepare to Evaluate

∴

S = \frac{0.0216}{0.14 \cdot 0.25}

Next Step Evaluate

∴

S = 0.617142857142857AT/Wb

LAST Step Rounding Answer

∴

S = 0.6171AT/Wb

Reluctance Formula Elements

Variables

Reluctance

The reluctance of a magnetic material is its ability to oppose the flow of magnetic flux. The magnetic flux created by the field windings follows the path of least magnetic reluctance.

Symbol: S

Measurement: ReluctanceUnit: AT/Wb

Note: Value should be greater than 0.

Formulas to find Reluctance

Mean Length

The Mean length the effective length of a closed magnetic loop inside a magnetic core made of ferromagnetic material which may be also gapped.

Symbol: L_mean

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Mean Length

Magnetic Permeability of a Medium

Magnetic Permeability of a medium is the measure of magnetization that a material obtains in response to an applied magnetic field.

Symbol: μ

Measurement: Magnetic PermeabilityUnit: H/m

Note: Value should be greater than 0.

Formulas to find Magnetic Permeability of a Medium

Area of Coil

The area of coil is the region bounded by the shape of an object. The space covered by the figure or any two-dimensional geometric shape, in a plane, is the area of the shape.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Area of Coil

Other formulas in Magnetic Specifications category

Go Intensity of Magnetization

I mag = \frac{m}{V}

Go Magnetic Flux Density

B = \frac{Φ m}{A}

Go Magnetic Flux Density using Magnetic Field Intensity

B = μ \cdot I

Go Magnetic Flux in Core

Φ m = \frac{mmf}{S}

How to Evaluate Reluctance?

Reluctance evaluator uses Reluctance = Mean Length/(Magnetic Permeability of a Medium*Area of Coil) to evaluate the Reluctance, Reluctance (also known as reluctance, magnetic resistance, or a magnetic insulator) is defined as the opposition offered by a magnetic circuit to the production of magnetic flux. It is the property of the material that opposes the creation of magnetic flux in a magnetic circuit. Reluctance is denoted by S symbol.

How to evaluate Reluctance using this online evaluator? To use this online evaluator for Reluctance, enter Mean Length (L_mean), Magnetic Permeability of a Medium (μ) & Area of Coil (A) and hit the calculate button.

FAQs on Reluctance

What is the formula to find Reluctance?

The formula of Reluctance is expressed as Reluctance = Mean Length/(Magnetic Permeability of a Medium*Area of Coil). Here is an example- 0.617143 = 0.0216/(0.14*0.25).

How to calculate Reluctance?

With Mean Length (L_mean), Magnetic Permeability of a Medium (μ) & Area of Coil (A) we can find Reluctance using the formula - Reluctance = Mean Length/(Magnetic Permeability of a Medium*Area of Coil).

Can the Reluctance be negative?

No, the Reluctance, measured in Reluctance cannot be negative.

Which unit is used to measure Reluctance?

Reluctance is usually measured using the Ampere-Turn per Weber[AT/Wb] for Reluctance. are the few other units in which Reluctance can be measured.

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Reluctance Formula

Reluctance Example

Reluctance Solution

Reluctance Formula Elements

Other formulas in Magnetic Specifications category

How to Evaluate Reluctance?

FAQs on Reluctance

Variable Name