Magnetic Reluctance
Calculate lumped magnetic reluctance ℛ=l/(μ₀μrA) for a uniform material segment. Use separate segments in series/parallel for mixed core and air-gap paths.
Description
Calculate lumped magnetic reluctance ℛ=l/(μ₀μrA) for a uniform material segment. Use separate segments in series/parallel for mixed core and air-gap paths.
Magnetic Reluctance: Calculate lumped magnetic reluctance ℛ=l/(μ₀μrA) for a uniform material segment. Use separate segments in series/parallel for mixed core and air-gap paths.
When to use Magnetic Reluctance
Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.
- Path length (m)
- Required number input.
- Relative permeability
- Required number input.
- Cross-section (m²)
- Required number input.
How Magnetic Reluctance works
Calculate lumped magnetic reluctance ℛ=l/(μ₀μrA) for a uniform material segment. Use separate segments in series/parallel for mixed core and air-gap paths. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Reluctance Per H
- The resulting reluctance per h returned as a number.
Limitations and assumptions
- Inductor calculations depend on core material, air gap, turns, frequency, waveform, temperature, DC bias, copper resistance, skin and proximity effects, fringing, and saturation definition. Small-signal inductance and nominal current rating may not describe switching operation.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.
References
-
Inductor — Wikipedia contributors
Similar or alternative tools
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- Inductor Q at Frequency
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