Magnetic Air Gap Length
Solve a simple magnetic-circuit inductance model for required air-gap length: lg=μ₀N²A/L−lc/μr. This treats fringing and leakage as negligible; a negative result means the requested inductance needs no positive gap under the model.
Description
Solve a simple magnetic-circuit inductance model for required air-gap length: lg=μ₀N²A/L−lc/μr. This treats fringing and leakage as negligible; a negative result means the requested inductance needs no positive gap under the model.
Magnetic Air Gap Length: Solve a simple magnetic-circuit inductance model for required air-gap length: lg=μ₀N²A/L−lc/μr. This treats fringing and leakage as negligible; a negative result means the requested inductance needs no positive gap under the model.
When to use Magnetic Air Gap Length
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.
- Turns
- Required integer input.
- Core cross-section (m²)
- Required number input.
- Target inductance (H)
- Required number input.
- Core path length (m)
- Required number input.
- Core relative permeability
- Required number input.
How Magnetic Air Gap Length works
Solve a simple magnetic-circuit inductance model for required air-gap length: lg=μ₀N²A/L−lc/μr. This treats fringing and leakage as negligible; a negative result means the requested inductance needs no positive gap under the model. 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
- Air Gap Length M
- The resulting air gap length m returned as a number.
Limitations and assumptions
- Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
- 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
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Electronics — Wikipedia contributors
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