1. What is Inductance?

Inductance is the property of an electrical conductor that opposes a change in current. It is measured in henries (H) and is a key parameter in inductor design and selection.

2. How Does the Calculator Work?

The calculator uses the inductance formula:

Where:

• \( L \) — Inductance in henries (H)
• \( N \) — Number of turns
• \( \mu \) — Core permeability (H/m)
• \( A \) — Cross-sectional area (m²)
• \( l \) — Magnetic path length (m)

Explanation: The equation shows that inductance increases with the square of the number of turns and the core's permeability, while decreasing with longer magnetic paths.

3. Importance of Inductance Calculation

Details: Accurate inductance calculation is crucial for designing circuits with inductors, especially in power supplies, filters, and RF applications.

4. Using the Calculator

Tips: Enter all values in the specified units. Number of turns must be an integer ≥1, other values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical inductance range?
A: Common inductors range from nanohenries (nH) to millihenries (mH), with power inductors sometimes reaching several henries.

Q2: How does core material affect inductance?
A: Higher permeability cores (like ferrite) yield higher inductance for the same number of turns compared to air cores.

Q3: What is the practical limit on number of turns?
A: While more turns increase inductance, they also increase resistance and physical size. Optimal designs balance these factors.

Q4: How accurate is this calculation?
A: This provides a theoretical value. Actual inductance may vary due to factors like core saturation, temperature, and winding geometry.

Q5: When should I use this calculator?
A: Use it for initial inductor design or to understand how changing parameters affects inductance in your circuit.