1. What is a Ferrite Core Inductor Calculator?

Definition: This calculator determines the inductance of a ferrite core inductor based on the AL value and number of wire turns.

Purpose: It helps electronics engineers and hobbyists design inductors for circuits like power supplies, filters, and RF applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Inductance (henrys)
• \( A_L \) — Inductance factor (henrys per turn squared)
• \( N \) — Number of turns of wire

Explanation: The AL value (specific to each ferrite core) is multiplied by the square of the number of turns to determine the total inductance.

3. Importance of Inductor Calculation

Details: Accurate inductance calculation ensures proper circuit operation, especially in switching power supplies and frequency-dependent circuits.

4. Using the Calculator

Tips: Enter the AL value (found in core datasheets) and the desired number of turns. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find the AL value?
A: The AL value is specified in the datasheet of your ferrite core, typically in nH/turn² or μH/turn².

Q2: Does this work for air-core inductors?
A: No, this formula is specific to ferrite cores. Air-core inductors use different calculations.

Q3: What's a typical AL value range?
A: Common values range from 10 nH/turn² to several μH/turn², depending on core material and size.

Q4: How accurate is this calculation?
A: It provides theoretical value. Actual inductance may vary slightly due to winding technique and core tolerances.

Q5: Can I calculate turns needed for a specific inductance?
A: Yes, rearrange the formula: \( N = \sqrt{L / A_L} \)