1. What is a Multilayer Coil Inductance Calculator?

Definition: This calculator estimates the inductance of a multilayer coil based on its physical dimensions and number of turns.

Purpose: It helps electronics engineers and hobbyists design coils with specific inductance values for circuits, transformers, and RF applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Inductance in microhenries (μH)
• \( N \) — Number of turns
• \( r \) — Average radius of the coil (cm)
• \( l \) — Length of the coil (cm)
• \( b \) — Winding thickness (cm)

Explanation: The formula accounts for the coil's geometry and winding density to estimate its inductance.

3. Importance of Coil Inductance Calculation

Details: Accurate inductance calculation is crucial for designing filters, oscillators, transformers, and other electronic components where precise inductance values are required.

4. Using the Calculator

Tips: Enter the number of turns, average radius, coil length, and winding thickness. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for measurements?
A: All length measurements should be in centimeters (cm) for this formula to work correctly.

Q2: How accurate is this formula?
A: This provides a good estimate for typical multilayer coils, but actual inductance may vary based on core material, winding technique, and frequency.

Q3: What is the average radius?
A: It's the average of the inner and outer radii of the coil winding.

Q4: Can I use this for air-core coils?
A: Yes, this formula is specifically for air-core multilayer coils.

Q5: How does winding thickness affect inductance?
A: Thicker windings (larger b) generally decrease inductance as they increase the denominator of the formula.