1. What is Flat Wire Inductance?

Definition: This calculator estimates the inductance of a flat wire or ribbon conductor based on its physical dimensions.

Purpose: It helps electrical engineers and designers determine the inductance of flat conductors used in PCB traces, busbars, and other applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Inductance (henrys)
• \( \mu_0 \) — Permeability of free space (4π×10⁻⁷ H/m)
• \( l \) — Length of the wire (meters)
• \( w \) — Width of the flat wire (meters)
• \( t \) — Thickness of the flat wire (meters)

Explanation: The formula approximates the inductance of a flat conductor by considering its geometric dimensions.

3. Importance of Flat Wire Inductance Calculation

Details: Knowing the inductance of flat conductors is crucial for high-frequency circuit design, power distribution systems, and minimizing parasitic effects.

4. Using the Calculator

Tips: Enter the conductor length, width, and thickness in meters. All values must be > 0. For best results, use consistent units.

5. Frequently Asked Questions (FAQ)

Q1: What is the permeability of free space (μ₀)?
A: It's a physical constant equal to 4π×10⁻⁷ H/m that represents how much resistance the vacuum of space offers to forming a magnetic field.

Q2: How accurate is this approximation?
A: This formula provides a good approximation for flat conductors where width ≫ thickness. For precise calculations, consider more complex models.

Q3: What if my conductor has a different shape?
A: Different formulas exist for round wires, coaxial cables, and other geometries. Use the appropriate calculator for those shapes.

Q4: How does frequency affect the result?
A: This calculates DC inductance. At high frequencies, skin effect and proximity effect will alter the effective inductance.

Q5: Can I use this for PCB trace inductance?
A: Yes, this works well for estimating PCB trace inductance, especially for wider traces.