Parallel Wire Inductance Calculator | EM Tool

This tool calculates the inductance between two parallel wires based on their spacing and length. It is commonly used in electromagnetic analysis, transmission line design and PCB layout to assess the inductive properties of parallel conductors.

What is Parallel Wire Inductance?

Parallel wire inductance refers to the inductive coupling that occurs between two conductors placed parallel to each other. The inductance depends on factors such as the distance between the wires and their length. Understanding this inductance is important for minimizing interference and ensuring signal integrity in high-frequency circuits.

Parallel Wire Inductance Calculator

EXAMPLE:

• INPUTS:

  • Length of wires (l) = 1 meter
  • Distance between wire centers (d) = 0.02 meters
  • Radius of each wire (r) = 0.001 meters

• OUTPUT:

  • Inductance (L) = 0.00000119 H
  • Inductance (L) = 1.19 µH ~ 1.2 µH

Assumption : Relative permeability (μr) = 1 (for non-magnetic materials like copper)

Parallel Wire Inductance Formula

The following equation or formula is used for the Parallel Wire Inductance calculator:

Where:

• L = Inductance (H)
• mu0 = Permeability of free space (4π × 10^-7 H/m)
• l = Length of the wires (m)
• d = Distance between wire centers (m)
• r = Radius of each wire (m)
• Relative permeability (μr) = 1 (Assumed, for non magnetic materials like copper)

Key benefits

• Accurate Inductance Calculation: Provides precise inductance values for parallel conductors.
• EM Analysis: Useful for electromagnetic compatibility and interference assessments.
• Design Optimization: Aids in optimizing transmission line and PCB designs for better performance.

Summary

This Parallel Wire Inductance Calculator is an essential tool for engineers and designers working with high frequency circuits. It simplifies the process of determining inductance between parallel conductors, helping to ensure signal integrity and minimize electromagnetic interference in various applications.

References

• Rosa, E. B., “The Self and Mutual Inductances of Linear Conductors”, Bulletin of the Bureau of Standards, 1908
• “Electromagnetic Compatibility Engineering” by Henry W. Ott
• “High-Frequency PCB Design for EMC Compliance” by Mark I. Montrose
• “Inductance Calculations: Working Formulas and Tables” by Frederick W. Grover