1. What is Mutual Inductance?

Mutual Inductance is defined as when two or more coils are magnetically linked together by a common magnetic flux. It represents the ability of one coil to induce an electromotive force in another coil when the current in the first coil changes.

2. How Does the Calculator Work?

The calculator uses the Mutual Inductance formula:

Where:

• \( [Permeability-vacuum] \) — Permeability of vacuum (1.2566 × 10⁻⁶ H/m)
• \( \mu_r \) — Relative Permeability (H/m)
• \( A \) — Area of Coil (m²)
• \( Z \) — Number of Conductors
• \( N_2 \) — Secondary Turns of Coil
• \( L_{mean} \) — Mean Length (m)

Explanation: The formula calculates the mutual inductance between two coils based on their physical characteristics and magnetic properties.

3. Importance of Mutual Inductance Calculation

Details: Accurate mutual inductance calculation is crucial for designing transformers, inductors, and other electromagnetic devices where energy transfer between coils is essential.

4. Using the Calculator

Tips: Enter relative permeability in H/m, area in m², number of conductors, secondary turns, and mean length in meters. All values must be positive and non-zero.

5. Frequently Asked Questions (FAQ)

Q1: What is permeability of vacuum?
A: Permeability of vacuum is a physical constant equal to 4π × 10⁻⁷ H/m, approximately 1.2566 × 10⁻⁶ H/m.

Q2: How does relative permeability affect mutual inductance?
A: Higher relative permeability increases mutual inductance as it enhances the magnetic coupling between coils.

Q3: What is the significance of mean length?
A: Mean length represents the effective length of the magnetic path and inversely affects mutual inductance.

Q4: Can this calculator be used for air-core transformers?
A: Yes, for air-core transformers, use relative permeability of 1 (for air).

Q5: What are typical mutual inductance values?
A: Mutual inductance values range from microhenries (μH) to millihenries (mH) depending on the coil design and core material.