What Is the Inductor Energy Storage & Magnetic Field Calculator?
Inductor energy storage quantifies the potential energy accumulated in the magnetic field created by current flow.
How Does the Inductor Energy Storage & Magnetic Field Calculator Work?
Work is done against back-EMF during current ramp-up, integrating V·I over time to arrive at 0.5·L·I².
Inductor Energy Storage & Magnetic Field Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
E = \frac{1}{2} L \cdot I^2, \quad \lambda = L \cdot I, \quad B = \frac{\lambda}{N \cdot A}
Stored magnetic energy E is half inductance L times current I squared. Flux linkage is L times I.
How to Use the Inductor Energy Storage & Magnetic Field Calculator
- Enter inductance in milliHenries (mH).
- Specify operating current in Amperes.
- Optionally supply winding turns and core area to evaluate core flux density.
Step-by-Step Example Calculation
47 mH Filter Choke at 2.5 Amps
Input Values:
inductanceMilliHenries:47
currentAmps:2.5
turnsN:150
coreAreaMm2:200
Worked Steps: Stores 0.1469 Joules (146.9 mJ) with 0.1175 Wb flux linkage and 0.5875 T core flux density safely below 1.5 T saturation.
Understanding Your Result
Stored Energy (Joules / mJ): Total magnetic energy available.
Flux Linkage (mWb): Total magnetic flux integrated through turns.
Flux Density (Tesla): Peak field intensity within the core.
Factors That Affect the Result
- Energy scales quadratically with current and linearly with inductance.
When Should You Use This Calculator?
- Switching power supply flyback / buck sizing, pulsed laser discharge circuits, and solenoid actuator design.
Assumptions & Limitations
- Assumes linear permeability operating below the magnetic saturation threshold.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Exact magnetostatic field energy formulation.