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PyOpenMagnetics Examples

This directory contains practical examples demonstrating PyOpenMagnetics workflows.

Available Examples

File Description
flyback_design.py Complete flyback transformer design workflow
buck_inductor.py Buck converter output inductor design

Running Examples

# Install PyOpenMagnetics first
pip install PyOpenMagnetics

# Run an example
python examples/flyback_design.py

Example Topics Covered

flyback_design.py

  • Defining multi-output flyback requirements
  • Using the design adviser
  • Calculating core and winding losses
  • Exploring the material/shape database

buck_inductor.py

  • Non-isolated inductor design
  • Working with DC bias and saturation
  • Wire selection for high currents
  • Powder core considerations

Creating Your Own Designs

All examples follow this general workflow:

import PyOpenMagnetics

# 1. Define requirements
inputs = {
    "designRequirements": {
        "magnetizingInductance": {"nominal": 100e-6},
        # ... other requirements
    },
    "operatingPoints": [{
        "conditions": {"ambientTemperature": 25},
        "excitationsPerWinding": [{
            "frequency": 100000,
            "current": {"waveform": {...}},
            "voltage": {"waveform": {...}}
        }]
    }]
}

# 2. Process inputs (adds harmonics)
processed = PyOpenMagnetics.process_inputs(inputs)

# 3. Get recommendations
result = PyOpenMagnetics.calculate_advised_magnetics(processed, 5, "STANDARD_CORES")

# 4. Analyze results - result["data"] contains list of {mas, scoring, scoringPerFilter}
for item in result["data"]:
    mag = item["mas"]["magnetic"]
    losses = PyOpenMagnetics.calculate_core_losses(
        mag["core"],
        mag["coil"],
        processed,
        {"coreLosses": "IGSE", "reluctance": "ZHANG"}
    )
    print(f"Core losses: {losses['coreLosses']:.3f} W, Score: {item['scoring']:.3f}")

Additional Resources