Plotting Magnetization Curves
Here is a circuit you can use to measure the B -H characteristics of a ferromagnetic component.
It works best with ring cores (toroids) but should be usable with other shapes having a closed magnetic path. The circuit, as shown, will plot the hysteresis loop for a half-inch diameter, high permeability ferrite ring; adaptations for other components are also given.
The circuit diagram.
Winding the core.
The equipment
Adjusting the circuit.
Interpreting the curves.
Finding the hysteresis losses.
Troubleshooting.
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See also ...
[↑ Producing wound components] [A guide to the terminology used in the science of magnetism] [ Power loss in wound components] [Further example results with this circuit for other types of components] [ Faraday's law] [ Professional B-H plotting]