Inductor Core Saturation Measurement

The minimum position is the highest frequency shortest charge time and smallest peak inductor current which is a sensible basis for beginning measurement of a new inductor. Inductance will drop as the core enters saturation.

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Waveform Audit Is Your Inductor Saturated Power

Hard saturation black soft saturation red now that you know what saturation current is and how it relates to the effective inductance value how can you tell that an inductor is saturated.

Inductor core saturation measurement. It seems to work pretty well up to about 100a or so. Ive got so many inductors ive got little data on that came from surplus catalogs and now i realize i cant use them without figuring this out. I wouldnt mind making up a pic circuit or something similar to show it.

More current further reduces inductance. As you increase the load towards saturation the straight portion of the triangle wave will start to assume an upwards kink ie the rate of rise of current with time will increase as you enter saturation. An inductor saturation current tester.

I built this pretty simple inductor saturation current tester for testing the saturation current of inductors. From left and middle and right. Kalle tipped us about a quick project he made over a couple of evenings.

One rapid way to determine this is to measure the current flowing into the inductor. In a more sophisticated application saturable core inductors and magnetic amplifiers use a dc current through a separate winding to control an inductors impedance. All the components used for it were salvaged from a beefy telecom power supply whi.

Inductor saturation while writing a column for circuit cellar i managed to utterly botch the choice of a boost converter inductor. Whats the best way to measure the saturation current of an inductor. I had the need to test the saturation current of some inductors i had wound.

The frequency is then dropped increasing the peak current until either the core saturation is visible or the tester runs into its current limit. Varying the current in the control winding moves the operating point up and down in the saturation curve controlling the ac current through the inductor. The inductor the rightmost one in the lineup was a common mode choke from a power supply so i figured it had enough meat for 300 ma of boost current.

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