DC inductance measurement

是梵蒂冈

DC inductance measurement [Copy link]

What should I do if I want to measure inductance using direct current?

maychang

[What should I do if I want to measure inductance using direct current?]

You cannot measure inductance using DC.

qwqwqw2088

Every problem has its source

I'm curious why the OP uses DC to measure inductance.

Is it because there are DC interfaces everywhere?

led2015

No, there are only safety risk warnings about damage to circuits and measuring equipment on the Internet.

zhangjsh

DC can only measure the DC resistance of the coil. In fact, the inductance is related to the test frequency.

吾妻思萌

Let's use the bridge method. Inductance is a component that can hinder the alternating current. If there is no change, it is equivalent to a wire. Therefore, the amplitude and frequency of the alternating current are very important parameters. It is recommended to read more about the basic knowledge of components.

gl82

Can't measure it, brother.

MrCU204

Yes, but it's not reliable.

If you really want to use DC to measure, just capture the transient state.

Connect an ammeter in series and an LED, and inspect visually, but can you react quickly? !

A series resistor or a resistor plus a current transformer can be displayed using an oscilloscope, but it is not very accurate.

MrCU204

The thickness of the wire, the thickness, height and diameter of the coil,

Throwing these data into an online calculator will give you the inductance of the coil (minus the core).

tsgnge

Direct current passes through the inductor and can measure the coil resistance

lanhua

What should I do if I want to use direct current to measure inductance?

Why do we have to do this?