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Is this a valid method to measure the inductance of a brushed DC motor?

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fishandchips:
Hello, I came across the following simple method to measure the inductance of a DC motor. I need some expert advice. Could forum users please check if the method is valid? How accurate will the inductance measurement be using this method?

http://www.dos4ever.com/inductor/inductor.html

In Step 4, it reads "Connect the unknown inductor parallel to the oscilloscope (Fig. 2.1)." I cannot see an inductor parallel to the oscilloscope. In the case of trying to find the inductance of a DC motor, am I supposed to connect a wire from the DC motor to the ground of the scope while connecting the other wire from the motor to the input of the scope? Usually to feed the input from the functional generator to the oscilloscope and see the signal on the screen, I just use one cable.

I cannot see clearly what is in the white circle in Fig 2.1B. Any idea?

Thanks

Benta:
Seems overly complex to me.
When I have an unknown inductor, I feed it with a square wave voltage and measure the resulting triangular current through the inductor.

Why do you need to know the inductance of your motor? It will likely vary quite a lot with armature angle.

fishandchips:
I need to model the motor in computer simulation.

neko efecktz:
It looks like the inductor is just above the scope terminals.
looks like a square base with a round coil, all encapsulated.
There is one in the picture at the top of the page.

fishandchips:
I see. So, if I want to measure the inductance of the DC motor, how do I connect the two wires from the motor to the scope/function generator?

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