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Question about measuring current in a circuit?

 
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carterturner



Joined: 19 Aug 2017
Posts: 78

PostPosted: Wed Sep 13, 2017 6:55 am    Post subject: Question about measuring current in a circuit? Reply with quote

Hiiii...

There is something I want to ask about the circuit that I share.The circuit is used to control a motor(draws about 30 amps.)
my question is this circuit how to measure current , what I understand is that the current is measured by raising the voltage on the resistor with the op-amp. but Why power line like this , Is there a shunt res which one is it?
I can not explain exactly, but if you understand something from these pictures.

Thanks!

I didn't find the right solution from the Internet.

References:-https://forum.allaboutcircuits.com/threads/question-about-measuring-current-in-a-circuit.139978/

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