Ranbeer Singh
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We use the attached circuit for 10A:1A CT. But for this motor we need a some accurate circuit.Please try to provide all informations at once. Not piece by piece....
A drwaing surly would be very heplful
I was looking for the same as you described. Shunt or hall effect based linear current sensing circuit.My first idea: a non isolated current measurement with a shunt.
You do know that you can wrap multiple turns of the current-carrying wire through the CT core to increase the sensitivity of a current transformer.I can not use a current transformer available in market due to very low power consumption
Realy i was thinking about this. If i use 10 turns 18awg wire in primery and 10 turns 18awg in secondary. It will be 1:1 CT and easily solves my problem. I also attached schematic for same.You do know that you can wrap multiple turns of the current-carrying wire through the CT core to increase the sensitivity of a current transformer.
Thus 10 turns would increase the sensitivity by 10 times.
You are right, we can use direct ac to adc. But need some protection against any type of high voltage spike and short circuit in primery. We can remove capacitor and discharge resistance.I personally
...would minimize the hardware effort and feed the AC to the ADC (DC shifted for sure) .
So you are most flexible to adjust all you want with software.
My concern is how to protect sensing circuit when motor short circuit.
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