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#1
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Mahmut Oktay
09-24-2013 08:17 AM

Measure output current of an ac induction motor

I want to measure the output current of an ac induction motor using shunt resistors and current transducers. 2.5V shows zero point,while 5V indicates Imax and 0V indicates -I max.I need some documents
09-24-2013 10:51 AM
Top #2
Swaroop Bhushan
09-24-2013 10:51 AM
Hi Mahmut, you could achieve that using two opamp stages; non inverting amplifier with shunt resistor at input, then a level shifter with 2.5v offset.
09-24-2013 01:44 PM
Top #3
Chuan Yan
09-24-2013 01:44 PM
Hi Mahmut, not sure your range requirement. FHS 40-P/SP600 is a cheap and good one. Datasheet has recommended circuit. You need to compensate for flux influence by other two phase on ADC.
ACS756 is another choice.
09-24-2013 04:02 PM
Top #4
VASU MANAVALAN
09-24-2013 04:02 PM
Hi,
Suggestion given by Swarup is a right solution, I have implemented this concept. for a ACIM. Also check Chuan Yan idea.
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