Simple execise to measure the ac current thru a coil!
Simple execise to measure the ac current thru a coil!
(OP)
I’m doing a simple experiment to measure the ac current thru a coil and I’m getting nowhere close to the calculated values. The coil is hand wound and has a value of 57mH when measured by an LCR meter. It also has a resistance value of 2.61ohms measured by the same meter. My power supply is 13.08 volts at 50 hz. If I do the math I get a reactance value of 17.9 ohms. The total impedance for the circuit is therefore 18.1 ohms. Connected to my supply of 13.08v, the calculated current is 0.722A.
Now when I build the circuit I see a current of 0.24A! Does anyone know why the discrepancy? Could it have something to do with the impedance of the power supply?
Thanks
Now when I build the circuit I see a current of 0.24A! Does anyone know why the discrepancy? Could it have something to do with the impedance of the power supply?
Thanks






RE: Simple execise to measure the ac current thru a coil!
RE: Simple execise to measure the ac current thru a coil!
http://www.google.com/imgres?imgurl=http://info.ee...
So I would not expect inductance of iron core device to remain constant as test voltage is varied.
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(2B)+(2B)' ?