Hi!
I'm using a 50/1 A CT and I want to read current passing through a single phase motor with a microcontroller, I've done all the programming and rectifying stuff and It's perfectly working with a 100mV to 1V 60Hz sine wave provided by a function generator.
I've also simulated this ammeter project and it's working (the circuit is uploaded on this post), but the problem is that I'm not sure if my CT is working.
I think that for a 1Ω burden resistor, the voltage on the resistor should be Vo = Ip*0.02*1Ω. Where Ip is the actual current flowing through the phase and 0.02 = 1/50. So I'm trying to measure the voltage with different resistor values and check if it's the voltage expected, what resistor value do you recommend for a CT burden resistor?
I've check information about calculating burden resistor on the browser, but it's all about increasing the voltage to a Vref+/2 level when a dc bias is used. Since I'm using a opamp base precision rectifier, I'm not strictly calculating an specific burden resistor value.
Any suggestion will be helpful. Thanks.
I'm using a 50/1 A CT and I want to read current passing through a single phase motor with a microcontroller, I've done all the programming and rectifying stuff and It's perfectly working with a 100mV to 1V 60Hz sine wave provided by a function generator.
I've also simulated this ammeter project and it's working (the circuit is uploaded on this post), but the problem is that I'm not sure if my CT is working.
I think that for a 1Ω burden resistor, the voltage on the resistor should be Vo = Ip*0.02*1Ω. Where Ip is the actual current flowing through the phase and 0.02 = 1/50. So I'm trying to measure the voltage with different resistor values and check if it's the voltage expected, what resistor value do you recommend for a CT burden resistor?
I've check information about calculating burden resistor on the browser, but it's all about increasing the voltage to a Vref+/2 level when a dc bias is used. Since I'm using a opamp base precision rectifier, I'm not strictly calculating an specific burden resistor value.
Any suggestion will be helpful. Thanks.