Swend
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While calculating Voltages and Currents with Pulse Transformer, how did you model it ?? Because Ohm's Law cannot be applied to Transient Domain in which is your case.
I mean, you cannot find Voltages and Currents by simply inserting Ohm's law ,instead you have to know Model of the Pulse Transformer and you have to use State Variable Technique to find Transient and Private ( Steady-State) Solution of Integro-Differential Equation of the circuit.
You may use a Transient Simulator to predict the response..
I suggest you extract a accurate model of the Pulse Transformer ( it might be simple or complex) then use a simulator because calculating Voltages and Currents of such a circuit will be very difficult even more erroneous.I believe the manufacturer of that Pulse Transformer has a more or less accurate model, request it..Then you can compare measurements and simulations to crosscheck the failing point..Actually it's a physical circuit, not a simulation. And of-course I was wrong applying ohm's law. Basically I just wanted to check if calculated would yield something close to measured in order to (perhaps) know if my measurements are way off, so how do you suggest I go about that?
I suggest you extract a accurate model of the Pulse Transformer ( it might be simple or complex) then use a simulator because calculating Voltages and Currents of such a circuit will be very difficult even more erroneous.I believe the manufacturer of that Pulse Transformer has a more or less accurate model, request it..Then you can compare measurements and simulations to crosscheck the failing point..
I hear what you are saying, but there are some issues with that. First is that what's on the primary side cannot be simulated, and secondly I'm the manufacturer of the pulse transformer which a simple air-core transformer.
But what if I measure the inductance of each winding and use LTSpice to couple two coils together, then apply the physical primary side waveform to the simulated primary? would that yield a usable simulation result on the secondary side?
Air core xfmr's are notorious for very high magnetising current loading the driving voltage ( i.e. pulling it down), and not so great coupling to the sec ...
How do you measure it? Sure that the probes don't affect the circuit? The question isn't clear at all.I have a 1000 ohm resistor connected to the secondary winding of my pulse transformer, and I'm measuring voltage and current which is all fine.
How do you measure it?
Sure that the probes don't affect the circuit?
The question isn't clear at all.
calculate the voltage by applying ohms law -
Your probe is not responding well to the square pulse.
There is no square pulse anywhere, what you are seeing is the pulse.
Is it a similar divider as in your other thread?For voltage, a resistive 1000:1 voltage divider 100M/100K. For current, a Rogowski coil.
If so, I doubt that the voltage waveform isn't reproduced correctly....
I am not quite sure. How are you generating the pulse?
Is it a similar divider as in your other thread?
If so, I doubt that the voltage waveform isn't reproduced correctly.
Similarly, what kind of Rogowski coil and integrator circuit are you using? Did you calibrate voltage and current probes with a test generator?
No, I do not wish to know the internal details. I just want to know if you substitute a resistor instead of the pulse transformer, what kind of waveform you will get? say you use a 1k or 10k resistor instead of the transformer primary
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