I used ten SCRs connected in serious to output a high voltage pulse, a reversed current appeared almost 50 ms after the main current pulse, and the all switches closed. Details are in the attached figures
I doubt it is the current sensor's problem. The current should follow the voltage. But here it is very clear the e-fold fall time for current is much smaller than for voltage. At ~ 80 ms SCRs stop conducting as the current is too low, and that explains voltage waveform has a step.
If the current sensor is near ideal, then it will have a step too. You will note that your current sensor is something like a differential sensor.
The water resistor is a capacitive load. According to the simulation result, the current pulse is turely much shorter than the voltage pulse. For 2 kOhm load (measured by LCR meter), there is no reversed current. Meanwhile, the current sensor model is Pearson 6585
The water resistor is a capacitive load. According to the simulation result, the current pulse is turely much shorter than the voltage pulse. For 2 kOhm load (measured by LCR meter), there is no reversed current. Meanwhile, the current sensor model is Pearson 6585
Pearson coil has a limit of integral of I*t. There is application note in their website. You will note that current waveform already has negative after the first peak.
For 2 kohm load, the RC time is less, and it is possible the coil can handle it well.
I^2t of the sensor is 5 A^2s, i believe it can handle the current pulse since the peak current is only 500 mA. Thank you for your answer!
I^2t of the sensor is 5 A^2s, i believe it can handle the current pulse since the peak current is only 500 mA. Thank you for your answer!