Hello dear community,
I've measured the current impulse of an impulse magnetization machine. In order to measure the Impulse I installed a rogowski coil and a normal current transformer with a ferromagnetic core at the supply line of the magnetization coil. They measure the same impulse curve - see attachment - but at the zero crossing you can see that with the current transformer the curve is remaining at the zero level. In contrast to it, the rogowski coil shows a negative offset. Ther was no offset at the beginning of the measurement. My question ist: Why does the rogowski coil show a negative offset at the end of the impulse? Has it got anything to do wiht the evaluation unit (integrator) of the rocowski coil?
Thanks for your help!!!
Andi
I've measured the current impulse of an impulse magnetization machine. In order to measure the Impulse I installed a rogowski coil and a normal current transformer with a ferromagnetic core at the supply line of the magnetization coil. They measure the same impulse curve - see attachment - but at the zero crossing you can see that with the current transformer the curve is remaining at the zero level. In contrast to it, the rogowski coil shows a negative offset. Ther was no offset at the beginning of the measurement. My question ist: Why does the rogowski coil show a negative offset at the end of the impulse? Has it got anything to do wiht the evaluation unit (integrator) of the rocowski coil?
Thanks for your help!!!
Andi
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