Hi, Is this kind of current probe able to display on an osciloscope a change in current of a energized inductor ? Is it enought fast and accurate to display (di = Vin * dt/L) in a range of let say under 50Khz ? Thanks for your help ;)
Well this type has a bandwidth of around 2kHz according to the datasheet. So for typical SMPS-inductors which work at 50kHz upwards switching frequencies it is not fast enough. But there is an alternative for inductor-testing: The "Power-inductor checker" from Elm Chang elm-chan.org/works/lchk/report.html This in an ingenious little bit of test-equipment for checking when an inductor gets into saturation and becomes unlinear. We are planning to bring a modified version of the power-inductor checker as a kickstarter-project in the next 2 or 3 months. The orgininal version from Elm Chang didn´t work with my 555-timers. I had to make a little change in the circuit diagram. Best regards Roger
Hi,
Is this kind of current probe able to display on an osciloscope a change in current of a energized inductor ? Is it enought fast and accurate to display (di = Vin * dt/L) in a range of let say under 50Khz ?
Thanks for your help ;)
Well this type has a bandwidth of around 2kHz according to the datasheet.
So for typical SMPS-inductors which work at 50kHz upwards switching frequencies it is not fast enough.
But there is an alternative for inductor-testing:
The "Power-inductor checker" from Elm Chang
elm-chan.org/works/lchk/report.html
This in an ingenious little bit of test-equipment for checking when an inductor gets into saturation and becomes unlinear.
We are planning to bring a modified version of the power-inductor checker as a kickstarter-project in the next 2 or 3 months.
The orgininal version from Elm Chang didn´t work with my 555-timers.
I had to make a little change in the circuit diagram.
Best regards
Roger
Thanks a lot for the answer. I'll look forward to the release of this project.
@+