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How to investigate CEMF in an inductor ?
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makerman:
I'm investigating the stored energy in an inductor, the standard equation says it's : W=1/2LI^2, implying that the two ways of increasing the stored energy are by increasing either the inductance or the current, i'm looking into what happens when we have two inductors, both with the same resistance but one with significantly higher inductance, will the latter store more energy given the same power input?

The maximum transient over-voltage reading for the Rigol 1054Z is 1000v p2p, when i test either of the inductors many of the CEMF spikes are over this limit, what i need to do is calculate the average of all of the spikes, is this possible and are the voltage spikes bad for the scope ?


Thanks, Gary.


makerman:
No worries got it, this scope is amazing :)
Gyro:
Yes, you are risking front-end damage to your scope, It's really not that amazing!

Also the x10 probes won't be rated for anything like 1kV so will probably flash-over the internal 9M resistor, probably allowing more energy through to the scope (and damaging the probes).
makerman:

--- Quote from: Gyro on January 21, 2019, 06:44:57 pm ---Yes, you are risking front-end damage to your scope, It's really not that amazing!

Also the x10 probes won't be rated for anything like 1kV so will probably flash-over the internal 9M resistor, probably allowing more energy through to the scope (and damaging the probes).

--- End quote ---

Thanks Gyro, i've ordered one of these :

https://www.ebay.co.uk/itm/100X-P4060-High-Voltage-2KV-2000V-Oscilloscope-Scope-Passive-Clip-Probe-60MHz-UK/332873577200?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Gyro:
Yes, a high voltage x100 is what you want.  :-+
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