Author Topic: UD 2.7C Phase Lead Switching glitch at the 7 swing  (Read 532 times)

Offline Admiral Aaron Ravensdale

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UD 2.7C Phase Lead Switching glitch at the 7 swing
« on: January 18, 2024, 11:10:33 AM »
Hi,
get my coil Up and had first sparks.
Currently I struggle to get the phase lead in place.
I use 55-60V DC on the Bus Rail for the test.
Attached my MicSig Probes and two 1000:1 Feedback/Overcurrent coils. One only for measuring the feedback for the scope.
Secondary has 90.6kHz primary taped at 81kHz
C33 = 1nF
CM200DY-24NF

I try a lot the last days but I always get a glitch after the 7 swing! I used different Slot7 Inductors try Primary turns from 70-90kHZ nothing always the same.
So now I run out of Ideas what happens there.
Is it the low Bus Voltage?
Is it a measuring issue?
Interuptor issue?
Is C33 to low for 80-90kHz?
Also on a close look the switch at the 6 swing is also a little bit to early but can this cause an double on on the 7 swing?

JUST remove the scope picture had an Issue with feedback contact to scope. It looks not so nice....
OK new Scope picture


« Last Edit: January 18, 2024, 12:18:17 PM by Admiral Aaron Ravensdale »

Offline davekni

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Re: UD 2.7C Phase Lead Switching glitch at the 7 swing
« Reply #1 on: January 19, 2024, 05:11:40 AM »
Scope traces need to be defined to be of use.  What signal is on ch1 and on ch2?
Most scopes can be set for probe scaling.  If using 500x probe, set scope for that.  Then displayed volts/division will be correct.
Scope vertical channels are set for AC coupling.  DC coupling is better for most measurements.
What burden resistor is on scoping CT secondary?
UD2.7 has two CT inputs.  Do you have a third CT for scoping?
David Knierim

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Re: UD 2.7C Phase Lead Switching glitch at the 7 swing
« Reply #1 on: January 19, 2024, 05:11:40 AM »

 


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