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Yesterday, 14:03
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
Yes, but in this data series, the current is never zero, otherwise the calculating script throws a divide by zero warning, which it doesn't in this case.  so no zeros.
As I have said several... 
Yesterday, 10:20
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
Yes that's how it's calculated.
Yes, I agree in the case of singular points, but 6.7e10 as in the plot is still finite.
And what if both U(t) AND I(t), as the case is here, are not... 
11th November 2019, 16:26
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
As a service for the persons reading this post, I made the following calculations:
I took the first full pulse from the data file (SDS00001.CSV attached in previous thread) and it looks like this... 
10th November 2019, 13:33
 Replies
 2
 Views
 353
Closed: Re: Energy doesn't FLOW the way you THINK! (Electrodynamics)
I agree the mathematics is definitely not trivial, that's why it even more impressive that Nick Lucid (the video channel owner) still manages to covey the essence of such complex math only by the use...

9th November 2019, 18:15
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
I had to make a new measurement to record the full pulse and a bit more. The only change I have made is the nominal value of "R" I lowered it from 1.1M to 883K which resulted in higher voltage and...

9th November 2019, 18:09
 Replies
 2
 Views
 353
Closed: Energy doesn't FLOW the way you THINK! (Electrodynamics)
Hi friends
It seems to me that fundamental electric theory is no longer taught in school, which is a shame as it results in everyone having their own intuition and interpretation about it, leading... 
8th November 2019, 14:42
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
I don't appreciate your irony. Where do you find excess energy? The negative current goes back to the source's power supply, the power supply performs work (Work as in W = F * d * cosθ) on it at a...

8th November 2019, 10:35
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
In stead of expressing your personal distrust maybe you should start by posing me a question. Obviously the traces don't start "out of nothing" I just chose to start at that particular point when...

5th November 2019, 17:04
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
I would say at least one, but I am willing to entertain the possibility of two.
I vote in favor of that suggestion, I already spent $1.000 on the CT, if the CT is yielding incorrect results I... 
5th November 2019, 16:11
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
Hi Klaus
The simple and only reason I talk about R as an ohmic load is:
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I did not say it behaved like an ohmic load, because according to the measurements it definitely doesn't,... 
4th November 2019, 13:53
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
Hi Klaus.
First let me make my intentions very clear:
What I have recorded is NOT the desired result, so I need to establish a baseline to move away from the current result. I need... 
3rd November 2019, 19:57
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Re: Ohm's Law and Power calculation problem
Hi Klaus
First I made a typo, I mixed the UI value up with IIR value, here are the corrected values.
(UI) P = 3.731 W
(UUR) P = 25W
(IIR) P = 809.471 W 
3rd November 2019, 17:05
Thread: Ohm's Law and Power calculation problem
by Swend Replies
 27
 Views
 1,008
Closed: Ohm's Law and Power calculation problem
Hi friends,
I understand there are three ways of calculating power
(UI) P = U * I
(UUR) P = U² / R
(IIR) P = I² * R
When I measure voltage, current and resistance in my circuit,... 
26th August 2019, 12:22
Thread: Transformer: current loss
by Swend Replies
 7
 Views
 436
[SOLVED]Closed: Re: Transformer: current loss
Not luck, but fingerspitzengefühl and rubber tape ;)
   Updated   
The left one aka "suckyI" is the aircored one. I measured the "inductance" of the primary (with the secondary... 
25th August 2019, 21:13
Thread: Transformer: current loss
by Swend Replies
 7
 Views
 436
[SOLVED]Closed: Re: Transformer: current loss
Klaus, I didn't say that I expected same power with same current. I said the voltage is stepped down by a factor of 10, but the current stays the same i.e. there is a ten fold power loss which...

25th August 2019, 15:33
Thread: Transformer: current loss
by Swend Replies
 7
 Views
 436
[SOLVED]Closed: Transformer: current loss
Hi friends.
I have now two transformers which both suɔʞ at what they do, so I have named the left as "suckyI" and the right as "suckyII" (the black tape is selfvulcanizing rubber, excellent at... 
22nd August 2019, 19:10
Thread: Determine Transformer Loss
by Swend Replies
 6
 Views
 522
Closed: Re: Determine Transformer Loss
I think I just have come up with a extremely bad design that is extremely lossy.
Thank you, And how about the way I calculate power i.e. can I calculate average power by summing the... 
22nd August 2019, 17:03
Thread: Determine Transformer Loss
by Swend Replies
 6
 Views
 522
Closed: Re: Determine Transformer Loss
Hi arajur
Here is a picture of one. I use one to measure primary voltage and a second one to measure secondary voltage.
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This is exactly my point, it must be very inefficient,... 
21st August 2019, 11:37
Thread: Determine Transformer Loss
by Swend Replies
 6
 Views
 522
Closed: Re: Determine Transformer Loss
OK, I will try to rephrase my question.
Accorcing to electronicstutorials.ws in a ordinary powertransformer with sine AC, the efficiency is
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And the power is calculated like this... 
20th August 2019, 15:46
Thread: Determine Transformer Loss
by Swend Replies
 6
 Views
 522
Closed: Determine Transformer Loss
Hi friends.
I would like to know the loss (power/energy) in a aircore pulse transformer of my own fabrication.
What we are looking at is this:
155096
I'm measuring voltage with two... 
20th August 2019, 12:47
Thread: Bridge Rectifier won't Rectify
by Swend Replies
 26
 Views
 1,229
Closed: Re: Bridge Rectifier won't Rectify
Yes that's what I did, but I wrote the opposite., sorry. And now I changed caps because the 1n blew up it was only 3KV. So I found some old USSR caps of 22p 12KV put those across the 100M, and a...

20th August 2019, 10:29
Thread: Bridge Rectifier won't Rectify
by Swend Replies
 26
 Views
 1,229
Closed: Re: Bridge Rectifier won't Rectify
So I made a 100:1 with 100M+100n/1M+1n and it also works. I was actually using 100:1 until this voltage rise thing threw me off in the wrong direction. The top resistor is made of glass and the...

20th August 2019, 09:04
Thread: Bridge Rectifier won't Rectify
by Swend Replies
 26
 Views
 1,229
Closed: Re: Bridge Rectifier won't Rectify
Well, I tried adding capacitance (ranging from 33p to 2.2n) across the 100M, and what I saw on the scope was that the full 6Vpp from the signal generator appeared across the lower 100K resistor,...

19th August 2019, 10:06
 Replies
 23
 Views
 1,051
Closed: Re: Pulse transformer output measured vs. calculated?
I don't think there is one
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You only get the current after integration, see post #20 
19th August 2019, 09:12
 Replies
 23
 Views
 1,051
Closed: Re: Pulse transformer output measured vs. calculated?
Whats the reasoning for that the ramp should not be there? The trace in post #20 is the integrated result, the raw di/dt output is as below scope trace and does not show any DC offset. Here is a...
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