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In Reply to: RE: Screen shots posted by Tre' on September 05, 2016 at 17:57:11
Tre,Put the scope in time domain mode and compare the measured waveforms. Don't look at bode plotting. It doesn't say much for the reflection from the load to the source.
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
Edits: 09/05/16Follow Ups:
I think what you need to do is build it and measure for yourself.
Dave and I have tried to help you but you just want to argue.
I'm done.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Tre,I did not argue with both of you. I am only correcting the wrong here.
What is the 12V DC source? It is the 12V Battery, right? Where does the voltage come from and how is it measured?
Current comes from the positive terminal of the battery to the negative terminal of the battery, right? And we measured the voltage at the two terminals. No resistor added, right?
What is the 12V AC Source? Same thing, right? We again, don't measure with any series resistor, right?
Is there anywhere in any text book did you see that battery voltage is measured with a series resistor and call that resistor as part of the DC source?
The text book might refer to the battery internal resistance but it's not an actual resistor attached to it.
Such simple principles. Why do I need to argue with you over it?
And you can sim like I said and you can post results if you want. No one is stopping you. But like I said, Sims have it's own limitations.
I can post real test data if you like.
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
Edits: 09/05/16
"The text book might refer to the battery internal resistance but it's not an actual resistor attached to it."
No it's not.
But a battery with 1 ohm of internal resistance vs. a battery with .5 ohm of internal resistance and a .5 ohm series resistor attached to it will behave the same.
If you have all the answers why did you come here asking questions?
"I can post real test data if you like."
I think you should.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Here are 4 pictures.
The top yellow trace is the actual waveform coming out from the FG. It sets to about 20V at roughly 20Hz.
The bottom blue trace is for the measured waveform with the probe.
Probe hookup / measured points can be seen in the picture.
Take a go at it.
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
What is the inductance of the IT?BTW In LT spice you can set the resistance of the DC source to any value. Same for a AC source.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 09/05/16
I don't know the inductance at 20Hz on the primary. I also don't know the capacitance at 20Hz on the primary. I also don't know any inductance of the secondary at 20Hz. I also don't know the capacitance of the secondary at 20Hz. Repeat that all the way from for DC to Daylight (whatever it is) Hz.I also don't know the size of the magnetic wire, the turn count of the wire on primary and secondary side, the magnetic core materials (Amophous, Permalloy, HyperMalloy, M9, M6; whatever) used, what core type (EI or C or Toroid) it use; etc.
I know it is 10K Zp transformer with step up ratio of 1:4. I also know the DCR of the primary and secondary but I am not going to tell you yet (not yet now).
Why? Because no transformer manufacturer tells you any inductance value or capacitance value or DCR values.
They only tells you the wattage it can handle, the impedance of the primary and the secondary, the insertion loss (if you are lucky), and the FR and Impedance curve (if you are really lucky).
Almost all of them also failed to mention that maximum voltage it can be operated for and the bandwidth.
So, I can't tell you all of them. But these 4 pics I posted have more than enough information to synthesize what's going on there.
You don't need to churn out numbers for me. Tell me what's going on at the probe point at the input of the transformer from these pics.
Again, it is a 10K primary transformer, open load on the secondary.
Yes, I recall you can set the values. But it doesn't mean it's almost accurately taken into account.
Anyway, I did tell you to try at different voltage levels and observe the waveform like in my screen shot.
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
Edits: 09/05/16
Internal resistance of the battery is not the same as the external series resistors! Some battery may have 0.0001ohms, some may have a little higher.
But in SIM, battery have extremely low resistance value like 0. A little smarter sim let you define the resistance.
Is it the same for you?
Yes, I will post pics. Do the AC analysis for me when I do.
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
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