Author Topic: Stan Resonance finally cracked! by Sebosfato  (Read 40737 times)

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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #56 on: March 03, 2011, 16:27:55 pm »
Just found this, webmug, and Kb, http://www.fujitsu.com/downloads/MICRO/fma/pdf/PLLapp.pdf


They have an evaluation for pll controlled by computer and software..  check this out...


http://www.fujitsu.com/global/services/microelectronics/product/assp/pll/

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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #57 on: March 03, 2011, 17:11:08 pm »
Hello kali,


There is difference between Vcc and Vdd and Vee? in the patent meyer use the three, i would like to know if means only three voltage sources of different voltages or if there is another reason for the different names..


Thanks man

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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #58 on: March 03, 2011, 17:31:01 pm »
I wanted to help you all understanding the pll vic i'm working on so here it is. So like they say in the university i used my time to produce knowledge.


The Tx5 or Tx4 is not only limited to those in the transformer so can be added also serially.


The feedback could be a current transformer coupled capturing the recirculating current or could be a coil in the same transformer or yet in the series added coil core... 


KB,


You could try downloading the simulator so you can run without the browser... 


Not sure about the waveform.. Is not what i see here... I think that the waveform you see when the coil is shorted is only the LR damped oscillation according to the respective time constant... not sure.-
Sebosfato, you left out the "Resonant Scanner Circuit" and the (internal) lock feedback from the PLL. It doesn't scan frequency up and down in your PLL bandwidth range (R1 and R2)?
So it wouldn't go to lock with the Pickup coil above max. or below min. frequency just like Stan his circuit.

But, I could be wrong and you are just making your own design.

br,
Webmug

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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #59 on: March 03, 2011, 17:48:12 pm »
I think that the resonant scanning circuit is not very very necessary since also in stans design there was the manual scanning, and so as the lock in, as it was used as a logic stage to implement the resonant scanning circuit.


I know this pll will work cause is the same i used in the past for my resonance experiments and when you adjust the knob to the resonant frequency you can actually turn of the circuit and turn on and you will see that the circuit get into resonance automatically.


You can see this in my youtube channel. in the power video.. Is the same circuit but have some improvements now...

The pll senses the frequency and adjust automatically the frequency if it is in the lock range, so basically you need to adjust the lock range so it is able to lock to the resonance. Usually the center frequency should be the resonant frequency so the lock vary in higher or lower frequency depending of the variation of the resonance frequency...


I don't remember well now but i think that R2 define the lock min frequency, and R1 the max frequency so if you adjust the R2 you will change the center frequency...


Of course when we achieve the resonance we can tune the pll to improve its performance...


I think that the resonant scanning circuit is just to speed up the lock in.. Normally this min time  to lock would depend on the filter design, but if you disconnect the filter like the scanning circuit thru the logic of the lock indicator do, you are able to get around this min time, thats why i think stan implemented the resonant scanning. I think that he used a relatively big capacitor for the filter to ensure stability of the resonance what would makes this lock in time to be very big, for a practical use like in an automobile, for testing is not necessary. I believe...


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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #60 on: March 03, 2011, 18:08:14 pm »
I forgot to add the series diode from the primary to the drain of the mosfet... 1200v 30 amps ultra fast is ok, but higher amp rating would be better.


!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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circuit sim help
« Reply #61 on: March 04, 2011, 16:22:17 pm »
Hi Sebo, others  help help

I'm having trouble pasting your code into the circuit simulator.  Is there a way to do it that is clear to understand.  The paste option does not highlight for use.  Maybe I could use a desktop  circuit simulator.  Is there one your recommend?  I use linux.

kb


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Re: Stan Resonance finally cracked! by Sebosfato
« Reply #63 on: March 04, 2011, 16:57:47 pm »
Seb'

worked like a charm.. thanks for your quick reply, you are a solid resource....  much obliged partner