Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Mon Mar 21 2016, 08:13PMive got some oscillograms I'm trying to upload, give me a few minutes.
Related thread:
HV Flyback Bench Top Power Supply for Lab.Related thread:
Microcontroller Timed Flyback
The above oscillogram shows the flyback output at 36kV, (20kV per div) which strongly agrees with the ball-gap electrode measurement of 39kV. Pulse repeats on 150-ish uS intervals. load was 30 MOhms, indicating 1.2 mA and 43 watts, with sig figs I think. Keep in mind there are 3 or so seconds where this 36 kV appears, then 3 or so seconds where it jumps to 40 kV. I'm trying to sort that out. but the wavform is exactly the same. No drooping or anything.
Ive been changing the microcontroller timing with great results. My beloved 555 timer never would have filled this experiments requirements. I presume the above graph looks the way it does is due to the fact that a flyback is a complicated RCLD circuit, with a lot of non-ideal garbage tossed in.
I should have ran the 'A' channel off the mosfet gate at the same time as the this 'B' high voltage trace. Ugh.
my acrylic ball-gap. At 13mm the results seemed repeatable and credible. these balls are 0.625 inches in dia. (15.9 mm). I wish I could figure out my FEMM 4.2 program.
Input current pulse. Voltage as measured through a 0.50 ohm precision resistor. 17.4 Amp pulse.
46 kV with logic pulse.
After putting the load resistors under oil I got it to 50kV, with no other changes. I think there was some spraying of the ends. It did get less "hissy".
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Tue Mar 22 2016, 12:52AM
Killed my oscilloscope,
And not in the way you might think. The high voltage end, which I always feared wasn't the failure.
from USB insturments website:
note this bit : Maximum input voltage +/- 50V DC (35V RMS AC) I think I put 62 VDC into the B port, saw a flash crackling and puff of smoke.
I may have botched that bit. and I think I may have cuased an elevated ground problem that set it in motion. The A channel is working but so noisy as to be useless.
well that's 220 US$ down the drain.
Patrick, Tue Mar 22 2016, 12:52AM
Killed my oscilloscope,
And not in the way you might think. The high voltage end, which I always feared wasn't the failure.
from USB insturments website:
Features:
· Combined Oscilloscope, Data Logger, Signal Generator, Spectrum Analyzer,
Voltage and Frequency Meter functions
· 12-Bit ADC Resolution
· 12-Bit data streaming simultaneously on both channels.
· 32k Byte Waveform buffer
· Oscilloscope Mode - 20M S/s sampling rate ( repetitive ) 1M S/s native
· DataLogger Mode - up to 50k S/s 12-bit data streaming simultaneously on both
channels
· Maximum input voltage +/- 50V DC (35V RMS AC)
· AC / DC Coupling
· Edge, min/max, pulse width and delayed trigger modes
· Analog Bandwidth 250KHz
· Inbuilt 10-bit waveform generator with +/- 3.5v output range and 1k buffer.
· Hardware upgradeable over USB
· Bus Powered USB Interface ( 250mA )
· EasyScope II ( Windows ) software (see downloads)
· EasyLogger ( Windows ) software (see downloads)
· Interface DLL's and code samples for 3rd party developers included
· Instrument carrying bag included
· Attractive enclosure with rubberized mouldings
· Dimensions - W: 116mm x H: 30mm x D: 100mm
note this bit : Maximum input voltage +/- 50V DC (35V RMS AC) I think I put 62 VDC into the B port, saw a flash crackling and puff of smoke.
I may have botched that bit. and I think I may have cuased an elevated ground problem that set it in motion. The A channel is working but so noisy as to be useless.
well that's 220 US$ down the drain.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
hen918, Tue Mar 22 2016, 07:57PM
And it was all going so well...
but 220usd? For that?
hen918, Tue Mar 22 2016, 07:57PM
And it was all going so well...
but 220usd? For that?
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Tue Mar 22 2016, 08:24PM
yes that was from about 4 years ago its $188 now. look here :
its not even great by todays standards. I'm looking on ebay.
Patrick, Tue Mar 22 2016, 08:24PM
hen918 wrote ...
And it was all going so well...
but 220usd? For that?
HaHA !And it was all going so well...
but 220usd? For that?
yes that was from about 4 years ago its $188 now. look here :
its not even great by todays standards. I'm looking on ebay.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Proud Mary, Tue Mar 22 2016, 10:24PM
That's rotten luck, Patrick. I don't connect my scope - a cheap and cheerful Atten 100MHz digital storage scope - to anything I'm at all doubtful about, because it would be a good while before I could afford to buy another.
Proud Mary, Tue Mar 22 2016, 10:24PM
That's rotten luck, Patrick. I don't connect my scope - a cheap and cheerful Atten 100MHz digital storage scope - to anything I'm at all doubtful about, because it would be a good while before I could afford to buy another.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Ash Small, Tue Mar 22 2016, 10:47PM
I have 'scopes I only paid £20 for to use for stuff like this
Ash Small, Tue Mar 22 2016, 10:47PM
I have 'scopes I only paid £20 for to use for stuff like this
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Tue Mar 22 2016, 11:04PM
4 or 5 years ago this was the cheapest I could find. but ive got a source on another, has 10 times the resolution, better features and is about $70 ! some one should tell USB Instruments company ! time to look at your competition guys !
I sure wasn't going to use one of those nice Rigols' you guys have. I never forgive my self if I blew one of those.
I am happy to be getting 50kV with a no sag, and 1.6 mA, which means I can further my "Lifter / ionocraft" research
Patrick, Tue Mar 22 2016, 11:04PM
4 or 5 years ago this was the cheapest I could find. but ive got a source on another, has 10 times the resolution, better features and is about $70 ! some one should tell USB Instruments company ! time to look at your competition guys !
I sure wasn't going to use one of those nice Rigols' you guys have. I never forgive my self if I blew one of those.
I am happy to be getting 50kV with a no sag, and 1.6 mA, which means I can further my "Lifter / ionocraft" research
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Sat Mar 26 2016, 04:51AM
Ok ive got the oscilloscope working again and some high voltage data. Particullary the "Biefeld–Brown effect" (ion-wind) of course my research has been extremely secret since 1995. My secrecy is about to ease up. And devices like this will be used to support my future research.
As we all know the "electro-gravitics" type pseudo-science is bogus with little or no repeatable data. We humans, at this point, have no ability to use electric forces or gravity to influence one another. That may change in decades and centuries to come. But at the moment, its crap.
Patrick, Sat Mar 26 2016, 04:51AM
Ok ive got the oscilloscope working again and some high voltage data. Particullary the "Biefeld–Brown effect" (ion-wind) of course my research has been extremely secret since 1995. My secrecy is about to ease up. And devices like this will be used to support my future research.
As we all know the "electro-gravitics" type pseudo-science is bogus with little or no repeatable data. We humans, at this point, have no ability to use electric forces or gravity to influence one another. That may change in decades and centuries to come. But at the moment, its crap.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Proud Mary, Sun Mar 27 2016, 05:32PM
Rather like LENR, where genuine, sincere researchers have discovered anomalies which have yet to be explained, while the whole field has been rendered toxic and non-respectable by con-men making inflated claims unsupported by the data.
Proud Mary, Sun Mar 27 2016, 05:32PM
Patrick wrote ...
As we all know the "electro-gravitics" type pseudo-science is bogus with little or no repeatable data. We humans, at this point, have no ability to use electric forces or gravity to influence one another. That may change in decades and centuries to come. But at the moment, its crap.
As we all know the "electro-gravitics" type pseudo-science is bogus with little or no repeatable data. We humans, at this point, have no ability to use electric forces or gravity to influence one another. That may change in decades and centuries to come. But at the moment, its crap.
Rather like LENR, where genuine, sincere researchers have discovered anomalies which have yet to be explained, while the whole field has been rendered toxic and non-respectable by con-men making inflated claims unsupported by the data.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Fri Apr 01 2016, 06:44AM
Ive got a whole new oscillsope, very cool and has all the features I was missing in the old 188 $ one. and this one only cost 70$
It does lack an external trigger and you cant change the trace colors.
its midnight, ill post screen caps in the morning.
Patrick, Fri Apr 01 2016, 06:44AM
Ive got a whole new oscillsope, very cool and has all the features I was missing in the old 188 $ one. and this one only cost 70$
It does lack an external trigger and you cant change the trace colors.
its midnight, ill post screen caps in the morning.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Thu Apr 07 2016, 08:58PM
I'm wanting it X-rayed' like this.
Patrick, Thu Apr 07 2016, 08:58PM
I'm wanting it X-rayed' like this.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Proud Mary, Thu Apr 07 2016, 10:09PM
Is it in HR Diemen? That would show you how many elements there are in the 'diode split'.
Proud Mary, Thu Apr 07 2016, 10:09PM
Is it in HR Diemen? That would show you how many elements there are in the 'diode split'.
Re: Pulse Frequency Modulated (PFM) Flyback Transformer.
Patrick, Thu Apr 07 2016, 10:39PM
but I want to see the physical construction.
Patrick, Thu Apr 07 2016, 10:39PM
Proud Mary wrote ...
Is it in HR Diemen? That would show you how many elements there are in the 'diode split'.
Yes 3 coils, and 3 diodes.Is it in HR Diemen? That would show you how many elements there are in the 'diode split'.
but I want to see the physical construction.
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