Author Topic: Kapanadze Cousin - DALLY FREE ENERGY (Read 11798596 times)

itsu · « **Reply #30 on:** September 21, 2012, 12:37:53 AM »

Quote from: verpies on September 20, 2012, 04:07:27 AM

Please increase the horizontal ns/div on your scope and compare the rise/fall times with and without the MOSFETs connected.

Ok, i made some tests with my MOSFETs and (old) toroid just to see how they behave.

It shows that there is way to much current running through the 2 turn primaries, so i need to start building another one.

Video of this testing here: http://www.youtube.com/watch?v=jwwLWSdm4pM&feature=youtu.be

I also started a breadboard build for the nanopulser using the LT1073, but realized that a breadboard is not a good platform for such a delicate pulser, but i will see what comes out of it.

Regards Itsu.

Vortex1 · « **Reply #31 on:** September 21, 2012, 01:29:58 AM »

Itsu:

Running at around 4.6kHz, you have not nearly enough inductance with two turns primary on your core. You should see a nice ramp, but your waveform shows nearly instant high current draw across your 0.1 ohm current sense resistor.

This core might be fine if you were switching at 50 kHz or more, but that would raise a host of other issues. I realize you want to maintain a certain frequency and turns ratio, therefore use a larger core and a few more turns on the primary until you see a nice sawtooth current ramp up.

Also remember what verpies pointed out earlier, that a load on the secondary is reflected to the primary, and a short circuit on the secondary will kill primary inductance (except for leakage inductance).

Tungsten filaments are extremely non-linear. A cold light bulb is a fraction of an ohm, a temporary near short on your secondary which is killing any primary inductance until it heats up. Right now it seems you need a lot more inductance to run at 4.6kHz.

I suggest using a resistor load of a thousand ohms or whatever you deem appropriate for the power into the load you expect to see in place of the bulb.

Right now your FET,s are your heater load, as you can see with so much of your power dissipated there and so little in the load.

You can switch to a light bulb later when the core inductance issue is resolved.

Verpies: Thank you for the chart posted earlier. It should be carefully studied by anyone designing blocking oscillators or any switchmode converters.

d3x0r · « **Reply #32 on:** September 21, 2012, 07:22:26 AM »

On the http://realstrannik.ru/forum/44-freeenergylt/81742-dally-ustanovka-free-energy.html forum they did a spectral analysis of the sound in the videos ... They did it in a line graph, this is a full graphic view, figured I'd post it. When he first turns on the machine 0:30 ( http://www.liveinternet.ru/users/edward_lee/post235237573/play ) the frequency is higher, then at the dotted line the frequency shifts when he turns on the nanopulser.

At some point he switches on the light at the power output , but there is no detectable change so I'm not sure where that is.

verpies · « **Reply #33 on:** September 21, 2012, 07:46:41 AM »

Quote from: Vortex1 on September 21, 2012, 01:29:58 AM

Verpies: Thank you for the chart posted earlier. It should be carefully studied by anyone designing blocking oscillators or any switchmode converters.

Actually I have made this chart for the Orbo motor people.
In this motor a stationary coil is charged up with current, next a magnetic rotor pole passes by the coil mechanically and when it is far away, the current in the coil is discharged (energy recovered).

I was trying to show these people that it makes no sense to energize the coil longer than 0.575 Tau because after twice that time (1.15 Tau) needed for charging and discharging the coil, the energy dissipated in the resistance as heat is greater than the energy stored in the coil as magnetic field.

That is true about any energy recovery from a constant inductance coil.

verpies · « **Reply #34 on:** September 21, 2012, 08:12:49 AM »

@Itsu
I basically agree with the statements made by Vortex1 so I will not repeat them here.

I can add these points:
1) The coiled filament of a light bulb has inductance. For kHz loads it's better to use a bulb with straight filament (or a resistor),
2) The TL494 is inadequately bypassed. Solder several 0.1uF monolithic capacitors directly to the power supply pins of the TL494 using very short capacitor leads. An IC with a capacitor soldered from the top can still be plugged into the breadboard.
3) Measure your MOSFET gate waveforms at the two MOSFET pins (between gate and source) - not at the TL494 output pins.
4) Scope your drain current with an open secondary winding at first. You must see the current waveform similar to the one shown on this graph as i_L.
5) Keep your wires short and use plenty of low ESR capacitors for power supply bypassing, closely placed between the sources of your MOSFETs and your ground.
6) Take care what happens during the "dead time" when both MOSFETs are off. The inductor (primary winding) "does not like" to have its current interrupted and will defend against it by producing a high voltage to keep this current flowing in the same direction and at the same level. This creates a HV spike between the source and the drain of the MOSFET that is turning off (before the other MOSFET starts conducting). This spike is bad. You should minimize the "dead time" during which both of your MOSFETs are off and try to kill the spike with a zener diode or at least a 1kÎ© resistor.
7) Watch out for the conduction of the parasitic diodes inside your MOSFETs.

Your current waveforms are so wrong that I will not even attempt to analyze them at this stage.
Please read this.

itsu · « **Reply #35 on:** September 21, 2012, 10:51:08 AM »

Thanks Vortex1, thanks verpies

for your feedback, its much appreciated.

I will have to do some work/learning and try to incorporate your advices.

Regards Itsu.

Vortex1 · « **Reply #36 on:** September 21, 2012, 01:37:51 PM »

Page 26 and 27 of theTL494 data sheet/application note that verpies posted shows a single ended design example running at 20 kHz and requiring 140 uH of inductance.

Granted, this is not the same circuit configuration as a forward converter, but should give some idea of where you need to be with inductance.

verpies · « **Reply #37 on:** September 21, 2012, 03:13:43 PM »

Quote from: d3x0r on September 21, 2012, 07:22:26 AM

When he first turns on the machine 0:30 ( http://www.liveinternet.ru/users/edward_lee/post235237573/play ) the frequency is higher, then at the dotted line the frequency shifts when he turns on the nanopulser.

At some point he switches on the light at the power output , but there is no detectable change so I'm not sure where that is.

That is unusual because loading most types of pulsed inductive circuits increases their frequency since current in inductors rises quicker under load.

Hoppy · « **Reply #38 on:** September 21, 2012, 07:30:45 PM »

I've been away for a few days but will be finishing off the coil I started as close as possible to the Dally version. I'm fairly sure his 'green' transformer was a 50Hz mains type around 15VA, so this is how I will proceed with the build of the inverter. I already have a few home brewed transformer based inverters but I will try to keep as close as possible to his schematic. Between us, we should be able to discover if there is any unusual activity to be had from the two versions. It appears that Dally's coil winds are around half the length of the more sophisticated looking version.

Hoppy

Pinoy_Tech · « **Reply #39 on:** September 22, 2012, 06:01:26 AM »

Quote from: Hoppy on September 21, 2012, 07:30:45 PM

I'm fairly sure his 'green' transformer was a 50Hz mains type around 15VA, so this is how I will proceed with the build of the inverter.
Hoppy

Thatâ€™s also my doubt why I asked the used of an ordinary rectifier diode on that green transformerâ€™s output as well as the other rectifier connected to the output of them main transformer going to the 3 paralleled capacitors.

Hoppy · « **Reply #40 on:** September 23, 2012, 01:55:33 PM »

Can anyone please suggest an alternative or provide the specification for the Russian rectifier / diode K203A?

Hoppy

itsu · « **Reply #41 on:** September 23, 2012, 03:06:48 PM »

Quote from: Hoppy on September 23, 2012, 01:55:33 PM

Can anyone please suggest an alternative or provide the specification for the Russian rectifier / diode K203A?

Hoppy

Hi Hoppy,

user "Ð¡ÐµÑ€Ð³ÐµÐ¹ Ð’." wrote on 15 sept. in the other thread (TK):

Quote

For diode use Ð”Ð”Ð Ð’ diodes like ÐšÐ”203Ð, ÐšÐ”204, 2Ð”210Ð, 2Ð”210Ð‘, ÐšÐ”210A, ÐšÐ”210Ð‘, Ð”Ð› 132-50. Equivalent diode exist.

Some diodes which can be used:

Ð”Ñ€ÐµÐ¹Ñ„Ð¾Ð²Ñ‹ Ð´Ð¸Ð¾Ð´ Ñ Ñ€ÐµÐ·ÐºÐ¸Ð¼ Ð²Ð¾ÑÑÑ‚Ð°Ð½Ð¾Ð²Ð»ÐµÐ½Ð¸ÐµÐ¼ Ð·Ð°Ð¿Ð¸Ñ€Ð°ÑŽÑˆÐ¸Ñ… ÑÐ²Ð¾Ð¹ÑÑ‚Ð² Ð”Ð”Ð Ð’ - Drift Step Recovery Diodes DSRD

Ð”Ð¸Ð¾Ð´ Ñ Ð·Ð°Ð´ÐµÑ€Ð¶ÐºÐ¾Ð¹ Ð»Ð°Ð²Ð¸Ð½Ð½Ð¾Ð³Ð¾ Ð¿Ñ€Ð¾Ð±Ð¾Ñ Ð”Ð—Ð›ÐŸ Diode - Avalanche S diodes ASD

ÐšÐ”204Ð -> 400Ð’ 0.4Ð
ÐšÐ”226Ð” -> 800Ð’ 1.7Ð
ÐšÐ”230Ð“ -> 1000Ð’ 3.0Ð
ÐšÐ”220Ð“ -> 1000Ð’ 6.0Ð
Ð´Ð»112-16 -> 1500Ð’ 16Ð
Ð”Ð›132-50 -> 1500Ð’ 50Ð
Ð’2-320 -> 1200Ð’ 320Ð
Ð”Ð›123-320 -> 1200Ð’ 320Ð
Ð”133-400 -> 2400 400Ð
Ð”Ð§143-800 -> 1400Ð’ 800Ð
Ð”143-400 -> 2400Ð’ 800Ð

Hope that helps, regards Itsu

Hoppy · « **Reply #42 on:** September 23, 2012, 04:12:00 PM »

Quote from: itsu on September 23, 2012, 03:06:48 PM

Hi Hoppy,

user "Ð¡ÐµÑ€Ð³ÐµÐ¹ Ð’." wrote on 15 sept. in the other thread (TK):

Hope that helps, regards Itsu

Thanks Itsu.

Regards
Hoppy

d3x0r · « **Reply #43 on:** September 23, 2012, 08:14:38 PM »

was tracking down parts

[size=inherit]KD203A silicon diodes, diffusion. [/font][/size][/font][/color][size=inherit]designed to convert AC voltage at up to 5 kHz. [/size][/font][size=inherit]Available in-metal body with rigid leads. [/size][/font][size=inherit]type diode and circuit connecting the electrodes with the conclusions presented in the case. [/size][/font][size=inherit]Weight diode with accessories is not a '18 [size=inherit]Main technical characteristics of the diode KD203A: [/size][size=inherit]â€¢ Uobp max - Maximum Reverse Voltage: 420 V; [/size][size=inherit]Inp â€¢ Max - Maximum forward current: 10 A; [/size][size=inherit]â€¢ Fs - Operating frequency diode: 1 kHz; [/size][size=inherit]â€¢ Unp - DC Forward Voltage: less than 1 V at 10 A Inp ; [/size][size=inherit]â€¢ Iobp - Reverse Current: up to 1500 mA at 600 Uobp[/size][/size][/font][/color]
[size=inherit]
[/font][/size][/font][/color]
[size=inherit]Type diode

RectifierMaximum continuous reverse voltage,

420Maximum positive (for half-rectified) current, A

10Maximum positive (for half-rectified) current, A

10Mounting Method

in the holeMaximum recovery time, ms

-Maximum peak reverse voltage,

600The maximum allowable direct pulsed current, A

100Maximum reverse current, uA

1500Maximum forward voltage, V

1in Ipr., A

10Frequency, kHz

1Overall capacity Sd.pF

-Operating temperature, C

-60 ... 125Housing

kd11Manufacturer

[/size][/color][/font][/size][/font][/size][/font][/color]

verpies · « **Reply #44 on:** September 24, 2012, 12:08:50 PM »

Quote from: itsu on September 21, 2012, 10:51:08 AM

Thanks Vortex1, thanks verpies
for your feedback, its much appreciated.
I will have to do some work/learning and try to incorporate your advices.
Regards Itsu.

I would like to see your scopeshots of voltage between the ground and sources of your MOSFETs as well as the voltage on the power supply pins of the TL494 IC (measured from the same ground point).
Ideally the scope should show pure DC.

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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY (Read 11798596 times)

itsu

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