Bucking Coil Inverter

[rosehillworks]

Skywatcher
30 again should be fine.
http://jnaudin.free.fr/html/afeptstr.htm


Here is a sketch of what I was thinking.


1420918889251.jpg

[SkyWatcher]

Hi rosehill, I am studying your information a bit and will be trying some things soon.
Though for the moment, i decided to try one more led bulb in parallel, total of 4 and the efficiency increased further.
Each bulb according to the sensor is now outputting around 29 percent of full brightness.
This works out to 522 lumens at 2.25 input watts for 232 lumens per watt.
Keep in mind, these led bulbs are rated at 75 lumens per watt when plugged into the wall.
So this setup is 3 times more efficient at outputting usable light, well so far, i do have one more bulb on hand i could add.
peace love light

[interdesign21]

hello all
I made a replication as close as I could.

Core: 5 ferrite beads
secondary: each 174 turns / 26 AWG / total 348 turns
Primary: bifilar 48 turns x2 / 22 AWG
power supply fixed at 3.5 V DC
Resistor: 1K variable / graduated at 640 ohm
Transistor: 2N3055
Load: LED lamp 220-240 V / 7W / 50-60Hz

Best apparent luminosity - input ratio: 0.3 Amp / frequency unknown

The camera do not show the real amount of light emitted by the lamp.
Compared with normal input from grid it is quite dim.
Anyway much fun, will try variations

Thanks Sky Watcher

[SkyWatcher]

Hi interdesign, thanks for sharing.
Did you wind the secondaries in opposite directions?
Are you observing reduction of input when loaded with bulb? which is the reason it is setup this way, thanks.
peace love light

[interdesign21]

Hi Sky
My setup indeed has the secondary winded in Bucking mode. same as you show in your posts. The primary winded over one of the paired secondary. same schematic as yours, except the resistor is variable 1K. (and the led lamp 7W 220V)
There is a sweet spot playing with resistance were the input amps decrease, and the light
increases. (I guess related to the particular number of turns in windings)

[B]Sorry I forgot to mention this most significant aspect, YES there is a slight reduction in input amperage when loaded. (my PS is regulated at 3,5 volts).[/B]

I also made another setup with a flyback ferrite core (as suggested by you):

secondary:440 turns each paired coils/ AWG 31
primary: 110 turns bifilar (220T) AWG 26 /winded over one of the paired sec.
Unloaded: 0,15 A
Loaded: 0,1 A
I dont have an oscope, so no way to see wave, freq, nor output real specs.

This is the first time I find such a behavior in a secondary.

I´ll think to apply this in other setups, I cannot explain it with the accepted rules.
May be some expert reading here, will be kind to provide a logical explanation.

Thanks
Alvaro

[interdesign21]

hello
must add another quick test result (with same flyback setup)
from secondary out to a bridge rectifier to a 470uF-350V electrolytic cap shorted with a 100 ohm/3W resistor:
input jumps from 0.1 A to 0.2 A (volts out between resistor leads, 0.9 V)

IMHO the type of load is determinant.
cheers
Alvaro

[SkyWatcher]

Hi interdesign, thanks for sharing your results.
Yes, i have found it likes a certain type of load.
I think using the right load, each secondary coil is self oscillating between the other secondary coil.
This self oscillation is mentioned in the pdf by chris sykes also.
And i'm not speaking of the bifilar oscillator, the secondaries themselves, start to oscillate back and forth between each other.
This can be seen in the led bulbs.
When that oscillation becomes too slow, literally, when using 2 led bulbs, each one turns on and off, one on then off, then other on and off, etc. in perfect timing, like a car turn signal.
Though with proper setup, the oscillation cannot be seen.
This might be why a certain loads draws more amps, it's killing that back and forth oscillation.
peace love light

[Gav]

Hi Sky
the battery I recharged sat at 3.67v after resting, when I used it the voltage dropped right down so there was no real charge
I also found that my coil puts out a wireless energy field, might be because I have the secondary on top of the primary, so there would be a lot of loss. I will make another and buy an led bulb

[SkyWatcher]

Hi gav, if you are trying to charge a higher voltage battery with a lower voltage one, that is difficult without a capacitor dump.
Batteries need the right mix of voltage and current to charge and power under load.
Well, i tried another ferrite bead oscillator i had with a regular single wound secondary, was using it previously to light gutted cfl's.
It also exhibits lowered amp draw when led bulbs are attached to secondary as load, so not sure what to think, though i will give it some thought.
peace love light

[SkyWatcher]

Hi folks, well i decided to see how a regular single secondary compares to the separate bucking coils.
I used 24awg. magnet wire for the one layer secondary and 24awg. for the primary bifilar.
I achieved similar efficiency in the 3 volt range.
When using 11 volt input range, efficiency increased, 225 lumens per watt at 1.8 watt input using 3 led bulbs in parallel.
Will be testing to try and increase efficiency further, maybe higher voltage input will give even better results and more bulbs.
peace love light

[boguslaw]

Skywatcher

The idea behind bucking coils is that you can put any load or even short the output and it will still consume the same amount of current in primary side. I doesn't mean it could power whatever you wish on secondary side

[SkyWatcher]

Hi boguslaw, thanks for sharing the information.
Though with my setup, if the bucking secondaries are shorted, the current increases greatly.
I did wind a 1-1/4" ferrite toroid with bucking coils and bifilar, and the coils are inline, meaning none on top of another.
So maybe a little more testing with the toroid inline version may show no increase when shorted, we'll see.
peace love light

[Wistiti]

Hi Sky and everyone!
Maybe we could have some help here: Partnered Output Coils - Free Energy
Ciao!

[SkyWatcher]

Hi wist, thanks for link, until i have something a little more conclusive, i will just post here my tests.
I am going to wind another ferrite bead core, this time i will use 24awg. magnet wire for partnered secondary coils, then again 24awg. magnet wire on top for bifilar oscillator or also try some door bell wire later for loose coupling.
This will be a lower ratio, closer to the 1 to 3 winding ratio.
I will attempt to verify the lack of stepped down current, when the voltage is stepped up, as chris says this should happen.
peace love light

[SkyWatcher]

Hi voltan, thanks for sharing the circuits and information.
I'm studying them.
Have you built any of these or anything similar to the bucking coil idea, as chris sykes is showing.
Would love to hear about any results from anyone.
Still making experiments, I'm not sure the blocking oscillator is the right way to run this setup, maybe it needs the simple inverter style circuit, for more sine wave than square wave.
peace love light