Allan's Transformer as a Generator

[Jeg]

Hi Allan
Thanks a lot for your detailed explanations and thought sharing.

So it is clear that iron cores need very little power to establish the magnetic link. Also i keep in mind that needs some time for this action to happen in an iron core. Time that becomes far less when we use ferrite cores. But what about air cores? I wonder, can this principle be applied when air is used as a core? Saturation would not be a problem anymore and looks like switching the flux would take even less time and power.

Thanks in advance
Jeg

[AllanV]

Hi Allan
Thanks a lot for your detailed explanations and thought sharing.

So it is clear that iron cores need very little power to establish the magnetic link. Also i keep in mind that needs some time for this action to happen in an iron core. Time that becomes far less when we use ferrite cores. But what about air cores? I wonder, can this principle be applied when air is used as a core? Saturation would not be a problem anymore and looks like switching the flux would take even less time and power.

Thanks in advance
Jeg

Hi Jeg,

The iron core does limit the frequency therefore time is a factor. But in general it is not the time but the rate of flux increase without some control that is the problem. Iron contains the field and links the currents strongly. Generally heat determines size and output, but if a greater field, then less core area and turns, helps dramatically.
It is possible to get flux in the core as quickly as it is expelled. Iron is not a problem at all for household use.

The technique previously described is the only way known to get FE from coils.

Whether iron, ferrite, or air, the only difference would be size and the maximum frequency and the cost of controlling with high speed switching.

A practical low cost device for daily use is the aim. Charging batteries and buying an inverter is an option. My power cost is $400per year
and it is small compared with the cost of building and maintaining my own power system.

Large diameter solid copper conductors can produce power and a lot of current if a magnetic field is applied directly on and around the conductor in the correct manner.

The main focus should be all the devices that need high inrush currents and over the top power consumption.

EV's are ridiculous. One horse, low speed high torque, would do a lot at one time but now we drive around cracking the whip on 100 horses at least.

All the best,

Allan

[Thaelin]

  Must these transformers be the standard E core type or can torrids be used? I have a couple of them with 40v dual secondaries but it is only center tapped.
thay

[AllanV]

  Must these transformers be the standard E core type or can torrids be used? I have a couple of them with 40v dual secondaries but it is only center tapped.
thay

Hi,

It was found that a gap is best on one of the transformers, this would be the way to reduce the residual magnetism for the resonant input circuit.

Toroidal transformers are not able to be used on the main gapped transformer of course but it would work with the other current controlling transformer. The tapping would have to be separated to make individual windings. The number of turns would have to be worked out and then another two windings of heavier wire with 15% less (32-34volts) on each wound onto it. These would then be for the power circuits.
The usual input high voltage winding would not be used at all because no useful power would be developed on it.

It is all about generating in the link between input and output and it is very small.

There would need to be a bit of experimenting if mains voltage output and frequency is required.

E core Laminations and formers plus extras are able to been purchased and this is convenient but E core transformers can be pulled apart carefully.
Many large transformers can been collected from redundant scrap and are as new more often than not.

The smaller driving transformer does not have a gap. It is more to dampen the current into the low ohms of the larger transformer with the gap.

Even a modest number of turns can produce 400 volts at 100pulses /sec frequency. There is a tendency to over do it.

On the bench now is a 134mm (7in) across the top reduced down to 50mm x 50mm core area, 1mm gap in the magnetic circuit, transformer. It has two 300 turn 1.5mm windings with two 30 turn 1.5mm windings that add to make 330 on the input and output.

It will be tried and it may be that it can be cut down to reduce the flux path and also reduce the turns.

The other transformer is 115mm (4.5in) across the top with a core area of 38mm x 45mm length 52mm no gap.

Four windings two 1.5mm  45 turns, two 0.8 56 turns, these control the current in I/P O/P circuits. These windings complete the circuit through the transformer with the gap. It may allow alternate positive negative pulses to drive it, but otherwise DC will be switched into the different 15% variation of the windings.

The aim is 2Kw. It will take a few more days work.

Allan


 

[leonelogb]

Hi Alan,
I have gotten part of the stuff I need for the project, check the pic, I have also added the diagram of how I plan to do it, please review it and let me know if I have to modify something else.

For that core I bought 1.5 mm wire, I'm waiting for it to arrive this week and after your confirmation then I'll start.
Since this core is not very big, it is only to start this as a mini project. (as you can see), Then after that the Big one God willing.