Confirmation of OU devices and claims

[itsu]

Running the big coil without any probes attached and tuned for max. (180KHz) when the gate driver is at 9V.
I get 160ma input at this 9V, so we have an input power of 1.4W into the gate driver.


Adding a RX or satellite coil (DC out into a 3W led) detunes the big coil but after retuning we loose 40ma
due to lower Q, i guess, and thus lower voltage across L and C.
Input now 9V @ 120mA = 1.08W.

Measuring this satellite coil shows we have 2.7v @ 52mA = 140mW into the led.

Adding another satellite coil shows the initial satellite coil looses 10mA.

It looks like the same thing is happening as with the earlier tested smaller TX coil.
The more satellite coils to be added, the less power is left to be divided among them.

I will try to continue to test with all 5 or 6 satellite coils to get this confirmed.


I also tried to put 2 satellite coils in line, one behind another, but i did not notice any retransmitting effect.


Video here: https://www.youtube.com/watch?v=rFf3v13t-9I&feature=youtu.be

Itsu

[tomd]

http://www.spigellab.com/2016/07/12/basic-teslas-experiments-part-4-measuring-power-consumption-300w-motor-and-wireless-power/

[Vortex1]

http://www.spigellab.com/2016/07/12/basic-teslas-experiments-part-4-measuring-power-consumption-300w-motor-and-wireless-power/

Itsu does much  better than this video by actually measuring input power consumed as well as output power delivered to the load. The presenter in the video never shows input power calculations.

The presenter should not even have mentioned 300 Watt motor as it is not consuming 300 Watts as it is essentially unloaded. Rather it is consuming 69 Watts or less depending on distance between Tx/Rx. (distance lowers capacitance coupling)

As far as wireless power, the power is transmitted via the large capacitance formed by the tin plates on the high tension nodes  and the return path is using ground wires. It will not work efficiently without the ground wires to complete the capacitively coupled circuit, so it is not a truly wireless transmitter / receiver pair.

Just because the capacitance between the nodes is invisible to the eye does not mean that it is not there completing the circuit.

If you remove the tin foil plates and replace them with a high voltage capacitor of equivalent pF connecting the two high tension nodes, would you still call the system "wireless" ?

An air core transformer setup such as Itsu has demonstrated is closer to the definition of a "wireless" power transfer system.

In more general terms any transformer (even 60Hz iron cored types) reasonably  isolated from primary to secondary and not requiring grounds or relying on capacitance coupling is much closer to the definition of a truly "wireless" power transfer system.

FWIW
Regards

[itsu]

Thanks Tomd,    looks similar as what we are doing here.



To be more specific on my used leds and to show how easy it is to be deceived by leds, here i made a graph
showing my used 3V/3W led in a black box fed with DC voltage and measured by a small photocell.

The above reported 140mW will light up such a led to about 2/3th of its max. allowable light strength.
Meaning at about 5% of its max input it will already produce 66% of its output.

So if someone says he uses 3 or 4 or 5W leds at considerable light, this by no means mean that they use 3 or 4 or 5Watt.

Itsu

[itsu]

As promised earlier, i tested with 5 satellite coils around the big coil.

I tuned again the big coil for max resonance at 180KHz (9v @ 110mA = 0.99W input).
The 5 satellite coils leds are on again rather brightly.
But the one still measured for voltage and current now shows 2.63V @ 23mA for 60mW power.

When we roughly take this 60mW times 5 we get 300mW total consumed by the leds which is about 1/3 of the
power available at the input (COP = 0.3).

So we went from:
1 coil running at 2.7V @ 52mA = 140mW to
5 coils each running at 2.6V @ 23mA = 60mW (300mW total).

60mW on the graph shows still about half the max. brightness of such a led.

video here: https://www.youtube.com/watch?v=mmx2HMYI95E 

Itsu