Bob Boyce TPU thread

[eldarion]

@all

I don't know if you guys realize how frustrating it is for me to try to read threads here when my browser locks up every time I try to load a page here in any thread that has a lot of image file data to load. It doesn't seem to matter if it is just a few large images, or a lot of small ones. Last night I tried to open the Eldarion thread at least 2 dozen times, and every time it locked up my browser. One time, it at least displayed the messages before it froze, so I was finally able to read the newer posts there.

@Eldarion

I don't know how you concluded that the pulse width of the PWM3 series is 11000 ns, although it is adjustable up to that, and more. I put some scope shots up of a PWM3F on the hydroxy group photos section, and the pulse widths were shown to be under 5000 ns at the outputs.

The energy application of the toroid is similar to the hydroxy application, but it is not exactly the same. Your resistor and scope are not going to behave the same as a hydroxy gas cell stack. In a hydroxy gas application, the energy flows from the secondary and through the cell stack to the ground reference. But whatever your load, a choke (or possibly a high value resistor, have not tried that) is required between the secondary and the HV DC power supply. Having the capacitor in the power supply is ok, IF you HF isolate that supply. With the connections as you are showing, the majority of the flow of energy is going to take the path to ground reference, through your power supply! Note here that ground reference means any mass that has a potential that is or can be referenced to earth ground, so it does not have to be grounded directly in order to soak up power.

I have to take wifey to a dr appt so I have to leave now. i hope this has helped.

Bob

Hi Bob,

Thanks for the information!  I will pick up a high value choke and try isolating the supply again.

Have you tried the FireFox browser (http://www.mozilla.com/en-US/firefox/)?  It is about 6 megabytes to download (free, of course ), and it is much more stable than Internet Explorer.

Regarding the PWM3E pulse width, I had calculated that via the formula 1.1*R*C, which should be valid for the 556 monstable pulse shaper.   With an R of 1k (the minimum) and a C of 0.01uF, I get 11us (11000ns).  It is possible that the optocoupler might be cutting that value in half due to rise/fall time, as I could not find a datasheet for that chip.

Still, 5000ns makes more sense to me than 500ns!

Thanks,

Eldarion

[Bob Boyce]

Hi Bob,

Thanks for the information!  I will pick up a high value choke and try isolating the supply again.

Have you tried the FireFox browser (http://www.mozilla.com/en-US/firefox/)?  It is about 6 megabytes to download (free, of course ), and it is much more stable than Internet Explorer.

Regarding the PWM3E pulse width, I had calculated that via the formula 1.1*R*C, which should be valid for the 556 monstable pulse shaper.   With an R of 1k (the minimum) and a C of 0.01uF, I get 11us (11000ns).  It is possible that the optocoupler might be cutting that value in half due to rise/fall time, as I could not find a datasheet for that chip.

Still, 5000ns makes more sense to me than 500ns!

Thanks,

Eldarion

It must be related to my dialup connection speed at home. Right now I am on a broadband WiFi connection and everything loads perfectly! Yes, tried FireFox at a neighbors and hated every minute of it. It was no faster than IE on dialup, and I didn't care for the interface.

Now I understand where you got the 11000 ns figure. I use that digital optocoupler as a DSP  waveform shaper / filter to clean up the horrible 555 outputs. I can adjust those outputs so narrow that the outputs FETs don't even have time to turn on ;-)

I use the secondary of a big heavy battery charger transformer as a choke in series with the 160 VDC line. All caps are on the power supply side of the choke, none on the toroidal side (except for the DC blocking cap of course).

You do know you are not limited to the 42.8 Khz primary, 21.4 Khz secondary, and 10.7 Khz tertiary frequencies don't you? More power is available at higgher frequency. I just used those because the primary 42.8 Khz is in the region where water responds to the LEM. Please remember that the PWM3 hydroxy core parameters are not going to be exactly the same as the energy core parameters.

Bob

[Bob Boyce]

Might be worth looking into these. They may be fast enough to use for energy conversion.

http://www.fairchildsemi.com/pf/RH/RHRD660S.html

Bob

[MarkSnoswell]

Might be worth looking into these. They may be fast enough to use for energy conversion.

http://www.fairchildsemi.com/pf/RH/RHRD660S.html

Bob

They look very good -- the best I can find outside expensive SiC Shottky diodes (http://www.cree.com/products/power_docs2.asp).

I have added them to the Parts, Materials and data page here http://www.overunity.com/index.php/topic,3544.new.html#new

Mark.

[Bob Boyce]

They look very good -- the best I can find outside expensive SiC Shottky diodes (http://www.cree.com/products/power_docs2.asp).

I have added them to the Parts, Materials and data page here http://www.overunity.com/index.php/topic,3544.new.html#new

Mark.

I ordered some of those as samples from Cree, and also bought some of the RHRD660S with my latest parts order.

I sent some germanium devices to Rich for him to test in power conversion and verify my findings. He tested a low powered gremanium transistor that he already had first, and the results were as expected. Used as a rectifier diode, the germanium transistor converted enough of the LEM to TEM, that it was readable as DC on a regular analog meter. He said with that particular transistor, it was the base/emitter junction that worked best..Conversion efficiency will depend greatly on the doping of the actual devices used, so this is going to take a lot of testing to nail down which germanium devices work best, and which junctions (base/emitter or base/collector) work better on those devices. Hopefully we can eventually identify which doping in germanium is required for maximum power conversion. I will be testing these hyperfast silicon devices as well.

Bob