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Author Topic: 5 Watts in 60 Watts out ...  (Read 14031 times)

DeepCut

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Re: 5 Watts in 60 Watts out ...
« Reply #15 on: November 09, 2010, 09:59:10 PM »
OK not self-running with the cap.

It's a 450 Volt cap but didn't get charged beyond 200 Volts or so, does this mean something i don't recognise ?

Will now do video of load test, i won't speak during it coz my GF is watching crappy TV ;+}


Gary.

DeepCut

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Re: 5 Watts in 60 Watts out ...
« Reply #16 on: November 09, 2010, 10:45:07 PM »
I made a noob mistake ! Maybe coz i'm a noob ;+}

My resistor wasn'tt 66 Ohms, the meter said 66 while set at the 2000k mark, so god knows what it is.

The closest i've got is a 100 Ohms and it won't even start with that.

I read that generators shouldn't have a load attached until they are at full speed, so i ran it up to full speed then connected a bulb that is meant to run from the mains supply.

It lit it and the magnet still ran.

I'm gonna call it a night for now and get the proper resistors tomorrow.

Thanks for the help :)


Gary.

penno64

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Re: 5 Watts in 60 Watts out ...
« Reply #17 on: November 09, 2010, 10:57:02 PM »
Gaz,

Good work.

You could if you wanted, measure the resistance of the globe.

But please note that as the filament heats, it ohmic resistance changes.

At least it will give you a rough idea.

Penno

spinn_MP

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Re: 5 Watts in 60 Watts out ...
« Reply #18 on: November 09, 2010, 11:19:52 PM »
5W in, and 60 out?

Where can I get one of this?

DeepCut

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Re: 5 Watts in 60 Watts out ...
« Reply #19 on: November 10, 2010, 08:30:26 AM »
You don't 'get' one you read the thread i mentioned at the beginning of this thread and do your own replication :)

void109

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Re: 5 Watts in 60 Watts out ...
« Reply #20 on: November 10, 2010, 06:42:26 PM »
At 2000k (mine only has 200k, then 2M, then 20M), but that should make your reading of 66 imply 66K ohms resistance.  With the 135 volts measured across it, that yields 2mA of current, and 27.6mW of power.

Sounds like the 100 ohm resistor was just too much to run as well.

(is your resistor color coded?)

DeepCut

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Re: 5 Watts in 60 Watts out ...
« Reply #21 on: November 10, 2010, 06:48:38 PM »
Ye it's colour coded, i have a chart somewhere.

Today it wouldn't even start with the cap across it but it would start without the cap then keep going with the cap attache once it was running !

I hate when the same system behaves inconsistently ...

Low-Q

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Re: Proper load-test ...
« Reply #22 on: November 14, 2010, 03:54:37 PM »
Thanks void.

OK i've done a proper load test.

My input resistance is 18 volts / 0.28 amps = 64 Ohms.

I put the nearest i had, 66 Ohms, across the rectifier output.

Results :

OUTPUT VOLTAGE : 138 Volts DC

OUTPUT CURRENT : 0.3994845360824742 (Calculated).

OUTPUT POWER : 55 Watts.

I remember mscoffman talking about the AC impedance of the output coil having an effect on this so i will now try to get the thing to self-run.

Looking good though ...


Gary.
Is this RMS readings, or just peak readings?

Vidar

DeepCut

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Re: 5 Watts in 60 Watts out ...
« Reply #23 on: November 14, 2010, 04:38:10 PM »
Hi Vidar, i made mistakes, as usual !

I've finally done it properly and my output is :

200 VAC @ 0.003 Amps = 0.6 Watts ...

LOL @ me !

You should check out Tom's thread, he is far more advanced in this and looks to be doing well :

http://www.overunity.com/index.php?topic=9076.0


Gary.