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upthecreek
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Joined: 15/10/2007
Location: Australia
Posts: 2

Posted: 09:29am 15 Oct 2007

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Hi all.

I was reading somewhere that you can spin a standard (before rewire) F & P by hand (thus indicating at slow revs) and get about 100 volts or better from the unit. Can anyone provide test figures or confirm this please? I am going to run the voltage higher across my property since it then requires smaller cables and then at the end, bring it back to a usable voltage. Well thats my theory anyway....

Idea and info appreciatedEdited by upthecreek 2007-10-16

Check out www.secs.net.au

Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5116

Posted: 11:46am 15 Oct 2007

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From memory, I think a standard 80 series will reach 12volts at 30 RPM, so at 100 RPM you could expect around 40 volts. A 60 series would be closer to 60 volts.
But take these figures with a grain of salt, was a long time ago I took the readings and I should have recorded them.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

carl1
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Joined: 16/04/2007
Location: Australia
Posts: 79

Posted: 12:43pm 15 Oct 2007

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Hello

I have measured 80S @1200rpm 580volt between phases and 330Volt phase to center.

Cheers Harald

GWatPE

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Joined: 01/09/2006
Location: Australia
Posts: 2127

Posted: 12:49pm 15 Oct 2007

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the info you need is at

http://www.ecoinnovation.co.nz/pdf/smartdrive_what_is_it.pdf [page 8].

from the graphs on p 14, the intersection of the 0 power output of each of the graphs is the open cct voltage of each winding at that rpm on the x axis.

linearly extrapolate down to the rpm to that you wish to operate at and this will give the open cct voltage.

Gordon.

become more energy aware

Gill

Senior Member

Joined: 11/11/2006
Location: Australia
Posts: 669

Posted: 02:36pm 15 Oct 2007

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G'day upthecreek,
Yes that sounds about right.
GWatPE has put you on to a site that sells a high voltage version of the F&P for long cable runs. Though not normally recommended for back-yarders like me, it seems that you may have electrical trade resources to handle the high voltages. Because of the high frequency of the AC generated it is normal to use toroidal transformers or switch mode power supplies to drop the voltage for battery charging.
As indicated, lots of beginners data on the site Gordon gave you.

Here is their home pageEdited by Gill 2007-10-17

was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ

upthecreek
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Joined: 15/10/2007
Location: Australia
Posts: 2

Posted: 09:08pm 15 Oct 2007

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Thanks all.

I have written and visited the site above and am awaiting some return info. Its exactly what I need. Will tell you how I get on.

Check out www.secs.net.au

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