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Re: [Amps] HV transformers I want to seriesprimaryandparallelsecondary

To: <dhallam@rapidsys.com>, <amps@contesting.com>
Subject: Re: [Amps] HV transformers I want to seriesprimaryandparallelsecondary
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Sat, 19 Aug 2006 05:20:41 -0400
List-post: <mailto:amps@contesting.com>
My example was wrong,.

> has a little more voltage at the same current, but not 
> much.
> We've added about 2.5 watts maximum  heat to each
> transformer that would normally be dissipating about 5 
> watts
> at full load.

That should have been "added about 1.25 watts maxmum heat to 
each transformer", not 2.5 watts.

> You can see in this case the error between transformers,
> even in the case of very stiff transformers, has to be
> pretty large to add significant heat. In this case a ~5%
> open circuit voltage error produced an additional 50% 
> heat.

That should have been about  25% more heat added from a 5% 
voltage error in this example.

73 Tom 


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