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Subject: Re: Transformers

Date: 09/27/00 at 10:10 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: Transformers posted by JOE KEOGH on 09/26/00 at 9:28 AM:

Hello, Joe.

There are several possiblities.

You could use a low voltage transformer such as a 6.3 volt filament transformer to drive input to one of the toroidal transformer's windings and measre the outputs at the other windings. Drive this 6.3 VAC input in turn, into each and every one of the windings and measure the voltage ratios you obtain.

Next, choose a winding which might be a 115 VAC input and feed it with a variable autotransformer while monitoring the AC input current. If the current rise seems to follow the voltage rise linearly, fine. If however, the current starts to climb rapidly, you'll have reached core saturation, a situation you'll want to back away from!

Once you find a winding which accepts the 115 VAC gracefully, you'll be able to measure the actual output voltages of the other windings.

To get a feel for power capability, weigh and measure your transformer and compare those results to weight and dimensions of transformers in vendor's catalogs.

Good luck.

John Dunn - President
Ambertec, Inc.

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