Hello Bill and Group,
Now, I get to learn something. This is really great. I understand the
concept, but not the implementation of a current limited transformer, and
remember reading about it when I built a neon sign transformer-based Tesla
Coil..decades ago. My neon transformer is rated at 12KV,30ma, and I
remember that it simply stops arcing when the arc gap or jacobs ladder
shorted out...No fireworks...Thankfully I passed that Darwinian natural
selection opportunity...
How would I spot a magnetic shunt, in the core of a transformer, as in the
microwave application? What would I look for?
Pat
aa6eg@hotmail.com
>From: Bill Fuqua <wlfuqu00@uky.edu>
>To: RFlabnotes@aol.com, 2@vc.net
>CC: amps@contesting.com
>Subject: Re: [Amps] Silly idea?
To: <amps@contesting.com>
>Date: Tue, 18 Mar 2003 10:53:03 -0500
>
>A current limiting transformer is the type used in your microwave oven. It
>has magnetic shunts between the primary and secondary such that if the
>secondary current exceeds a limit the flux is diverted back to the primary.
>These shunts sometimes are easily removed (if they have not been welded in
>place) so that the transformer can be used as a normal transformer. I have
>not seen them used for filament service but I see no reason why they would
>not work.
>
>73
>Bill wa4lav
>
>At 10:00 AM 3/18/2003 -0500, RFlabnotes@aol.com wrote:
>>Rich:
>> This is meant not as a challenge to your answer, but as a request
>>for
>>more info . What is a current-limiting transformer design? Making it
>>higher R
>>would certainly do the job, but then the normal operating loss would be
>>kind
>>of high. So, where is the magic dust?
>>
>>Eric K8LV
>>_______________________________________________
>>Amps mailing list
>>Amps@contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps
>
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