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Old 2nd April 2005, 03:39 PM   #1
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Default Rewinding Microwave Transformer

I have read of a couple of references to using transformer from old microwave oven, removing HV secondary, and rewinding with 12 AWG wire to create a high current transformer.

I have removed 2Kv secondary from a couple of microwave xformers but have not given rewinding a try yet.

Has anyone got experience going this?

I'm curious if results are reliable, issues while hum / vibrations in laminations, etc.

Cheers
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Old 2nd April 2005, 06:53 PM   #2
Variac is offline Variac  United States
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There are threads about this but I don't have them on hand. Intensive searching of this forum might work.
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Old 3rd April 2005, 04:21 AM   #3
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Click the image to open in full size.

This is what I have powering my induction heater experiment... about 100V 10A (since the secondary comes from a smaller MOT). I also have a bundle of 8AWG that gives about 9VCT, good for electrolysis after some schottky diodes (anyone for 12V at 50A?).

I would recommend making a bobbin out of stiff cardboard to wind on. Fit it loosely so it can be placed easily.

Tim
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Old 3rd April 2005, 09:24 AM   #4
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I've tried rewinding MOTs for amp use...somehow they seem to heat up alot...I've removed the shunts on the transformers as wel...hmmm
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Old 3rd April 2005, 12:23 PM   #5
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Yea,the shunts can be a problem..

http://www.users.qwest.net/~ptaylor/...MOTPSpage.html
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Old 3rd April 2005, 04:06 PM   #6
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Quote:
Originally posted by DigitalJunkie
Yea,the shunts can be a problem..

http://www.users.qwest.net/~ptaylor/...MOTPSpage.html

This was extactly info I was looking for.

Thanks!
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