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/diy/ Do-It-Yourself

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Anonymous 2014-10-15 01:58:34 No.711091

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Hey /diy/ i need help. I have a rewound microwave oven transformer and a rectifier + capacitor circuit to create 45v DC. Usually the power supply runs fine as the 45v DC end has a sufficient load. When i try to run my electromagnet however, that does not have sufficient resistance, the secondary windings heat up. My first thought was to use a potentiometer to limit current on the 110vac side, but i have no idea what kind of potentiometer to buy. What kind of potentiometer would be sufficient for potentialy almost shorted wall current?


>>
Anonymous 2014-10-15 02:02:32 No.711093
>heats up with no or 'insufficient' load
That makes no sense at all.
Sounds like maybe you screwed up the transformer somehow, has an internal short or something else wierd.

>>
Anonymous 2014-10-15 02:04:14 No.711094
>>711093
that must have been a typo, i meant that when i attach a component with low resistance to the 45vdc end, the secondary windings heat up







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