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#1
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I have built a 48 volt power supply that seems to work ok but it hums and vibrates a lot when I install an enclosure I have let it run for a couple of hours and everything seems ok (microwave transformer rewound with #14 magnet wire) Is there a way to controll this humming an vibration? (leaving the cover off helps but this holds the cooling fan) thanks, Randy |
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#3
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| Is the cover made out of steel or aluminum? If steel, the transformer could have a strong enough magnetic field to cause the cover to resonate at 60 hz. Also could be a loose lamination in the core causing noise and the cover amplifies it. |
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#4
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| If it is a square laminated transformer, they usually are dipped and baked in shellac. Another way, if you have a MIG welder is to run a narrow bead across the laminations on either side, this is also a common practice by some manufacturers. Al
__________________ CNC, Mechatronics Integration and Machine Design. “Logic will get you from A to B. Imagination will take you everywhere.” Albert E. |
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