Low Voltage Transformer Buzz


Old 09-29-07, 01:10 AM
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Low Voltage Transformer Buzz

I installed my transformer today and I plugged it in and it buzzed pretty loadly. I was just testing the system and had only 1 light hooked up to it. What could be causing the buzzing and how can I get it to stop.
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Old 09-29-07, 06:04 AM
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Hysteresis in a cheap transformer maybe? http://en.wikipedia.org/wiki/Transformer
Magnetostriction Magnetic flux in a ferromagnetic material, such as the core, causes it to physically expand and contract slightly with each cycle of the magnetic field, an effect known as magnetostriction. This produces the buzzing sound commonly associated with transformers,[6] and in turn causes losses due to frictional heating in susceptible cores.
Old 09-29-07, 07:04 AM
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almost every trransformer vibrates. The solution is, basically, isolate the transformer from the surface that is amplifying the vibrations.

If the transformer is mounted tightly, especially to sheet metal, it will amplify the sound.

rubber insulators are often all that is needed to remove the hum.

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