Posts Tagged with Transformer noise and vibration control

Structure-borne Transformer Noise Reduction by Air Isolation

Transformer noise (hum) is caused by the extension and contraction of the core laminations when magnetized (a phenomenon is known as magnetostriction). This extension and contraction (vibration) take place twice during a normal voltage or current cycle. That is, the transformer vibrates mainly at twice the frequency of the supply, i.e. 120 Hz in North […]

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