Posts Tagged with Transformer noise and vibration control

Transformer Noise (Hum) Reduction by Air Isolation

Transformers installed indoors transmit vibrations to the surrounding areas, resulting in an unpleasant tonal noise commonly known as ‘transformer hum’. In addition to structure-borne noise, transformers generate airborne noise (noise emitted through air), albeit to a lesser degree. Given that structure-borne noise is the primary mechanism of noise transmission in a transformer, it is essential […]

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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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