3 ms·
Most big-ass transformers also produce an audible hum, meaning something is moving enough to push air around.
by B1FF_PSUVM 11y ago
Most big-ass transformers also produce an audible hum, meaning something is moving enough to push air around.
- jacquesm 11y agoThat's a combination of those same gaps and gaps in the transformer laminations where the laminates don't line up perfectly around the edges (they flutter ever so slightly) and inside the stack if a sheet isn't pressed perfectly flat or the lacquer isn't applied evenly.
- brandmeyer 11y agoAlso, air-cooled transformer windings are installed such that there are deliberate air gaps between each coil layer. Spacers are inserted in between the gaps for some structural rigidity, but there is enough remaining flexibility to vibrate.