Transformer Noise

[ShadyYehia]

Hi There :
Actually I've a Problem into knewing the reason of mading transformer made low noise espicially when a speciall load ( Electrical Heater ) is operated connected to its secondrey

 

[SolderingGunslinger]

I would guess the resistive load of the electric heater is sufficient to cause the transformer to humm.

There are several reasons that a transformer will humm,

1) loose laminations in the core

2) loose windings or winding bobbins

3) it likes the tune but never learned the words to "It's too darned hot".

--SGS

 

[dpc]

Transformers will always make some noise due to slight deformation of the core by the magnetic field. Do a Google search on "magnetostriction".

http://www.answers.com/topic/magnetostriction

 

[sreid]

I remember my shock when I came across an electrical engineering drawing for wood transformer wedges. Some electronic stuff is low tech. Like Tie Wraps.