Why does a dimmer or transformer buzz when being dimmed?

By |2017-07-17T10:02:02+01:00July 17th, 2017|Categories: |

Only a leading edge dimmer causes a buzz in transformers and in itself. When a transformer is operated on a normal non-dimmed AC cycle, it is quiet because it turns on “softly” when the AC starts off from zero volts. On leading edge dimming the transformer experiences a sudden electrical and mechanical “shock” when it [...]