Zero crossing

Thread Starter

alphacat

Joined Jun 6, 2009
186
I was looking for articles/Information about the effect of unplugging/turning off an apliance without using Zero-crossing, but since i'm new to it, i'm not familiar with related terms. (i'm not sure if EMI or EMC have something to do with it).

Could you please refer me to text and perhaps tell me the related terms?

Thanks.
 

hardsoft

Joined Sep 7, 2009
13
I won't worry about unplugging. I think it would be almost impossible for a human to perfectly time an unplugging of a device at zero crossing even if they wanted to.

Usually zero crossing is used for things like ovens when heat is pulsed into a heating element. The element will be turned on and off at the zero crossing to prevent EMI problems.

Here is a good ap-note by Microchip on designing a low cost range that discussing zero-crossing switching.
http://ww1.microchip.com/downloads/en/AppNotes/00958A.pdf
 
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