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The Norfolk Broads Forum / Geeks Korner / Inverters, transformers and frequency
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Posted By Discussion Topic: Inverters, transformers and frequency

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woodwose
Jul-01-2008 @ 9:32 AM                           Permalink
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Inverters supply 240V AC 50Hz

Many cheap inverters supply a "modified sine wave". In other words a square wave output. This can cause problems with some equipment, but it should not be a problem where a transformer is used unless the windings are really on the edge.

I suspect the transformer in your razor was a bit cheap and nasty and just gave up the ghost.

Nigel

Gordon
Jul-01-2008 @ 11:47 AM                           Permalink
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Thanks for that Nigel, this has aroused my curiosity, I think I need to bring the thing home and just see what that waveform looks like, I could imagine that it would need to be fairly sinusoidal or run at a lower peak voltage to compensate for being at peak for longer during the cycle. Anyway you have answered the frequency bit, I think I was confused by inverters that I have found in equipment that run at a high frequency for greater efficiency and smaller transformers. I believe aircraft used 400Hz for that reason

Gordon

"There is nothing - absolutely nothing- half so much worth doing as simply messing about in boats" Ratty in Wind in the Willows


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