Comments on: Transformer test http://www.anderswallin.net/2007/07/transformer-test/ Thu, 20 Nov 2008 20:54:15 +0000 http://wordpress.org/?v=2.6.3 By: Tero http://www.anderswallin.net/2007/07/transformer-test/#comment-19804 Tero Thu, 05 Jul 2007 16:18:16 +0000 http://www.anderswallin.net/2007/07/transformer-test/#comment-19804 David LeVine had a good point in the previous post which might just explain this. At relatively low load, "duty cycle" of transformer may be for example 10%. So if you draw 1Amp, transformer sees 10A load at 10% duty cycle. That would equal 10x larger voltage drop compared to pure sinusoidal load which appears always as 100% duty cycle load. PFC circuit can be used to rectify AC more efficiently. David LeVine had a good point in the previous post which might just explain this. At relatively low load, “duty cycle” of transformer may be for example 10%. So if you draw 1Amp, transformer sees 10A load at 10% duty cycle. That would equal 10x larger voltage drop compared to pure sinusoidal load which appears always as 100% duty cycle load.

PFC circuit can be used to rectify AC more efficiently.

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