awright Posted January 29, 2006 Report Share Posted January 29, 2006 madammim, as other posters have said, the transformer core has to be magnetically "reset" between cycles to avoid saturation of the core and resulting high currents limited only by the resistance of the wire in the primary winding. Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 29, 2006 Report Share Posted January 29, 2006 Hi Awright,I like your oversimplification about a transformer winding with DC on it. I am used to little audio transformers that are not allowed to have any DC applied to them for them to avoid saturation. ;D Quote Link to comment Share on other sites More sharing options...
indulis Posted January 29, 2006 Report Share Posted January 29, 2006 I can't quite agree with the "over simplification" of the transformer in terms of how much DC current will flow. If the primary is switched at such a frequency that the core never saturates, there is no DC current. The primary current waveform is the familiar ramp on a step (trapezoidal). The step amplitude is the secondary DC current reflected to the primary and the ramp is the reflected inductor current plus the primary magnetization current. Yes, equivalent DC and DCrms currents can be calculated, but they are not a steady DC level. Quote Link to comment Share on other sites More sharing options...
mdj300b Posted February 12, 2006 Report Share Posted February 12, 2006 Hi, and what are happened? >:( ;D Quote Link to comment Share on other sites More sharing options...
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