Hi, I would like to add a voltage doubler and a -ve voltage output to my power supply. I modified my LTSpice simulation by following the schematic at https://threeneurons.wordpress.com/nixie-power-supply/ (Adding Multiple Voltages) to add the extra output stages, but I am not getting the expected results. One difference is that I am using a flyback transformer rather than an inductor. It seems that the un-rectified output from the transformer goes negative, and this additional voltage is being added to the output. Here is the output part of the schematic (sorry it is a bit chaotic):
<https://lh3.googleusercontent.com/-M37V0VBN9Zo/Wk-m5_GCCSI/AAAAAAAAApE/Oz_RwCLEGuQeGcOGo9sqvcd368aKcdBTgCLcBGAs/s1600/Vdouble_s.JPG> Here are the waveforms for out, outdouble, outneg and the PS1 (the cyan trace) : <https://lh3.googleusercontent.com/-xfdQ1_yz6Ko/Wk-nCvEY7SI/AAAAAAAAApI/qRDfHjwMmyowL6plGYxmC2VVJtDJOrOdwCLcBGAs/s1600/Vdouble.JPG> - Vout is around 148V. - The cyan trace goes to -62V. - Outneg is -205V. If I subtract the -62V, then I get -143V (i.e. close to -148V). - Outdouble is 351V. If I add the -62V I get 289V (i.e. roughly double the 148V). Is there something wrong with how I am trying to apply what threeneurons shows? Is this just how it is with flyback power supplies? Is there something amiss with my simulation? I don't now where to start to think about this, so any help would be very appreciated. Thanks - Paul -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f12a0958-c70e-4b02-85fa-26d5a3171ea8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
