XPost: alt.energy.renewable   
   From: aclarke2005@toucansurf.com   
      
   "Gaetan Mailloux"  wrote in message   
   news:jioejc$1go$1@theodyn.ncf.ca...   
   > Hello   
   >   
   > I never succed with PIC programing, so I've assembled a schematic of a   
   > simple version pwm sine inverter.   
   >   
   > I have few SG3524 but no SG3525, and I can't find any SG3525 here around,   
   > that why I use a SG3524 in my schematic.   
   >   
   > I know that I won't get a very good sine at the transformer output, but   
   > I've ad a negative feedback from the transformer output to the SG3524   
   > input to do a better sine.   
   >   
   > I can even use one of my big standard EI silicon steel transformer, but it   
   > would better to bring down my SG3524 oscillation frequency to 200 hz or   
   > 300 hz, because at higher oscillation frequency the Eddy current would be   
   > quite high in my output transformer.   
   >   
   > At those low oscillation frequency (200 to 300 hz) the LC low pass filter   
   > would need a big L coil, but it would be easyer to keep my SG3524 circuit   
   > very stable.   
   >   
   > Anyones can look at my schematic and tell me if it would work ok ?   
   >   
   > Here is the link to my schematic image:   
   >   
   > http://data.imagup.com/10/1145289095.gif   
   >   
   > Thank you   
   >   
   > Bye   
   >   
   > Gaetan   
      
   What has this got to do with digital (PIC`s...) circuitry?   
   Why not just use a basic amplified and switched sine wave oscillator (using   
   a pair of transistors)?   
   Have you tried running the output through a computer simulator?   
   Isn`t it the Step-up Transformer that does all the work at the end of the   
   day?   
      
      
   Regards   
      
   Ashley Clarke   
      
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