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Pol , are you familiar with 2nd order filter basics ? e.g cut off frequency and .... ?
Oh i think i told you a thing wrong ! 3db is for first order filters , sorry , if you saw 6 db decreasing ,( because this is 2nd order filter ) you can say that is cut off frequency .
Respect
Goldsmith
i'm very happy too , because you could do your project successfully .
Well , now , what is your problem , if you explain , your problem , i'll be happy to help you .
Best Luck
Goldsmith
there is not such problem. just plan to start new project of UPS. planning to make about 600W to 1KW UPS. dont have much such experience of making such things
my input voltage would be 12VDC and output will be 220 to 250 VAC. if i go for 600W, the current would be 2.5 - 2.7A and if go for 1KW, thn the current would be 4A
well , you can use an H bridge or push pull converter ( if your power was higher than this , you couldn't implement it with push pull , simply ) to increase your voltage , ( i think H bridge is good for your project ) ( increase it up to 311 VDC ) and then another H bridge , but without transformer , and then an LPF ( butter worth family ) and then a feed back loop from your out put to your first stage ( you should rectify and filter your feed back voltage ) . the command signal of 2nd stage will be an SPWM .
Best Wishes
Goldsmith
ofcourse 1st part. step-up the voltage upto 311v as u said. i dont know what should be the appropriate frequency for this purpose. remember about the watt. i need upto 1000W.
Dear Muhammad
Hi
If you are using current mode topologies , you'de better to decrease your frequency e.g 100KHZ . and for carrier frequency of latest stage , i suggest you to use 50KHZ , triangle wave , as carrier .
Best Events
Goldsmith
---------- Post added at 17:59 ---------- Previous post was at 17:57 ----------
And dear pol
As muhammad suggested , you can use snubber network . but there are some other ways too , such as creating a littler gap space in your core or use a proper glue .
Best Wishes
Goldsmith
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