The PWM signal through gate drive transformer drives power transistors only, power transistors & 2 X 470uF capacitor form half bridge converter (please read on half bridge converter) which in turn drives the main transformer.How the pwm signal goes to the main transformer?, through the drive transformer?, I mean first pulses to drive then again to main?
Those are the power transistors?The PWM signal through gate drive transformer drives power transistors only, power transistors & 2 X 470uF capacitor form half bridge converter (please read on half bridge converter) which in turn drives the main transformer.
Yes. High voltage BJT have relative low current gain. Transformer is an efficient way to provide the drive power.Those are the power transistors?
The schematic shows the part number (too small for me to read).Those are the power transistors?
Dear Tony. It's not me who needs the information. ;-) The OP asked about this.Dear Klaus, I posted both clear schematics and BJT link. FWIW https://alltransistors.com/adv/pdfview.php?doc=2sc2625.pdf
My bad. https://alltransistors.com/adv/pdfview.php?doc=2sc2625.pdf&dire=_mospecWeb links in posts 9 & 11 worked for me (four total).
I got no 'caution' alert from any.
Hold it... Four links opened websites. However the specific all-transistors data sheets do not appear... Instead there's a dark grey area. Just readable is '404 not found'.
I also got this errorHi,
Dear Tony. It's not me who needs the information. ;-) The OP asked about this.
And I just wanted to point out that he has all the necessary information to answer the question himself. With less effort for him than for us.
And yes, I see your efforts to find and post a clear schematic and links to datasheets. That's very kind of you... but I think it's the OP's job.
I think these are rather basic and simple tasks. One does not need to be an engineer.
And it´s not difficult to read the first words in the datasheet that say "POWER TRANSISTOR".
On the other hand I don´t want you to stop your behaviour.
Btw: Just tried both your datasheet links. Both say "404 File not found". Did not investigate why.
Klaus
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