Transformer
Seems liks a lot of copper to me, If you are using simular calculations I seen.
Vin(max) = 380 volts (at turn on) then the number of turns in the primary for a half bridge for ETD39 coreset is:
382E8 / 4(50kHz)(3000G)(1.25) = 50 Turns
I used 3000G because of the 50kHz the bmax for ETD39 is on the order of 3300G ,Saturation shouldn't be a problem??? Have you considered changing the FSW to 100kHz you would reduce the copper by about 50% and the turns for both secondary and primary would be reduced .... just a thought also the ETD39 at that frequency is cabable of a liitle over 900 watts.
You didn't mentioned your design parameters but the higher frequency will mean smaller components all around in most situations.
chas1
Seems liks a lot of copper to me, If you are using simular calculations I seen.
Vin(max) = 380 volts (at turn on) then the number of turns in the primary for a half bridge for ETD39 coreset is:
382E8 / 4(50kHz)(3000G)(1.25) = 50 Turns
I used 3000G because of the 50kHz the bmax for ETD39 is on the order of 3300G ,Saturation shouldn't be a problem??? Have you considered changing the FSW to 100kHz you would reduce the copper by about 50% and the turns for both secondary and primary would be reduced .... just a thought also the ETD39 at that frequency is cabable of a liitle over 900 watts.
You didn't mentioned your design parameters but the higher frequency will mean smaller components all around in most situations.
chas1
core loss vs copper loss
Not knowing your design requirements and since core loss depends on temp, freq and bmax vs output requirements add to that that all transformers should be breadboarded and tested you could be right for your requirements. I would start at 3000 myself at that frequency. I have included a link to a pdf file that might help you.
http://powerelectronics.com/mag/June 2004 PET.pdf
chas1
Not knowing your design requirements and since core loss depends on temp, freq and bmax vs output requirements add to that that all transformers should be breadboarded and tested you could be right for your requirements. I would start at 3000 myself at that frequency. I have included a link to a pdf file that might help you.
http://powerelectronics.com/mag/June 2004 PET.pdf
chas1
Hi
I don't think that you will have too much losses, but if you do you can still correct this...
I don't think that you will have too much losses, but if you do you can still correct this...
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