bogdanserban
Newbie level 4
Greetings,
I am designing a forward converter transformer. I have two books that I use as a reference, one is "Practical Switching Power Supply Design" by Marty Brown and the other is "Switching Power Supply Design" by Pressman.
To calculate the number of turns, the first book gives the formula: Np = Vin * 10^8 / f * 4 * Bmax * Ac. I have chosen Bmax to be 1600G and for a given transformer that results in about 60 turns.
The second book gives the formula Np = Vin * Ton * 10^8 / dB * Ac. In this case the flux swing dB is 1600G since the converter operates in the second quadrant only. That results in about twice the number of turns. So which is correct?
I have used the first formula for half-bridge converters with no issues, but I am unsure about the forward converter.
Thank you.
I am designing a forward converter transformer. I have two books that I use as a reference, one is "Practical Switching Power Supply Design" by Marty Brown and the other is "Switching Power Supply Design" by Pressman.
To calculate the number of turns, the first book gives the formula: Np = Vin * 10^8 / f * 4 * Bmax * Ac. I have chosen Bmax to be 1600G and for a given transformer that results in about 60 turns.
The second book gives the formula Np = Vin * Ton * 10^8 / dB * Ac. In this case the flux swing dB is 1600G since the converter operates in the second quadrant only. That results in about twice the number of turns. So which is correct?
I have used the first formula for half-bridge converters with no issues, but I am unsure about the forward converter.
Thank you.