A flyback converter operates with a 160 Vdc input and produces a 24 Vdc output. The maximum load current is 1.5 A. The transformer turns ratio is 8:1. The switching frequency is 150 kHz. The converter should be designed to operate in the discontinuous conduction mode at all load currents. The total copper loss should be less than 0.75 W, based on the winding dc resistances. For this problem (Questions 8-19), you should solve the converter by ignoring all losses and assuming a temperature of 25 °C.
A. Compute the rms current in each winding. Then find Itot, the sum of rms winding currents referred to as the primary winding. Enter your value of Itot below, accurate to ±1%.
B. Assume a winding fill factor of Ku=0.4, and use Bmax=0.25T. Compute the required core geometrical constant Kg. Enter your result below, in cm5, with an accuracy of ±2%.
A. Compute the rms current in each winding. Then find Itot, the sum of rms winding currents referred to as the primary winding. Enter your value of Itot below, accurate to ±1%.
B. Assume a winding fill factor of Ku=0.4, and use Bmax=0.25T. Compute the required core geometrical constant Kg. Enter your result below, in cm5, with an accuracy of ±2%.
