Refer to the given flyback converter circuit diagram If Vo i

Refer to the given flyback converter circuit diagram. If Vo is 5 V for a 5 ohm load resistor, Vin = 30 V , N1/N2 = 3 , the magnetizing inductance Lm1 = 500 uH, and switching frequency fs = 40kHz, calculate the duty ratio D, average Iin and Iout , and Iin(0) , Iin , Iout (0) , Iout as shown in the figure . Assume lossless conditions.

out in in Figure 1 (a) Flyback converter Iin(0) (b) its waveforms

Solution

fly back dc introduction we see The flyback dc-dc converter topology results in significant cost and space savings for multiple output power supplies with high output voltage for power levels up to 100W. Flyback topologies store and transfer energy using a transformer, which due to physical limitations can cause large voltage transient spikes during the switching cycle. This article outlines the design of dissipative voltage suppression circuits (voltage snubbers) that can be used to suppress these transients on both the primary and secondary side.