This is part of an assignment for my Power Electronics course and I really need

Question

This is part of an assignment for my Power Electronics course and I really need help! Here's how the problem works:

In a Forward Converter, Vin = 30 V, N1 = 10 turns, N2 = 5 turns, and N3 = 10 turns. The self-inductance of winding 1 is 150 uH, and the switching frequency fs = 250 kHz. The output voltage is regulated such that Vo = 5 V. The output filter inductance is 50 uH, and the output load is 30 W.

Why is diode D1 necessary in Figure 8.4(b)?

This is part of an assignment for my Power Electronics course and I really need help! Here's how the problem works: In a Forward Converter, Vin = 30 V, N1 = 10 turns, N2 = 5 turns, and N3 = 10 turns. The self-inductance of winding 1 is 150 uH, and the switching frequency fs = 250 kHz. The output voltage is regulated such that Vo = 5 V. The output filter inductance is 50 uH, and the output load is 30 W. Why is diode D1 necessary in Figure 8.4(b)?

Explanation / Answer

the name indicates forward converter that means it will allow current in one direction only

when load is RLE load that is controlling a motor, sometimes because of overhauling charateristics the motor will run above rated speed

because of that the motor is able to deliver the power to source

in order to prevent this the diode D1 is used

D1 allows flow of current from DC source to load

but blocks current from load to source

thats the reason why we are using a diode D1

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