Performance measurement and analysis of isolated DC-DC flyback converter

Answer the questions given below (refer Fig.2):


Fig. 2. Circuit diagram of flyback converter.


1. Choose the correct expression for inductor ripple current (∆iLm)::

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2. Find the load current when input current is 0.5 A and duty ratio-D is 0.7 with unity turns ratio
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3. A flyback converter has ‘Vin’ as source voltage and ‘D’ is the duty ratio. Find the r.m.s value of output voltage with unity turns ratio

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4. Which material is used to make the core of Flyback transformer
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5. A flyback converter in continuous conduction mode converts 160 V DC to 3.3 V DC. If the duty cycle is 0.40, calculate the turns ratio of the transformer. Assume negligible voltage drop across switch and diode.
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