Question

( Q2) Marks 14+14+6 In Fig 2 L1 mH and R-0.001 2 Vac 60 V. Square wave switching is used with switching frequency of 300 Hz and 50% duty cycle. Assume ideal switches and ideal diodes. Switches S1, S2. S3 and S4 are IGBTs/MOSFETs and Diode D and D2, D3 and D4 are antiparallel body diodes of these devices.. At steady state Sketch the gate signal for S1, VAN and o. For each region, indicate the conducting devices, by clearly mentioning if the current is flowing through the active device or diode. Mark the maximum and minimum values of VAN and i () Sketch voltage across S1, current i, ia and. Mark the values of salient points Note: All waveforms must be synchronized with respect to gate signals of Si Explain the need of diodes and C in the circuit ? Di S1 D3 S3 D2 S2 Fig 4

Answer 1

S1,S2. swituhing S1 S3, S4 Switching S3 12 Noltaz* AN dc 5152 ou 2

Jate signal Vol+ dc SIİS ON Voltage achds Lt », ZNo t when it is of f Vdl d. 2 a is same as

diodes fow which is done
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