GATE 2024 EE – Question 63
A single-phase full bridge voltage source inverter (VSI) feeds a purely inductive load. The inverter output voltage is a square wave in $180^\circ$ conduction mode. The fundamental frequency of the output voltage is 50 Hz. If the DC input voltage of the inverter is 100 V and the value of the load inductance is 20 mH, the peak-to-peak load current in amperes is __________ (rounded off to the nearest integer).
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Correct answer: 50
Explanation
The load sees $\pm100$ V, each lasting half a period $=10$ ms. For a purely inductive load the current ramps linearly: $\Delta i=\dfrac{V\,t}{L}=\dfrac{100\times10\times10^{-3}}{20\times10^{-3}}=50$ A, which is the peak-to-peak value.