GATE EE 2016 Set 1 — Question 33
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Power Electronics → Power Semiconductor Devices → MOSFET & IGBT Characteristics
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Question
A steady dc current of 100 A is flowing through a power module (S, D) as shown in Figure (a). The V-I characteristics of the IGBT (S) and the diode (D) are shown in Figures (b) and (c), respectively. The conduction power loss in the power module (S, D), in watts, is ________.
Correct answer
169 to 171
Solution
The power module consists of an IGBT (S) and an anti-parallel diode (D).
1.Identify the current path: Figure (a) shows a steady DC current of flowing upwards into the module. Based on the circuit symbols, the IGBT (S) conducts current downwards (from collector to emitter), while the diode (D) conducts current upwards (from anode to cathode). Therefore, the current flows entirely through the diode.
2.Determine diode voltage drop: From the V-I characteristic of the diode in Figure (c), the voltage drop is given by the linear equation:
Where (the intercept) and (the slope).3.Calculate power loss: The conduction power loss is:
Thus, the conduction power loss is .Continue learning with Success Tracker
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