Advanced Power Electronics Devices and Interface Circuits — Winter 2021

State the advantages and applications of WBG devices.

Compare SiC devices with Si devices.

Write a note on Wide Band Gap devices.

Draw the pin diagram of IR2110 and explain briefly its pins.

Explain why isolated driver is required in power electronics.

Suggest IC based driver circuit with short circuit protection for half bridge and explain working of the same.

Draw the schematic of relay driver ULN 2803 for driving a motor load using a microcontroller. Explain its working.

Explain the use and importance of differential voltage probes.

Write a note on galvanic isolation.

Explain the construction and working of hall effect sensors.

Explain in brief the use of logic analyzer.

Write a note on isolation amplifier.

Draw schematic and explain voltage measurement using Op-Amp. Also explain how will you interface the output of the Op-Amp with a microcontroller.

Which type of core is required for high frequency switching applications. State different types of cores used in practice.

Explain Fto Vconversion using LM331.

State and explain the steps for transformer design of forward converter.

Explain the consequence of a transformer getting saturated

Discuss the reason of keeping airgap in high frequency inductors.

Design a high frequency transformer for a forward converter having the following specifications: V = 12V,V = 24V±10%,I = 4A,V = 1% of V,f = 20kHz,J = o in o outripple o sw 3 A/mm2,B = 0.2T. Assume no drop across diode and inductor. m

Explain briefly, floating ground in power converters.

State the requirement and importance of cooling in semiconductors.

Write a note on thermal resistance.

Explain briefly, common mode signals in power electronics circuits.

Discuss steps of heat sink design and calculation for a given power switch.

Write a note on cooling methods.