15 Power Electronics Interview Questions for EV Roles

Power electronics interviews for EV roles drill into device-level + circuit-level + system-level questions. Here are 15 that recur across Bosch India, Continental India, Sona Comstar BLW and the EV OEMs.

Devices

• When does SiC outperform Si MOSFET and at what cost delta?
• Explain gate-driver requirements for SiC vs IGBT.
• What's the role of Miller capacitance in switching loss?
• Walk through double-pulse test interpretation.
• What's the body diode behaviour in a SiC MOSFET?

Circuits

• Compare half-bridge vs T-type vs neutral-point-clamped topologies.
• How do you mitigate ringing in a hard-switched half-bridge?
• What's the role of decoupling capacitance in switching loops?
• Walk through bus-bar parasitic inductance design.
• How do you design snubbers vs avoid them?

System + EMC

• How do you size DC-link capacitance?
• Walk through CISPR 25 conducted-emission limits.
• What's the typical EMI filter topology for an inverter?
• Explain common-mode vs differential-mode noise.
• How do you measure efficiency at low torque vs high torque?

Where to go from here

Senior power-electronics interviews favour candidates who can sketch on a whiteboard while talking. Practise that — load up an erasable board at home, set a stopwatch, talk through your last design as if to the interviewer.

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