Traction inverter

1.Why do traction inverters require galvanic isolation in gate drivers?

• a) To reduce motor weight

• b) To separate high-voltage (HV) and low-voltage (LV) domains for safety

• c) To increase PWM frequency beyond 1MHz

• d) To eliminate the need for cooling systems

2.What is the primary purpose of the Control Law Accelerator (CLA) in a C2000 MCU?

•   A) To manage external memory interfaces (EMIF)

• B) To offload real-time control tasks from the main CPU

• C) To perform high-resolution analog-to-digital conversions

• D) To replace the need for an FPU

Which application benefits most from the Trigonometric Math Unit (TMU) in a C2000 MCU?

• A) UART serial communication

• B) Low-power sleep mode management

• C) External flash memory addressing

• D) Field-Oriented Control (FOC) for motors

How does the Configurable Logic Block (CLB) enhance a C2000 MCU’s functionality?

• A) By adding FPGA-like programmable logic for custom digital functions

• B) By doubling the CPU clock speed

• C) By replacing the need for an ADC

• D) By increasing flash memory capacity

5. In a 3-phase voltage source inverter (VSI), what is the minimum number of switches conducting at any instant in 120° conduction mode?

• 1

• 2

• 3

• 4

6. What is the purpose of dead-time in inverter switching?

• A) To increase switching frequency

• B) To prevent shoot-through (short-circuit)

• C) To reduce DC bus voltage

• D) To synchronize with grid frequency

What is the primary purpose of a snubber circuit in an inverter?

• A) Reduce switching losses

• B) Improve power factor

• C) Limit voltage spikes during turn-off

• D) Synchronize with grid frequency

Which protection feature is ESSENTIAL to prevent IGBT damage during a short-circuit fault?

• A) Overcurrent detection (DESAT protection)

• B) Temperature monitoring

• C) UVLO (Undervoltage lockout)

• D) Soft-start circuit

9. How does dead-time insertion affect inverter losses?

• A) Reduces conduction losses

• B) Increases switching losses

• C) Introduces distortion but lowers losses

• D) Has no impact on efficiency

10. Which of the following reduces thermal losses in an IGBT-based inverter?

• A) Increasing junction temperature

• B) Using a higher switching frequency

• C) Parallel connection of devices

• D) Eliminating heat sinks