EV605/EE605-Lab Assessment

Lab Assessment/Viva

Made by @Prathap

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1: What is the maximum system clock frequency of the dual-core TMS320F28379D microcontroller on the TI C2000 Delfino LaunchPad?

10s

2 MHz

200 kHz

200 MHz

100 MHz

2: When building a Simulink model to blink the two onboard user LEDs (D9 Red and D10 Blue) on the LAUNCHXL-F28379D board, which pair of GPIO pins must be selected in the C2000 Digital Output blocks?

10s

GPIO31 and GPIO34

GPIO32 and GPIO33

GPIO0 and GPIO1

GPIO35 and GPIO36

3: In MATLAB/Simulink, a Constant block with a value of 1 and a sample time of 0.25 s feeds a C2000 Digital Output block with 'Toggle' mode enabled to blink an LED on the F28379D LaunchPad. What is the resulting blinking frequency of the LED?

10s

4 Hz

2 Hz

20 Hz

1 Hz

4: What is the maximum number of PWM output signals that can be generated using the ePWM modules of the TMS320F28379D LaunchPad?

10s

12

48

24

96

5: If TBPRD = 5000 and the duty cycle is 60%, what will be the CMPA value?

10s

2000

3000

6000

5000

6: If the TBCLK frequency is 100 MHz, how many dead-band counts are required to generate a dead time of 1 µs?

10s

10

100

50

200

7: If a 3-phase inverter uses ePWM1, ePWM2 and ePWM3, how many complementary gating outputs are generated?

10s

3

6

12

9

8: Why should complementary gate signals be checked before energizing the DC link?

10s

To verify phase current

To measure rotor speed

To avoid overlapping switch commands

To set rotor resistance

9: For modulation index = 0.5 and a normalized triangular carrier of ±1, which statement is correct

10s

Reference peak is 0.5

Carrier frequency becomes 0.5fc

Reference peak is 1.5

Overmodulation is required

10: For 50 Hz fundamental and 2.5 kHz carrier, how many carrier periods occur per fundamental cycle?

20s

25

100

50

250

11: For ideal unipolar SPWM, how many output voltage levels are possible?

10s

2

1

3

4

12: In unipolar SPWM, the reference signals for the two H-bridge legs are displaced by:

10s

60 degrees

180 degrees

120 degrees

90 degrees

13: If the modulation index increases from 0.5 to 0.8 in linear SPWM, the fundamental output voltage:

10s

EV605/EE605-Lab Assessment

What is the maximum system clock frequency of the dual-core TMS320F28379D microcontroller on the TI C2000 Delfino LaunchPad?

1: What is the maximum system clock frequency of the dual-core TMS320F28379D microcontroller on the TI C2000 Delfino LaunchPad?

2 MHz

200 kHz

200 MHz

100 MHz

When building a Simulink model to blink the two onboard user LEDs (D9 Red and D10 Blue) on the LAUNCHXL-F28379D board, which pair of GPIO pins must be selected in the C2000 Digital Output blocks?

2: When building a Simulink model to blink the two onboard user LEDs (D9 Red and D10 Blue) on the LAUNCHXL-F28379D board, which pair of GPIO pins must be selected in the C2000 Digital Output blocks?

GPIO31 and GPIO34

GPIO32 and GPIO33

GPIO0 and GPIO1

GPIO35 and GPIO36

In MATLAB/Simulink, a Constant block with a value of 1 and a sample time of 0.25 s feeds a C2000 Digital Output block with 'Toggle' mode enabled to blink an LED on the F28379D LaunchPad. What is the resulting blinking frequency of the LED?

3: In MATLAB/Simulink, a Constant block with a value of 1 and a sample time of 0.25 s feeds a C2000 Digital Output block with 'Toggle' mode enabled to blink an LED on the F28379D LaunchPad. What is the resulting blinking frequency of the LED?

4 Hz

2 Hz

20 Hz

1 Hz

What is the maximum number of PWM output signals that can be generated using the ePWM modules of the TMS320F28379D LaunchPad?

4: What is the maximum number of PWM output signals that can be generated using the ePWM modules of the TMS320F28379D LaunchPad?

12

48

24

96

If TBPRD = 5000 and the duty cycle is 60%, what will be the CMPA value?

5: If TBPRD = 5000 and the duty cycle is 60%, what will be the CMPA value?

2000

3000

6000

5000

If the TBCLK frequency is 100 MHz, how many dead-band counts are required to generate a dead time of 1 µs?

6: If the TBCLK frequency is 100 MHz, how many dead-band counts are required to generate a dead time of 1 µs?

10

100

50

200

If a 3-phase inverter uses ePWM1, ePWM2 and ePWM3, how many complementary gating outputs are generated?

7: If a 3-phase inverter uses ePWM1, ePWM2 and ePWM3, how many complementary gating outputs are generated?

3

6

12

9

Why should complementary gate signals be checked before energizing the DC link?

8: Why should complementary gate signals be checked before energizing the DC link?

To verify phase current

To measure rotor speed

To avoid overlapping switch commands

To set rotor resistance

For modulation index = 0.5 and a normalized triangular carrier of ±1, which statement is correct

9: For modulation index = 0.5 and a normalized triangular carrier of ±1, which statement is correct

Reference peak is 0.5

Carrier frequency becomes 0.5fc

Reference peak is 1.5

Overmodulation is required

For 50 Hz fundamental and 2.5 kHz carrier, how many carrier periods occur per fundamental cycle?

10: For 50 Hz fundamental and 2.5 kHz carrier, how many carrier periods occur per fundamental cycle?

25

100

50

250

For ideal unipolar SPWM, how many output voltage levels are possible?

11: For ideal unipolar SPWM, how many output voltage levels are possible?

2

1

3

4

In unipolar SPWM, the reference signals for the two H-bridge legs are displaced by:

12: In unipolar SPWM, the reference signals for the two H-bridge legs are displaced by:

60 degrees

180 degrees

120 degrees

90 degrees

If the modulation index increases from 0.5 to 0.8 in linear SPWM, the fundamental output voltage:

13: If the modulation index increases from 0.5 to 0.8 in linear SPWM, the fundamental output voltage:

Decreases

Remains constant

Increases

Becomes zero

In a magnetic relay, what happens to air-gap reluctance when the gap length doubles?