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Power Electronics

In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

Power Electronics /
In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

A. Multiple of two
B. Odd multiple of three
C. Odd multiple of five
D. Odd multiple of seven

In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________? Read More »

Power Electronics

For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________?

Power Electronics /
For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________?

A. Three inductances
B. Three capacitances
C. Three resistance
D. Three transistors

For commutation in three phase PAC, normally balanced three phase voltages VR, VY and VB are connected to the three legs of the converter via______________? Read More »

Power Electronics

If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered_____________?

Power Electronics /
If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered_____________?

A. 120 degree after the zero crossing of the corresponding line voltages
B. 60 degree after the zero crossing of the corresponding line voltages
C. 120 degree before the zero crossing of the corresponding line voltages
D. 60 degree before the zero crossing of the corresponding line voltages

If all the SCR’s of 3 phase PAC is replaced by diodes, they would be triggered_____________? Read More »

Power Electronics

The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as____________?

Power Electronics /
The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as____________?

A. Susceptibility
B. Emission
C. Interference
D. Electromagnetic compatibility

The ability of an electronic system to function properly in its intended electromagnetic environment and should not be a source of pollution to that electromagnetic environment is known as____________? Read More »

Power Electronics

In a lossless inverter, the average power absorbed in one period by the load must be__________?

Power Electronics /
In a lossless inverter, the average power absorbed in one period by the load must be__________?

A. Equal to the average power supplied by the dc source
B. Greater than the average power supplied by the dc source
C. Lesser than the average power supplied by the dc source
D. Equal to the average power supplied by the ac source

In a lossless inverter, the average power absorbed in one period by the load must be__________? Read More »

Power Electronics