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This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
1. |
If V1 and V2 are the instantaneous voltages of the two converter circuits in the dual convert, then the output voltage is |
A. | V1 + V2 |
B. | (V1 + V2)/2 |
C. | V1 – V2 |
D. | 2(V1 + V2) |
Answer» C. V1 – V2 | |
2. |
The reactor in circulating current type dual converters |
A. | increases losses |
B. | reduces power factor |
C. | increase the weight of the circuit |
D. | all of the above |
Answer» E. | |
3. |
Circulating current flows |
A. | from load to converters |
B. | from one converter to another converter |
C. | in the whole circuit |
D. | none of the mentioned |
Answer» C. in the whole circuit | |
4. |
In case of circulating current type dual converters, the reactor is inserted between |
A. | supply and converter |
B. | across the load |
C. | between the converters |
D. | no reactor is used in case of circulating type dual converter |
Answer» D. no reactor is used in case of circulating type dual converter | |
5. |
In case of three-phase dual converter, one of the converter circuits is fired at an angle of 60°. For both the converter circuits to have equal average output voltage, what is the value of the firing angle for the other converter circuit? |
A. | 60° |
B. | 120° |
C. | 100° |
D. | Insufficient data |
Answer» C. 100° | |
6. |
What causes circulating current in dual converters? |
A. | Temperature issues |
B. | Inductance in load circuit |
C. | Out of phase voltages from both the converters |
D. | none of the mentioned |
Answer» D. none of the mentioned | |
7. |
In circulating current mode dual converters, the circulating current is avoided by |
A. | connecting a series reactor |
B. | maintaining α1 + α2 = 180° |
C. | operating only one converter |
D. | adding an extra SCR |
Answer» B. maintaining α1 + α2 = 180° | |