Electrical Engineering XYZ MCQs
After proper turn on of thyristor:
- Gate signal should present but can be removed
- Gate signal is always present
- Gate signal must be removed
- None of the above
Correct answer: 3. Gate signal must be removed
Explanation: In certain applications, it’s necessary to remove the gate signal after the thyristor has been properly turned on to reduce losses in the gate circuit. Continuous application of the gate signal can lead to unnecessary power dissipation in the gate circuit, which may not be desirable, especially in high-power applications where minimizing losses is crucial.
Therefore, while the gate signal is initially required to trigger the thyristor, in some cases, it should be removed after proper turn-on to minimize losses. This ensures efficient operation of the thyristor.