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Achiever Study Plan ESE-2018:Power Electronics Quiz 4
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Question 1
A three-phase fully-controlled bridge converter is connected to a 415 V supply, having a source resistance of 0.3Ω and inductance of 1.2 mH per phase. The converter is working in the inversion mode at a firing advance angle of 30 °. What is the average generator voltage for the condition: dc current Id = 60A, thyristor drop = 1.5 V and f = 50 Hz?
Question 2
A field transistor with an anti-parallel body diode blocks:
Question 3
Consider the following statements:
1. A thyristor requires turn off circuit while transistor does not.
2. The voltage drop of a thyristor is less than that of a transistor.
3. A thyristor requires a continuous gate current.
4. A transistor draws continuous base current.
Which of these statements are correct?
1. A thyristor requires turn off circuit while transistor does not.
2. The voltage drop of a thyristor is less than that of a transistor.
3. A thyristor requires a continuous gate current.
4. A transistor draws continuous base current.
Which of these statements are correct?
Question 4
A thyristor has a PIV of 650 V. The voltage safety factor is 2. Then the voltage upto which the devices can be operated is given by
Question 5
An SCR triggered by a current pulse applied to the gate-cathode can be turned off
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Aug 10ESE & GATE EE
