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The overlap angle of a phase controlled converter will increase if
  1. The firing angle increases
  2. The frequency of supply increases
  3. The supply voltage increases
Among the above statements 
  • a)
    1 and 2 are correct
  • b)
    2 and 3 are correct
  • c)
    1 and 3 are correct
  • d)
    1, 2 and 3 are correct
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The overlap angle of a phase controlled converter will increase if The...
With increase in frequency the effective reactance at source increases which increase overlap angle. If supply voltage increases current will take more time to build up through source inductance, hence μ increases.  If firing angle increases to maintain constant average current overlap angle will decrease. (observe by putting α=0,30,60 etc)
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Most Upvoted Answer
The overlap angle of a phase controlled converter will increase if The...
Explanation:
The overlap angle in a phase-controlled converter is defined as the interval between the turn-off of one thyristor and the turn-on of the next thyristor. It is expressed in terms of firing angle and the frequency of supply.

The firing angle is the angle between the instant of zero voltage crossing and the instant at which the thyristor is triggered. Therefore, the overlap angle will increase if the firing angle increases. This is because the time interval between the turn-off of one thyristor and the turn-on of the next thyristor will increase, resulting in a larger overlap angle.

The frequency of supply also affects the overlap angle. As the frequency of supply increases, the time interval between the zero voltage crossing points decreases. Therefore, the overlap angle will decrease.

However, the supply voltage does not affect the overlap angle. The overlap angle depends only on the firing angle and the frequency of supply.

Therefore, option B is the correct answer as both statement 2 and statement 3 are correct.
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The overlap angle of a phase controlled converter will increase if The firing angle increases The frequency of supply increases The supply voltage increasesAmong the above statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer?
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