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GATE 2023 Power Electronics Quiz 53
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An integrated circuit is to be operated from a 60 Hz ac line voltage. Which of the following converter is suitable for this application?
Statement I: AC voltage regulators can be used to convert fixed AC to variable AC
Statement II: TRIAC can be used in phase-controlled Rectifiers.
Statement I: UJT firing circuit is suitable for feedback Networks.
Statement II: UJT depicts the negative resistance characteristics.
A DC source of 100 V supplies a purely inductive load 0.1H. The controller is a thyristor in series with the source and load. The latching current specified is 100mA . The minimum width of the gating pulse to ensure thyristor turn ON is
The holding current of thyristor in the single-phase full converter is IH = 400 mA and the delay time is td = 2 μsec. The converter is supplied from a 120 V, 50 Hz supply and has a load of L = 10 mH and R = 10Ω. The converter is operated with a delay angle of α = 30°. Determine the minimum value of gate pulse width.
The thyristor in figure has a latching current of 50 mA and it is fired by a pulse length of 50 microseconds, the maximum value of R to ensure firing of thyristor is
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Oct 26ESE & GATE EE