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GATE 2019: Power Electronics Quiz 8 (App update required to attempt this test)
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Question 1
A 3 - ∅ halfwave controlled converter is fed from 3 phase, 400 V, 50 Hz source and is connected to load taking a constant current of 36 A. Thyristor have a voltage drop of 1.4 V. The average power dissipated in each thyristor is,
Question 2
For an ac voltage controller fed induction motor drive negotiating a load whose torque requirement does not vary with speed.
Question 3
A 1-φ, semi-converter supplies power to RLE load, the source voltage is 230 V, 50 Hz and for load R=5 Ω, L=5mH & E=100 V, for a firing angle of 30o, the average value of output current in case load current is extinguished at ωt=200 is _______ A.
Question 4
A single-phase bridge-type cycloconverter has input voltage of 230 V, 50 Hz and load of R = 10Ω. Output frequency is one-third of input frequency. For a firing angle delay of 30 °. The rms current of each thyristor is______A?
Question 5
A 1-Φ AC voltage controller feeds power to a resistive load of 5Ω, from 230 V, 50 Hz source calculate power [in kW] delivered to load when α=π/3.
Question 6
A single-phase fully controlled ac voltage regulator has 120 V rms source. The load resistance is 15 Ω. The delay angle required to deliver 500 W to the load is _________ (elec. degree).
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Nov 14ESE & GATE EE
