Power Electronics - Study Mode

[#141] Once the SCR starts conducting a forward current, its gate loses control over
Correct Answer

(C) Anode circuit current and voltage

[#142] A High speed digital subsystem requires three voltages V 1 , V 2 and V 3 with 1 : 2 : 1 power ratings, respectively. The power supply is designed with the distribute power conversion scheme as shown in the following figure. What is the overall power conversion efficiency?
Correct Answer

(A) $$frac{{4 imes {eta _1} imes {eta _2} imes {eta _3}}}{{{eta _2}{eta _3} + 2 imes {eta _3} + {eta _2}}}$$

[#143] DC choppers belong to the category of,
Correct Answer

(A) DC - DC converter

[#144] A Triac has three terminals viz . . . . . . . .
Correct Answer

(B) Two main terminal and a gate terminal

[#145] How many SCR are to be connected in series with 800 V rating to be used for 3 kV circuit using derating factor of 15%?
Correct Answer

(C) 5