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Power electronics and drives miscellaneous

Power Electronics and Drives

  1. A single-phase bridge converter is used to charge a battery of 200 V having an internal resistance of 0.2 Ω as shown in the figure given below. The SCRs are triggered by a constant dc signal. If SCR 2 gets open circuited, then what will be the average charging current?

    1. 23.8 A
    2. 15 A
    3. 11.9 A
    4. 3.54 A
Correct Option: A

Average current is given by,

=
1
[2Vm cosθ - E(π - 2θ1)]
2πR

where , θ1 = sin-1
E
Vm

= sin-1
200
= 38° = 6.66 rad
230 √2

Then , Iavg =
1
2π × 2

Iavg =
1
[2 √2 × 230 cos38° - 200(π - 2 × 0.66)] = 11.9
2π × 2



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