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Power electronics and drives miscellaneous

Power Electronics and Drives

  1. A fully controlled converter bridge feeds a highly inductive load with ripple free load current. The input supply (vs) to the bridge is a sinusoidal source. Triggering angle of the bridge converter is α = 30°. The input power factor of the bridge is ___.

    1. 0.74 to 0.82
    2. 82
    3. 7.4
    4. 74
Correct Option: A

Pin = V s,rms I s,rms cos φ = V0 I0

⇒ cos φ =
V0 I0
[Since I0 = I s,rms ]
V s,rms I s,rms

=
V0
V s,rms

cos φ =
2 √2 Vs
cos30° = 0.779
π
Vs



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