In a three phase (50Hz) full converter, the ripple frequency in output voltage?

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ISRO (VSSC) Technical Assistant Electrical 2016 Official Paper
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  1. 50 Hz
  2. 100 Hz
  3. 150 Hz
  4. 300 Hz

Answer (Detailed Solution Below)

Option 4 : 300 Hz
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Detailed Solution

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Concept:

Ripple frequency at the output = m × supply frequency

fo = m × fs

Where m = types of the pulse converter

Calculation:

A three-phase full-wave AC to DC converter is a 6-pulse converter

Number of pulses (m) = 6

fo = 6 × supply voltage frequency

∴ f= 6 x 50

f0 = 300 Hz

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