Question
Download Solution PDFWhat is the ripple frequency of 415 V, 50 Hz, 3-phase full wave rectifier
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
If input supplied frequency is ‘f’ then output ripple frequency of ‘n’ pulse converter is ‘nf’
Output ripple frequency = Number of pulse converter × input supply frequency
f0 = n⋅f
Consider 1-pulse converter (half-wave rectifier), the output voltage waveform is shown below (n = 1)
Consider 2-pulse converter (full-wave rectifier), the output voltage waveform is shown below (n = 2)
For 6 pulse converters (p = 6), the output voltage waveform is
Similarly, for n pulse converter output ripple frequency is ‘nf’.
Note: With the increase in pulse number, the output ripple decreases.
Calculation:
Given rectifier is a 3-phase Full-wave rectifier. It is a 6 pulse rectifier.
Therefore, the ripple frequency = 6f
Supply frequency = 50 Hz
Ripple frequency = 6 × 50 = 300 Hz
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