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A 3-phase 6-pulse diode rectifier is shown below with phase sequence R-Y-B. The negative group of diodes (D4, D5, D6) conduct in sequence (from ωt = 0°)

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A 3-phase 6-pulse diode rectifier is shown below with phase sequence R-Y-B. The negative group of diodes (D4, D5, D6) conduct in sequence (from ωt = 0°)

(a) D4-D5-D6

(b) D5-D6-D4

(c) D6-D5-D4

(d) D6-D4-D5

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This key question is from 3P-Diode Rectifiers-2 topic in division Diode Rectifiers of Power Electronics

1 Answer

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by (45.1k points)
The correct option is (b) D5-D6-D4

To elaborate: The conduction sequence always depends on the phase sequence, which diode is conducting will depend upon which phase voltage is active at that moment.

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