November 2016
Intermediate to advanced
1008 pages
27h 59m
English
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4.6. Twelve-Pulse Diode Rectifier
Fig. 4.14 presents the power circuit of a 12-pulse rectifier topology consisting of two 6-pulse rectifiers and a Y-Y-Δ transformer. It should be pointed out, that the voltages in the delta-connected secondary winding exhibit a phase difference of 30° with respect to the star-connected winding voltages. It should be noted that in order for the two secondary windings to have the same line-to-line voltages, the turns ratio between the two secondary windings must satisfy the equation 
.
.The 12-pulse rectifier when compared to the 6-pulse rectifier exhibits the following advantages:
• The average value of the maximum ...
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