论文信息 - THE INSTITUTION OF ENGINEERS SRI LANKA

THE INSTITUTION OF ENGINEERS SRI LANKA

Q2 (a) Give the arrangement of three-phase dual series full-bridge thyristor converter supplied by three-phase DdOyl transformer with equal rms line voltages in the secondary and the tertiary windings. Describe the concurrent switching and sequential switching for this arrangement. (b) For a single three-phase full-bridge thyristor converter sketch the output voltage waveform for the following cases assuming continuous load current and 60° delay firing angle: (i) When the 3-phase input is ideal (ii) When the 3-phase input has an internal inductance (iii) When the 3-phase input is ideal but the upper thyristor in phase-B is burnt (open) [03] [03] [05] [09]

W. H. A. Rupasinghe | A. S. Wickramasinghe | W. Rupasinghe | A. Wickramasinghe

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