5.2. Three-Phase Half-Wave Thyristor Rectifier
Fig. 5.11(a) presents the power circuit of the three-phase half-wave or sometimes called common-point controlled rectifier. The average output voltage is controlled by the thyristors firing angle. Fig. 5.11(b) presents the waveforms of the under examination rectifier when α = 30° and the output current is assumed to pure dc of 
value. As can be seen from Fig. 5.11(b) each thyristor conducts for one-third of the input voltage period. If the thyristors were replaced by diodes, then the diodes will start conducting at angle ωt = 30° in relation to their corresponding phase voltages van, vbn, and v
value. As can be seen from Fig. 5.11(b) each thyristor conducts for one-third of the input voltage period. If the thyristors were replaced by diodes, then the diodes will start conducting at angle ωt = 30° in relation to their corresponding phase voltages van, vbn, and vGet Power Electronics and Motor Drive Systems now with the O’Reilly learning platform.
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