Two main types of rectifiers are generally applied at the output of PT ac/dc converters: the voltage doubler (VD)
[Fig. 1(a)] and the current doubler (CD) [Fig. 1(b)]. In the VD, the average diodes’ current is equal to the average load current while in the CD the diode’s current is twice lower than the load current. On the other hand, the peak of the diodes’ voltage in the VD is equal to the load voltage while in the CD the peak of the diodes’ voltage is twice higher than the load voltage. Therefore,for high currents and low voltages (low resistance load) the CD rectifier is a superior choice, whereas for high voltages and low currents (high resistance load) the VD rectifier is a better choice. The problem is, however, that the load regions between these two rectification schemes are not well defined. This paperpresents a comparative analysis of PT based power convertersthat apply these types of rectifiers.
Two main types of rectifiers are generally applied at the output of PT ac/dc converters: the voltage doubler (VD)[Fig. 1(a)] and the current doubler (CD) [Fig. 1(b)]. In the VD, the average diodes’ current is equal to the average load current while in the CD the diode’s current is twice lower than the load current. On the other hand, the peak of the diodes’ voltage in the VD is equal to the load voltage while in the CD the peak of the diodes’ voltage is twice higher than the load voltage. Therefore,for high currents and low voltages (low resistance load) the CD rectifier is a superior choice, whereas for high voltages and low currents (high resistance load) the VD rectifier is a better choice. The problem is, however, that the load regions between these two rectification schemes are not well defined. This paperpresents a comparative analysis of PT based power convertersthat apply these types of rectifiers.
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