A three phase diode bridge rectifier has used for high power

A three phase diode bridge rectifier has used for high power application. This circuit has used for
full wave rectifier circuit. This circuit has driven for firing angle 120 degree. The conduction
sequence for diode is .
It can obtain by marginally common cathode and common anode configuration.
In full wave rectifier two diode are there for conduction ,one group is top which is subjected to
more positive voltage another from bottom group which is subjected to more negative voltage at
any time of load is connected between two phase wire and its subjected to line voltage.
The output waveform consists of 6 pulses for every input cycle ,so it’s know as three phase six
pulses rectifier. Hence the output frequency is six times of supply frequency.
Therefore, the voltage sequence has shown below. Duration of each pulse is 60 degree and
conduction time is 120 degree.
a)
Determine the
The average output voltage.

The peak instantaneous output wave form has shown in figure 1.
b)
Determine the rms output voltage.
The bridge rectifier diode circuit has restive load has shown in below.
Determine the RMS current of diode circuit.

c)
Determine the
Therefore, has peak to peak secondary current, hence the RMS current has shown in below.