Full Wave 3 Phase Bridge Rectifier. Figure 14 14 shows the schematic of three phase controlled rectifier connected with highly inductive load. It is fed from the source a constant 200a to the load consisting of a very large inductance at the output of the rectifier a stream is provided thyristors are triggered at an angle of 30 degrees and the thyristors cut off.
The main advantages of a full wave bridge rectifier is that it has a smaller ac ripple value for a given load and a smaller reservoir or smoothing capacitor than an equivalent half wave rectifier. Figure 14 14 shows the schematic of three phase controlled rectifier connected with highly inductive load. The main reason behind this low fluctuation in output voltage is the usage of large number of diodes.
The inverter and brake chopper are constructed using fast trench igbts suitable for 1200 v.
The brake chopper can conduct 30a 25 c. The waveform of the voltage across the load is shown in black in the figure below. V m phase is the maximum of phase voltage. Above diagram shows three phase full wave uncontrolled bridge rectifier consisting of 6 diodes also commonly called as a 6 pulse rectifier.
