When it is desired to rectify three phase power, one could rectify each of the three phases with the arrangement of four diodes used in single phase, which would require a total of 12 diodes. However, due to redundancy, only six diodes are needed to make a three phase full wave rectifier. Most devices that generate alternating current (such devices are called alternators) generate three phase alternating current <-- please explain to me what is three phase power? what is altenators? and then please give me the tutorials about the rectifier with 12 diodes, and with only 6 diodes, it would be better if the schematic is included