GoHz is a manufacturers-based online shop in AC power supply industry to provide solutions for changing regular grid power frequency (50 Hz, 60 Hz), DC power source to adjustable frequency & voltage source. Solid state pure sine wave frequency converters, variable frequency drives, inverters etc. are for sale in affordable price on

First you decide the 3 phase load and work backwards to decide the current capacity of the Thyristors and blocking diodes. The control and firing circuits are having low current devices and are readily available in the form of microchips. The 50Hz/ 60Hz frequency converters are also available and go ahead with the help of your University guide.