Ferrite core based high frequency transformer rectifier (hftr) unit is a high voltage switch mode power supply (smps) unit for electro static precipitator (esp). It supplies a smooth and ripple free high voltage dc into the esp field using the small internal capacitance of the fields. It improves the efficiency of esp than the conventional thyristor controlled tr set. The hftr is powered by a micro-controller based igbt controlled panel. The supply voltage of the panel is 3 phase 415 v 50 / 60 hz. Schematic diagram of the operation as below:
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