Loss Calculation

Could anybody tell me how to calculate the conduction and switching losses for a three phase diode bridge rectifier using information from manufacture's datasheets. In this case it is mostly going to be condution losses . I could tons of info on calculating igbt losses but none for calculating the diode losses .

I am kinda of confused , should I include how much input impedance I have , the capacitance in the system .

Could anybody point me in a right direction.

Thanks