The filer for aluminum electrolysis and conventional filter are identical in terms of equipment composition

while form the design perspective

the former has its special side

namely

the power factor of rectifier load calculation

harmonic number calculation

multiple effect calculation and so on will directly affect the quality and cost of the filter and is more important than filter circuit parameters calculation. In this paper

the design essentials

design flow and calculation contents of such filters are summarized from the design point of view

the corresponding calculation methods are established

and the importance of multiplicity in filtering effect evaluation is proposed.