Rectifier is the most important role in the telecom power system. The basic conception and the relationship of power factor
current harmonics and EMI for SCR(Silicon Controlled Rectifier) and SMR(Switch Mode Rectifier) at different stage are described. The relative standard are also explained. In the practical point of view
the battery management function involved in the intelligent rectifier is the economic way and reasonable. At last
the good performances of the modified type of DMA10-48V/100A
a three phase power factor corrected SMR are introduced.