Pfc - Dc/Dc Module (A14, A15 And A16) (5161273) - Ametek CSW5550 User Manual

User Manual

4.8 PFC - DC/DC Module (A14, A15 and A16) (5161273)

There is one PFC–DC/DC module for each of the three phases. This module consists of a PFC
and DC to DC converter assembly. One PFC-DC/DC module is associated with one output
amplifier. One set is used for each output phase.
The PFC assembly controls the input power factor to be 0.99. One phase of the 3-phase AC line
input is applied to the input of each module. The AC line is converted to a raw 380 Vdc bus. The
bus is then delivered through a soft-start relay to the FPC circuit which consists of a boost
converter. The output from the PFC is a regulated 380 Vdc bus that is delivered to the DC/ DC
converter.
The DC/DC converter performs two functions. It isolates the line input from the high power DC
outputs used for the output power amplifier. It generates two 290 Vdc buses for the applicable
amplifier. The converter also generates an isolated 48 Vdc bus used for the power source
Auxiliary Power supply. The 48 Vdc bus from each of the PFC-DC/DC modules is connected in
parallel for a redundant supply.
CSW Series
California Instruments
107