-48Vdc/4000A Telecommunications Power supply - Project of 1998

13/07/2012 13:35

The equipment bellow is a -48Vdc/4000A Telecomunications Power Supply is formed of 40 converters of -48Vdc/100A in parallel and with current equalization. This consfiguration with 4 modules in each floor was use by me since 1986 and was adopted in TELEBÁS standards.

The communications system is through a token ring fiber optics network. The technology of the converter is  ZVS-QRC (Zero Voltage Switching - Quasi Ressonant Converter) and PSM (Phase Shift Moulation) controlled . Works in  250Khz and microcontroller controlled

You can see the CININTEL (International congress of telecommunications) Paper at  https://www.energysat.com.br/pagina/cinintel_98.pdf