Bi-directional DC/DC converters support rechargeable batteries
Bi-directional DC/DC converters in the EZA series by TDK now include the EZA2500W-32048. This TDK-Lambda bi-directional DC/DC converter brings the EZA series’ extended high voltage range to 260 to 400V DC and the lower voltage range to 36 to 65VDC. The operating temperature has been increased to -10 to +50 degrees C, adds TDK. Double sided protective board coating and long-life dust resistant fans have also been included.
The EZA2500W-32048, 2,500W digitally controlled, compact 1U power supply is designed for energy storage systems with rechargeable batteries. It can seamlessly change conversion direction from high voltage DC sources, powered by solar or wind, to 48V DC batteries and vice versa, reports TDK. Other applications for the power supply is lithium-ion battery testing and the use of regenerated energy from robots, cranes, autonomous ground vehicles and lifts. The EZA2500 can be used to replace large power resistors currently used for lift braking and are able to use that previously dissipated energy to charge batteries. That stored energy can be used to either provide peak power for high torque demands or as battery back-up for power cuts.
The output voltage and current can be programmed and monitored using the RS-485 communications port. Multiple units can be operated in parallel by using the RS-485 interface to set units for “droop mode” current share. Alarm signals are also accessible, as well as remote on/off and under- and over-voltage functionality. The high voltage (grid) to low voltage (battery) isolation is 3,000V AC, grid to ground 2,000V AC and battery to ground 500V AC.
The EZA2500 measures 43.6mm (1U) high and 423 x 400mm. All models in the EZA series are certified to the IEC/EN/UL 60950-1 and IEC/EN/UL 62368-1 safety standards with CE marking for the Low Voltage, EMC and RoHS Directives. They also carry a five-year warranty.
