Isolated Bi-Directional DC-DC Converters Benefit Energy Storage Systems
TDK introduce the TDK-Lambda brand EZA11K-320240 bi directional DC-DC converters, suitable for use with energy storage systems. Rated at 11kW, this 1U high product will operate off a 240 – 400Vdc source from a high voltage grid and provide 150 – 300Vdc for charging lithium ion batteries. When grid power is not available, the converter will seamlessly transition to drawing stored energy from the batteries to deliver DC power back to the grid.
The EZA11kW is designed for use in cost-saving peak demand storage systems, emergency back-up power and recycling waste motor braking energy.
The compact EZA11kW measures just 43.6mm high, 422.8mm wide and 530mm deep, and has the highest power density for an isolated bi-directional converter in the industry. Up to five converters can be connected in parallel for larger scale systems. The use of digital control techniques, SiC (Silicon Carbide) MOSFETs and low loss core technology allows the converter to operate with efficiencies of up to 95%.
An RS-485 serial communication interface allows remote adjustment of the voltage and current settings, battery / grid under and over voltage levels and monitoring of alarm signals. Serial connection of multiple converters is possible.
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