Core Classifications and Technical Differences of DC UPS

Based on voltage level, technical architecture, and application scenarios, DC uninterruptible power supplies (UPS) are mainly divided into three categories. Each category differs significantly in performance parameters and applicable scenarios, allowing for targeted selection.

1. Low-voltage DC UPS (≤48V) The mainstream voltage level is ±48V. It is primarily suitable for scenarios such as 5G communication base stations and small communication equipment rooms, powering communication equipment such as BBUs and RRUs. These products adopt a modular design, with a single module output current of up to 100A and a power density of 65W/in³. They feature AI dynamic current sharing technology, with current distribution accuracy between parallel modules at ±1%, preventing single-module overload. Some high-end models use sixth-generation silicon carbide (SiC) power devices, achieving a full-load efficiency of 99.5% and a half-load efficiency of 99.2%, significantly reducing energy consumption.

2. Medium and High Voltage DC Uninterruptible Power Supply (240V-400V)
Covering voltage levels of 240V, 336V, and 400V, this system is specifically designed for data centers and cloud computing centers, adaptable to IT loads such as servers and storage devices. It adopts an "AC-DC" single-conversion architecture, eliminating energy loss in the inverter stage, achieving an overall efficiency exceeding 97.5%, maintaining efficiency above 97% at 10%-100% load rates, significantly reducing the PUE value of data centers. It supports N+X redundant parallel operation, requiring no synchronous control, and seamless switching in case of single-module failure, achieving system availability of over 99.999%.

3. High Voltage DC Uninterruptible Power Supply (10kV and above)
Designed for high-power scenarios such as large data centers and new energy power plants, this system adopts a 10kV AC input design, optimizing the traditional power distribution link's medium-voltage isolation cabinet, transformer cabinet, low-voltage distribution cabinet group, and high-voltage DC cabinet into an integrated system, increasing power density to 3.6 watts per cubic centimeter. The core adopts a phase-shifted interleaved parallel topology and multi-magnetic-circuit coupled transformer design technology, with a full-load total current harmonic distortion (THDi) of less than 3%, effectively reducing pollution to the power grid, and the power of a single system can reach more than 1.2 megawatts.