Powering the AI Factory: The Transition from AC to 800 VDC Architecture

AI rack power is rapidly moving from tens of kilowatts towards hundreds of kilowatts and, ultimately, megawatt-scale systems. This evolution is challenging conventional AC distribution architectures and accelerating the transition towards facility-level 800 VDC power distribution.

 

This technical white paper examines the role of the Transformer Rectifier Unit (TRU) as an efficient and proven approach to centralized DC power conversion. It compares TRU and solid-state transformer architectures and considers efficiency, reliability, component count, CAPEX, scalability and integration with energy storage.

 

Based on AEG Power Solutions’ experience with passive multi-pulse DC3 and active front-end DC4 rectification technologies, the paper also looks ahead to the potential evolution towards 1500 VDC architectures for future gigawatt-scale AI factories.

 

The complete white paper is available on the HPS website.

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