Why AI Data Centers Are Adopting ±400V HVDC Instead of Conventional UPS Backup Systems: An ±400V HVDC Power Rack is a modern power delivery and backup system designed to supply high-voltage direct current (HVDC) power at ±400 volts (meaning +400V and -400V relative to ground) directly to servers and IT equipment in AI data centers. This architecture replaces traditional alternating current (AC) power distribution systems and conventional uninterruptible power supplies (UPS), delivering higher efficiency, scalability, and performance to meet the demanding power requirements of AI workloads. 1. Understanding ±400V HVDC: HVDC (High-Voltage Direct Current): Instead of using AC (Alternating Current), the system uses DC (Direct Current) at high voltage levels to power servers. ±400V Bipolar DC Bus: The system has two voltage lines—one positive (+400V) and one negative (-400V)—with respect to a common ground, creating an 800V voltage diff...