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Explore ActionPower's comprehensive range of programmable power and automated testing equipment covering AC/DC, profile emulation and testing sequence automation.
ActionPower combines our advanced programmable power with sophisticated softwares for diverse profile emulation solutions as well as versatile functioning realization.
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The HVDC bus architecture in AI data centers centralizes AC-to-DC conversion at the front end, typically generating 400V or 800V DC distribution rails to supply high-density computing racks. Compared to traditional AC distribution, HVDC topology reduces conversion stages, improves system efficiency, and enables higher power density at rack level. However, this architecture also introduces new technical challenges, including high-voltage insulation coordination, dynamic bus stability under rapid load transients, dual-source redundancy validation, and protection selectivity across multiple power stages.
To ensure reliable deployment, comprehensive bus-level validation is required. This includes programmable AC source simulation for front-end rectifier testing, precision power measurement for efficiency and harmonic verification, controlled over-voltage injection for protection logic validation, and high-power DC load emulation to reproduce real rack demand conditions. ActionPower’s regenerative AC/DC platforms enable full-scale HVDC bus emulation up to megawatt levels, ensuring both steady-state and transient performance are validated under realistic data center operating scenarios.
At the rack level, HVDC architecture transitions from high-voltage DC distribution (400/800VDC) to low-voltage server rails (48–50VDC) through high-efficiency DC/DC converter modules. These converters operate under extreme power density constraints and must maintain tight voltage regulation despite aggressive load steps from AI accelerators and GPU clusters. Key technical challenges include fast transient response, current sharing in parallelled modules, thermal stability under continuous high load, and protection coordination at module and shelf levels.
Effective server-level validation therefore requires programmable HVDC bus emulation combined with high-speed electronic load profiling to replicate dynamic computing workloads. Over-voltage injection, ripple and noise measurement, and digital communication monitoring are essential to verify both electrical performance and protection behaviour. ActionPower’s bidirectional DC sources and high-power electronic load systems provide scalable test configurations for module-level (10–30 kW) and rack-level (100+ kW) DC/DC validation, enabling accurate reproduction of real AI data center power environments.
ActionPower’s expansion into AI data center testing is supported by over three decades of experience in high-power electronics and grid-level regenerative test systems. Our expertise includes high-voltage DC regulation, four-quadrant power control, transient load profiling, harmonic measurement, and protection logic verification. By applying these mature power platforms to HVDC architectures, we can quickly deliver configurable test systems capable of validating bus stability, module current sharing, and dynamic response under realistic AI computing load conditions.
Scalable system for emulating utility input towards HVDC's front-end offering parallel connection and multiple output options replicating dual AC input.
High-power tower type sysetm matching the front-end testing requirements for large-scale AI data center offering consitent response and precision at MVA level.
HVDC architecture DC bus emulation with power range covering module-level and upto rack and system-level dynamics testing applications.
OVP fault injection with precise voltage control. Conduct controlled over-voltage conditions to validate protection thresholds and response behavior.
Server load emulation with high-speed transient capability, enabling accurate reproduction of real-time workload variations in AI server environments.
Large-scale data center server emulation NEXUS provides scalable high-power DC capability to reproduce realistic rack-level operating conditions.
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