PDF 原檔：報告_OCP2026_致茂_AI電源機櫃驗證_20261015_original.pdf
講者公開簡報（OCP 官方 Recorded Content 頁提供下載）。文字以 PyMuPDF 逐頁抽取，
### p<n>為頁碼；圖表內容見原檔。
圖片清單（已驗證 2026-10-19）
| 檔名 | 頁 | 分類 | 親眼所見內容 |
|---|---|---|---|
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p3.png |
p3 | 真資料圖 | 高功率電源機櫃測試架構圖：AC 電源（1~N）→ 受測 Side Car Power Rack → 高速 DC 負載（1~N），並列電網擾動波形、≥160% 峰值負載與 EDPP 10kHz 波形 |
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p12.png |
p12 | 真資料圖 | 混合式再生 DC 負載示意：1000kW 負載中約 800kW 回灌電網、僅 250kW 由電網補，穩態效率高於 80%，並可跑 ≥160% 峰值與 10kHz EDPP 動態 |
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p13.png |
p13 | 真資料圖 | 致茂三款 DC 電子負載比較表：高速 63200A（線性，slew >20A/μs、低漣波 20mV、無能量回收）、再生 62000D（回收 >90%、slew 約 30A/ms 較慢、漣波 150mV）、混合 63700H（回收 >80%、slew >20A/μs、漣波 150mV、無短路功能） |
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p17.png |
p17 | 真資料圖 | 低漏感匯流排實物照：左為擋住出風口的不良匯流排設計，中為致茂專利低電感匯流排（NP-40191-TW），右為 60 台電子負載 1.44MW 的實際現場 |
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p20.png |
p20 | 真資料圖 | Validate the Rack Before Compute Trays Arrive：Server Load Emulator 1U 水冷 15kW、80V/300A 外觀照；左為標示 Busbar／Power shelf／CDU 的機櫃示意；右側狀態表 Power shelf、Busbar/PDU、External CDU、Rack control 均 Ready，Compute trays Unavailable，結語「驗證排程不能等」 |
報告_OCP2026_致茂_AI電源機櫃驗證_20261015_p22.png |
p22 | 真資料圖 | SLE 組成整櫃驗證：機櫃內疊放多台 SLE 以銅排連接並接水冷，旁為外部 CDU；文字寫明 30 台以上同步、機櫃超過 300kW，驗證 power shelf、busbar/PDU、CDU、rack control |
原始內容
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0 Validation Challenges for Next-Generation AI Power Racks: From 100kW to MW Scale
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1 AI Server Power and Battery Backup Unit (BBU) Test Solutions Chroma has been providing testing solutions for power supplies and batteries for 40 years. We are also committed to providing power testing solutions for AI servers. Power Supply Unit (PSU) Battery Backup Unit (BBU)
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2 DUT Power: Side Car Power Rack Power requirements are increasing, from hundreds kW to MW levels. ……… Performance Testing 1 N ~ AC Power Source 1 N High Power Rack Test Architecture Input Output ……… ……… High-Speed DC Load ~ ≥160% Peak Load EDPP : 10kHz Power Line Disturbance
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3 Building an MW-Class Power Test Lab
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4 MW Lab Overview Purpose : As AI server power moves toward the MW class, build a test lab that can validate HVDC high power supplies Test Scale : A single Power Rack of 900 kW-MW; megawatt-class (>1000 kW) heat output must be handled effectively Core Equipment : DC Electronic Load, AC Source, DC Source arrangment Three Key Challenges : Cooling / Site power shortage / Megawatt-class equipment control & connection Power Rack Cooling Site power shortage MW equipment control & connection
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5 Challenge: Equipment Cooling Calculating heat and airflow for equipment air-cooling (top exhaust) 25℃ Cold air 2080CFM 4000CFM *AI-generated image for illustrative purposes only. 25℃ Cold air AC source 100kW DC Load 72kW
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6 Thermal Management and Airflow Arrangement Separate hot & cold zones; exhaust hot air outside to prevent recirculation Equipment far from vents can use top exhaust Cold air Hot zone Hot air Power Rack Partition 25℃ Cold air 4000CFM Cold zone
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7 Thermal-Flow Analysis CFM / Thermal-Flow Simulation Based on the actual site's HVAC specs and test-equipment layout, Chroma can perform a complete thermal-flow simulation and analysis. Site Equipment Operating Thermal-Flow Analysis Megawatt-class equipment CFM requirements: Electronic Load: >13 load cabinets x 4,000 CFM = 52,000 CFM AC Source: >12 units x 2,080 CFM = 24,960 CFM
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8 From Air to Liquid Cooling Rear Door Heat Exchange Solution When the laboratory cannot provide sufficient airflow and heat dissipation, this air-water exchange cooling solution can be used, utilizing the existing chilled water piping for heat removal. CDU DC Load Simulated DUT CDU + DC Load with RDHx (Rear Door Heat Exchange)
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9 Building an MW-Class Power Test Lab (Power Shortage)
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10 Challenge: Insufficient Building/Site Power Feeds test energy back to the grid for recycle, with efficiency above 90% Regenerative DC Electronic Load Regenerative Load 1000KW 150KW 900KW Solves site power shortage issues Lowers indoor environment temperature Saves test energy cost Ideal applications for regenerative loads Long-duration endurance testing Reliability testing Burn-in testing Battery discharge testing Regenerative Load 1000KW
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11 Challenge: Insufficient Building/Site Power Hybrid Regenerative DC Electronic Load ≥160% Peak Load Also feeds test energy back to the grid, with steady-state efficiency above 80% Hybrid Load 1000KW 250KW 800KW 1000KW Combines the advantages of linear Load (high speed) and regenerative loads. Meets pulsed load-current testing (Dynamic / EDPP / Peak Load) EDPP : 10kHz Dynamic
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12 High-Speed / Regenerative / Hybrid DC Load Chroma DC Electronic Load High-Speed 63200A Regenerative 62000D Hybrid 63700H Topology Linear Regen (Switching) Hybrid (Linear + Switching) Benefits High slew rate >20A/μs Low ripple(20mV) Peak Power function High regen efficiency
90% High power density High slew rate >20A/μs High regen efficiency 80% Peak Power function Drawbacks No energy recovery (0%) High cooling demand Slow slew rate >30A/ms High ripple(150mV) High ripple(150mV) No short function
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13 Building an MW-Class Power Test Lab (Equipment Control & Connection)
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14 Challenges of Synchronously Controlling Multi Load Units Recommend the dynamic synchronization error be under 2us. Supports synchronized control of 60+ load units, with total sink power up to 1.44MW or more Multiple electronic loads are connected in parallel to test high-speed dynamic current. If precise synchronous control cannot be achieved, the slew rate will slow down and fail to meet the testing requirements.
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15 Excessive cable inductance degrades DC load dynamic capability. Challenge: Wiring Inductance It causes problems: Current overshoot Current rise time Settling time Overshoot current
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16 Professionally Designed low-inductance Busbar busbar High current path, heat generation, inductance, and parasitic capacitance must be considered. 60 E-Load units, 1.44MW NP-40191-TW bad busbar design blocks the air outlet Chroma Patented low-inductance busbar
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17 Custom-Designed Load-to-DUT Busbar Custom connection busbar Custom connection busbar Custom connection busbar Power Rack output-interface connection challenges: Inductive-impedance heating & meltdown HVDC high-voltage arcing & leakage Currents of thousands of amperes
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18 More Realistic Power Supply and Thermal Testing of AI server Racks: Server Load Emulator
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19 Validate the Rack Before Compute Trays Arrive Server Load Emulator: 1U high, 15kW water-cooling, 80V/300A. Power, distribution, control and cooling systems are often ready before the AI compute hardware. RACK INFRASTRUCTURE READY COMPUTE TRAYS NOT AVAILABLE POWER SHELF Ready BUSBAR / PDU Ready EXTERNAL CDU Ready RACK CONTROL Ready COMPUTE TRAYS Unavailable The validation schedule cannot wait. CDU Power shelf Server Load Emulator Busbar
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20 Reproduce Real Server Power Behavior Convert measured AI server Power profiles into a repeatable, programmable physical load model. REAL SERVER → CAPTURE PROFILE → REPLAY WITH SLE DYNAMIC LOAD Fast workload transitions < 20us PEAK EXCURSION 24kW (160%) for 200 ms WAVEFORM REPLAY Measured current profile THERMAL EMULATION Liquid + air-cooled load Not just power consumption, Power behavior.
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21 From One Server Model to a Complete Rack Synchronize Server Load Emulators to validate power and cooling as one system. VALIDATE THE COMPLETE RACK ✓Power Shelf Regulation, sharing, protection ✓Busbar / PDU Current capacity, voltage drop ✓External CDU Flow, temperature, heat rejection ✓Rack Control Sequencing, telemetry, recovery
30 synchronized units | > 300kW @ Rack SERVER 1 SLE › RACK SLE × N › CLUSTER Rack × N › POWER HIL A scalable validation methodology for AI Power infrastructure.
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22 From MW-Class Test Lab to Rack-Scale Validation Four principles for validating next-generation AI power infrastructure • VALIDATE THE COMPLETE SYSTEM Integrate power, distribution, cooling and control validation. • ENGINEER THE TEST LAB AS ONE PLATFORM Plan cooling, site power, synchronization and connections together from the beginning. • SELECT THE RIGHT LOAD ARCHITECTURE Balance dynamic performance, energy recovery and site constraints. • CLOSE THE VALIDATION GAP WITH SLE (Server Load Emulator) Reproduce real server power and thermal behavior and scale from server to rack and Power HIL SIMULATE THE SERVER. VALIDATE THE RACK. SCALE TO THE DATA CENTER.
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23 Copyright © 2023 Chroma ATE Inc. All rights reserved. Thank You This presentation is provided solely for technical explanation and discussion of industry trends. Any third-party company names, brands, trademarks, product names, product appearances, and related images appearing herein are the property of their respective owners; their presentation does not imply any partnership, license, endorsement, agency, or affiliation between our company and such third parties. Without our company's written consent, this presentation may not be reproduced, distributed, publicly disclosed, or used for any other commercial purpose.