AI Server Liquid Cooling Equipment Export: Why EMC Compliance and Power Filters Matter
An analysis from three angles: industry demand, equipment structure, and filter design principles
Yanbixin Technology | Power Supply Filters | Guangdong
AI Server Liquid Cooling | EMC Compliance | Power Filter for CDU
The AI computing boom is driving explosive demand for liquid cooling equipment. China is one of the world's key suppliers, and a large share of its liquid cooling products are exported overseas. This article analyzes why power filters are essential in liquid cooling equipment from three angles: industry demand, AI servers' extreme stability requirements, and the technical structure of liquid cooling systems. It also summarizes the core design requirements these applications place on power filters.
Key Takeaways at a Glance
• Liquid cooling penetration is climbing from about 15% (2024) to over 50% (2027), as single AI racks now draw more than 120 kW.
• Data centers target 99.99% or higher availability — for liquid cooling equipment, one interference event can mean minutes of downtime and major financial loss.
• VFD-driven pumps and compressors create conducted noise (150 kHz–30 MHz) and harmonic current; both need dedicated filtering.
• Export markets demand CE compliance (EN 55014, EN 61000-3-2), FCC Part 15 (US) and, for VFD applications, IEC/EN 61800-3.
• Yanbixin's liquid cooling filter series combines three-phase high-current design, low leakage current and full export certifications.
Liquid Cooling Demand Is Booming — and Export Is the Main Channel
Power consumption per AI server rack keeps climbing. Take the NVIDIA GB200 NVL72 as an example: a single rack draws more than 120 kW. Traditional air cooling can no longer handle the heat. Liquid cooling penetration is accelerating from about 15% in 2024 to over 50% by 2027. Liquid cooling has moved from a “nice-to-have option” to a “must-have” for high-density AI clusters.
• The global coolant distribution unit (CDU) market was worth about USD 2.24 billion in 2025. It is expected to reach USD 7.38 billion by 2034, growing at a CAGR of about 14.3% (source: Fortune Business Insights, July 2026).
• The global data center liquid cooling market was about USD 4.58 billion in 2025. It is projected to exceed USD 44 billion by 2035, growing at a CAGR of over 25% (source: Research Nester, September 2025).
• In China, the liquid cooling server market reached about USD 2.37 billion in 2024, up 67% year on year (source: IDC, April 2025). Cold-plate liquid cooling penetration is rising fast.
On the supply side, the world's main CDU and liquid cooling equipment suppliers include international players such as Schneider Electric, Vertiv, Delta Electronics, nVent, CoolIT Systems and Motivair. Chinese manufacturers, meanwhile, already have a complete cold-plate liquid cooling supply chain, and large volumes of complete systems and components are exported to North America, Europe and Southeast Asia. International tier-one suppliers typically require components to meet strict EMC and reliability specifications — and this requirement is now passing down the supply chain to Chinese component makers.
AI Servers Make Interference Expensive: Why Stability Requirements Are Extreme
Liquid cooling equipment serves the most critical infrastructure in a data center. Its reliability requirements go far beyond consumer products:
• Availability targets: mainstream data centers aim for Tier III/IV levels, with operating availability of 99.99% (“four nines”) or even 99.999% (“five nines”) (Uptime Institute classification). Downtime is measured in minutes per year.
• Liquid cooling is the server's lifeline: if a circulation pump or coolant distribution unit (CDU) fails, server temperature rises quickly, forcing frequency throttling or even shutdown — affecting an entire rack or even a whole server room.
• Interference costs more: electromagnetic interference can make control signals misbehave, sensor readings drift, and variable frequency drives report false faults. In a consumer device, one interference event might just mean a restart. In a data center, it means business interruption and heavy financial loss.
• A sensitive shared environment: liquid cooling equipment shares the same power distribution system as high-density servers, storage and network equipment. Any noise the equipment generates travels along the power lines into other devices on the same circuit.
Liquid cooling equipment must therefore do three things at once: meet its own electromagnetic emission limits, resist interference from the environment, and avoid polluting the data center's power supply. EMC is no longer just a “test item” — it is the entry ticket to tier-one customer supply chains.
Where Liquid Cooling Interference Comes From — and How Power Filters Solve It
The electrical structure of a liquid cooling system determines its electromagnetic behavior. Core loads such as circulation pumps, cooling fans and compressors typically use variable frequency drives (VFDs, or PWM speed control) to adjust flow and cooling capacity on demand. VFDs deliver efficient control, but they also create two classic EMC problems:
• Conducted noise: PWM high-frequency switching generates broadband noise on the power lines, typically in the 150 kHz–30 MHz band. A power filter at the equipment input is needed to suppress it.
• Harmonic current: a VFD is a typical non-linear load. It injects harmonic currents into the power grid, which can distort voltage and disturb other sensitive equipment on the same power distribution system. Reactors or harmonic filtering are usually required to control it.
For liquid cooling applications, filter design should focus on the following principles and key points:
• Split the work: high-frequency conducted noise is handled by the filter network (common-mode and differential-mode suppression); low-frequency harmonics are handled by reactor-type components. The two work differently and must be designed together.
• High current and three-phase: liquid cooling equipment runs at high power levels. The filter must cover large rated currents and three-phase distribution, while balancing size and loss.
• Leakage current control: data centers are sensitive to leakage current. Filter design must balance filtering performance against leakage current — an approach similar to low-leakage designs in medical equipment filters.
• Reliability and temperature rise: liquid cooling equipment runs 24/7. Filters must be designed for long-term temperature rise, component life and safety margins, so they never become the next failure point.
• Standards compliance: for export to Europe, equipment must meet EMC directive standards under the CE framework (such as the EN 55014 series and EN 61000-3-2 harmonic limits). For the US market, FCC Part 15 applies. VFD-based applications may also involve IEC/EN 61800-3.
Yanbixin Power Filters for Liquid Cooling: Built for the Application
Based on our understanding of liquid cooling EMC behavior and data center reliability requirements, Yanbixin has developed a dedicated power filter series for the liquid cooling industry. The design maps directly to the key requirements above:
• Targeted design for VFD-driven loads (pumps, compressors, fans), covering both conducted noise suppression and harmonic control.
• Three-phase, high-current ratings that match the power structure of CDUs and cooling units.
• A balance of compact size and cost, suitable for volume integration by equipment manufacturers (OEMs).
• Certified to UL, TÜV, CQC, CE, RoHS and REACH, covering mainstream export markets.
• Backed by 20 years of filter R&D and manufacturing experience, with free EMC testing and remediation support. We optimize the solution based on measured data, helping equipment makers pass certification faster and enter tier-one supply chains.
Conclusion: EMC Compliance Is the Ticket to Global Supply Chains
The market window for AI liquid cooling equipment is opening fast, and EMC compliance plus reliability is the ticket into overseas tier-one supply chains. Building the filter solution into the equipment architecture at the design stage is more economical and more controllable than fixing problems after tests fail.
[Disclaimer: Some content and accompanying images in this article are sourced from the internet and are intended solely for educational and exchange purposes. If there is any infringement, please contact us for removal; thank you!]
About Yanbixin Technology
Shenzhen Yanbixin Technology Co., Ltd. is a national high-tech enterprise that integrates the research, development, production, EMC & EMI FILTER products.
Over more than ten years of hard work by our team, our products have successively obtained multiple certifications and patents, including cUL/UL, TUV, CQC, CE, CB, ENEC, ROHS, and REACH. We offer a wide range of products with complete specifications, and to ensure quality, we strictly follow the GJB9001C-2017 military standard system in production.
Our company adheres to the principle of 'quality first, integrity-based,' and, based on good communication and coordination, strives to meet customers' needs in technology, quality, price, and delivery. We look forward to your support and to witnessing a win-win together!
Contact Us
Shenzhen Office
Address: Room 23A, Science & Technology Innovation Building, Quanzhi Science and Technology Innovation Park, Bao'an District, Shenzhen, Guangdong Province
Dongguan Factory
Address: Huinian Industrial Park, Yuansan 3rd Road, Xintang Management District, Houjie, Dongguan City, Guangdong Province
Tel: 0755-27147102
Fax: 0755-27147101
Email: laura@yanbixinkeji.com / luna@ybx-emc.com
Official Website: www.emipowerfilter.com / www.ybx-tech.com
EMI/RFIフィルターは何であるか。
EMI filter also called RFI filter is an electrical device/circuit. Can reduce the high-frequency electromagnetic noise on a power line and signal line. This noise is typically in the 9KHz to 10GHz frequency range. And it can degrade or prevent the signal transmissions and/or the intended performance of electrical/electronic equipment. The lower frequency components of the EM noise can impact the power quality as well.
The high-frequency noise is generated by a variety of electrical and electronic devices such as electronic controls, motors, power supplies, clock circuits, inverters, appliances, microprocessors, electronic devices, etc.
3 Phase EMI Filter
Single Phase RFI Filter
EMI Power Filter
EMI/RFI Filter Applications:
Our selection of EMI/RFI power line filters includes single-phase filters and three-phase filters in an assortment of styles and configurations to meet your specific requirements.
Our EMI/RFI filters are assembled, designed, and tested to ensure the best quality and performance for any power line application, including:
Linear power supplies
Medical directive
Modems
Systems with switching power supplies
Surge protection
Hard-disk systems
SMPS with on-board filter
Microprocessors
Computers
Machinery directive
Digital test equipment
Data terminals
Transient suppression
Process control equipment
YBX unmatched design capabilities, innovative solutions, and dedication to customer satisfaction guarantee the highest quality EMI filters for your needs. Our RFI/EMI filters are the best choice for superior power line filter safety, design, and performance.
What is EMI/RFI?
EMI (Electromagnetic Interference) is also called RFI (Radio Frequency Interference). EMI and RFI are the radiation or conduction of radiofrequency energy (or unwanted electronic noise) produced by electrical and electronic devices at levels. That interferes with the operation of adjacent equipment. Frequency ranges of most concern are 10kHz to 30MHz (conducted) and 30MHz to 1GHz (radiated).
Although the terms EMI and RFI are often used interchangeably. EMI is actually any frequency of electrical noise, whereas RFI is a specific subset of electrical noise on the EMI spectrum.
What Causes EMI/RFI?
The most common sources include components such as switching power supplies, relays, motors and tracks. These devices are found in a wide variety of equipment used in industrial, medical, white goods, and building HVAC equipment.
What are the Types of EMI | RFI?
Conducted RFI is released from components and equipment through the power line cord into the AC power line network. This conducted RFI can affect the performance of other devices on the same network.
An Electrical or Electronic Device Emits RFI in Two Ways: Radiated RFI is emitted directly into the environment from the equipment itself.
What are the effects of EMI/RFI on your electrical system?
If you are occasionally experiencing interference with your telephone system, flickering computer monitors, reliability issues with computer networks, instrumentation errors, or misbehaving electronics you are most likely experiencing EMI/RFI in your electrical environment. EMI/RFI can wreak havoc with your electronics, computers, and telephones, making your workplace difficult to work in. Since most machines have control electronic circuits, they may become difficult to control or unreliable.
How do you reduce the effects of EMI/RFI?
Depending on your application, there are many ways to reduce the effects of EMI/RFI. For conducted EMI/RFI, you can choose from a large range of EMI/RFI filters.
What are the Circuit Configurations of EMI | RFI Filters?
Typical types of EMI | RFI filters are designed for a specific type of signal and the devices in which they will be installed. The wide variation in devices and equipment that benefit from EMI filtering necessitates a range of standard solutions, as well as an expanse of customization capabilities. The following are a few types of EMI | RFI Filters.
Three-Phase Filters
Three-phase filters are similar to single-phase filters except that the filter is designed to filter three signal/power lines for three-phase power and motor systems. There are some three-phase filters that also include filtering on the neutral line for applications that require it. Three-phase filters are useful as main input filters for industrial equipment, machine tools, machinery and automation systems. Depending on the leakage performance of a filter, they may even be used with some medical devices and equipment.
Single-Phase Filters
A single-phase EMI | RFI power line filter is designed for AC or DC power lines with a positive or negative, or dual, signal/power path. This type of filter is installed in line with the power/signal lines, allowing DC and AC signals to pass without attenuation, while heavily attenuating signals from 10kHz to 30MHz. These types of filters are used in single-phase motor drives, power supplies, office equipment, and test and measurement equipment, amongst other applications. Some single-phase filters are optimized for specific applications, such as their DC performance, medical equipment requirements, industrial safety requirements, and other standards.
DC Filters
DC filters are designed specifically for filtering DC power and control lines. This could be for protecting solar panels, photovoltaic charging/converting systems, battery charging and conditioning systems, DC motor drives and inverter/converters. Though similar to AC EMI | RFI filters, DC EMI | RFI filters are optimized for passing only DC signals and are typically rated for higher DC voltages and currents. These filters are useful in preventing premature aging and protection of solar panels due to conducted emissions, such as HF stray and leakage currents.
Consisting of a multiple-port network of passive components arranged as a dual low-pass filter, the EMI/RFI filter attenuates radiofrequency energy to acceptable levels, while permitting the power frequency current to pass through with little or no attenuation. Their function, essentially, is to trap noise and to prevent it from entering or leaving your equipment. Selection of the most suitable EMI/RFI power line filter can best be based on the type of power supply or the input impedance of the equipment and the mode of the offending EMI/RFI noise.
騒音抑制におけるEMIフィルターの役割
EMIフィルター
テクノロジーが私たちの日常生活において 重要な役割を果たしている今日の世界では 電気磁気互換性 (EMC) は 個人や企業にとって 重要な問題になっています電気磁気干渉電子機器の正常な機能を妨げる一般的な問題である.しかし,EMIフィルターの登場により,この問題は効果的に対処することができます.EMIフィルター電子システムの電磁互換性を確保し,ノイズを削減し,性能と信頼性を向上させる上で重要な役割を果たします.この 記事 は EMI フィルタ の 役割 に つい て 詳しく 説明 し ます特に騒音抑制と電磁気干渉に対処する.
騒音抑制
EMIフィルターの主要な機能の1つは騒音抑制この文脈では,ノイズとは,電子機器の性能に影響を与える可能性がある電気信号の任意の望ましくない変動を指します.電力線を含む騒音は,伝導または放射性放出として現れ,どちらも敏感な電子機器の正常な機能に有害である可能性があります.
EMIフィルターは,電源と電子機器の間に障壁を提供することで,騒音問題を軽減するのに役立ちます.これらのフィルターはバッファーとして機能します.望まない高周波ノイズを遮断したり吸収したりしながら,望ましい電源信号が通過できるようにする.電子機器が電磁気干渉による障害や不具合なく動作できるようにします
電気磁気干渉
電気磁気干渉(EMI) は,ある電子機器が放出する電磁放射線が他のデバイスの動作を妨害するときに発生します.この妨害は,電子システムの機能を妨害します.機能不全や完全な故障に至るEMI は,オフィスビルや工業施設などの複数の電子機器が近くで動作している地域では特に問題になります.
EMIフィルター電子システムのエントリーポイントにフィルターを組み込むことで,電源接続やデータポートなど,EMI は 効果的に 抑制 できるフィルターは電磁騒音を隔離し,システム全体に拡散するのを防ぎ,電子機器の完全性と信頼性を保証します.
結論
EMIフィルタは,電磁互換性を確保し,電磁干渉の破壊的な影響を最小限に抑える上で重要な役割を果たします.三相アプリケーションこれらのフィルターは,強力なノイズ抑制を提供し,電子機器を外部からの干渉から保護し,電気システムの全体的なパフォーマンスと信頼性を向上させます.EMIフィルタを組み込むことで電子機器の操作が円滑で 妨害がなく できるようにします
私達と連絡してください: +86 18665826908
メール: sales22@yanbixinkeji.com
詳しくは:中国 シェンゼン・ヤンビクシン・テクノロジー・コー 株式会社 連絡先情報 (emipowerfilter.com)
VFD電源フィルターの選び方と取り付け方:選定、取り付け、メンテナンスガイド
VFD 電源フィルターを選んで設置する方法: 選択,設置,保守ガイド
ヤンビキシン技術 電力供給フィルター
VFDフィルター選択 EMIフィルターの設置 インバーターフィルターのサイズ設定
適正な電源フィルターを選択することは,半分に過ぎません.フィルターは,インバーターの電源,電圧,作業環境と一致し,正しくインストールする必要があります.このガイドは3つのことをカバーします:パワー評価で正しいモデルを選ぶ方法重要な仕様に合わせて,フィルタを設置し,維持する方法 VFDの干渉が実際の生産環境で抑制されるようにします.
これは2つのシリーズで2つ目の部分です.第1部 VFDインバーターの干渉は説明されています.原因,リスクと専用EMIフィルターの解決方法 変圧器がなぜノイズを生成し,専用フィルターがどのようにそれを解決するかを説明します.
一見 の 中 で 学ぶ 重要な 点
モデルをインバーター電源に合わせる:ガイド型 (≥11 kW),リード型 (0.75~7.5 kW),統合型 (0.2~2.2 kW).
サイズ決定の原則: フィルター名電流 = インバータ名電流 × 1.5 〜 2.0.
● 単相変圧器では220V,3相変圧器では380V (三相,四線,三線) を合わせます.
■環境が決定する: IP54以上は,塵や油が多い場所.高温モデル (−40°C~125°C) は,暑い環境です.
• 4つの設置規則:信頼性のある接地 (≤4 Ω),距離を短く (≤0.5 m),過負荷をしないこと,スケジュール通りに維持する.
インバーター電力の評価によってフィルターモデルを選択する
専用インバーターフィルターは,それぞれ特定のVFD電源範囲のために構築された3つの主なタイプがあります.
フィルターモデル
互換性
構造
申請
典型的なパラメータ
ガイド型高出力フィルター
3相 VFD ≥ 11 kW
35mm DINレール装着;内蔵された散熱装置を備えたアルミ合金ホース
生産ラインのVFD,高性能モーター駆動システム
定数電流30~100A,交流 380V/480V,IP20
鉛型中高性能フィルター
VFD,0.75×7.5 kW
0.5~1.5mの耐火ケーブル;柔軟な設置,レール不要
機械用 VFD,商業用 HVAC VFD
定数電流515A,交流 220V/380V,IP00
コンパクトフィルター
低功率 VFD 0.2~2.2 kW
コンパクトサイズ;直ぐインバーターの回路板や端板に収まる
小型の速度制御装置,ポータブル VFD
定数電流 1 8A AC 220V / DC 48V
表 1. VFD 定位電源によるフィルターモデル選択
フィルタをキー互換性要件にマッチする
1. インバーター電源と電流によって選択
この単純な式を使えば フィルターの電流量 = インバーターの電流量 × 1.5 〜 20限界は,起動の電波を吸収し,コイルを過熱させない.
実用的な例は2つ.5.5kWの三相駆動器 (電流11A) は1520Aのレールマウントフィルターが必要である.0.75kWの単相駆動器 (電流3.5A) は5Aの鉛型フィルターが必要である.
2. ストレージと干渉強度によって選択
電圧はインバーターと一致しなければならない.単相インバーターは220Vモデルを採用する.三相インバーターは380V3相4線または3線モデルを採用する.正確に電圧をマッチすると,コンデンサが燃え尽きるのを防ぐ.
強い干渉のために,10 MHz帯の2段階フィルタリングモデルを選択します.挿入損失 ≥ 65 dBでは,はるかに強力なノイズ抑制を提供します.
3. 設置環境による保護評価と温度抵抗を選択する
灰塵や油っぽい環境: IP54 以上の密閉式レールマウントフィルター (塵や水への保護のための標準評価) を選択する.密封されたハウジングは,汚れと油が性能を傷つけるのを防ぎます.
熱い環境:−40°Cから125°Cまでの高温モデルを選択します.そのセラミックコアコンデンサターは熱の下で故障に抵抗します.
設置と使用に関するガイドライン
1固定 は 信頼 できる もの で ある べき です
一般モードのノイズは地面に放出されますが,地面経路が固い場合に限ります.フィルターの地面端に,相線と同じ厚さの接地線を使用します: 16 A 下では少なくとも 2.5 mm216~35Aから少なくとも4mm2. 接地線を装置の安全接地端末 (保護接地とも呼ばれます) に接続します.接地抵抗を ≤ 4 Ω に維持します.接地経路が弱い場合は,普通モード抑制は単に失敗します.
2設置距離は,あまりにも遠くではない必要があります.
フィルタをインバーターに近い場所に配置する.フィルターとインバーターの入力端間の推奨距離は≤0.5mである.それ以上は,接続ケーブル自体はノイズを拾い上げ,さらに拡散することができます距離が1mを超えると,出力端にシールド付き,曲がったペアケーブル (シールド内側に曲がった2本のケーブル) を使用し,シールドをその全端 (360°接続) の周りに接地します.
3過負荷状態では決して動作しない.
低電流フィルタと高電源VFDは決して組み合わせてはならない.電流過負荷でコイルが燃え尽き,フィルタが煙を吸い,ドライブ自体が故障する可能性がある.
4定期 的 に 整備 する こと が 必須 です
フィルタ は 面倒 を 見る 必要 が ある 部品 です.シフト 期間 に は 熱 シンク を 塵 から 清掃 し て ください.年 に 一 回 凝電器 の 容量 を 確認 し,その 値 が 20% 以上 低下 し たら すぐ に 交換 し て ください.振動が強い地域ではこの 簡単な 手順 は フィルタ を 何 年 も 安定 し て 置く こと に なり ます.
迅速な買い手チェックリスト
• フィルタのサイズを,インバータの電流の1.5×2.0×にします.
変圧器に電圧と相配置 (220V単相/380V三相) をマッチします.
• 設置環境に基づいて,ハウジング (IP評価,温度範囲) を選択します.
・ フィルタをインバーター入力から0.5m以内に設置し,長距離運転では遮蔽された扭曲ペアケーブルを使用します.
・ 接地 ≤ 4 Ω と 正確なワイヤの厚さ (≥ 16 A 以下の 2.5 mm2; 16 から 35 A 以下の ≥ 4 mm2) を確認する.
• 6 か月ごとにヒートシンクを清掃し,毎年コンデンサータをチェックします.
YBX: 本物 の 問題 を 解決 する 資格 証明書
ヤンビクシンの信頼性は 顧客に実用的な問題を解決する 真の能力から生まれます 認証自体は権威ではありません顧客が最初の試みでテストに合格するのを助けること
目標の市場シェアをより早く
適切に選択され,正しく設置されたフィルターは, 干渉源をコンプライアンスで安定した駆動システムにします. 私たちのフィルターは, UL/cUL, TÜV, CQC, CE, CB, ENEC, RoHS, REACH,そしてすべての製品は ISO 9001 に基づいて製造されています:2015 品質管理システムです. そのため,産業自動化,新エネルギー,医療分野における主要顧客は, Yanbixin を常に,彼らの好ましいフィルターブランドとしてランク付けしています.
ヤンビクシン技術について
シェンzhen Yanbixin Technology Co., Ltd.は,研究開発,製造および電磁互換性 (EMC) と電力フィルターソリューションの販売を統合する国家高技術企業です.献身的な努力を 20年近くかけて,私たちの製品は UL,TÜV,CQC,CE,CB,ENEC,RoHS,REACHなどの認証を取得し,多数の特許を取得しています.詳細な仕様を提示するすべての製品は ISO 9001:2015 品質管理システムに厳格に準拠して製造されています.
専門的な専門知識に根ざし,革新にコミットし,顧客に専門的なコンサルティングとEMC技術修復サービスを提供しています.幅広いクライアントのために多くの技術的な課題を2016年以前,同社は株式コード667344でニュー・フォーース・ボードに上場していた.国内外300以上の上場企業の指定サプライヤーとなった.フォーチュン・グローバル500企業.
効果的なコミュニケーションと調整を通じて, 品質を第一に,誠実さを基礎として,テクノロジーを駆使して 顧客の多様なニーズを満たす努力をしていますお互いの成功を 期待しています
連絡 ください
シェンゼン本部
アドレス:広東省深?? 市バオアン地区,クアンジ科学技術革新公園,科学技術イノベーションビル,23A室
ドングアンの工場
地址:フイニアン工業公園,ユアンサン3丁目,シンタン管理区,ホウジエ,東?? 市,広東省
電話:0755-27147102
ファックス:0755-27147101
メール: laura@yanbixinkeji.com
公式サイト:www.yanbixinkeji.com