格隆汇12月5日丨美信科技(301577.SZ)在投资者互动平台表示，公司与台达建立了长期良好的合作关 系，主要向其提供磁性元器件产品。 ...

Summary of Solid-State Transformer Industry Conference Call Industry Overview - The solid-state transformer (SST) industry is experiencing continuous catalysis, particularly in North America and China, with significant developments expected from late 2026 to early 2027, leading to small batch orders and large-scale applications by 2028 [2][16]. Key Points and Arguments - **Core Drivers for Data Center Power Supply Upgrade**: The rapid increase in server power necessitates a simplified power supply circuit due to the limitations of traditional methods, which are space-consuming, inefficient, and generate excessive heat [1][3]. - **Optimization Methods**: Data center power supply systems can be optimized by reducing the number of front-end devices and increasing voltage, which lowers current and heat generation. The SST technology can replace traditional transformers and rectifiers, offering multiple output voltages [5][6]. - **Efficiency Advantages**: SSTs can achieve an overall efficiency of 95%-98%, compared to 90%-95% for traditional HVDC systems, significantly impacting project profitability [6][16]. - **China's Leading Position**: China is ahead in SST applications compared to Europe and the US, with significant adoption in research and demonstration projects by state-owned networks [7][12]. - **Recent Developments**: Key events include Google's proposal for a 400V system, NVIDIA's plans for 800V HVDC, and partnerships like Qinhuai's collaboration with Meituan for commercial SST solutions [8][16]. Competitors and Market Landscape - **Major Competitors**: Key players in the SST market include Delta, Eaton, Schneider, and Weili, with Delta leading in product development and partnerships [11][12]. - **Chinese Companies**: Notable Chinese firms such as Xidian, Sifang, and TBEA are gaining traction, with successful applications in state network projects and ongoing product iterations [12][15]. Industry Trends - **Performance and Cost**: SSTs are positioned as the ultimate power supply solution, offering competitive costs and strong economic viability [13][16]. - **Global Market Entry**: Chinese companies are expected to capture significant market shares in North America, either directly or through ODM partnerships [14][16]. - **Increasing Demand**: The rising power density of server components is driving the demand for high-power density products, making SSTs a necessary choice [14][16]. Key Factors for Future Development - **Performance and Cost Advantages**: These will solidify SSTs as the preferred power supply solution [16]. - **Technological Leadership**: China's technological edge will facilitate entry into international markets [16]. - **Growing Demand**: The increase in server power density will further propel the industry [16]. This comprehensive overview highlights the solid-state transformer industry's current state, competitive landscape, and future prospects, emphasizing the importance of ongoing developments and market dynamics.

Core Viewpoint - The company confirmed that Delta, an important customer, supplies power PCB to Google, indicating a significant relationship with major cloud service providers [1] Group 1 - Investors inquired about the relationship between the company and Delta regarding power PCB supply to Google [1] - Delta's product application areas cover numerous downstream cloud manufacturers, including Google [1]

Core Insights - The announcement of the world's first intelligent DC power supply system based on SST (Solid State Transformer) was made at the 2025 CDCC SUMMIT, showcasing a collaboration between Delta, Meituan, Qinhuai Data, and Dongyangguang [1] - The SST solution integrates multiple layouts from Dongyangguang's supply chain, featuring its self-developed layered foil capacitor group, which breaks through efficiency limits and will first be implemented at the Qinhuai Data industrial park to support Meituan's operations [1] - The acquisition of 100% of Qinhuai Data's China business by Dongyangguang in September 2023 marks a significant step in optimizing industry layout and accelerating AI strategic transformation [1] Industry Challenges and Solutions - The power density of data centers is facing unprecedented challenges as AI applications expand, necessitating a shift from traditional AC distribution systems to more efficient solutions [2] - The SST technology is considered the "holy grail" for next-generation data center power supply, achieving an industry-leading efficiency of 98.5% and a power output of 1MW in just 1 square meter, reducing space requirements by over 50% compared to traditional solutions [2] - The SST system employs a "distributed SST + DC bus" architecture, significantly lowering transmission losses and integrating energy storage units for seamless switching between power sources [2] Technical Innovations - Dongyangguang's layered foil capacitor is crucial for stabilizing the input-side DC bus voltage in the SST solution, enhancing the system's performance [3] - Compared to traditional capacitors, Dongyangguang's layered foil capacitors have improved volumetric efficiency by over 40% and capacity density by over 30% [3] - The environmental benefits of this technology are notable, with a 40% reduction in aluminum consumption compared to traditional capacitors, aligning with the "dual carbon" strategy [3] Market Opportunities - The integration of Qinhuai Data and Dongyangguang's core components is expected to create a unique competitive advantage in the digital economy, facilitating the development of next-generation data centers with lower PUE and higher power density [4][5] - The global market for SST in AI data centers is projected to reach 100GW by 2030, with the layered foil capacitor market potentially reaching 2 billion yuan [5] - Dongyangguang's high-capacity layered foil capacitors are becoming the preferred solution for AI server power supply units, addressing the increasing demand in the AI computing market [5] Strategic Developments - The capital operation to integrate Qinhuai Data and the technological advancements in layered foil capacitors are helping Dongyangguang build a comprehensive ecosystem for AI energy solutions [6] - The ongoing projects with Qinhuai Data and Meituan are expected to lead to a re-evaluation of Dongyangguang's value in the AI infrastructure sector [6]

Core Viewpoint - Nvidia has introduced an outdoor DC solution to address the increasing power density issues in cabinets, effectively reducing power loss [1] Group 1: Nvidia's Proposal - Nvidia proposed an 800VDC outdoor solution, utilizing medium-voltage rectifiers or solid-state transformers (SST) as the ultimate solution [1] - The high-voltage direct current (HVDC) system is referenced as a future power supply solution, driven by the exponential growth in computing power demands [1] Group 2: Efficiency of Medium-Voltage Rectifiers and SST - Medium-voltage rectifiers convert medium-voltage AC (typically 1kV to 35kV) directly to DC, achieving over 98% efficiency and reducing footprint [2] - Solid-state transformers combine power electronics with high-frequency transformer technology, also achieving over 98% efficiency [2] Group 3: Market Commercialization Progress - Leading companies are advancing HVDC technology domestically and internationally, with Alibaba starting tenders in 2018 and Tencent planning for 2025 [3] - Internationally, Meta's Prometheus project may tender in 2026, while Google is promoting ±400V standardization [3] Group 4: Industry Chain Differences - The core difference in the industry chain lies in the transformers used, with medium-voltage rectifiers utilizing phase-shifting transformers and solid-state transformers using high-frequency transformers [4]

Core Insights - Nvidia has introduced an 800VDC external solution to address the increasing power density issues in cabinets, effectively reducing power loss [1] - The report emphasizes the benefits for terminal manufacturers, the significance of transformers, the growth potential for Delta Electronics as a PCB supplier, and the importance of changes within cabinets [1] Group 1: Nvidia's Proposal - Nvidia's high-voltage direct current (HVDC) system is proposed as a future power supply reference, with medium-voltage rectifiers and solid-state transformers (SST) as ultimate solutions [1][2] - The hardware technology direction of Nvidia is evolving towards efficiency and speed, with the HVDC system addressing the exponential growth in GPU computing power and power density [1] Group 2: Efficiency and Market Trends - Medium-voltage rectifiers convert medium-voltage AC (typically 1kV to 35kV) directly to DC, achieving over 98% efficiency and reduced footprint compared to traditional UPS and HVDC solutions [2] - Major companies, both domestically and internationally, are advancing HVDC technology commercialization, with notable initiatives from Alibaba, Tencent, Meta, and Google [3] Group 3: Industry Chain Dynamics - The core distinction in the industry chain lies in the transformers used, with medium-voltage rectifiers utilizing phase-shifting transformers and solid-state transformers employing high-frequency transformers [4]

Core Insights - Solid-State Transformers (SST) are leading innovations in power transmission and distribution, utilizing power electronics and high-frequency electromagnetic induction principles [1][2] - China has established a well-defined vertical industry chain for SST, with upstream focusing on wide bandgap semiconductors and soft magnetic materials, midstream on modular manufacturing, and downstream on applications in smart grids and data centers [1][6] - The SST industry is transitioning from technology validation to large-scale commercialization, driven by AI computing power and energy transition, despite facing technical bottlenecks [1][12] Industry Overview - SST, also known as Power Electronic Transformer (PET), replaces traditional transformer components with semiconductor devices to achieve voltage transformation and electrical isolation [2][3] - The main types of SST include AC-SST, DC-SST, and Hybrid-SST, each serving different applications from smart grids to data centers [4][5] Cost Structure - The cost structure of SST is heavily concentrated in upstream components, with power electronic devices accounting for approximately 40% of costs, followed by high-frequency transformers, structural cooling, and control systems each at about 15% [8][10] Market Dynamics - The demand for SST is rapidly diversifying, primarily driven by global energy transition and digital infrastructure development, with AI data centers being the largest application segment [11][12] - The Chinese silicon carbide (SiC) market is projected to grow from approximately 1.6 billion yuan in 2024 to 1.91 billion yuan in 2025, indicating strong growth potential [10] Development Status - The SST industry in China is at a critical stage of transitioning from technology validation to commercialization, with challenges including high costs and lack of standards [12][13] - Major companies like China Xidian and TBEA are leading the market, with significant shares in high-end applications [15] Future Trends - The industry is expected to see breakthroughs in material performance and technology, leading to cost reductions and performance improvements [16] - Application scenarios are anticipated to expand from data centers and smart grids to electric vehicle charging and industrial applications [17] - The competitive landscape will evolve, emphasizing technology, capital, and supply chain capabilities, with a focus on domestic material sourcing [18]

Core Viewpoint - Weigao (301251.SZ) emphasizes its ongoing technological advancements in the power supply sector and highlights Delta as a significant client [1] Group 1 - Weigao is continuously updating and breaking through in power supply technology to keep pace with market developments [1] - Delta is identified as an important customer for Weigao [1] - Detailed information regarding product production levels, application areas, and customer product specifics can be found in the company's publicly disclosed announcements [1]

Core Viewpoint - Solid State Transformers (SST) are expected to become the ultimate solution for AIDC power management due to their high efficiency and low footprint, with Delta's 800V SST system reaching MW-level capacity and Nvidia planning full deployment of its 800V high-voltage direct current architecture by 2027 [1][2]. Group 1: Industry Trends - Data centers are moving towards higher power levels, with power supply system efficiency becoming crucial as single cabinet power has increased from 8KW to over 30KW, and Nvidia's single cabinet power reaching 120KW [2]. - Traditional DC distribution methods are facing bottlenecks due to space limitations, copper overload, and low conversion efficiency, necessitating a new power supply architecture [2]. - In typical AIDC projects, power-related equipment costs account for nearly 50% of total costs, indicating high value and continuous iteration [2]. Group 2: SST Advantages - SST achieves high efficiency by replacing traditional transformers with high-frequency power electronics, allowing for system efficiencies of up to 98% [3]. - SST's modular design significantly reduces equipment size by approximately 40%, integrating rectification, conversion, and inversion processes [3]. Group 3: Market Opportunities - The 800V HVDC is seen as a starting point for SST penetration, offering active flexibility and green electricity adaptability, which can open broader application markets [4]. - SST can actively control power quality, addressing grid disturbances and load fluctuations, while also supporting bi-directional power flow [4]. - The new grid architecture using SST can accept 50%-70% renewable energy, improving performance by 1.3-2 times compared to traditional grid structures [4]. Group 4: Related Companies - Key players in SST systems include Sifang Co., Ltd. (601126.SH), China XD Electric (601179.SH), Jinpan Technology (688676.SH), and Xinte Electric (301120.SZ) [5]. - Companies involved in SST materials include Keli (002782.SZ) and Yunlu Co., Ltd. (688190.SH), with products covering a wide frequency range [5].

Investment Rating - The report provides a "Buy" rating for the companies involved in the AIDC power management solutions and SST technology [8]. Core Insights - The data center industry is transitioning to higher power levels, with cabinet power increasing from an average of 8KW to over 30KW, and Nvidia's single cabinet power reaching 120KW. This shift necessitates new power supply architectures due to the limitations of traditional DC power distribution systems [1]. - Solid State Transformers (SST) are positioned as the ultimate solution for AIDC power management due to their high efficiency (up to 98%) and compact design, which can significantly reduce equipment count by approximately 40% [2][3]. - The 800V HVDC system is identified as a starting point for SST penetration, offering active flexibility and compatibility with green energy, which is crucial as new data centers in China are required to have over 80% green energy usage [3]. Summary by Sections AIDC Power Management - The cost of power-related equipment in typical AIDC projects accounts for nearly 50% of total costs, highlighting the importance of efficient power solutions [1]. - SST technology is expected to evolve towards gigawatt-level applications, with Delta's 800V SST system already reaching MW-level capacity [1]. SST Technology - SST replaces traditional transformers with high-frequency power electronics, achieving higher efficiency and smaller size, which is essential for modern data centers [2]. - The modular design of SST integrates multiple functions, reducing the need for various traditional devices [2]. Market Opportunities - Companies such as Sifang Co., China West Electric, Jinpan Technology, and Xinte Electric are highlighted as key players in the SST system and materials market, with significant advancements in efficiency and application [3].