国盛证券：AIDC电源管理终极方案 SST产业链上游材料与器件迎来发展机遇

Core Insights - The adoption of Solid State Transformers (SST) is expected to drive demand for wide bandgap semiconductors like Silicon Carbide (SiC) and Gallium Nitride (GaN), with SiC primarily used in input applications and GaN in output applications [1] - The global solid-state transformer market is projected to grow at a compound annual growth rate (CAGR) of 25% to 35% over the next 5-10 years, benefiting both magnetic materials and power semiconductors [1] Group 1: Industry Transformation - The power supply systems for data centers are undergoing significant changes due to the explosion of AI computing power, with power density per rack increasing from under 60 kW to 150 kW or higher [1] - Solid State Transformers (SST) offer over 98% system efficiency and require less than 50% of the space compared to traditional solutions, making them a promising core solution for next-generation data center power systems [1][2] - NVIDIA's recent release of an 800V DC white paper highlights the critical role of SST in its next-generation power architecture, indicating strong industry recognition of SST technology [1] Group 2: Technical Advantages of SST - SST improves efficiency by replacing traditional transformers with high-frequency power electronics, achieving over 98% efficiency compared to 95.1% for traditional HVDC systems [2] - The compact design of SST, utilizing high-frequency magnetic materials and modular architecture, significantly reduces the size of transformers while integrating multiple functions, thus saving space in data centers [2] Group 3: Future Potential of SST - SST acts as a "software-defined" energy router, enhancing the intelligence and resilience of power supply systems through real-time control and fault self-recovery capabilities [3] - SST's compatibility with renewable energy sources allows for direct integration of solar and wind power, improving the acceptance of renewable energy by over 50% compared to traditional systems [3] - The dual active bridge topology of SST supports bidirectional energy flow, enabling energy storage during low demand and feedback to the grid during peak times, which can reduce operational costs for data centers [3] Group 4: Companies to Watch - Companies involved in SST systems include Sifang Co., Ltd. (with SST efficiency reaching 98.5% and applications in national demonstration projects), China West Electric (with a subsidiary's 2.4MW SST operational), and Jinpan Technology (developing a 10kV/2.4MW prototype) [4] - Companies focused on SST materials include Hengdian East Magnetic (largest ferrite material company globally), Placo New Materials (new soft magnetic materials with frequencies over 10 MHz), and Yunlu Co., Ltd. (global leader in amorphous alloys) [4]