30kHz DAB

• 24MW SST Design: Why Nanocrystalline Cores are the Heart of High-Frequency Power

  

  Mar 17, 2026

  The shift from traditional grid transformers to 24MW Solid State Transformers (SST) is driven by the need for extreme power density and efficiency. Converting 20kV to 0.8kV at a switching frequency of 30kHz requires more than just high-end semiconductors; it requires a breakthrough in magnetic material science. At JH Amorphous, we don’t just supply parts. When a client approaches us with a high-power design, our first engineering question is: "What is the topology for this component?" This allows us to tailor our nanocrystalline solutions to the specific stresses of your circuit.   The Architecture: 20kV ISOP & 30kHz DAB Scaling a system to 24MW requires a modular approach. The Input-Series Output-Parallel (ISOP) topology is used to manage the 20kV input by cascading 33 individual modules. Inside each module, the Dual Active Bridge (DAB) converter operates at 30kHz. At this frequency, the magnetic core is the primary bottleneck for thermal management. This is where JH Amorphous’s material expertise becomes the critical factor in system reliability.   Why Nanocrystalline is Mandatory for 24MW SST In a 727kW module, ferrite cores often reach their saturation limits too quickly, leading to massive heat spikes. Our Nanocrystalline cores provide a superior alternative: High Saturation Flux Density (Bs：1.25T ): Our materials handle higher power in a smaller footprint, reducing the overall size of the SST. Minimal Core Loss: At 30kHz, JH Amorphous nanocrystalline ribbons exhibit significantly lower losses than traditional silicon steel or ferrite, enabling the system to exceed 98.5% efficiency. Thermal Stability: Engineered for the demanding environment of 24/7 grid operation.   Precision Control & Engineering Logic A successful SST design is a "symphony" of hardware and software. We optimize our magnetic components to support: ZVS (Zero Voltage Switching): Minimizing switching stress on SiC MOSFETs. Balanced Power Flow: Our cores are manufactured with tight tolerances to ensure consistent performance across all cascaded modules in the CHB string. Optimized Winding: We provide design consultation on Litz wire and copper foil integration to maximize the benefits of our high-permeability materials.   Powering the Future of Grid Technology At JH Amorphous, we understand that an engineer is the soul of the product. Our goal is to provide the "magnetic backbone" for your most ambitious power electronics projects. Ready to optimize your 30kHz transformer design? Contact Julia at JH Amorphous for technical datasheets and custom core benchmarking.

  Hot Tags : 20kV Grid 30kHz DAB Nanocrystalline Transformer Core 24MW SST JH Amorphous SST Design

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