Zhuhai Weihan Wire: Empowering the New Generation of Smart Grid and Power Electronic Equipment (Business Edition)

With the rapid development of new energy grid integration, smart grids, data centers and rail transit, traditional power frequency transformers can no longer meet the demands for high efficiency, intelligence and compactness. As a revolutionary technology, Solid-State Transformer (SST) has become the core of next-generation power conversion. For SST’s key components (high-frequency transformers and inductors), Litz Wire is the critical material to solve high-frequency loss and ensure high performance.

1. Solid-State Transformer (SST): Core of Future Power Conversion

SST is a static power device that realizes voltage conversion, electrical isolation and power quality regulation through multi-stage power electronic conversion and high-frequency coupling. Its core process: Power frequency AC → Rectification (AC-DC) → High-frequency inversion (DC-HFAC) → High-frequency transformer isolation → Rectification/Inversion → Target output.

Advantages over traditional transformers:

- Ultra-miniaturization: 50%-80% reduction in volume and weight (10kHz-200kHz+ operating frequency).

- Ultra-high efficiency: 98.5%-99% system efficiency with SiC/GaN wide-bandgap devices.

- Intelligent controllability: Real-time regulation of voltage, frequency and harmonics; bidirectional energy flow.

- Diversified scenarios: Suitable for new energy grid connection, energy storage, EV charging piles, etc.

2. Core Challenge of SST High-Frequency Operation

High-frequency operation causes severe skin effect and proximity effect, leading to uneven current distribution, increased AC resistance and high power loss, which restricts SST’s efficiency and power density.

3. Litz Wire: Solution to SST High-Frequency Losses

Litz Wire is a special magnet wire made of hundreds to thousands of insulated ultra-fine copper filaments. It suppresses skin and proximity effects through filament miniaturization and transposition stranding.

Application value in SST:

- Reduce high-frequency loss by 60%-90% and improve overall efficiency.

- Avoid local overheating, extend insulation life and enhance reliability.

- Boost power density, enabling SST miniaturization and lightweight design.

- Compatible with SiC/GaN ultra-high frequency (MHz-level) working conditions.

4. Weihan Wire: High-End Litz Wire for SST Industry

As a professional special wire manufacturer in China, Zhuhai Weihan Wire focuses on Litz Wire, providing high-performance, customized solutions for SST and other high-end power electronic equipment.

Core Advantages:

- Superior craftsmanship: 0.02mm ultra-fine wire, 5-20,000 strands, 10kHz-1MHz frequency adaptation.

- Strict material selection: ≥99.99% oxygen-free copper, 130℃-240℃ temperature resistance, excellent insulation performance.

- Customized service: Tailored to SST topology, power level and frequency.

- Quality & domestic substitution: ISO9001/IATF16949 certified, benchmarking international brands.

5. Conclusion

SST is the cornerstone of future smart grids and Energy Internet, while Litz Wire is key to its high performance. Zhuhai Weihan Wire will continue to focus on high-frequency special wires, empowering the upgrading of China’s power electronic and new energy industries, and creating a high-efficiency energy future with partners.