As a pioneer in transformer manufacturing, CHH Power has consistently upgraded its production technologies to enhance product efficiency, reliability, and energy performance. From core processing to energy-saving design, the company integrates industry-leading innovations into every link of its manufacturing chain. Below is a detailed breakdown of CHH Power’s key technological advancements in transformer production.
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1. Core Manufacturing Technology: Precision and Efficiency Optimization
CHH Power elevates its iron core production capabilities by upgrading shearing equipment and adopting cutting-edge processes, driving improvements in core quality and energy efficiency:
- Embedded Yoke Process for Core Columns: Unlike conventional methods, CHH Power employs the embedded yoke process for its distribution transformer cores. This innovation eliminates the need for extensive mandrel stacking, drastically reducing production time while enhancing the uniformity and precision of core lamination. It has become a cornerstone of CHH Power’s automated core production line, boosting manufacturing efficiency by over 30%.
- Multi-Stage Seam Core Application: To minimize no-load loss at core joints, CHH Power has replaced traditional single-joint designs with partial multi-stage (step) joints. This modification reduces transformer no-load loss by more than 15% and lowers operational noise by 3%–4%—key advantages for residential and noise-sensitive applications.
- Evolution of Core Piece Processing: Building on China’s early silicon steel sheet slitting lines (simple setups with domestic slitting machines and multiple shears in the 1970s), CHH Power now uses high-precision numerical control (NC) shearing equipment. This upgrade ensures consistent silicon steel sheet dimensions, laying a foundation for high-performance core assembly.
2. Winding Manufacturing Technology: Streamlined Assembly for Scalability
First developed in the 1990s, the winding assembly process has become a core part of CHH Power’s production strategy due to its efficiency and reliability. CHH Power was among the early adopters of this technology, which simplifies winding installation by standardizing assembly steps. Today, the process is fully integrated into the company’s automated production lines, enabling rapid scaling of output while maintaining strict quality control—critical for meeting large-scale orders for power and distribution transformers.
3. Insulation Processing Technology: Automation for High-Voltage Reliability
As transformer voltage levels and test requirements expanded in the 1980s, insulation processing emerged as an independent, specialized step (separate from metal processing) at CHH Power. The company has since invested in gantry CNC machining centers, achieving full automation of insulation component processing. This automation ensures micron-level precision in insulation parts (e.g., spacers, barriers), which is essential for withstanding high voltages and preventing breakdowns. For CHH Power’s 220kV and above power transformers, this technology directly enhances operational safety and extends service life.
4. Insulation Drying and Oil Treatment Technology: Safeguarding Oil-Immersed Transformers
For its oil-immersed transformers (the dominant type in power applications), CHH Power prioritizes two core processes: insulating material drying and transformer oil purification, both critical for maintaining the oil-paper insulation structure’s performance:
- Gas Phase Drying: Following China’s lead in importing Swiss gas phase drying equipment in the mid-1980s, CHH Power has upgraded its facilities with new built-in kerosene evaporators. While traditional external evaporators offer simpler maintenance, the built-in design reduces heat loss and improves drying uniformity—CHH Power selects the optimal setup based on transformer size and production batches.
- Transformer Oil Treatment: Since the 1980s, CHH Power has adopted advanced vacuum spray oil purification technology (introduced from Europe and the US). This method effectively removes impurities and moisture from transformer oil, outperforming traditional filtration. It ensures the oil meets strict dielectric strength standards, protecting the transformer’s internal components from corrosion and breakdown.
5. Energy-Saving Technology: Leading the Transition to High-Efficiency Series
CHH Power has been at the forefront of China’s transformer energy-saving evolution, guiding the market transition through series upgrades from S6 and S7 to S9 and the latest S11:
- Market Transition Dynamics: While S9 energy-saving transformers currently dominate CHH Power’s product mix (as the mainstream market choice), the company is expanding its S11 lineup in response to growing demand. Initially, S11 products faced adoption barriers—their average price is 14.2% higher than S9—but CHH Power has optimized production processes (e.g., using advanced core materials) to reduce costs, making S11 more accessible.
- S11 Product Advantages: CHH Power’s S11 transformers build on the mature technology of S9, with significantly improved performance while maintaining reliability:
- Laminated Core S11: Designed for enhanced efficiency, it meets the rising needs of users with low transformer load rates (e.g., rural power grids).
- Wound Core S11 Distribution Transformer: Compared to traditional laminated models, it offers material savings, 10%–15% lower energy consumption, improved power supply quality, reduced noise, and higher mechanization in production—aligning with CHH Power’s commitment to sustainable energy solutions.
Through these technological innovations, CHH Power continues to set benchmarks in transformer manufacturing, balancing performance, efficiency, and environmental responsibility.