Custom-made for a Vietnamese client: CRGO grain-oriented silicon steel transformer cores
A Vietnamese company specializing in the production of small distribution transformers planned to launch a new model to enhance product competitiveness and urgently required a batch of high-quality CRGO transformer cores made from grain-oriented silicon steel. In February 2025, the client found us through a Google search and clearly stated their requirements: 600 pieces of custom-spec oriented silicon steel CRGO transformer cores for the development of their new transformer product. The cores needed to feature low loss, high precision, and compatibility with automated winding processes. Additionally, the client requested technical support to ensure the cores would integrate seamlessly with their winding equipment.
Upon receiving the request, we took it very seriously and arranged for our technical team to engage in in-depth discussions with the client. We thoroughly reviewed the design parameters, winding processes, and application scenarios of their new transformer. Based on these requirements, we recommended a high-grade grain-oriented silicon steel material. This material offers advantages such as high magnetic permeability, low no-load loss, and high energy efficiency, which can effectively enhance the performance of the new transformer while being compatible with automated winding processes, thereby improving the client’s production efficiency.Based on the drawings provided by the client, we rapidly completed the design and sample production, delivering the samples to the client for testing within five days.
Precision Customization Ensures Transformer Core Quality
To ensure the 600-piece CRGO grain-oriented silicon steel transformer core fully met the client’s requirements, our technical team closely monitored the entire process from sample confirmation to mass production. During sample testing, the client suggested minor dimensional adjustments. We responded immediately, completed the modifications on the same day, resubmitted the samples for testing, and ultimately received the client’s approval.During mass production, we strictly adhere to the revised drawings and technical standards. We select high-grade, premium-grade grain-oriented silicon steel as raw material and use precision cutting equipment to ensure the dimensions of every core sheet are accurate. After cutting, we perform deburring to prevent any issues in the subsequent winding process.
During the lamination process, we employ precision lamination techniques, strictly controlling lamination pressure and the sequence of lamination to ensure the cores are tightly stacked, minimizing magnetic leakage and enhancing magnetic permeability and energy efficiency. Simultaneously, we conduct individual inspections on each core, focusing on dimensional accuracy, loss performance, and visual quality to ensure every core meets the client’s requirements.Throughout the production process, we provide timely updates on production progress to keep customers informed in real time, thereby alleviating any concerns they may have.
Successful Commissioning Leads to Long-Term Partnership for Transformer Cores
After 12 days of production and testing, the entire batch of 600 CRGO grain-oriented silicon steel transformer cores was completed. JINMA Transformer Core employed secure packaging to ensure the goods remained undamaged during transit, and subsequently arranged for rapid delivery to the Vietnamese client.Upon receiving the shipment, the client immediately tested the cores on their equipment. The results demonstrated excellent magnetic permeability, compliance with loss standards, and precise dimensions, ensuring perfect compatibility with their winding equipment and fully meeting the upgrade requirements for their new transformer models.
The customer highly praised our product quality, customization capabilities, and responsiveness, stating explicitly: “Your CRGO transformer cores feature consistent quality, on-time delivery, and efficient communication; you are a transformer core supplier worthy of long-term partnership.””Thanks to our consistent quality and rapid response capabilities, we have established stable partnerships with transformer manufacturers across Southeast Asia. We continue to provide customers with a full range of high-quality products, including CRGO cores, laminated cores, toroidal cores, and C-shaped cores, helping them enhance product competitiveness and expand into local markets.
JINMA Transformer Core Supplier
HENAN JINMA ELECTRIC is a professional transformer core manufacturer specializing in the production of strip-wound cores made from amorphous materials, nanocrystalline alloys, silicon steel, and Permalloy nickel-based alloys. We provide customized solutions for oriented silicon steel (CRGO) transformer cores tailored to applications such as the development of small distribution transformers.Our products are widely used in power transmission/distribution, industrial electronics, renewable energy, and the automotive industries. Production is overseen by experienced operators to ensure the reliable quality of every product. We welcome you to contact JINMA Transformer Core Manufacturer at any time to discuss your transformer core requirements; we will find the core solution best suited for your project.
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