Custom-Made for a Hong Kong Client: Transformer Core
In December 2024, a well-known transformer manufacturing company in Hong Kong found us through a Google search. Their core requirement was a custom laminated transformer core for a high-power distribution transformer production project. With years of experience in the transformer manufacturing industry, the client had stringent requirements for the core’s performance and explicitly outlined three key standards: first, no-load losses must be controlled at the industry’s premium level; second, dimensional accuracy must not exceed ±0.05mm;and third, the stacking density must meet specifications to ensure stable operation once installed. Additionally, due to tight project deadlines, the client required us to complete a batch delivery of 30 tons of custom products within 15 days, posing a dual challenge to our production efficiency and quality control.
Upon receiving the request, we immediately established a dedicated liaison team and assigned a senior technical engineer to engage in one-on-one communication with the client. We meticulously verified every detail—including drawing specifications, material requirements, and testing standards—and swiftly provided a detailed customization proposal and a competitive quote, which received the client’s preliminary approval. To ensure the feasibility of the proposal, we initiated sample production that very same day and delivered the samples within three days. After inspection, the client confirmed that the samples fully met their technical requirements, and a formal purchase contract was signed immediately.
Precise Quality Control to Ensure Transformer Core Quality
To meet the client’s high-quality standards, we maintain strict control throughout the entire production process, adhering to standardized procedures at every stage from raw material procurement to finished product shipment.Regarding raw materials, we select high-quality, high-permeability grain-oriented silicon steel sheets. This material offers the advantages of stable magnetic permeability, low loss, and a long service life, ensuring the core performance of the laminated transformer core from the source. During production, we utilize automated precision cutting equipment to effectively avoid issues such as burrs and dimensional deviations caused by manual cutting. After cutting, we perform specialized deburring to ensure the core surface is smooth and flat.
The laminating process employs standardized techniques performed by skilled technicians, who strictly control laminating pressure and sequence to ensure a compact core structure, thereby minimizing magnetic leakage and eddy current losses. After lamination, the core undergoes an insulating spray coating to enhance its insulation properties and provide moisture and rust resistance, meeting the demands of various operating conditions.Simultaneously, we assign quality inspectors to oversee the entire process. Every batch of products undergoes multiple inspection procedures, including loss testing, dimensional inspection, withstand voltage testing, and a full visual inspection. Only after passing all tests can the products proceed to the warehousing and packaging stage, ensuring that non-conforming products are strictly prevented from leaving the facility.
On-Time Delivery Establishes Long-Term Partnership for Transformer Cores
After 15 days of efficient production and rigorous testing, the entire 30-ton batch of custom laminated transformer cores was completed. We utilized moisture-proof and shock-resistant packaging to ensure the goods remained undamaged during transit, followed by prompt logistics dispatch to deliver the shipment on time to the location specified by our Taiwanese client.Upon receiving the shipment, the client immediately organized a professional team to conduct a comprehensive acceptance inspection. They meticulously tested every aspect—from dimensional accuracy and surface treatment to loss performance and overall consistency—and ultimately gave high praise: “The product quality far exceeded our expectations. The dimensions are precise with no deviations, and the core operates stably when installed, with low noise and minimal heat generation, fully meeting the requirements of our project.”
This collaboration not only successfully fulfilled the delivery requirements but also earned the client’s full trust. The client explicitly stated that they will designate us as their primary supplier of transformer cores and continue to place bulk orders. We consistently prioritize quality as our core principle, delivery as our guarantee, and service as our foundation. Leveraging our mature customization capabilities and meticulous production controls, we provide stable and reliable laminated transformer core products and customized solutions to transformer manufacturers both domestically and internationally, helping our clients enhance their product competitiveness.
JINMA Transformer Core Manufacturer
HENAN JINMA ELECTRIC is a professional transformer core manufacturer specializing in the production of laminated cores made from amorphous metal materials, nanocrystalline alloys, silicon steel, and Permalloy nickel-based alloys. We provide professional customized core solutions for applications such as high-power 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.
Explore more details now!
