Core transformer is the core magnetic circuit component of power distribution transformer, power transformer and industrial transformer, which is made by stacking high grade oriented silicon steel sheets, and is the key carrier of transformer to realize electromagnetic energy conversion.
The laminated silicon steel iron core produced by our factory is manufactured by professional structural design and precision technology, with four core characteristics: low core loss, high magnetic conversion efficiency, stable operation performance and long service life, which can effectively improve the energy efficiency of the whole transformer and reduce the operation energy consumption.
✅ Low loss structure design: optimize the magnetic circuit direction, reduce eddy current loss and hysteresis loss.
✅ High-precision stacking process: precise control of the gap between the pieces to improve the overall magnetic performance of the core.
✅ Full-size customization: design the core size according to the needs of different power transformers.
| Parameter Category | Technical Indicators | Applicable Standards |
| Silicon Steel Material | 30Q120, 30Q105, 27Q100 and other oriented silicon steel sheets | IEC 60076, ANSI C57 |
| Flux Density | 1.7~1.85T (rated condition) | GB/T 6451, IEC 60404 |
| Loss Level | P0.75/130, P0.7/120 (complies with DOE energy efficiency standards) | IEC 60076-2 |
| Lamination Factor | ≥97% | GB/T 19076 |
| Insulation Method | Interlaminar coating of high-temperature resistant insulating paint, surface plastic spraying treatment | IEC 60641 |
| Temperature Rise Limit | ≤80K (under rated load) | IEC 60076-1 |
| Applicable Power | 10kVA~20000kVA | Customized Adaptation |
Core transformer core adopts core column – iron yoke symmetrical closed magnetic circuit structure, is currently the most widely used form of iron core for power transformers, its structural composition and core design features are as follows:
From the selection of raw materials to the delivery of finished products, through 6 core processes, each step is equipped with professional equipment and quality control testing to ensure that the quality of the core meets the standards:
(Suggested drawing: actual pictures of production site of each process, with the name of the equipment and process points labeled)
Our factory supports full specification core transformer core customized production, according to the design drawings provided by the customer, technical parameters or the actual application requirements, for you to tailor-made iron core products, truly realize the customized, accurate matching.
Customizable Scope
l Iron core size: core diameter, yoke height, window size, core overall length, width and height of the full-dimensional customization.
l Silicon steel grade: different grades of oriented silicon steel sheets can be selected according to needs, balancing energy efficiency and cost.
l Stacking design: Stepped stacking, slanted seam stacking and other customized processes to optimize the performance of the magnetic circuit.
l Power capacity: suitable for transformers of different power levels from 10kVA to 20,000kVA.
l Special process: surface insulation treatment, core grounding design, special mounting structure customization.
Customized process: send drawings/requirements → engineers technical docking → program quotation confirmation → sample trial production → mass production → logistics delivery
Immediate customization: send your design drawings, get the exclusive customized program and quotation
With stable performance and flexible customization, our core transformer cores are widely used in electric power system, industrial production, new energy power generation and other fields, suitable for all kinds of transformer equipment:
Core type and shell type are two mainstream forms of transformer core, both in the structure, performance, application scenarios have their own characteristics, our core transformer core with more suitable for power system design advantages, become the mainstream market choice, core comparison is as follows:
| Comparison Dimension | Core-Type Transformer Core | Shell-Type Transformer Core |
| Structural Features | Core columns are outside, windings are sleeved on the core columns, and the yoke closes the top and bottom | Windings are wrapped by the iron core, and the magnetic circuit is an enclosed structure |
| Magnetic Circuit Design | Symmetric magnetic circuit, short path, low loss | Longer magnetic circuit, partial magnetic flux leakage, slightly higher loss |
| Manufacturing Process | Simple process, convenient lamination, high production efficiency | Complex structure, high lamination difficulty, long production cycle |
| Consumable Cost | Less silicon steel sheet usage, lower overall cost | More silicon steel sheet usage, higher manufacturing cost |
| Maintainability | Open structure, convenient maintenance of transformer windings | Closed structure, high maintenance difficulty |
| Application Scenarios | Power distribution, power, and new energy transformers, suitable for high power and high voltage | Small dry-type transformers and control transformers, suitable for low power and low voltage |
| Transportation and Installation | Moderate volume, convenient transportation, low installation difficulty | Large volume, inconvenient transportation, high installation requirements |
Our factory has always taken product quality as the core development concept, established a quality management system in line with international standards, passed a number of authoritative certificates, equipped with professional testing equipment and team, to ensure that each core product meets the standards.
Authoritative certificates
l ISO 9001 quality management system certification
IEC 60076 International Standard Certification for Transformers
l ANSI C57 American transformer standard certification
GB/T 6451 Domestic Transformer Standard Certification
Quality control process: raw materials into the factory inspection → process sampling → finished product testing → qualified into the warehouse → factory re-inspection
