Transformers play a vital role in electrical power systems, enabling efficient transmission and distribution of electricity. At the heart of every transformer lies the core, a crucial component that ensures the smooth conversion of electrical energy between different voltage levels. This article will explore two commonly used core materials in transformers, CRGO (Cold-Rolled Grain Oriented) and CRNGO (Cold-Rolled Non-Grain Oriented), highlighting their characteristics, advantages, and application scenarios. CRGO Transformer Cores CRGO cores are widely employed in power transformers, where high efficiency and low core losses are crucial. The production process involves cold-rolling a silicon steel strip to align the grains in the crystal lattice structure, resulting in excellent magnetic properties. CRGO cores exhibit the following key features: Reduced Core Losses: The grain-oriented structure of CRGO cores minimizes magnetic hysteresis and eddy current losses, leading to superior energy efficiency and reduced heat generation. High Magnetic Permeability: CRGO cores exhibit high magnetic permeability, enabling efficient magnetization and demagnetization cycles during power conversion processes, thus enhancing overall transformer performance. Low Magnetostriction: Magnetostriction is the phenomenon where a material changes shape under the influence of a magnetic field. CRGO cores have low magnetostriction, reducing mechanical stress on the transformer and minimizing audible noise. Application Scenarios: CRGO cores are commonly used in large power transformers, distribution transformers, and high-power applications due to their excellent energy conversion efficiency and performance stability over a wide range of operating conditions. CRNGO Transformer Cores CRNGO cores are predominantly employed in low and medium-power transformers, along with various electrical machines, such as motors and generators. Unlike CRGO cores, CRNGO cores do not possess grain-oriented crystal structures. Their key characteristics include: Enhanced Permeability: Although lower than CRGO cores, CRNGO cores still exhibit reasonable magnetic permeability, making them suitable for applications requiring moderate power conversion efficiency. Lower Production Costs: The absence of grain orientation in CRNGO cores simplifies the manufacturing process, resulting in reduced production costs compared to CRGO cores. Wide Variety of Shapes: CRNGO cores can be easily tailored into different shapes and sizes, allowing for design flexibility and customization to meet specific application requirements. Application Scenarios: CRNGO cores find extensive use in lower-power transformers, small power supplies, electric vehicles, and other applications demanding cost-effectiveness and optimal performance within a limited operating range. Selecting the appropriate transformer core material is critical to achieving optimal performance and efficiency in various electrical applications. CRGO cores excel in high-power transformers, where minimal losses and excellent energy conversion are paramount. On the other hand, CRNGO cores find applications in low-to-medium-power transformers, motors, and generators, offering a balance between performance and cost-effectiveness. Understanding the characteristics of these transformative core materials is essential for designing reliable and efficient electrical systems. As a leading transformer manufacturer, our company specializes in producing high-quality transformer cores tailored to meet the diverse needs of our customers. Whether you require CRGO or CRNGO cores, we are committed to delivering exceptional products that optimize performance and contribute to the advancement of electrical power systems. We welcome you to contact us for any transformer core requirements or further inquiries.  

Transformers use various types of cores, with the most common ones being E-type and C-type cores. What are the differences between these two types of cores? And in which applications are they commonly used? Today, SHUNGE will tell you all about it. E-type and EI-type cores are widely used in the industry. One of their main advantages is that the primary and secondary windings can share the same core, resulting in a higher window utilization factor. The core also provides protection for the windings, making them less susceptible to mechanical damage. Additionally, E-type cores have a larger heat dissipation area and reduce magnetic field dispersion. However, E-type cores also have some drawbacks. They tend to have larger magnetic resistance due to the presence of larger air gaps in the magnetic path, which reduces the overall performance of the magnetic circuit. Furthermore, E-type cores are prone to issues such as higher copper wire usage, greater leakage inductance, and susceptibility to external magnetic field interference.   C-type cores are manufactured by winding cold-rolled silicon steel strips, which are then subjected to heat treatment and impregnation processes to form closed cores. These closed cores are then split to create two C-type cores. The windings are then encapsulated within the cores, and a pair of C-type cores are assembled and secured together to form the transformer. C-type cores can have very small air gaps, and they offer advantages such as smaller size, lighter weight, and higher material utilization. So, how can we identify the type of transformer core used in a power supply? 1. Identification based on appearance: E-type cores have a shell-like structure, with a core that wraps around the coils. They are commonly made of high-quality silicon steel sheets such as D41 and D42. C-type cores, on the other hand, are made of cold-rolled silicon steel strips and have a core-type structure. 2. Identification based on the number of winding terminals: Power transformers often have two windings, a primary and a secondary, resulting in four terminal connections. Some power transformers may have an additional shielding layer between the primary and secondary windings for AC noise and interference suppression. In such cases, the shielding layer is grounded. Therefore, power transformers typically have at least four terminal connections. 3. Identification based on the stacking method of silicon steel sheets: In E-type power transformers, the silicon steel sheets are interleaved, with no air gaps between the E-shaped and I-shaped sheets. The entire core fits together tightly. In contrast, audio input/output transformers have certain gaps between their E-shaped sheets, which serves as a distinguishing feature from power transformers. C-type transformers are generally used as power transformers. Shunge Steel, founded in 2008 and headquartered in Lecong, Foshan, produces cores with features such as low iron loss, high magnetic permeability, and high saturation induction. Our cores find applications in various fields, including signal communication, power drive, traction, renewable resources, charging station power control, high-precision measurement and control, new energy vehicle battery management, power control, welding, and new energy vehicle motor control. If you have any core requirements, please feel free to contact us.

Recently, we received some inquiries from customers about dry-type transformers and oil-immersed transformers. As you may know, dry-type transformers are generally more expensive compared to oil-immersed transformers. But why? What’s the difference between them? Let Catherine explain it to you today! Installation Location Dry-type transformers are preferred for indoor locations such as basements, floors, and rooftops, especially in areas with high human population density oil-immersed transformers are typically used in substations. Application Box-type transformers are generally used for indoor applications, while oil-immersed transformers are commonly used for outdoor temporary power supply. Space Considerations The choice between dry-type and oil-immersed transformers depends on the available space. oil-immersed transformers are suitable for larger spaces, while dry-type transformers are preferred in compact spaces. Climate: oil-immersed transformers are more suitable for humid and hot environments. If dry-type transformers are used in such conditions, they must be equipped with forced air-cooling systems. Appearance Dry-type transformers have visible cores and coils, while oil-immersed transformers are enclosed and only the outer shell is visible. Connection Dry-type transformers mostly use silicone rubber bushings, while oil-immersed transformers often use porcelain bushings. Capacity and Voltage Dry-type transformers are mainly used for distribution purposes, with capacities up to 1600 KVA and voltages below 10 KV. oil-immersed transformers can handle all capacities and voltage levels, including high voltage such as 1000 KV. Insulation and Cooling Dry-type transformers use resin insulation and rely on natural or forced-air cooling, while oil-immersed transformers use insulating oil for insulation and heat dissipation through radiators or cooling fins. Suitable Locations Dry-type transformers are commonly used in fireproof and explosion-proof environments, often in large and high-rise buildings. On the other hand, oil-immersed transformers are typically installed outdoors with provisions for an "incident oil pit" in case of leaks or spills. Load-Bearing Capacity Dry-type transformers should operate within their rated capacity, while oil-immersed transformers have better overload capacity. Cost Dry-type transformers are generally more costly compared to oil-immersed transformers of the same capacity. If you want to know more about transformer cores, especially hope to purchase some good transformer cores in China. Contact SHUNGE! We will be very glad to help!