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.

Transformer cores are commonly made of silicon steel sheets. Silicon steel, a type of carbon with silicon content ranging from 0.8 to 4.8%, strong magnetic properties. silicon steel sheets for transformer cores allows for higher magnetic induction, leading to reduced size.

In practical, transformers work under current conditions, resulting in losses in both the resistance and the core. These losses consist of two components: hysteresis loss and eddy current loss.

hysteresis loss and eddy current loss

Hysteresis loss occurs due to the magnetic hysteresis phenomenon in the core material during the magnetization process. Silicon steel has a narrow hysteresis loop, which minimizes hysteresis loss and reduces heat generation in the core.

Why do we process silicon steel into laminated sheets instead of using a solid block? The answer lies in minimizing another type of iron loss called "eddy current loss." When alternating current flows through the winding, it generates a varying magnetic flux in the core. This changing flux induces eddy currents within the core material, resulting in heat generation. To minimize eddy current loss, transformer cores are made by stacking insulated laminations of silicon steel, creating a compact and efficient pathway for eddy currents with reduced cross-sectional area. Additionally, the silicon content in the steel increases its resistivity, further mitigating eddy current effects.

Typically, transformer cores are constructed using cold-rolled silicon steel sheets with a thickness of 0.2 to 0.5mm. These sheets are cut into elongated shapes and then stacked in a "E-shaped" or "C-shaped" configuration, depending on the specific needs. Thinner laminations and narrower interleaved sections result in better eddy current suppression, decreased temperature rise, and material cost savings.

Tube sheet refers to the plate used for supporting and protecting pipelines. Pipelines are usually connected to the tubesheet through mechanical fixation or welding after drilling. In addition to serving as a fixing function, the pipe plate can also withstand the fluid and pressure inside the pipeline, reducing vibration and damage during operation. Carbon steel tube sheet, as a common tube sheet material, has a wide range of applications.

Carbon steel tube sheets are mainly composed of iron and carbon, which contain a high proportion of carbon elements, usually between 0.2% and 2.1%. In addition, it may also contain small amounts of elements such as manganese, silicon, and phosphorus, which can improve the strength and corrosion resistance of carbon steel plates. Here are some main advantages and disadvantages of carbon steel pipe sheets:

Advantages:

1. High cost-effectiveness: Carbon steel, as a common and economical material, is more affordable compared to other high alloy materials, making carbon steel pipe sheets the preferred choice in many applications.

2. High strength: Carbon steel is a type of steel with high strength, and its tensile strength is usually between 400-550MPa. This enables carbon steel plates to have high strength and rigidity under heavy loads and high pressures, enabling carbon steel pipe plates to maintain stability and reliability in high temperature and high pressure environments.

3. Good wear resistance: Carbon steel plates can achieve higher hardness and good wear resistance after heat treatment. Therefore, in some situations where wear resistance is required, carbon steel plate is the preferred material.

4. Easy to process and weld: Due to its low carbon content, carbon steel plates have good plasticity and weldability, and can be processed through various methods such as cold processing and hot processing. This makes the manufacturing and installation process of carbon steel pipe sheets relatively simple and efficient, reducing production costs and time.

5. Good environmental performance: Compared to other materials, carbon steel plates have better environmental performance. It can be recycled and reused to reduce resource waste and also reduce environmental pollution.

Disadvantages:

1. Easy to corrode: Carbon steel plates are prone to rusting, which is one of their biggest drawbacks. Due to the high content of iron in carbon steel plates, rust will occur when they react with oxygen in the air. This not only affects the appearance, but also leads to corrosion and damage to the surface of the board. Compared to stainless steel and other high alloy materials, carbon steel is more prone to corrosion in corrosive environments such as humidity, acidity, and alkalinity, which may lead to damage and shortened lifespan of the tube plate. To address corrosion issues, surface coatings or the use of anti-corrosion coatings can be used to enhance the corrosion resistance of carbon steel pipe sheets.

2. Not suitable for high temperature and strong acid environments: Carbon steel has lower temperature and acid resistance than high alloy materials, so in some applications that require high temperature or acidic media, carbon steel pipe sheets may not be suitable. This drawback can be avoided by welding other alloy materials to alter the performance of the contact surface.

3. Heavy weight: Compared to some lightweight alloy materials, carbon steel pipe sheets are relatively heavy, which may increase installation and maintenance difficulties.

In summary, carbon steel pipe sheets have advantages such as high cost-effectiveness, high strength, and ease of processing. However, their corrosion resistance, temperature resistance, and weight need to be evaluated based on specific application environments, and suitable materials should be selected to meet the requirements.

Industrial rubber casters play a pivotal role in various sectors due to their versatility, durability, and reliability. Among the diverse range of caster wheels available in the market, medium duty 3" PVC rigid caster wheels, swivel industrial rubber cast iron casters, and cast iron core PU caster wheels stand out for their exceptional performance and applications. Let's delve into the diverse applications of these industrial rubber casters:

Medium Duty 3" PVC Rigid Caster Wheels:

Medium duty 3" PVC rigid caster wheels are designed to withstand moderate loads while offering excellent maneuverability and stability. These caster wheels find applications in industries where mobility and durability are paramount, such as:

Warehousing and logistics: They are extensively used in carts, dollies, and material handling equipment for transporting goods within warehouses and distribution centers.

Retail environments: Medium duty PVC rigid caster wheels are employed in retail display racks, utility carts, and shelving units, facilitating smooth movement of merchandise and supplies.

Hospitality industry: These caster wheels are utilized in hotel housekeeping carts, laundry carts, and food service trolleys, ensuring efficient service delivery without compromising on durability.

Swivel Industrial Rubber Cast Iron Casters:

Swivel industrial rubber cast iron casters offer exceptional maneuverability and load-bearing capacity, making them ideal for heavy-duty applications across various industries. Some notable applications include:

Manufacturing and production facilities: These casters are integral components of machinery and equipment used in manufacturing processes, providing mobility and flexibility in production lines.

Automotive industry: Swivel industrial rubber cast iron casters are utilized in automotive repair shops and manufacturing plants for moving heavy vehicle components and assemblies.

Construction sites: They are employed in scaffolding, tool carts, and equipment stands, facilitating easy movement of construction materials and tools across job sites.

Cast Iron Core PU Caster Wheel:

Cast iron core PU caster wheels combine the strength of cast iron with the resilience of polyurethane, offering superior load-bearing capacity and shock absorption. They find applications in various industries, including:

Aerospace and aviation: These caster wheels are used in aircraft maintenance trolleys, ground support equipment, and aerospace manufacturing facilities, ensuring smooth and safe movement of heavy components.

Healthcare sector: Cast iron core PU caster wheels are integral to medical equipment such as hospital beds, patient lifts, and mobile medical carts, providing stability and maneuverability in healthcare environments.

Food processing industry: They are employed in food processing equipment, bakery racks, and catering trolleys, meeting stringent hygiene standards while withstanding heavy loads and frequent washdowns.

In conclusion, industrial rubber casters, including medium duty PVC rigid caster wheels, swivel industrial rubber cast iron casters, and cast iron core PU caster wheels, serve a wide range of applications across diverse industries. Their durability, maneuverability, and load-bearing capacity make them indispensable components in material handling and mobility solutions, contributing to increased efficiency and productivity in various workplace environments.

In today's design and architectural realm, water ripple metal sheets have become a highly favored material. Not only do they bring a unique aesthetic to buildings, but they also imbue spaces with a sense of dynamism and modernity. In this article, we delve into the various uses, advantages, and innovative applications of water ripple metal sheets.

The Wonders of Water Ripple Metal Sheets

Visual Impact: The distinctive texture of water ripple metal sheets offers endless possibilities for architecture and design. When light reflects off the surface of the metal sheet, it creates stunning light and shadow effects, making the entire space vibrant and intriguing.

Durability: Metal sheets possess excellent weather resistance and corrosion resistance, making them an ideal choice for both outdoor and indoor environments. Whether exposed to sunlight or in humid conditions, water ripple metal sheets maintain their beauty and functionality.

Versatility: The malleability of metal sheets allows designers to use them in various shapes and structures. Whether it's curved walls, roof coverings, or interior decorations, water ripple metal sheets can adapt effortlessly.

Environmentally Friendly: Many water ripple metal sheets are made from recyclable materials, making them an environmentally sustainable choice for construction. Compared to other materials, the production process of metal sheets generates less waste and allows for multiple cycles of reuse.

Applications of Water Ripple Metal Sheets

Building Facades: Water ripple metal sheets are commonly used for decorating building facades, giving them a unique appearance. Their rich texture and play of light and shadow provide different aesthetic experiences at different times and angles.

Interior Decoration: In interior design, water ripple metal sheets are often used for walls, ceilings, and partitions. With appropriate lighting and layout, they can create a comfortable, modern indoor environment.

Artworks and Sculptures: Designers and artists frequently use water ripple metal sheets to create artworks and sculptures. The material's unique texture lends vivid expression to the pieces, capturing the viewers' attention.

Innovative Application Cases

Sustainable Architecture: Some innovative designs combine water ripple metal sheets with solar technology to form sustainable architectural solutions. These sheets not only serve decorative purposes but also capture solar energy and convert it into electricity.

Acoustic Regulation: Utilizing the properties of metal sheets, designers can develop walls and partitions with excellent acoustic effects. By adjusting the density and spacing of the sheets, sound propagation can be effectively controlled, improving the acoustic environment of the space.

Natural Ventilation Systems: Some buildings incorporate water ripple metal sheets in designing natural ventilation systems, utilizing the texture and gaps of the sheets to promote airflow, lower indoor temperatures, and enhance comfort.

In the design and architectural realm, water ripple metal sheets have become a highly sought-after material, with their unique aesthetic effects and multifunctionality shining in various applications. With technology and innovation continuously advancing, we can expect to see more awe-inspiring applications of water ripple metal sheets emerging.

Atomic emission spectrum analysis has its unique advantages, especially suitable for pre-furnace analysis, so that it has become an essential analytical means for metal smelting and casting industry, and its characteristics are as follows:

(1) Multi-element simultaneous detection capability. Simultaneous determination of multiple elements in a sample. After each sample is excited, the different elements emit characteristic spectra, so that multiple elements can be determined simultaneously. For complex products, the more analytical elements are required to heal, and the economic benefits are good.

(2) Fast analysis speed. If the photoelectric direct reading spectrometer is used to analyze the sample without chemical treatment, the sample taken in the furnace can be excited on the sample table as long as the surface oxide is polished off, eliminating the trouble of drilling the sample for chemical analysis. For aluminum and copper, zinc and other non-ferrous metal samples, you can use a small lathe to remove the surface oxide can be directly measured. From sample excitation to the computer to report the element analysis content only 20-30 seconds, the speed is very fast, which is conducive to shortening the smelting time and reducing the cost. Especially for those elements that are easy to burn, it is easier to control their final composition.

(3) High accuracy. The analysis accuracy is very high, can effectively control the chemical composition of the product, ensure that it can meet the national standard specifications, and even the alloy composition can be controlled to the lower limit of the specification to save the consumption of intermediate alloys or ferroalloys.

(4) Less sample consumption.

(5) The analytical data can be printed out from the computer or stored on a floppy disk as a permanent record.

In short, from a technical point of view, photoelectric spectral analysis, it can be said that there is no more effective instrument than it can be used for rapid analysis in front of the furnace, with so many characteristics and can replace it. Therefore, the world's smelting, casting and other metal processing enterprises are competing to use this kind of instrument to become a conventional means of analysis, from the guarantee of product quality, from the economic benefits and other aspects, it is a very favorable analysis tool.

     Demagnetization is the loss of magnetic field strength in magnets. Every magnet has a specific temperature, which is called the Curie temperature, at which it loses its magnetism. If magnets cool to room temperature, they may not regain previous super strong magnetic strength.

What causes strong neodymium magnets to demagnetize?

1. Influence of external magnetic field

     External magnetic fields, especially strong magnetic fields, can cause magnets to lose strength. The alignment of the magnetic domains can be disrupted when exposed to the north and south poles of another magnet.

2. Effects of heat exposure

     Heating permanent rare earth neodymium magnets to the Curie temperature causes its magnetic domains to randomize. Even if the magnet cools down, its original magnetic force may be reduced.

3. The role of working temperature

     Magnets' operating temperature is the highest temperature the magnets can withstand without significant loss of magnetic force. Neodymium magnets have a maximum operating temperature above which they may become demagnetized.

How to determine if neodymium magnets have been demagnetized?

     One must observe its magnetism and properties to determine whether strong power neodymium magnets have been demagnetized. Loss of strength or weakening of the magnetic field may be indicative signs. However, to understand the complete guide to demagnetization, one should understand the inherent properties of magnets such as permeability and temperature tolerance. Using tools or exposing a magnet to another magnet (such as an old magnet from the North) can provide further insight into its current state.

How to remagnetize a demagnetized neodymium magnet?

1.Make sure the demagnetized magnets are at room temperature.

2.Use stronger magnets or current to expose the demagnetized magnet to a strong magnetic field.

3.Make sure the magnets are aligned with the magnetization direction.

     PS：Make sure the magnets are only heated to its Curie point. Additionally, instruments are used to measure the strength that the magnet regains after remagnetization.

     Ndfeb magnets can be divided into bonded NdFeb and sintered NdFeb. The difference between the two magnets is mainly in the production process: bonded neodymium magnet is injection molding by adding NdFeb magnetic powder to the adhesive; sintered neodymium magnet is vacuumed and molded by high temperature heating.

     1. Custom sintered neodymium magnet

     In the process of sintering magnet manufacturing, neodymium magnet powder is mixed with appropriate additives and heated by high temperature sintering process. In the sintering process, the neodymium magnet powder particles will be combined to form a stable magnetic structure, thus forming a magnet with strong magnetism. Generally, through sintering, only blank can be produced, and then through mechanical processing (such as wire cutting, slicing, grinding, etc.) to become a magnet of various shapes. Sintered NdFeb is a hard and brittle material that is difficult to process, with large loss during processing. But the advantage is that sintered magnets usually have a high magnetic force and magnetic energy product, and have good temperature stability.

     Sintered Ndfeb is generally divided into axial magnetization and radial magnetization, and the magnetization direction can be customized according to the required work needs, while sintered Ndfeb has poor corrosion resistance and is easy to oxidize, so it is necessary to deposit on its surface, common nickel plating, galvanized, epoxy plating and so on.

     2. Custom bonded neodymium magnet

     The bonded neodymium magnet is used adhesive to bond the neodymium magnet powder with other metal elements, so it is magnetic in all directions and resistant to corrosion. In the manufacturing process, neodymium magnet powder and adhesive are mixed to form a magnet by pressure or injection molding. Because it is molded by injection molding, the density is generally only 80% of the theoretical, and the magnetism is weaker than the sintered neodymium magnet. But the manufacturing method of bonded neodymium magnets allows for more complex shapes and structures, and can be used in combination with other materials.

     The above is the introduction of the difference between the production processing technology of bonded NdFeb and sintered NdFeb. Both types of custom neodynium permanent magnets have their advantages and application scenarios. Sintered magnet is commonly used in applications that require high magnetic force and temperature stability, such as engines, sensors, and nuclear magnetic resonance equipment. Bonded magnet is suitable for applications that require custom shapes and structures, such as magnetic pusher pins, magnetic labels, etc.

     In short, the manufacturing process of sintered magnet and bonding magnet is different, and the choice of the appropriate process depends on the specific application needs.

Nowadays, most industries are using high-tech and modern types of valves to enhance production and operation.

Out of all the other types of industrial valves, globe valves are widely used in the oil, gas and fuel industries.

There are many uses of this type of valve as it works to stop as well as regulate the flow of liquids. If you want to know more about globe valves and their uses, follow this article.

What Are Globe Valves?

It is a type of linear motion valve which is used in different types of industries. It is designed in a way that you can use it for throttling as well. 

It has a spherical shape like a globe and comes with a disc. The disc moves in order to block as well as allow the flow of substances. When you close the valve, the disc entirely covers the pathway to stop the flow of fluids.

However, when you open the valve, the disc moves upwards in order to clear the pathway and allows substances to flow freely. It is mostly used for isolation and throttling purposes.

This type of industrial valves has good shutoff capability. You can use it to prevent leakages. Apart from that, it also offers good throttling capacity.

The stroke is shorter, which makes it easy to use and maintain. It is available in different types and designs. 

Applications and Uses of Globe Valves:

Globe valves have many applications. It is used for industrial as well as domestic purposes. The majority of the industries with plumbing needs use this type of valve. Here are some applications and uses of globe valves. 

Cooling Water Systems:

A globe valve helps maintain the heat and cooling of the system by regulating the flow. It helps in the adjustment of the temperature of the system in relation to the demand of heat or cool by taking the measurement of the changes in pressure. As a result, a valve regulates the amount of heat produced by the boiler. 

Fuel Oil Systems: 

A Globe Valve is a very important component of fuel oil systems. It helps to prevent and control the rate at which gasoline is burnt in an engine, thus enabling the engine to maintain a constant pressure of fuel at all times. It is usually found on the side of the engine near the firewall. It has a round-shaped body and has two cones on its side. 

Chemical Feed Systems:

A Globe valve is one of the important parts of chemical feed systems. It helps in the complete process of converting the feed mixture into a liquid, and it also helps in the separation of solids from the liquid mixture. A Globe valve has a piston, and it is rotatable. In this, the piston moves up and down due to the increase and decrease in pressure. 

Boiler, Main Stem Vents and Drains:

The globe valve is used in main steam and boiler rooms and drains as well. They can be used for controlling the amount of steam that enters a room from outside, regulate the water temperature in the boiler or condensate drain, or act as a thermostatic valve. It is commonly used in the hot water tank to prevent the loss of hot water from the tank through the pipes.

Turbine Lube Oil System:

A globe valve is used in a turbine lube oil system as it allows the flow of turbine oil to be limited to a single point. The oil is pumped by means of a turbine into a sump tank that is located above the turbine.

Inspection of Stainless Steel Reducers
1. Geometry analyses of stainless steel reducers
The distribution trends of wall thickness of big and small concentric reducers are exactly the same. From the large end face to the section close to the small end face, the wall thickness changes from thin thickness to thick one. The inner hole of the small end has been turned after forming, and part of the wall thickness has been removed. However, the wall thickness of end faces of small ends is thinner than that of end faces of large ends, which is exactly the opposite of the eccentric reducer. This is caused by the manufacturing process. When the wall thickness of the axial section changes, there is obvious regularity for changes between the warp threads, but there is also a certain degree of dispersion.

2. Analyses of strength
The distribution trends of surface hardness of the large and small eccentric reducers are roughly the same, but they are not completely the same. The main difference is the hardness of the small end. The hardness of the small end of small eccentric reducers is higher, while the hardness of that of large eccentric reducers is lower. The tensile strength of the sample is 6.1% and 11% higher than the estimated strength value of the empirical formula. The yield strength and tensile strength of the sample 1 were increased by 9.0% and 2.0% respectively before production, and those of the sample 2 were increased by 26.4% and 8.8% compared with before production).