We shall take the following two factors into consideration when selecting steel, the one is the machinability of the steel, the other is the vervice character during the processing, we hope the steel has a low strength and high elongation, which make ti easy to cut, stamp or form. But in the service of steel, we hope it has high strength, good impact performance to suffer extreme service condition. For these two reasons, we should select suitable steel form its mechanical properties.  Main Mechanical Properties Include Yield Strength  The yield strength or yield point of a material is defined in engineering and materias science as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its orignal shape whem the applied stress is removed. Once the yield point is passed some fraction of the deformation will be permanent  and non-reversible.  Tensile Strength Tensile strength is indicated by the maximum stress before the break of specimen. In general, it indicates when necking will occur.  Elongation  Elongation , or percent elongation at break, is defined as  the change in gauge length after break per unit of the original gauge length. A high enlongation means the material can stand great permanet deformation before break, or high deformability.   The parameter yield strength, tensile strength, enlongation are measured by tensile test.  Impact Energy Impact energy, or toughness, is determined by the energy absorbed by the specimen during fracture in the impact test. It is measured in units of joules. Impact energy indicates material's resistance to impact load. It is tested by charpy V-notch test.  If welding is required during the process, we should consider the welding performance of the steel.  Welding  For the steel, welding is a fabrication to combine different pieces of steel together. In the welding, normally the binding sites melt together and cool to form a strong joint, such as electric arc welding, gas welding and electric resistance welding.  Weldability Weldability, also known as joinablility, of a material refiers to its alibityy to be welded. Most steels can be welded,but some are easier to weld than others. It greatly influences weld quality and is an important factor in choosing which welding process to use.   

In the transmission and transformation of electrical energy in power systems, transformers are core hub devices, and their selection directly determines the safety, stability, economy, and operation and maintenance costs of facility power supply. Dry-type transformers and oil-immersed transformers, as the two mainstream types in current industrial and civil fields, have fundamental differences in insulation medium, cooling methods, and performance characteristics, and each has different application scenarios. This article delves into the differences between the two in terms of core structure, key performance, and applicable scenarios from three dimensions and provides a scientific selection method to assist enterprises and facility managers in making the optimal decision that aligns with their specific needs.   I. Core Structural and Operational Principle Differences The core difference between dry-type transformers and oil-immersed transformers lies in the insulation medium and cooling methods, which directly determine their structural design, operational characteristics, applicable scope, and are the primary considerations in selection. A. Dry-Type TransformersDry-type transformers use air (or inert gas) as the insulation medium, where the windings are solidly insulated with epoxy resin casting, Nomex paper wrapping, among others. They do not require insulating oil for cooling and insulation but rely on the solid insulation processes. The core structure consists of iron cores, windings, insulation systems, cooling systems, and accessories. Their operation principle is based on the electromagnetic induction law: high-voltage windings connected to an AC power supply generate an alternating magnetic field, which is transferred to the low-voltage windings through the iron core. Heat dissipation is achieved through natural airflow or forced air cooling (with the addition of axial-flow fans), eliminating the need for additional cooling medium circulation systems.   Mainstream dry-type transformers are divided into epoxy resin cast and impregnated types. Epoxy resin cast transformers, known for high insulation strength, good mechanical properties, and dust and moisture resistance, are the most widely used type in the market adaptable to various complex environments. The impregnated type, with excellent heat dissipation and lightweight structure, is suitable for clean environments with high heat dissipation requirements.   B. Oil-Immersed TransformersOil-immersed transformers use mineral insulation oil (or synthetic insulation oil) as the core insulation and cooling medium. The iron core and windings are completely immersed in a sealed oil tank. In addition to the iron core and windings, the core structure includes components such as the oil tank, oil cushion, radiator, gas relay, pressure release valve, and other specialized accessories. While their operational principle is similar to dry-type transformers, heat transfer relies on natural convection or forced circulation of the insulation oil (driven by oil pumps), dissipating heat to the air through the oil tank walls and radiator. Insulation oil also functions in arc suppression, air isolation, and retarding insulation aging, ensuring long-term stable operation of the equipment. Oil-immersed transformers have three cooling methods: oil-immersed self-cooling, oil-immersed air cooling, and forced oil circulation air/water cooling. They respectively cater to small-capacity, medium-capacity, and large-capacity, high-load scenarios. Notably, forced oil circulation significantly enhances heat dissipation efficiency and meets the operational requirements of ultra-large capacity equipment.   II. Comparative Analysis of Key Performance Parameters (Professional Dimension) Starting from the core requirements of facility operation and combining with industry standards, the following professional comparisons of both types across four key dimensions — safety performance, operation and maintenance costs, environmental adaptability, and electrical performance — present a quantitative reference for selection: A. Safety PerformanceDry-type transformers have a natural fire and explosion advantage due to the absence of combustible insulating oil. They do not produce toxic gases during operation and are unlikely to cause fires even in the event of a short-circuit fault. They reach fireproof levels of F and H (resistant to temperatures of 180°C), eliminating the need for additional fire or leakage prevention facilities, making them suitable for locations with high occupancy or high fire safety requirements. The insulating oil of oil-immersed transformers is combustible. In the event of a damaged oil tank or seal failure causing oil leakage, exposure to high temperatures or ignition sources can lead to combustion and explosion, posing certain safety risks. Therefore, during installation, safety facilities such as oil reservoirs and fire extinguishing devices need to be equipped. They are unsuitable for installation in areas with high occupancies or in environments prone to combustion and explosions. Their insulation grades typically range from Class A (resistant to temperatures of 105°C), lower than that of dry-type transformers.   B. Operation and Maintenance CostsThe operational process of dry-type transformers is straightforward. Without the need for oil quality testing or oil changes, only regular dust removal, inspection of terminal connections, and winding insulation status are required. This leads to lower annual maintenance costs and extends maintenance intervals to 6-12 months, suitable for scenarios with limited professional maintenance capabilities. Oil-immersed transformers have higher maintenance requirements, necessitating regular oil quality tests (analyzing parameters like dielectric losses, moisture content, and chromatography). Insulation oil needs replacement every 3-5 years, and along with that, inspections of sealing elements, breathing apparatus silicone, gas relays, and other accessories are vital. Maintenance demands are extensive, costs are high, and a professional maintenance team is required, making them suitable for enterprises or institutions with well-developed maintenance capabilities.   C. Environmental AdaptabilityDry-type transformers are compact and leak-free, exhibiting strong adaptability to environmental humidity and dust. They can be directly installed indoors, in basements, or in restricted spaces like equipment compartments, without necessitating separate machine rooms. Particularly suitable for indoor settings like urban commercial complexes, high-rise buildings, and data centers, they can reach protection levels up to IP54 and above, shielding against dust and moisture intrusion. In contrast, oil-immersed transformers are voluminous and heavy, demanding separate machine rooms or installations on outdoor platforms or container substations. They require high installation foundation capabilities, are significantly impacted by environmental temperatures, and may require anti-freezing measures in low-temperature environments, with enhanced cooling in high-temperature settings. Additionally, insulation oil leaks may pollute soil and water sources, making them unsuitable for environments with high environmental protection standards.   D. Electrical Performance Capacity and Voltage Levels: Dry-type transformers are more suitable for low to medium capacities (typically ≤35 kV, below 20 MVA), with a capacity ceiling often not exceeding 3150 kVA. They are ideal for decentralized load supply. Oil-immersed transformers can cater to super-large capacities and ultra-high voltages (hundreds of MVA, 500 kV and above), making them the preferred choice for large-capacity centralized loads and long-distance power transmission, such as in wind power and photovoltaic step-up stations and large substations. 2. Overload Capacity: Dry-type transformers have a stronger overload capacity, capable of withstanding short-term operation at 1.2-1.5 times the rated load. With a forced air cooling system, their overload performance can be further improved, making them suitable for scenarios with large fluctuations in power load. Oil-immersed transformers generally have a lower overload capacity, typically 1.1-1.3 times the rated load, but some large-capacity units can achieve higher overload capacity through optimized cooling systems. 3. Efficiency and Noise: Both types of transformers can achieve efficiencies of 98%-99%. However, oil-immersed transformers, due to the high heat dissipation efficiency of their insulating oil, can achieve efficiencies up to 99.5% in large-capacity models, slightly better than dry-type transformers. In terms of noise, oil-immersed transformers have a noise level of 50-60 dB, lower than dry-type transformers (55-65 dB), making them more suitable for noise-sensitive applications. 4. Lifespan and Recycling Value: Under proper maintenance, oil-immersed transformers can have a lifespan of 25-30 years, and their insulating oil is recyclable, resulting in high recycling value. Dry-type transformers have a lifespan of 20-25 years, limited by the aging of solid insulation materials, resulting in lower recycling value.   III. Scenario-Based Selection Guide (Precisely Matching Facility Needs) The core of selection is "matching the actual needs of the facility." Based on the performance comparisons above and the core requirements of different scenarios, the following are clear selection recommendations, covering mainstream scenarios such as industrial, civil, and special locations: (I) Scenarios Where Dry-Type Transformers are Preferred 1. Indoor High-Density Locations: Such as commercial complexes, office buildings, hotels, hospitals, schools, subway stations, airports, etc. The core requirement is fire safety. Dry-type transformers pose no fire hazard and emit no toxic gases. They can be directly installed in areas close to the load center, such as distribution rooms and basements, saving transmission losses and simplifying fire safety approval processes. 2. Space-Constrained Areas: Such as electrical shafts in high-rise buildings, equipment mezzanines, small distribution rooms, etc. Dry-type transformers have a compact structure and small footprint. They do not require a separate machine room and can be flexibly integrated into existing equipment layouts. A subway station case shows that embedding a dry-type transformer in a cable mezzanine can save 20 square meters of equipment space. 3. Scenarios with limited operation and maintenance capabilities: such as small and medium-sized enterprises, community power distribution, small office buildings, etc. Dry-type transformers are easy to maintain and do not require a professional oil maintenance team. They only need to be cleaned and inspected regularly, which can significantly reduce operation and maintenance costs and manpower input. After an industrial park was converted to dry-type transformers, the total cost of ownership was reduced by 35% over ten years. 4. Scenarios with high fire and explosion protection and environmental protection requirements: such as chemical explosion-proof areas, data center main server rooms, hospital operating rooms, etc. Dry-type transformers are flame-retardant, explosion-proof, and leak-free, causing no environmental pollution. They can adapt to clean, high-temperature environments and meet N+1 or 2N system redundancy requirements, ensuring continuous power supply to critical equipment. (II) Scenarios where oil-immersed transformers are preferred 1. Outdoor large-capacity power supply scenarios: such as outdoor substations, industrial park distribution stations, wind power/photovoltaic booster stations, railway traction substations, etc. Oil-immersed transformers have strong weather resistance, can be installed outdoors, and can meet the requirements of large capacity and high voltage levels. In one wind power project, three 200MVA oil-immersed transformers supported the entire wind farm's grid connection and power generation. 2. Long-distance power transmission and centralized load scenarios: such as power plants, large industrial and mining enterprises (steel plants, chemical plants), rural power grids, etc. Oil-immersed transformers have high efficiency, long service life, and can withstand continuous and stable operation. They are suitable for large-capacity centralized load power supply, and the unit capacity manufacturing cost is relatively low, making them suitable for cost-sensitive projects. 3. Scenarios with professional operation and maintenance capabilities: such as professional power supply companies and large industrial enterprises, which have a complete operation and maintenance team and spare parts supply system, can meet the maintenance needs of oil-immersed transformers such as regular oil quality testing and oil replacement, and can give full play to their advantages of long life and high recycling value, thereby reducing the total life cycle cost. (III) Selection Considerations for Special Scenarios 1. Data Centers: Dry-type transformers are mandatory. They must meet fire safety requirements and employ an N+1 redundancy configuration. Some high-end data centers may opt for 2N system redundancy to ensure continuous power supply to IT equipment and prevent data loss or business interruption due to transformer failure. 2. Chemical Plants: Dry-type transformers are preferred in explosion-proof areas. Outdoor oil-immersed transformers can be used in ordinary areas, but their corrosion resistance must be improved to withstand chemical corrosion. In harsh outdoor environments such as mines and ports, weather-resistant oil-immersed transformers are preferred, with enhanced sealing and heat dissipation design. 3. High-Rise Buildings: Dry-type transformers are required for basements, rooftops, and refuge floors. Rooftop installations must use waterproof transformers, and refuge floor installations must use fire-resistant transformers to ensure compliance with building fire safety codes and avoid safety hazards. IV. Core Selection Principles and Summary The core of choosing between dry-type and oil-immersed transformers lies in balancing four key factors: safety, cost, operation and maintenance, and scenario suitability. There's no need to pursue high-end or low-priced options; the optimal choice is one that best meets the actual needs of the facility. The core principles can be summarized in three points: 1. Scenario Priority: Indoor, densely populated areas with high fire safety requirements → Dry-type transformers; Outdoor, large-capacity, long-distance power transmission → Oil-immersed transformers. This is the core premise of selection and crucial for avoiding safety hazards and resource waste. 2. Cost Balance: Dry-type transformers have a 20%-40% higher initial investment than oil-immersed transformers of the same capacity, but lower operation and maintenance costs and smaller space requirements, making them suitable for scenarios with long-term operation and limited maintenance capabilities. Oil-immersed transformers have a lower initial investment, but higher operation and maintenance costs and larger footprint, making them suitable for large-capacity scenarios requiring specialized operation and maintenance. A comprehensive consideration of the entire lifecycle cost is necessary, rather than just focusing on the initial construction cost. 3. Compliance and Adaptation: Must comply with local power regulations, fire protection regulations and environmental protection requirements. For example, indoor installations must meet fire protection standards, and outdoor installations must meet waterproof, antifreeze and anti-corrosion requirements. Special locations (such as explosion-proof areas) require the selection of dedicated models. If necessary, consult professional design institutes or equipment suppliers to develop customized solutions.   In summary, dry-type transformers offer core advantages of "safety, convenience, and environmental friendliness," making them suitable for indoor, small-to-medium capacity, and low-maintenance scenarios. Oil-immersed transformers, on the other hand, offer core advantages of "large capacity, high efficiency, and low cost," making them suitable for outdoor, large-capacity scenarios requiring specialized operation and maintenance.   When selecting a transformer, facility managers should comprehensively evaluate their facility's installation environment, load characteristics, safety requirements, and maintenance capabilities to ensure long-term stable operation and provide a reliable power supply for the facility.  

Transformer is an electrical device that uses the principle of electromagnetic induction to change alternating current voltage.   Its core structure consists of two sets of coils wound around a closed iron core. When alternating current is applied to the primary coil, an alternating magnetic field is generated in the iron core, which in turn induces an alternating voltage in the secondary coil. The voltage change depends on the turns ratio of the two coils. If the secondary coil has more turns than the primary coil, the output voltage will increase, which is called a step-up transformer; otherwise, it is a step-down transformer.   A transformer's main structure consists of three parts: Core: Typically made of laminated silicon steel sheets, forming a closed magnetic circuit. Its function is to efficiently conduct and confine the magnetic field. Primary Coil (Side): The winding connected to the input power supply. Secondary Coil (Side): The winding that outputs the required voltage. Key Characteristics and Parameters Rated Capacity: The maximum apparent output power that enables the transformer to operate safely for extended periods, measured in kilovolt-amperes (kVA). Rated Voltage: The primary and secondary operating voltages specified during design. Efficiency: The ratio of output power to input power. Modern large transformers can achieve efficiencies exceeding 99%, with losses primarily originating from copper and iron losses. Impedance voltage: An important technical parameter that affects the magnitude of short-circuit current and voltage regulation rate.   Simply put, transformers cleverly achieve the raising and lowering of AC voltage through the process of "electricity generating magnetism, and magnetism generating electricity," making them an indispensable basic component in modern power systems and almost all electronic equipment.

1. Key characteristics of ASTM standard silicon steel coilsIn the field of power transmission and conversion, silicon steel coils, as an indispensable soft magnetic material, directly determine the energy efficiency of electrical equipment such as transformers and motors. Among them, silicon steel coils conforming to ASTM standards, with their superior magnetic and mechanical properties, have become the preferred material for the manufacture of high-end electrical equipment worldwide. With the advancement of energy conservation and emission reduction policies in various countries, especially the "dual-carbon" target leading to energy transformation, the quality requirements for silicon steel coils are becoming increasingly stringent. ASTM standards, as internationally recognized specifications, provide authoritative technical guidance for the production and application of silicon steel coils. ASTM standards cover the technical requirements for non-oriented silicon steel coils, a material with low carbon content (typically below 0.020%) and a specific silicon-aluminum-iron alloy composition. The silicon content is controlled between 0.50% and 3.20%, effectively reducing eddy current losses by increasing resistivity. Silicon steel coils conforming to ASTM standards have the characteristics of low iron loss and high magnetic permeability.     2. Strict production and testing processes ensure consistent quality.The production process of ASTM standard silicon steel coils strictly adheres to specifications, requiring precise control at every stage from smelting and hot rolling to cold rolling annealing. The annealing process, in particular, effectively eliminates internal stress and optimizes grain structure, thereby improving magnetic properties. Quality control employs precision instruments such as Epstein square rings and monolithic magnetometers to measure iron loss and magnetization curves. Insulation coating testing is equally important; interlayer resistance meters assess the coating's insulation performance to ensure compliance with ASTM standards. Coating thickness is typically controlled between 0.5 and 3.0 μm, with a surface resistivity of 5-50 Ω·cm², effectively preventing eddy current losses during laminated applications.   3. ASTM standard silicon steel coils are widely used in the power industry. In transformer manufacturing, especially small power transformers, their high magnetic flux density significantly reduces no-load losses and improves energy efficiency. In electric motor applications, the isotropic properties of non-oriented silicon steel coils are suitable for manufacturing stator and rotor cores. ASTM standard silicon steel coils are also widely used in new energy vehicle drive systems, solar inverters, and wind power generation equipment. Their high magnetic flux density and low iron loss characteristics perfectly meet the stringent requirements of high-efficiency energy conversion in the renewable energy sector. The home appliance industry also benefits from this; from air conditioner compressors to refrigerator motors, ASTM standard silicon steel coils help equipment achieve higher energy efficiency standards while reducing operating noise.

The key to improving the performance of drive motors in new energy vehicles lies in the continuous innovation of electrical silicon steel materials and coating technologies. As the core material of the motor stator core, the performance of low-iron-loss laminated silicon steel directly determines the motor's energy efficiency, power density, and range.   Thinning the steel sheet is one of the most effective technical approaches to reducing iron loss. Thinner silicon steel sheets can significantly reduce high-frequency eddy current losses and improve motor efficiency.   Low-iron-loss motor laminated silicon steel is indeed a key component in improving the energy efficiency of current motor technology. Through collaborative innovation in materials, processes, and design, it provides a solid foundation for the efficient, miniaturized, and low-noise operation of motors.   Low-iron-loss motor laminated silicon steel technology is directly driving energy efficiency upgrades in several key industries, such as new energy vehicle drive motors: this is currently the most cutting-edge area of  technology application. To achieve longer range and higher power density, new energy vehicle drive motors need to maintain low losses at high speeds. The use of ultra-thin silicon steel sheets has become a standard configuration for high-end motors.   In the future, technology will continue to evolve, moving towards thinner (e.g., 0.10mm and below), higher strength, and even integration with sensors to achieve intelligent status monitoring, providing continuous material support for the "dual carbon" goal.  

Non-oriented silicon steel with a thickness between 0.2 mm and 0.35 mm is a key material for core components of new energy vehicles, such as drive motors and on-board chargers, and directly affects the vehicle's power, economy, and reliability.   Why is silicon steel so crucial? New energy vehicle drive motors strive for miniaturization, high efficiency, and high power density. This places extremely high demands on their "heart" material—silicon steel. High frequency and low loss: When the motor rotates at high speed (up to tens of thousands of revolutions per minute), the internal magnetic field changes at a very high frequency (400-1500Hz). The thinner the silicon steel sheet, the lower the eddy current loss, the higher the motor efficiency, and the more guaranteed the driving range. Studies have shown that compared to 0.35mm silicon steel, motors using 0.30mm silicon steel can increase the high-efficiency area by more than 20%.   High magnetic flux density: High magnetic flux density means that the motor can generate a stronger magnetic field under the same current, thereby obtaining greater torque and power density, which helps to achieve motor weight reduction.   Application scenarios: New energy silicon steel with a thickness of 0.30mm-0.35mm has good cost-effectiveness, meets basic performance requirements, and is generally used in the auxiliary motors of some A0-class electric vehicles and hybrid vehicles. New energy silicon steel with a thickness of 0.25mm-0.27mm has the characteristics of balancing performance and cost, low iron loss and high magnetic induction, and is the current mainstream stator core for electric vehicle drive motors.   New energy silicon steel with a thickness of 0.20mm or less features extremely low iron loss, optimal high-frequency performance, and suitability for ultra-high speeds. It is generally used in high-performance motors with speeds ≥15000rpm.   The thinness of silicon steel is primarily to address the challenges posed by the increasing frequency of drive motors. Higher motor speeds result in higher frequencies of internal magnetic field changes, leading to significant eddy current losses in the silicon steel sheets. Using thinner silicon steel sheets (such as 0.25mm or 0.20mm) effectively suppresses eddy currents and reduces iron losses, thereby improving motor efficiency. This is crucial for extending vehicle driving range.    

Ultra-thin silicon steel (especially 0.1-0.2mm thick) is a core material for drive motors in new energy vehicles, and its technical level directly affects the efficiency, power density, and overall vehicle performance of the motor. 1. Improved energy efficiency: Generally speaking, the thinner the silicon steel sheet, the lower the eddy current loss. For example, reducing the thickness of the silicon steel sheet from 0.5mm to 0.1mm can reduce eddy current loss to 1/25 of the original. Therefore, new energy vehicle motors made of ultra-thin silicon steel can reduce energy waste and extend the driving range.   2. Power density: Thinner silicon steel allows motors to operate at higher speeds, thus increasing power density. For example, motors using 0.1mm ultra-thin silicon steel can reach speeds of up to 31,000 rpm. Motors made with ultra-thin silicon steel output more power in the same volume, or reduce motor size for the same power, contributing to vehicle weight reduction.   3.  Reduce iron loss: Iron loss is a key indicator for measuring the energy loss of silicon steel sheets. Ultra-thin silicon steel has a lower iron loss value, which can directly reduce the heat generation and energy waste during motor operation, and help improve output power and range.   Ultra-thin silicon steel is a crucial component in the performance race of new energy vehicles. As material thickness continues to decrease to 0.1mm and below, the motors in new energy vehicles will become more powerful, efficient, and compact. The development of ultra-thin silicon steel continues, with a clear trend towards thinner, higher-performance (lower iron loss, higher strength) and broader applications (expanding from new energy vehicles to low-altitude aircraft, humanoid robots, etc.).   Shungesteel now offers ultra-thin silicon steel with a thickness of 0.1-0.2 mm, suitable for use in electric motors for new energy vehicles, providing high-quality material solutions for manufacturers of high-performance electric motors for new energy vehicles.Welcome to learn more.  

Ultra-thin silicon steel (0.1-0.2mm) is a key material driving robotics technology toward high performance and precision, and is indispensable, especially in advanced robotic systems that require high power density, fast response and precise positioning.   Ultra-thin silicon steel is mainly used in the following core components of robots, making it an ideal material for their "power heart".   Joint motors: The movements of multiple joints in a humanoid robot, such as the neck, waist, and fingers, rely on joint motors for power and precise control. A single humanoid robot can contain up to 50 motors. Motors made of ultra-thin silicon steel can output powerful torque in a very small volume and achieve millisecond-level response speeds, making the robot's movements more flexible and human-like.     Dexterous Hands and Coreless Motors: Dexterous hands in robots require more precise motors, such as coreless motors and frameless torque motors. Ultra-thin silicon steel can meet the manufacturing requirements of coreless motors for dexterous hands, which are only 6 millimeters in size, and is the foundation for achieving fine finger manipulation.   The superior performance of ultra-thin silicon steel stems from the fundamental advantages of its physical properties:   Minimizing Iron Loss: Silicon steel sheets experience energy loss (iron loss) due to eddy currents in alternating magnetic fields, which is dissipated as heat. Eddy current loss is proportional to the square of the steel sheet thickness. Reducing the thickness of silicon steel sheets from the traditional 0.35mm or 0.5mm to 0.1mm or 0.2mm, creating ultra-thin silicon steel, significantly reduces iron loss.     Achieving High Power Density and Miniaturization: Using ultra-thin silicon steel allows for the manufacture of smaller and lighter motors with the same power output. This is crucial for robot joints where space is extremely limited, directly contributing to their miniaturization and weight reduction.   Shunge Steel now offers ultra-thin silicon steel with a thickness of 0.1-0.2 mm, providing material solutions for high-performance robot manufacturers. Welcome to learn more.  

Ultra-thin silicon steel and self-adhesive coating technology are core technologies in the manufacturing of high-end motors and transformers. Their combined application is driving the development of products in fields such as new energy vehicles and power electronics towards higher efficiency, higher power density, and lower noise. When ultra-thin silicon steel is combined with self-adhesive coating technology, a synergistic effect of "1+1>2" can be achieved, with the main advantages being: 1. Significantly Reduced Losses in Ultra-Thin Silicon Steel Cores: Self-adhesive coating technology avoids the mechanical stress and localized short circuits associated with traditional welding and riveting through overall bonding, thus better preserving the excellent magnetic properties of ultra-thin silicon steel. Tests show that compared to welded cores, self-adhesive cores can reduce iron losses by approximately 5% and excitation current by 9%. 2. Effectively reduces vibration and noise: The self-adhesive coating technology effectively suppresses vibration transmission between silicon steel sheets, resulting in better overall core integrity. Data shows that the noise generated by a self-adhesive core can be approximately 5 dB lower than that of a welded core.   3. Facilitating Miniaturization and Weight Reduction: Self-adhesive technology eliminates or reduces the use of traditional fasteners (such as end plates and pressure rings), maximizing the effective length of the core within a limited space, thus achieving a smaller volume for the same power output. These advantages make this technology combination ideal for applications with stringent requirements for efficiency, size, and noise, such as drive motors for new energy vehicles, high-end home appliance compressors, drone power systems, ultra-high voltage transformers, and precision power electronic equipment. Shunge Steel now offers ultra-thin silicon steel with a thickness of 0.1-0.2mm, as well as axial cores made from ultra-thin silicon steel using self-adhesive coating technology. Welcome to learn more.

Axial cores are a special type of core used in motors or transformers, the raw material is usually silicon steel, characterized by magnetic flux (magnetic field) primarily distributed along the rotational axis or axial direction of the device. This contrasts sharply with common radial cores (where magnetic flux is distributed radially).   Compared to traditional silicon steel, the application of ultra-thin silicon steel in axial cores does indeed bring a series of significant advantages, mainly due to the improvement in its physical and electromagnetic properties. The application of ultra-thin silicon steel in axial cores is one of the key technologies for achieving high-frequency, high-efficiency, and miniaturized motors and transformers. Advantages: 1. In terms of electromagnetic performance, ultra-thin silicon steel is applied to the axial core. Due to the extremely thin thickness of ultra-thin silicon steel, the eddy current flow path is restricted, and the loop resistance is increased. Moreover, ultra-thin silicon steel itself has a low iron loss value, which can significantly reduce iron loss (especially eddy current loss) compared with traditional silicon steel, and improve the efficiency of motors/transformers. 2. In terms of structural design, axial cores made of ultra-thin silicon steel generally use self-bonding technology. Self-bonding technology uses special adhesives to solidify the silicon steel sheets as a whole, avoiding the damage to the material caused by traditional riveting/welding. 3. In terms of thermal management, the axial core made of ultra-thin silicon steel uses self-adhesive technology, and the self-adhesive coating fills the gaps between the sheets, forming an efficient axial heat conduction path; while the low iron loss characteristics of ultra-thin silicon steel can reduce heat generation from the source. In summary, ultra-thin silicon steel, applied to axial cores through special material processing and structural design, offers significant advantages in reducing high-frequency losses, increasing power density, optimizing heat dissipation, and improving NVH performance. This makes it highly suitable for the stringent requirements of high-efficiency, compact size, and high performance in current high-end motors and transformers.

Silicon steel is extremely important, it is not only a cornerstone material for the modern power and electronics industries, but is also hailed as an "artwork" and a "jewel in the crown" among steel products.With technological advancements and the demands of industrial development, silicon steel has gradually moved towards ultra-thin designs. Ultra-thin silicon steel with a thickness between 0.1 mm and 0.2 mm is an indispensable core material for many cutting-edge high-end equipment. Its value mainly stems from a key physical property: the eddy current loss of silicon steel sheets is proportional to the square of their thickness. This means that when the thickness is reduced from the conventional 0.35 mm or 0.5 mm to 0.1 mm, the eddy current loss can be significantly reduced to 1/25 or even lower, thereby greatly improves the energy conversion efficiency and high-frequency performance of motors made from CRNGO materials.Application fields: 1. New energy vehicle drive motors: The high efficiency of ultra-thin silicon steel enables new energy vehicle motors to extend their driving range, and its high power density can further reduce the size of the motor. Extremely low iron losses also result in higher energy efficiency, supporting ultra-high motor speeds (such as 31,000 rpm), thereby increasing power density. 2. Humanoid robot joint motors: Humanoid robot joint motors require miniaturization, lightweight, high precision, and fast response. The ultrathin thickness of ultra-thin silicon steel meets the stringent requirements of micro joint motors such as hollow cups and frameless torque motors in tiny spaces; moreover, its high magnetic induction ensures strong and precise power output. 3. Drones/eVTOL: This type of motor needs to operate at extremely high speeds (medium-high frequencies, such as 400-1000Hz) and requires extremely light weight. The excellent iron loss characteristics of ultra-thin silicon steel at medium-high frequencies ensure that the motor maintains low loss and high efficiency at high speeds, directly improving the aircraft's endurance and maneuverability; The level of research and development and industrialization of ultra-thin silicon steel is becoming an important indicator of a country's competitiveness in high-end manufacturing and emerging industries. Today, Shunge Steel can provide manufacturers in high-end manufacturing and emerging industries with solutions for ultra-thin silicon steel materials, and can also provide ultra-thin silicon steel in various thicknesses. Welcome to inquire and learn more.

Ultra-thin silicon steel (with a thickness between 0.1 mm and 0.2 mm) is one of the core materials for current motor technology innovation. Its core advantage lies in achieving a "double" increase in motor energy efficiency, power density, and overall performance through "thinning" of the physical thickness. • Improve energy efficiency and reduce iron losses. In motors, silicon steel sheets generate eddy currents due to electromagnetic induction, causing energy to be lost as heat; this loss is called iron loss. Ultra-thin silicon steel sheets can effectively limit the generation path of eddy currents, thereby significantly reducing iron losses. •Achieving Miniaturization and Lightweighting Ultra-thin silicon steel directly leads to the miniaturization and light weighting of both the material itself and the final application products. Higher Power Output in the Same Volume: For applications highly sensitive to space and weight, such as drones, humanoid robots, and low-altitude aircraft, using 0.1 mm or 0.2 mm ultra-thin silicon steel allows motors to output higher power in the same volume, or to make the motor smaller and lighter while maintaining power. This is crucial for improving equipment mobility and endurance, meeting the demands of high-end applications. •Core Advantages of Ultra-thin Silicon Steel in Different Application Scenarios New Energy Vehicle Drive Motors: Its core advantage lies in low iron loss, improving motor efficiency, extending vehicle range, and making energy utilization more efficient. Drone/eVTOL Motors: The core advantage of ultra-thin silicon steel lies in its excellent high-frequency performance, supporting miniaturization and light weighting, increasing motor speed and power density, and providing devices with better maneuverability and longer flight time. Humanoid Robot Joint Motors: The core advantage of ultra-thin silicon steel in this area is its high magnetic induction and low iron loss, supporting precision control and miniaturization, providing the power foundation for precise movements of joints such as dexterous hands and waists, and contributing to improved motion performance. Shunge Steel can now provide you with ultra-thin silicon steel in various specifications with thicknesses ranging from 0.1 to 0.2 mm. Welcome to inquire.