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Non-oriented electrical silicon steel, also known as silicon steel or electrical steel, is a type of soft magnetic material that is widely used in the production of electrical equipment, particularly in the construction of transformers. The term “non-oriented” refers to the fact that the steel is not directionally oriented during its production, unlike grain-oriented electrical steel.
| Class | Nominal Thickness (mm) | Theoretical Density (kg/dm3) | Core Loss Value P15/50 (W/kg) | Specified Value of Magnetic Flux Density Peak Value B50 (T) | Specified Value of Stacking Coefficient |
| 35WW250 | 0.35 | 7.60 | 2.30 | 1.62 | 95.0 |
| 35WW270 | 7.65 | 2.50 | |||
| 35WW300 | 2.70 | – | |||
| 35WW360 | 3.00 | 1.63 | |||
| 35WW400 | 3.60 | 1.64 | |||
| 35WW440 | 7.7 | 4.00 | 1.65 | ||
| 50WW250 | 0.5 | 7.60 | 2.30 | 1.62 | 97.0 |
| 50WW270 | 2.50 | 1.65 | |||
| 50WW290 | 2.70 | 1.62 | |||
| 50WW310 | 7.65 | 2.90 | 1.62 | ||
| 50WW350 | 3.10 | 1.62 | |||
| 50WW400 | 3.50 | 1.63 | |||
| 50WW470 | 7.70 | 4.00 | 1.64 | ||
| 50WW600 | 0.5 | 7.75 | 4.70 | 1.66 | 97.0 |
| 50WW700 | 7.80 | 6.00 | 1.67 | ||
| 50WW800 | 7.00 | 1.68 | |||
| 50WW1000 | 7.85 | 8.00 | 1.70 | ||
| 50WW1300 | 10.00 | 1.72 |
Here are some key features of non-oriented electrical silicon steel coils for transformers:
Low Core Losses: Non-oriented electrical steel has low core losses, which are the energy losses that occur in the core of a transformer due to hysteresis and eddy current effects. This property makes it highly efficient for use in transformers, as it helps to minimize energy losses and improve the overall performance of the device.
High Magnetic Permeability: Non-oriented electrical steel has high magnetic permeability, which means it can efficiently conduct magnetic flux. This is important for transformers, as it allows for the effective transfer of energy between the primary and secondary windings of the transformer.
Good Punchability: Non-oriented electrical steel is easy to punch or stamp into specific shapes and sizes without significant deformation. This makes it ideal for use in the production of transformer cores, as it allows for efficient production and assembly.
High Electrical Resistance: Non-oriented electrical steel has high electrical resistance, which helps to minimize electrical losses within the transformer.
Uniform Magnetic Properties: Non-oriented electrical steel has uniform magnetic properties in all directions, which means it can be used in any orientation. This is in contrast to grain-oriented electrical steel, which has directional magnetic properties and is used in applications where the magnetic field is always in the same direction.
Power Transformers: widely employed in power transformers due to their low core losses and high magnetic permeability. Power transformers are essential components in electrical power transmission and distribution networks, where they step-up or step-down voltage levels to facilitate efficient electricity transfer.
Distribution Transformers: also used in distribution transformers, which are responsible for reducing the voltage from transmission lines to levels suitable for commercial and residential use. The high efficiency and low losses of non oriented electrical silicon steel coils contribute to the overall efficiency of distribution transformers.
Instrument Transformers: Instrument transformers, such as current transformers and voltage transformers, are crucial for measuring and protecting electrical systems. This type is commonly employed in the cores of these transformers to ensure accurate and reliable measurement of current and voltage levels.
Inductive Components: can be used in the manufacturing of various inductive components, including inductors, chokes, and reactors. These components are found in a wide range of electrical and electronic devices, such as power supplies, motor drives, and electronic ballasts.
Magnetic Amplifiers: Magnetic amplifiers are devices that utilize the magnetic properties of materials, such as non oriented electrical silicon steel, to amplify electrical signals. The low core losses and high magnetic permeability of the coil make it suitable for use in magnetic amplifiers, enabling efficient signal amplification.
High-Power Electrical Equipment: widely utilized in high-power electrical equipment, such as large motors, generators, and electrical machinery. The high efficiency and superior magnetic properties of the coil aid in minimizing energy losses and improving the performance of these equipment.
