EI Silicon Steel Lamination

Silicon Content : generally below 4.5%

Manufacturing Process : cutting and stacking

Applications : power, electrical, and military industries

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Introduction:

EI silicon steel lamination, also known as EI electrical steel lamination, is a type of silicon steel widely used in the production of electrical transformers, inductors, and other electromagnetic devices. They are made from high-quality thin silicon steel sheets that are assembled to form the “EI” shape, which exhibits superior magnetic properties. The “EI” designation refers to the shape of the lamination, which is typically in the form of stacked E and I-shaped sheets.

Significance of EI Silicon Steel Lamination

The use of EI silicon steel lamination is critical in the design of efficient and reliable electrical equipment.

On one hand, the lamination serves as the core, providing a low-reluctance path for the magnetic flux generated by the primary winding. This allows for efficient energy transfer from the primary to the secondary winding, minimizing energy losses and ensuring performance. On the other hand, the laminations are insulated from each other to prevent the formation of eddy currents, which can lead to energy losses and heat generation.

Manufacturing Process of EI Silicon Steel Lamination

The manufacturing process of EI silicon steel lamination involves several key steps:

1. Material Selection: High-quality silicon steel with a specific silicon content is chosen for its excellent magnetic properties.

2. Annealing: The silicon steel is annealed to align its magnetic domains, which enhances its magnetic properties.

3. Stamping: The annealed steel is then stamped into the desired E and I shapes, which are then stacked together to form the lamination.

4. Insulation Coating: The laminations are coated with an insulating material to prevent the formation of eddy currents, which can cause energy losses.

5. Assembly: The laminations are assembled into the transformer core, along with the windings and other components.

Parameter:

Here are the specifications of regular EI silicon steel lamination in stock at Gnee Factory:

Part 1: Single-phase EI Silicon Steel Lamination

No.	Product Name	Total Height (mm)	Total Length (mm)	Foot Length (mm)
1	EI-28	25	28	21
2	EI-30	25	30	20
3	EI-35	29.5	35	24.5
4	EI-38.4	32	38.4	25.6
5	EI-41	33	41	27
6	EI-41-2H/4H	33	41	27
7	EI-42-4H	35	42	28
8	EI-48	40	48	32
9	EI-48-2H/4H	40	48	32
10	EI-54	45	54	36
11	EI-57	47.5	57	38
12	EI-57-2H/4H	47.5	57	38
13	EI-60-4H	50	60	40
14	EI-66	55	66	44
15	EI-66-2H/4H	55	66	44
16	EI-75-4H	62.5	75	50
17	EI-76.2-4H	63.5	76.2	50.8
18	EI-78-4H	65	78	52
19	EI-84-4H	70	84	56
20	EI-85.8-4H	71.5	85.8	57.2
21	EI-96-4H	80	96	64
22	EI-101-4H	82.5	101	66.5
23	EI-114-4H	95	114	76
24	EI-105-4H	87.5	105	70
25	EI-120-4H	100	120	80
26	EI-133.2-4H	111	133.2	88.8
27	EI-150-4H	125	150	100
28	EI-152.4-4H	127	152.4	101.6
29	EI-162-4H	135	162	108
30	EI-168-4H	140	168	112
31	EI-180-4H	150	180	120
32	EI-190.5-4H	158.75	190.5	127
33	EI-228.6-4H	190.5	228.6	152.4
Remark: 1. Pattern and naming: no hole(EI-XX); Single Middle-punched(EI-XX-2H); 4 holes(EI-XX-4H) 2. Tolerance: ±10mm.

EI Silicon Steel Lamination Parameter

Part 2: Three-phase EI Silicon Steel Lamination

No.	Product Name	Total Height (mm)	Total Length (mm)	Foot Length (mm)
1	EI-three phase-30CORE-150	135	150	105
2	EI-three phase-38.1CORE-190.5	171.45	190.5	133.35
3	EI-three phase-45.8CORE-228.6	205.7	228.6	160
4	EI-three phase-50CORE-250	250	250	200
5	EI-three phase-50CORE-250	300	300	240
Remark: 1. Pattern and naming: Unpunched(EI-XX) 2. Tolerance: ±10mm.

Features

Application Areas

EI silicon steel lamination exhibits several key properties that make it ideal for various electrical applications:

1. High Permeability. The key property of EI silicon steel laminations is their high magnetic permeability, which allows them to efficiently transfer electrical energy between two coils.

2. Low Core Losses. They also have lower core losses, which means that they save more energy as heat during operation.

3. Good Insulating Properties. The insulating coating on the laminations prevents the formation of eddy currents, further reducing energy losses.

4. Mechanical Strength. The lamination’s stacked design provides mechanical strength, which is necessary to withstand the forces and vibrations experienced during transformer operation.

5. Noise Reduction. It helps reduce noise and vibration in electrical equipment by minimizing variations in magnetic flux density and ensuring smooth and consistent magnetic performance.

6. High Stacking Coefficient. The surface of ei silicon steel lamination is smooth, flat, and uniform in thickness, and the stacking coefficient of the manufactured iron core is improved.

7. Processing Performance. It can be easily punched and cut with high dimensional accuracy.

8. Improved Energy Efficiency. By minimizing energy losses, transformers constructed with EI silicon steel laminations help to improve the energy efficiency of electrical systems.

Key applications for EI silicon steel laminations include:

1. Transformers. EI silicon steel laminations are used to make the cores of transformers and are responsible for transferring electrical energy from one circuit to another.

2. Electric motors and generators. They are used to build the stator and rotor cores of electric motors and generators, which convert electrical energy into mechanical energy and vice versa.

3. Inductors. Inductors, which are passive electronic components that store energy in the form of a magnetic field, also benefit from the use of EI silicon steel lamination.

4. Chokes and reactors. Chokes and reactors, which are types of inductors used in power electronics and electrical systems, often utilize EI silicon steel lamination in their construction.

5. Magnetic Amplifiers. The high permeability of EI silicon steel lamination in magnetic amplifiers allows for precise control of the magnetic flux, making it an ideal material for magnetic amplifiers.

6. Power Supplies. Power supplies, which convert electrical power from one form to another, often incorporate EI silicon steel lamination in their design. Its high permeability and low core losses contribute to the overall efficiency of power supplies, allowing for the conversion of power with minimal losses.