Professional Transformer Core Lamination Suppliers
Precise Electrical Steel Laminations for Transformer Cores
The world is moving toward a more sustainable future. As we transition to a decarbonized and electrified economy, the need for efficient transformer cores is more important than ever. Yeson Steel’s premium grain-oriented electrical steel laminations deliver lower core loss and higher performance, making them the perfect choice for a variety of applications, from standard E’s and I’s laminations to large transformer cores. With our advanced technologies and expertise, we can provide you dimensionally precise stampings to create the higher performing transformer cores that are essential for a sustainable future.
Experience the Innovation and Expertise of Tempel
Material Sourcing Expertise
We are the electrical steel sourcing and metallurgical experts for Non-Grain Oriented (NGO), Grain Oriented (GO), and Cold Rolled Motor Lamination (CRML) steel, with the knowledge and resources to help you select, buy, and source the right material for your application.
Advanced Stamping and Value-Added Capabilities
We have an exceptional range of highly advanced progressive and large blank and notch stamping capabilities in the world, and we’re uniquely positioned to handle simple to complex production requirements. We also provide critical value-added services including welding, cleating, die-casting, deburring, recoating, and laser cutting.
On-Time, In-Full Delivery
Our high-volume facilities are built for quality and efficiency. We deliver your orders on time, in full, every time.
Transformer Cores Performance and Efficiency
Boost transformer performance and cut manufacturing costs with precision lamination solutions that reduce core loss and amplify transformer efficiency.
Technical Support
Our design and engineering team is your trusted partner for product development. We'll work with you and your team from ideation to manufacturing, no matter where you are in the world.
Transformer Cores and E's and I's Laminations Engineered for Excellence
Achieve higher performance and efficiency in transformer core applications with YesonSteel’s precise electrical steel lamination stampings. Our range of transformer cores and E’s and I’s laminations are engineered to meet each customer’s individual needs, ensuring you get the perfect solution for your application.
By Stamping Capabilities
Miter Core E & I Step Lap/Miter Core DG (Wound) Core Cut to Length
E & I
Instrument and Small Industrial Applications Lighting Fuel-fired Ignition Transformers Small Electronics Buck-Boost Transformer Impedance Matching
Step Lap/Miter Core
Larger Power Handling Capability Power Transformers 3 Phase Pad Mount Utility Transformers PDU’s Electric Vehicle Charging Distribution Transformers (Pole Mount, Pad Mount, Dry and/or Liquid Filled) Small and Medium Voltage/Power Transformers for Residential and Light Commercial Use VFD Drives / Servo Drives – DIT's
Distributed Gap Wound Core
Power Transformers 3 Phase Pad Mount Utility Transformers Power Distribution Units (PDU’s) Electric Vehicle Charging Distribution Transformers (Pole Mount, Pad Mount, Dry and/or Liquid-Filled) Small and Medium Voltage/Power Transformers for Residential and Light Commercial Use VFD Drives / Servo Drives – DIT's
Cut to Length
Dry Type Transformers Harmonic Mitigating Transformers Rectifying Transformers
EI Core Lamination
EI laminations are one of the most popular design types for manufacturing single phase transformers. The simple, single coil layout (sometimes referred to as a “shell type” transformer) offers a cost effective method for producing a wide variety of transformers. These range from small PCB mounted units through to much larger types that may be found in control panels or stand alone enclosures.
Electrical Steel Technologies and Engineering for Transformer Laminations
We’re more than an electrical steel laminations supplier; we’re a strategic partner in the quest to optimize your products. With our leading-edge solutions in processing, stamping, and engineering, we can help you improve product performance, efficiency, and reliability.
EI Core Lamination Features
•Low iron loss, high magnetic flux strength, comes up to the international advance standard.
•Slight thickness difference between the horizontal and the longitudinal direction, promising the high lamination factor.
•Processing Performance: Easily punched and cut, high dimensional accuracy.
•Insulating Coating: Uniform color, good insulation, strong adhesive, high heat resistance, high putrescibility.
•Smooth surface, no rust, no rolling marks, no cold lap, no crease, no bubble cell, no delamination defects.
•Low iron loss, high magnetic flux strength, comes up to the international advance standard.
EI Core Lamination Features
Control Transformer
Power Transformer
Ballast Resistor
UPS
Charger
•Marked “*” model is manufactured by manually punch
•Calculate core area using transformer specifications.
•Choose core size to fit winding and bobbin.
•Minimize air gap for higher magnetic flux density.
•Optimize core size for low core loss and reduced heat generation.
•Consider manufacturing limitations and cost when selecting core size.
| Type | a | b | c | d | e | f | Holes | ø | Gap |
|---|---|---|---|---|---|---|---|---|---|
| EI-30 | 30 | 5 | 5 | 10 | 15 | ||||
| EI-35 | 35 | 5 | 7.5 | 10 | 19.5 | ||||
| EI-40 | 40 | 6.65 | 8 | 10.7 | 20.5 | 7 | 2(PH) | ||
| EI-41 | 41 | 6 | 8 | 13 | 21 | ||||
| EI-42 | 42 | 7 | 7 | 14 | 21 | 2 | 3.5 | 0.45 | |
| EI-48 | 48 | 8 | 8 | 16 | 24 | ||||
| EI-48 | 48 | 8 | 8 | 16 | 24 | 2 | |||
| EI-48 | 48 | 8 | 8 | 16 | 24 | 2 | 3.5 | ||
| EI-50 | 50 | 8 | 9 | 16 | 25.5 | ||||
| EI-57 | 57 | 9.5 | 9.5 | 19 | 28.5 | ||||
| EI-57 | 57 | 9.5 | 9.5 | 19 | 28.5 | 4(MH) | 4 | ||
| EI-60 | 60 | 10 | 10 | 20 | 30 | 4 | 5 | ||
| EI-66 | 66 | 11 | 11 | 22 | 33 | ||||
| EI-66 | 66 | 11 | 11 | 22 | 33 | 4 | 4 | ||
| EI-66 | 66 | 11 | 11 | 22 | 33 | 4 | 4 | 0.7/0.8/0.9 | |
| EI-67 | 67 | 9.45 | 13.05 | 22 | 4 | 0.7 | |||
| EI-75 | 75 | 12.5 | 12.5 | 25 | 37.5 | 4 | 5 | ||
| EI-76.2 | 76.2 | 12.7 | 12.7 | 25.4 | 38.1 | 4 | 5.5 | fillet | |
| EI-76.2 | 76.2 | 12.7 | 12.7 | 25.4 | 38.1 | 4 | 5 | T=1.0 T=1.4 | |
| EI-78 | 78 | 13 | 13 | 26 | 39 | 4 | 5 | ||
| EI-84 | 84 | 14 | 14 | 28 | 42 | 4 | 6 | ||
| EI-85.8 | 85.8 | 14.3 | 14.3 | 28.6 | 42.9 | 4 | 5 | ||
| EI-85.8 | 85.8 | 14.3 | 14.3 | 28.6 | 42.9 | 4 | 5 | 1.3/1.6/1.8/2.0/1.2/1.0/2.4/0.9/0.7 | |
| EI-95.25 | 95.25 | 15.875 | 15.875 | 31.75 | 47.625 | 4 | 5.5 | fillet | |
| EI-96 | 96 | 16 | 16 | 32 | 48 | 4 | 6 | ||
| EI-96 | 96 | 16 | 16 | 32 | 48 | 4 | 6 | 1.0/1.4/2.5/2.7 | |
| EI-105 | 105 | 17.5 | 17.5 | 35 | 52.5 | 4 | 6 | ||
| EI-105 | 105 | 17.5 | 17.5 | 35 | 52.5 | 4 | 6 | 1.0/1.4/1.6/2.0/2.2/2.8 | |
| EI-108 | 108 | 18 | 18 | 36 | 54 | 4 | 6 | ||
| EI-114 | 114 | 19 | 19 | 38 | 57 | 4 | 7 | ||
| EI-114 | 114 | 19 | 19 | 38 | 57 | 4 | 7 | 2.7 | |
| EI-120 | 120 | 20 | 20 | 40 | 60 | 4 | 7 | ||
| EI-122 | 122 | 22 | 28 | 22 | 61 | 28 | 4 | 6 | |
| EI-126 | 126 | 21 | 21 | 42 | 63 | 4 | 7 | ||
| EI-133.2 | 133.2 | 22.2 | 22.2 | 44.4 | 66.6 | 4 | 7 | ||
| EI-133.2 | 133.2 | 22.2 | 22.2 | 44.4 | 66.6 | 4 | 7 | 1.3 | |
| EI-150 | 150 | 25 | 25 | 50 | 75 | 4 | 8 | ||
| EI-152.4 | 152.4 | 25.4 | 25.4 | 50.8 | 76.2 | 4 | 8 | ||
| EI-162 | 162 | 27 | 27 | 54 | 81 | 4 | 8 | ||
| EI-162 | 162 | 27 | 27 | 54 | 81 | 4 | 10 | ||
| EI-168 | 168 | 28 | 28 | 56 | 84 | 4 | 10 | ||
| EI-171 | 171 | 28.5 | 28.5 | 57 | 85.5 | 4 | 8(PH)10 | ||
| EI-174* | 174 | 29 | 29 | 58 | 87 | 4 | 10.5 | ||
| EI-180 | 180 | 30 | 30 | 60 | 90 | 4 | 8 | ||
| EI-180 | 180 | 30 | 30 | 60 | 90 | 4 | 10 | ||
| EI-190.5 | 190.5 | 31.75 | 31.75 | 63.5 | 95.25 | 4 | 8 | ||
| EI-192 | 192 | 32 | 32 | 64 | 96 | 4 | 10 | ||
| EI-210 | 210 | 35 | 35 | 70 | 105 | 4 | 10 | ||
| EI-222* | 222 | 37 | 37 | 74 | 111 | 4 | 10 | ||
| EI-228 | 228 | 38 | 38 | 76 | 114 | 4 | 10 | ||
| EI-228(PH)* | 228 | 38 | 38 | 76 | 76 | 4 | 9.5 | ||
| EI-240 | 240 | 40 | 40 | 80 | 120 | 4 | 10 | ||
| EI-254 | 254 | 48 | 55 | 48 | 164 | 4 | 12 | ||
| EI-270* | 270 | 45 | 45 | 90 | 135 | 4 | 12 | ||
| EI-300 | 300 | 50 | 50 | 100 | 150 | 4 | 12 | ||
| EI-360* | 360 | 60 | 60 | 120 | 180 | 4 | 12 | ||
| E70(NS)* | 222 | 38 | 38 | 70 | 111 | 4 | 10 | ||
| EI-28(NS)* | 59 | 14 | 14 | 28 | 45 | 4 | 5 | ||
| EI-56(NS)* | 200 | 28 | 44 | 56 | 69 | 4 | 12 | ||
| EI-60(NS)* | 180 | 30 | 30 | 60 | 180 | 4 | 10 | ||
| EI-150(NS)* | 150 | 25 | 25 | 50 | 95 | 4 | 8 | ||
| EI-60(NS)* | 210 | 37.5 | 37.5 | 60 | 210 | 4 | 10 | ||
| EI-162(NS)* | 146.05 | 20.6 | 31.8 | 41.3 | 66.8 | 4 | 5.5 | ||
| EI-251(NS)* | 228.6 | 31.75 | 50.8 | 63.5 | 139.7 | 6 | 9.5 |
Our Products
Scope:Power Transformer,Ballast Resistor,UPS,Charger,Control Transformer
Scope:Power Transformer; Ballast Resistor, UPS, Phone Charger
Scope: Double Coil Coating Power Transformer
Scope:Engineering Transformer and High-power Transformer in AC voltage mode
Scope:Lighting Product,Energy saving lamp,Transform and Rectifier of metal halide lamp
Scope:Iron Core of Electric Reactor
Why Choose Us ?
Specialized in the production of a variety of standard and non-standard series EI lamination, three-phase core, core ballasts, TL core series and a variety of reactor core products.
YesonSteel has more than 20 years of professional experience. There are about 30 quality monitoring people among 200 employees. Provides high quality products to the customers worldwide (including Fortune 500).