Self-adhesive Silicon Steel High Speed Motor Laminating Technology

​In high-end manufacturing fields such as new energy vehicles and industrial robots, performance breakthroughs in high-speed motors have become the core of industry competition. Self-adhesive silicon steel lamination technology, with its revolutionary process advantages, is becoming the focus of competition among global motor manufacturers. This article will deeply analyze the core process, performance advantages and global application trends of this technology, and provide cutting-edge technology references for the industry.

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Self-adhesive silicon steel lamination technology: redefining motor core manufacturing

Traditional motor cores are mostly welded, riveted or mechanically fastened, which have pain points such as high eddy current loss, high vibration noise, and low assembly efficiency. Self-adhesive silicon steel technology completely subverts traditional processes by coating special adhesives on the surface of silicon steel sheets, and forming seamless integral cores after lamination and curing.

Core process flow:

Silicon steel sheet pretreatment

Precision cleaning to remove surface oil and ensure adhesive adhesion stability.

Adhesive coating

Spraying or dipping process is used to evenly cover both sides of the silicon steel sheet with nano-level self-adhesive coating.

Lamination and hot pressing curing

​​Accurate stacking by automated lamination robots, combined with rapid curing at 180°C, to form a dense structure.

Post-processing optimization

​​Laser cutting trimming, vibration aging to eliminate residual stress, and ensure dimensional accuracy of H8 level.

Development Trend of Motor Lamination Bonding Technology Process Upgrade Path From Gluing To Self Adhesion
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Technical advantages: triple leap in efficiency, performance and reliability

Energy efficiency revolution

The self-adhesive structure eliminates the gap between the laminations, reduces eddy current loss by 30%-40%, and reduces iron loss to less than 0.20W/kg.

Tight lamination improves thermal conductivity, improves heat dissipation efficiency by 30%, and helps the motor to operate continuously at high load.

NVH performance breakthrough

The bonding strength reaches 5N/mm² (10 times that of traditional welding), the vibration amplitude is reduced by 60%, and the noise is controlled below 35dB.

Process simplification and cost optimization

​​Eliminate welding/riveting processes, shorten production cycle by 40%, and reduce labor costs by 50%.

​​Integrated molding reduces material waste and increases material utilization to more than 98%.

Glue Free Self Adhesive Electrical Steel Core Loss Optimization Technology For High Efficiency Motors
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Global application scenarios: practical cases from laboratory to mass production

New energy vehicle drive motor

Tesla Model S Plaid: uses 0.20mm self-adhesive silicon steel laminations, with a rotation speed exceeding 20,000rpm and a power density of 5kW/kg.

BYD e-Platform 3.0: Optimizes magnetic flux distribution through the skew slot stacking process to achieve 97.5% working efficiency.

Industrial servo motor

ABB IRB 6700: uses PPS injection-molded self-adhesive core, which is 40% smaller in size and has a protection level of IP67.

Aerospace field

​​GE Aviation LEAP engine: Amorphous alloy self-adhesive core achieves high temperature operation of 200℃ and reduces weight by 30%.

A Complete Analysis of Motor Lamination Bonding Technology Welding Riveting Self Adhesive Process Comparison and Applicable Scenarios
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Conclusion

Self-adhesive silicon steel technology - the "hidden champion" of the motor industry

From precision proofing in the laboratory to large-scale application in global production lines, self-adhesive silicon steel lamination technology is reshaping the motor manufacturing landscape with its core advantages of high efficiency, intelligence and environmental protection. With the continuous breakthroughs in materials science and automation technology, this technology will become the "gold standard" in the field of high-end motors, injecting strong momentum into the global Industry 4.0.

Quality Control for Lamination Bonding Stacks

As an stator and rotor lamination bonding stack manufacturer in China, we strictly inspect the raw materials used to make the laminations.

Technicians use measuring tools such as calipers, micrometers, and meters to verify the dimensions of the laminated stack.

Visual inspections are performed to detect any surface defects, scratches, dents, or other imperfections that may affect the performance or appearance of the laminated stack.

Because disc motor lamination stacks are usually made of magnetic materials such as steel, it is critical to test magnetic properties such as permeability, coercivity, and saturation magnetization.

Quality Control For Adhesive Rotor and Stator Laminations

Other Motor Laminations Assembly Process

Stator Winding Process

The stator winding is a fundamental component of the electric motor and plays a key role in the conversion of electrical energy into mechanical energy. Essentially, it consists of coils that, when energized, create a rotating magnetic field that drives the motor. The precision and quality of the stator winding directly affects the efficiency, torque, and overall performance of the motor.

We offer a comprehensive range of stator winding services to meet a wide range of motor types and applications. Whether you are looking for a solution for a small project or a large industrial motor, our expertise guarantees optimal performance and lifespan.

Motor Laminations Assembly Stator Winding Process

Epoxy powder coating for motor cores

Epoxy powder coating technology involves applying a dry powder which then cures under heat to form a solid protective layer. It ensures that the motor core has greater resistance to corrosion, wear and environmental factors. In addition to protection, epoxy powder coating also improves the thermal efficiency of the motor, ensuring optimal heat dissipation during operation.

We have mastered this technology to provide top-notch epoxy powder coating services for motor cores. Our state-of-the-art equipment, combined with the expertise of our team, ensures a perfect application, improving the life and performance of the motor.

Motor Laminations Assembly Epoxy Powder Coating For Motor Cores

Injection Molding of Motor Lamination Stacks

Injection molding insulation for motor stators is a specialized process used to create an insulation layer to protect the stator's windings.

This technology involves injecting a thermosetting resin or thermoplastic material into a mold cavity, which is then cured or cooled to form a solid insulation layer.

The injection molding process allows for precise and uniform control of the thickness of the insulation layer, guaranteeing optimal electrical insulation performance. The insulation layer prevents electrical short circuits, reduces energy losses, and improves the overall performance and reliability of the motor stator.

Motor Laminations Assembly Injection Molding of Motor Lamination Stacks

Electrophoretic coating/deposition technology for motor lamination stacks

In motor applications in harsh environments, the laminations of the stator core are susceptible to rust. To combat this problem, electrophoretic deposition coating is essential. This process applies a protective layer with a thickness of 0.01mm to 0.025mm to the laminate.

Leverage our expertise in stator corrosion protection to add the best rust protection to your design.

Electrophoretic Coating Deposition Technology For Motor Lamination Stacks

FAQS

What thicknesses are there for motor lamination steel? 0.1MM?

The thickness of motor core lamination steel grades includes 0.05/0.10/0.15/0.20/0.25/0.35/0.5MM and so on. From large steel mills in Japan and China. There are ordinary silicon steel and 0.065 high silicon silicon steel. There are low iron loss and high magnetic permeability silicon steel. The stock grades are rich and everything is available..

What manufacturing processes are currently used for motor lamination cores?

In addition to stamping and laser cutting, wire etching, roll forming, powder metallurgy and other processes can also be used. The secondary processes of motor laminations include glue lamination, electrophoresis, insulation coating, winding, annealing, etc.

How to order motor laminations?

You can send us your information, such as design drawings, material grades, etc., by email. We can make orders for our motor cores no matter how big or small, even if it is 1 piece.

How long does it usually take you to deliver the core laminations?

Our motor laminate lead times vary based on a number of factors, including order size and complexity. Typically, our laminate prototype lead times are 7-20 days. Volume production times for rotor and stator core stacks are 6 to 8 weeks or longer.

Can you design a motor laminate stack for us?

Yes, we offer OEM and ODM services. We have extensive experience in understanding motor core development.

What is the advantages of bonding vs welding on rotor and stator?

The concept of rotor stator bonding means using a roll coat process that applies an insulating adhesive bonding agent to the motor lamination sheets after punching or laser cutting. The laminations are then put into a stacking fixture under pressure and heated a second time to complete the cure cycle. Bonding eliminates the need for a rivet joints or welding of the magnetic cores, which in turn reduces interlaminar loss. The bonded cores show optimal thermal conductivity, no hum noise, and do not breathe at temperature changes.

Can glue bonding withstand high temperatures?

Absolutely. The glue bonding technology we use is designed to withstand high temperatures. The adhesives we use are heat resistant and maintain bond integrity even in extreme temperature conditions, which makes them ideal for high-performance motor applications.

What is glue dot bonding technology and how does it work?

Glue dot bonding involves applying small dots of glue to the laminates, which are then bonded together under pressure and heat. This method provides a precise and uniform bond, ensuring optimal motor performance.

What is the difference between self-bonding and traditional bonding?

Self-bonding refers to the integration of the bonding material into the laminate itself, allowing the bonding to occur naturally during the manufacturing process without the need for additional adhesives. This allows for a seamless and long-lasting bond.

Can bonded laminates be used for segmented stators in electric motors?

Yes, bonded laminations can be used for segmented stators, with precise bonding between the segments to create a unified stator assembly. We have mature experience in this area. Welcome to contact our customer servic.

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Looking for a reliable stator and rotor lamination bonding stack Manufacturer from China? Look no further! Contact us today for cutting-edge solutions and quality stator laminations that meet your specifications.

Contact our technical team now to obtain the self-adhesive silicon steel lamination proofing solution and start your journey of high-efficiency motor innovation!

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