What Is Motor Lamination Stacking Technology, And How Does It?

Electric machines drive our modern world, propelling everything from household appliances to industrial giants. But have you ever wondered how these motors achieve such remarkable efficiency and performance? Enter Motor Lamination stacking Technology – the ingenious technique at the core of electric motor design.

In this blog, we will delve into the technology of motor lamination stacks, exploring its principles, benefits, and how it revolutionizes the performance of electric machines.

Fundamentals of Motor Lamination Stacking

motor lamination stacks

At the heart of an electric motor lies the laminated core, which plays a crucial role in its operation. Motor lamination stack technology arranges thin silicon steel sheets, known as laminations, into a stacked core. This core acts as the backbone of the motor, enhancing its magnetic properties and reducing energy losses.

The primary purpose of lamination stacks is to minimize eddy current losses, which occur when a changing magnetic field induces currents in the motor’s core material. Using laminations with insulating coatings substantially reduces these losses, improving motor efficiency and performance.

The stator and rotor form the core of the motor: motor rotor and stator lamination material electrical steel. Electrical steel’s unique magnetic properties make it an ideal choice for motor cores. Depending on the motor’s design and requirements, manufacturers can choose between non-oriented and grain-oriented laminations, each offering specific benefits.

Motor Lamination Stacking Process

Preparing the lamination

The motor laminations are manufactured through a precise stamping process, where thin sheets of electrical steel are cut into the desired shape and size. After stamping, the laminations are coated or insulated to prevent eddy currents.

stacks sequence and orientation

The order in which the laminations stacks and their orientation significantly impact the motor’s performance. Designers carefully arrange the laminations to optimize magnetic flux paths and reduce energy losses.

Motor Core construction and assembly

lamination stacks process


Riveting involves joining the laminations using metal rivets, inserted through pre-drilled holes, and then secured by deforming the rivet ends. Riveting is a widely used method for assembling small and medium-sized motors. It provides excellent mechanical strength and stability to the core.


Cleating uses small metal tabs or cleats inserted between the laminations and bent to interlock them. This method allows for an efficient and cost-effective way to assemble the core without additional fasteners.


Welding is another bonding technique used in motor lamination together stacks. Laser welding is a precise and fast method that involves melting and fusing the edges of the laminations. TIG and MIG welding involves using electric arcs to join the laminations with the help of filler material. Welding ensures a robust and reliable bond, making it suitable for high-performance motors.


Self-bonding laminations have a layer of adhesive material. When stacked together for stamping, the adhesive activates, creating a solid bond between the laminations without additional fasteners or welding. Self-bonding adhesive bonding allows compliance with the narrowest tolerances and excellent shape stability because of the laminations.  Self-bonding simplifies the assembly process and reduces the risk of contamination from external bonding agents.

Industrial Applications of Motor Lamination Stacking Technology

Electric Motor lamination stacks technology is used in various applications, including industrial motors, Electric Vehicles Motor, Hybrid Electric Vehicles Motor, Wind/Fire Power Generator, etc. These laminations serve an essential purpose by powering heavy machinery with superior efficiency.

motor lamination stacks applications

Advantages of Motor Lamination Stacking Technology

Reduced eddy current losses

The primary benefit of lamination stacks is the significant reduction in eddy current losses. Engineers can minimize energy dissipation and improve motor efficiency by using insulated laminations.

Improved Thermal Conductivity

Efficient heat dissipation is crucial for the reliable operation of electric machines. Motor lamination stacks enhance thermal conductivity by providing continuous paths for heat flow through the core. This feature helps efficiently dissipate heat generated during motor operation, preventing overheating and promoting optimal performance.

Lower noise and vibration levels

Lamination stacks help minimize undesirable noise and vibrations, leading to quieter and smoother motor operation.

Customization and design flexibility

Manufacturers can customize the stack’s sequence, orientation, and bonding methods to meet specific performance requirements and applications.

Motor Core Lamination Bonding Process From Motorneo

Are you ready to take your electric machines to the next level of efficiency and performance? Motor lamination stacks Technology is the key to unlocking their hidden potential and revolutionizing your applications. Join us on this transformative journey as we unveil the backbone of efficient electric machines.

Our lamination stack process is at the forefront of progress and innovation in your industry. Motor lamination stacks offer design flexibility and customization, enabling you to create electric machines tailored to your unique requirements.

Our team of experts is here to guide you through the intricacies of motor lamination stacks. Whether you need assistance with material selection, bonding techniques, or motor design, We will do our best to help you achieve your goals.

Please take advantage of this opportunity to contact us and elevate your electric machines to new heights of efficiency and performance.


As we reach the end of our exploration into Motor lamination stacks technology, we can confidently say that it is the unsung hero behind the efficient and reliable operation of electric machines. Through precise stacks and bonding of stator and rotor laminations, engineers have unlocked the full potential of electric motors, driving progress and innovation in countless industries. This technology’s remarkable benefits include reduced eddy current losses, enhanced motor efficiency, and lower noise levels.

We hope this blog has shed light on the marvels of motor lamination stacks and how they serve as efficient electric machines’ backbone. As technology evolves, we expect further advancements and innovations in lamination materials, bonding techniques, and motor designs.

For any inquiries or to learn more about motor lamination stacks and their applications, please don’t hesitate to contact us. We are happy to assist you in harnessing the power of this transformative technology for your specific needs.


How are motor laminations manufactured in China?

Motor laminations typically use a stamping process. In this process, large sheets of electrical steel are fed into a stamping press, which uses a die to cut the sheets into precise shapes and sizes. The stamped laminations and remaining sheet metal are separate.

Are there any other techniques used in the manufacture of motor cores?

Aside from stamping, lamination stacking, and bonding, the motor cores manufactured also use other techniques. These may include lamination prototype design, laser cutting, CNC machining, and advanced additive manufacturing methods employed in some specialized motor designs.

Can China manufacturers provide customized solutions for Motor lamination stacks?

Chinese manufacturers can offer customized solutions for Motor lamination stacks. Their expertise in material selection, stack sequence, and bonding methods allows them to customize electric machine designs to meet specific performance requirements and application needs.

Which materials are commonly used in the manufacture of motor cores?

The most common material used to manufacture motor cores is electrical steel, also known as silicon steel or transformer steel. Its low core loss and high magnetic permeability make it ideal for minimizing energy losses and maximizing motor efficiency. A small portion uses alloys.

Try to contact us for high-quality motor cores in China.