Advantages of glued stators and rotors in new energy motors

Since new energy vehicle motors are battery-driven, increasing their range is a key factor affecting user usage and improving product competitiveness. According to motor design principles, the eddy current loss of the motor is proportional to the square of its operating frequency.When the motor runs at a high speed, how to reduce eddy current loss is the key factor to improve the motor performance efficiency. Generally, the eddy current loss can be reduced by reducing the thickness of the silicon steel sheet. However, the eddy current generated by interlayer conduction due to welding and riveting during the stator and rotor stacking process is an unavoidable problem.

The glued stator and rotor lamination process theoretically reduces the eddy current loss caused by interlayer conduction to zero. Therefore, in high-end high-efficiency and high-speed motors, the glued stator and rotor core lamination technology has a natural advantage. Best has been focusing on gluing stators and rotors for many years, providing a variety of comprehensive solutions for manual gluing and self-adhesive gluing from stamping, lamination, testing and other aspects to escort customers' high-performance iron core stator and rotor products. Best's glued core has the following characteristics:

1. Through relevant tests, the stacking coefficient can reach 96%-98% (based on 0.2mm silicon steel sheet);

2. Imported glue with UL certification and 200-degree high temperature is used to ensure its electrical performance safety;

3. In theory, any additional loss can be avoided. By adopting other appropriate processes, it can ensure that the iron loss of the entire core product meets the relevant parameters in the material specification (with relevant test reports);

4. Since glue is used to fix the layers, the noise of the motor at high speed is significantly higher than that of the welding process;

5. Since the relevant glue forms a protective film on the surface of the product, it has a certain improvement effect on the anti-rust oil of the product;

6. According to the general new energy vehicle stator products with an outer diameter of 200mm and a height of 150mm, our company has the production capacity of 100 sets of products per day, and can increase the production capacity by 5 times within 1 month according to order requirements;

Best has been focusing on the stator and rotor projects of Xingneng Energy Automobile for many years and has accumulated a large number of industry customers and application case experiences. The relevant advantages are as follows:

1. We have established cooperation with many European and American new energy vehicle brands, participated in the entire process from prototype production to SOP to mass production, and accumulated a lot of relevant experience in product production and manufacturing processes; currently 3 projects have entered the mass production stage;

2. Best focuses on the field of 0.2mm thin sheet lamination. Currently, 90% of new energy vehicle stator and rotor projects use 0.2mm silicon steel sheets. The company has the full-process production capabilities from sample production, mold design, stamping (350T high-speed punch press), gluing and lamination, and product testing; and has been unanimously recognized by many European customers;

3. Best provides 0.2mm silicon steel sheet manual gluing (stack factor 97%) and 0.2mm self-adhesive silicon steel sheet gluing iron core stacking solution (stack factor 94%-95%). Customers can decide which stacking solution to use according to project requirements;

4. The 0.2mm silicon steel sheet stator and rotor progressive die with an outer diameter of 200+mm is a difficult problem in the industry. Through years of technical accumulation, Best has realized the design and manufacture of 210mm outer diameter stator and rotor sleeve punching progressive die. At present, the product has entered the stable production stage; The product rotor has no deformation and burr, thus ensuring a stacking coefficient of more than 97%;

5. The company's bonding stator and rotor production capacity can fully meet customer needs. At present, Best has the production capacity of 100 sets of new energy bonding stator and rotor cores per day, and after the relevant personnel configuration is updated, it can be quickly increased by 3-5 times;