The future trend of high-performance electric vehicle motors: an in-depth analysis of axial flux dual rotor single stator technology​

As the electric vehicle industry is booming, electric motor technology, one of the core components, is iterating at an alarming rate, which directly affects the vehicle's cruising range, power response and overall energy efficiency. Among them, the axial flux double-rotor single-stator motor, as a revolutionary technological innovation, is gradually becoming the focus of the industry. This article will comprehensively analyze the principles, technical advantages, challenges and profound impact on the electric vehicle industry of this cutting-edge technology, and reveal the future picture of electric vehicle motor technology.

The dual-rotor structure creates more space inside the motor, making it easier to design an efficient heat dissipation system, ensuring temperature control of the motor under high-intensity working conditions and extending its service life.

Exploration of technical concepts and principles

Traditional electric vehicle motors mostly adopt a radial flux design, with the direction of the magnetic field perpendicular to the axis of rotation. In contrast, axial flux motors shorten the magnetic path by adjusting the direction of the magnetic field to be parallel to the axis of the motor. This change greatly increases the power density of the motor. On this basis, the axial flux dual-rotor single-stator motor adopts an innovative dual-rotor layout and a single shared stator design. This design not only optimizes the structure of the motor, but also brings unprecedented performance improvements.

Research Trends Material and Process Innovation For Dual-Rotor Axial Flux Motors

Technical advantages and application value

  1. Excellent energy efficiency and power density

    The axial flux design shortens the magnetic field path and reduces energy loss. Together with the extra torque output brought by the dual-rotor structure, the motor can provide higher power in a smaller volume. output, greatly improving the endurance and acceleration performance of electric vehicles.

  2. Contribution of Dual-Rotor Single-Stator Axial Flux Motor In Reducing the Weight of Electric Vehicles
  3. Optimized thermal management and heat dissipation

  4. Performance Advantages of Single-Stator Dual-Rotor Axial Flux Motors In High-Speed Drive Applications
  5. Low noise and vibration

    Through careful design of the motor structure, the noise and vibration generated by the axial flux dual-rotor motor during operation are much lower than that of traditional motors, providing passengers with a quieter and more comfortable driving experience./p>

  6. Comparative Analysis of Energy Efficiency Improvement of Single-Stator and Double-Rotor Axial Flux Motors
  7. Simplified structure and easy maintenance

    Although the design is novel, it simplifies the mechanical structure, reduces potential failure points, facilitates maintenance and upgrades, and brings convenience to the long-term use and maintenance of electric vehicles.

  8. Comparative Analysis Performance Differences Between Dual-Rotor and Single-Rotor Axial Flux Motors

Challenges faced and coping strategies

Although the axial flux dual-rotor single-stator motor exhibits many advantages, its commercialization path still faces multiple challenges:

  1. Cost control

    The application of new materials and the demand for precision manufacturing technology have increased production costs, and costs need to be reduced through technological innovation and large-scale production.

  2. Optimizing the thermal Management Strategy of Dual-Rotor Single-Stator Axial Flux Motor
  3. Design and manufacturing difficulty

    High-precision magnet arrangement, complex winding design and strict thermal management requirements place higher demands on the processing technology, which requires continuous optimization of the design process and the adoption of advanced manufacturing technology.

  4. An Advanced Solution To Solve the Vibration and Noise Problems of Dual-Rotor Axial Flux Motors
  5. System integration and control

    The dual-rotor design poses new challenges to the motor control algorithm, requiring the development of an adaptable and responsive control system.

Future Outlook and Industry Impact

Facing the challenges, the future development of axial flux dual-rotor single-stator motors is promising. With the advancement of material science, the maturity of smart manufacturing technology, and the optimization of control strategies, its cost-effectiveness will gradually become apparent, and market acceptance will also increase.

  1. Technology maturity and cost reduction

    As technology matures and production scale expands, manufacturing costs will gradually decrease, making this technology more popular.

  2. Basic Principles and Structure Analysis of Dual-Rotor Single-Stator Axial Flux Motor
  3. Cross-field applications

    In addition to electric vehicles, the high efficiency characteristics of axial flux motors also show great potential in aerospace, ship propulsion, industrial equipment and other fields.

  4. Reliability and Durability Testing of Dual-Rotor Single-Stator Motors In Extreme Environments
  5. Promote changes in the industrial chain

    The application of new technologies will promote collaborative innovation in the upstream and downstream industrial chains, including material suppliers, equipment manufacturers, software developers, etc., and jointly promote technological progress in the entire electric vehicle industry.

Conclusion

In short, as a major innovation in the power system of electric vehicles, the axial flux dual-rotor single-stator motor not only heralds the future trend of motor technology, but is also an important promoter of electric vehicles and even the entire energy transformation era. With the continuous breakthroughs in technology and the widespread promotion of applications, we have reason to believe that a more efficient, cleaner, and smart mobility era is accelerating.

Market Perspective Commercialization Challenges and Opportunities of Dual-Rotor Single-Stator Axial Flux Motor

About Youyou Technology

Youyou Technology Co., Ltd. specializes in the manufacture of backlack precision cores made of various soft magnetic materials, including backlack silicon steel, ultra-thin silicon steel, and backlack specialty soft magnetic alloys. We utilize advanced manufacturing processes for precision magnetic components, providing advanced solutions for soft magnetic cores used in key power components such as high-performance motors, high-speed motors, medium-frequency transformers, and reactors.

The company Self-bonding precision core products currently include a range of silicon steel cores with strip thicknesses of 0.05mm(ST-050), 0.1mm(10JNEX900/ST-100), 0.15mm, 0.2mm(20JNEH1200/20HX1200/ B20AV1200/20CS1200HF), and 0.35mm(35JNE210/35JNE230/ B35A250-Z/35CS230HF), as well as specialty soft magnetic alloy cores including Soft Magnetic Alloy 1J22/1J50/1J79.

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

Q: How does the dual-rotor single-stator structure work? How does it improve motor performance?

The dual-rotor single-stator motor interacts with two oppositely arranged rotors through the axial magnetic field generated by a single stator. This design increases torque output, improves efficiency, and makes it possible to achieve stronger power output in a compact space.

Q: What are the application prospects of axial flux motors in electric vehicles?

Due to their high power density, lightweight and high efficiency, axial flux motors are well suited for use in electric vehicles, helping to increase range, accelerate acceleration and potentially reduce the overall weight of the vehicle.

Q: What’s special about the heat dissipation design of this motor?

The dual-rotor design provides more space for the heat dissipation system, which facilitates the design of a more efficient cooling mechanism. Through air channel design or liquid cooling system, the heat generated during motor operation can be taken away more effectively to ensure stable operation of the motor under high load.

Q: What are the advantages of this kind of motor in terms of noise and vibration control?

Through optimized mechanical balance design and electromagnetic compatibility design, the axial flux motor can significantly reduce noise and vibration during operation and improve ride comfort.

Q: What is the future development trend of axial flux motors?

It is expected that with the advancement of material science, innovation in manufacturing technology and the continuous improvement of performance requirements for electric vehicles, axial flux motors will continue to develop and become one of the key technologies to improve the energy efficiency of electric vehicles and promote industry progress.

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 backlack 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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