Huaxin Securities: Axial-flux magnetic motor is expected to become the next generation motor for actuators. SMC integrated die-casting and stator structure optimization accelerate commercialization.

Huaxin Securities released a research report stating that axial magnetic flux motor design is flexible and can combine the number of rotors and stators according to application requirements, providing ideal power for electric aircraft, electric vehicles, and Siasun Robot&Automation joints. Its flat structure and high-performance characteristics are expected to make it the preferred solution for humanoid Siasun Robot&Automation drive motors. Currently, factors restricting mass production include: small air gap deviation, high heat dissipation pressure, high cost, and high mechanical stress. The firm believes that integrating SMC casting and optimizing stator structure are expected to accelerate the commercial application of axial magnetic flux motors. Key points from Huaxin Securities: Axial magnetic flux motor has obvious structural advantages and high power density characteristics. Axial magnetic flux motor is a disc motor with a magnetic flux path parallel to the shaft. Compared to traditional radial magnetic flux motors, at the same power, its weight and axial dimensions can be reduced by half, the efficient range is wider, with an efficiency area of over 90%, and torque density and power density are significantly increased. Its design flexibility allows for the combination of rotor and stator numbers according to application requirements, providing ideal power for electric aircraft, electric vehicles, and Siasun Robot&Automation joints. Its flat structure and high-performance characteristics are expected to make it the preferred solution for humanoid Siasun Robot&Automation drive motors. Issues such as precision disc structure and heat dissipation restrict mass production of axial magnetic flux motors. The disc structure of the axial magnetic flux motor brings manufacturing complexity: 1. Small air gap deviations can affect magnetic field distribution and axial magnetic attraction, easily leading to vibrations and noise, and reducing lifespan. 2. High heat dissipation pressure: the sandwich structure and high specific power lead to low heat capacity, causing the rotor magnetic steel to overheat and increasing the risk of demagnetization. 3. High cost: special materials and complex manufacturing result in high production costs. 4. High mechanical stress: the large radius rotor undergoes centrifugal force under high-speed rotation, posing a challenge to structural stability. SMC integrated casting and optimizing stator structure are expected to accelerate the commercial application of axial magnetic flux motors. The industry currently mainly adopts: 1. SMC integrated casting: with isotropic magnetism, it can support complex three-dimensional magnetic flux designs, compatible with 3D printing, and enables large-scale stable manufacturing. 2. PCB stator: coreless design reduces weight, lowers eddy current losses, and improves efficiency and reliability. 3. Structural optimization: flat coils increase slot filling rate, resulting in a stronger magnetic field and a 20-30% increase in power; optimizing coil shapes improves heat dissipation efficiency. 4. Enhanced heat dissipation: new applications such as liquid cooling channels, phase change materials, and carbon nanotubes significantly enhance heat management capabilities.