Focus on SMC cores
Core Material Selection for Axial Flux Motors

  Leveraging their core strengths of high power density and lightweight design, axial flux motors have emerged as critical power components in fields such as new energy vehicles and humanoid robots. As the essential medium for a motor's magnetic circuit, the iron core—and specifically the evolution of its underlying technology—directly determines the upper limits of motor performance. Moving forward, technological advancements will focus on breakthroughs in high-grade materials, modular structures, precision manufacturing processes, and cost optimization, thereby enabling a dual-pronged empowerment of both high-efficiency performance and industrial-scale production.
  Material innovation constitutes the core breakthrough point. In the future, traditional silicon steel laminations will be gradually supplanted by the widespread adoption of high-performance soft magnetic materials—such as nanocrystalline and amorphous alloys. These advanced materials can reduce iron losses by over 40%, thereby significantly boosting motor energy efficiency. Concurrently, the application of self-bonding silicon steel laminations and Soft Magnetic Composites (SMCs) will further streamline assembly processes and optimize hysteresis losses. Furthermore, advancements in composite coating technologies will enable the synergistic combination of different materials, effectively resolving the inherent trade-off between magnetic permeability and saturation flux density often encountered with single-material designs.
Structural design is evolving toward greater modularity and lightweight construction. Segmented and yoke-less iron core designs are poised to become the industry standard; by optimizing slot geometries to minimize magnetic resistance losses and integrating Halbach array magnets to enhance the sinusoidal purity of the air-gap flux density, these designs achieve superior performance. Additionally, modular, quick-release structures will significantly reduce axial thickness, elevating power density to unprecedented levels. Moreover, customized structural designs tailored to specific operational scenarios will effectively address the diverse and differentiated requirements of various sectors, ranging from new energy vehicles to low-altitude aerial vehicles.
  Process upgrades are centering on precision and intelligent automation. Technologies such as 3D-printed cooling channels and laser welding will be widely deployed to enhance heat dissipation efficiency and structural integrity, while automated winding and pre-assembly processes for windings will reduce production costs and ensure greater consistency in mass production. Simultaneously, the integration of digital manufacturing systems with AI-driven inspection technologies will enable comprehensive process control throughout the entire iron core production lifecycle, thereby maintaining defect rates at an exceptionally low level.
In the future, axial flux motor iron core technology will revolve around the core objectives of "high efficiency, compact design, and low cost." This strategic focus will drive the deep integration of materials, structures, and manufacturing processes to overcome industrialization bottlenecks, facilitate the motor industry's transition toward greener and more sophisticated technologies, and provide critical foundational support for the advancement of the new energy and high-end equipment sectors.

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