23
2025
-
07
Revolutionizing Motor Power Density: Axial Magnetic Field Winding Technology Unleashed
The axial magnetic field winding technology significantly improves the power density of motors through structural innovation and material properties synergy. The core mechanism is as follows:
1、 Three dimensional magnetic circuit design shortens the magnetic flux path
Axial air gap layout: The magnetic flux direction is parallel to the motor axis, and the magnetic flux path goes from one pole through the air gap to the other pole. The path length is shortened by more than 30% compared to the radial magnetic field, reducing magnetic resistance and enhancing the strength of the air gap magnetic field.
Dual rotor single stator structure: Adopting a layout of dual rotors clamping the stator (such as AFIR structure), the magnetic flux passes through both sides of the air gap simultaneously, effectively improving the magnetic flux utilization rate and increasing the torque density by 25% -30%.
2、 Empowering High Frequency Characteristics of Amorphous Materials
Advantages of high frequency and low loss: The stator core wound with amorphous alloy strip (0.02-0.03mm) has an iron loss of only 1/5 of that of silicon steel under high frequency conditions, allowing the motor speed to be increased to over 15000rpm without overheating.
Weight reduction of yokeless structure: Drawing inspiration from YASA motor design, the traditional stator yoke is eliminated, and the amorphous strip is directly wound into a hollow cylinder, reducing the mass of ineffective iron core by 30%, and the power density exceeds 5kW/kg.
3、 Innovation of integrated winding process
Precision winding gap control technology: ± 0.1mm tension control winding, making the gap between the strips ≤ 10 μ m, suppressing magnetostrictive noise while improving the lamination coefficient to over 95%, reducing iron loss by 20%.
Axial splicing packaging: Pre roll the amorphous strip into fan-shaped units, and then assemble them axially into a complete iron core (such as the S13-MRL model), increasing the heat dissipation area by 50% and improving the continuous power output capability.
4、 Terminal application performance verification
In models such as Ferrari SF90 and McLaren Artura, the axial magnetic field amorphous motor achieves a torque density of 18Nm/kg, a 40% reduction in volume compared to radial motors of the same power, and a 12% increase in range.
This technology, through three iterations of magnetic circuit optimization, material innovation, and process upgrading, has propelled power density into the 8kW/L era and become the core electric drive solution for new energy vehicles and low altitude aircraft.
The Division's business objectives are all for our customers to "improve efficiency, create benefits, reduce costs", make friends with customers all over the world, and strive to make Guangzhou Hongyao Automation Equipment Co., Ltd. a first-class automation equipment manufacturer in the winding machine industry.
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