Jiuju Automation
轴向磁通电机技术突破背后，制造工艺如何破局
244轴向磁场电机也常被称为轴向磁通电机，是当前电驱领域关注度较高的技术方向，在汽车驱动、低空经济、工业机器人关节等场景均有应用探索。
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轴向磁场电机也常被称为轴向磁通电机，是当前电驱领域关注度较高的技术方向，在汽车驱动、低空经济、工业机器人关节等场景均有应用探索。
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A multi-pole architecture brings a high-frequency fundamental; at 10,000 rpm the fundamental frequency can reach several kHz. Traditional IGBTs suffer soaring switching losses and severe heating — it is the MHz-class switching capability of SiC MOSFETs that truly matches high-frequency multi-pole axial flux motors.
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A multi-pole architecture brings a high-frequency fundamental; at 10,000 rpm the fundamental frequency can reach several kHz. Traditional IGBTs suffer soaring switching losses and severe heating — it is the MHz-class switching capability of SiC MOSFETs that truly matches high-frequency multi-pole axial flux motors.
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There is no universal architecture in engineering. Axial flux is more suitable for space-sensitive, lightweight-first scenarios; the radial motor remains the first choice for cost-sensitive, high-volume scenarios. The essence of selection is the degree of match with the application scenario.
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The "short and wide" disc structure is a constraint in a conventional chassis, yet becomes the key to leapfrog integration on a dedicated electrified platform. The same form, two fates - it all depends on the packaging approach.
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The effective magnetic force acts at the outer-diameter edge, so at the same speed the magnets endure far higher centrifugal stress than in a slender radial motor. Under high-speed conditions, how the magnets are firmly fixed to the rotor disc is a key point of structural design.
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High-performance NdFeB is indeed expensive, but an axial-flux motor's "cost per unit torque" does not lose out. It uses less magnet and copper material, and can even save the system a gearbox or battery capacity, making the overall BOM more cost-effective instead.
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A motor technology with superior torque density and power density — why is the mainstream market still dominated by radial motors? A breakdown from three angles: talent pool, industrial inertia, and production-line sunk cost.
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When the air gap is compressed to the millimeter level, the motor interior soars from room temperature to over 100°C during operation; aluminum housing, steel shaft, copper wire, and magnets have different expansion coefficients, and axial deformation may widen the air gap.
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Magnetic flux must pass axially through the disc-shaped stator; traditional lamination stacking fails, and grain-oriented silicon steel ring-milled with slots destroys grain orientation. The stator and windings become the hardest nut to crack in axial flux mass production.
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