Axial-flux motors are inherently a bit better at heat dissipation. A radial motor's heat must first pass through the slot insulation and stator core before reaching the outer water jacket, with substantial thermal resistance; an axial-flux motor's stator winding is exposed on a flat disc, so the cooling medium can spray directly onto the winding surface, or a water-cooling plate can be placed right against it — a short path with high efficiency.
Oil cooling and direct-contact water cooling both work on this type of motor, which is also part of its confidence in achieving high power density. Compared with a radial motor that routes a cooling water path around the housing, an axial-flux motor can immerse the winding directly in the cooling medium, taking heat exchange up a level. Only when heat can get out can the high heat generated by high torque be suppressed; otherwise, no matter how good the motor is, it must derate after a while.
But the flat structure brings another problem: sealing. A large-diameter flat sealing ring has to withstand hot-cold cycling and slight micro-deformation of the housing, and is more prone to leakage than the small-bore seal of a cylindrical motor. As temperature cycles, the seal and housing expand and contract together and gaps appear; once coolant leaks out, winding insulation is directly threatened.
So in high-end solutions the seal groove is often made as a double-seal structure, and the material must be an oil-resistant, fluorine-resistant specialty rubber, using two lines of defence to minimize leakage risk. Heat dissipation and sealing — one pushes forward, the other must back it up. On related lines, Jiuju is quite strict about the flatness of the sealing surface and the assembly torque: once coolant leaks in, even the best thermal design is useless. The more such motors move toward high power and oil cooling, the more weight the sealing process carries. In a word, heat dissipation gives it the confidence of high power density, while sealing determines how long that confidence can last.
又是一年月圆时至，秋风送桂香，阖家庆团圆。在浓浓的中秋氛围中，久巨始终坚守智造初心，企业每一份成长与收获，都离不开全体同事的勤恳付出与同心并肩。
时光缓缓流淌，岁月镌刻成长。为感谢全体伙伴一路并肩同行，传递公司人文关怀，久巨 7‑9 月员工集体生日会温情如约而至。
金秋送爽，月满中秋。为增进会员企业交流，凝聚行业发展合力，深圳市音响行业协会中秋会员联谊会于 9 月 18 日在会员单位深圳盛佳丽电子圆满举办。
The shipping area outside the workshop was a hive of activity. After multiple rounds of full-machine commissioning, simulated mass-production validation, and factory quality inspection, a Jiuju DC motor automatic assembly line completed all factory-out procedures, was loaded onto trucks on schedule, and is about to depart for the customer's production base, helping the customer's project advance production implementation on plan.
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轴向磁通电机体积小、功率密度高，但定转子合装受强磁吸力制约，气隙均匀度与磁钢定位决定批量一致性。量产拼的不是设计，是装配过程能否被固定住。
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Robotic joints require high torque, compact size, and light weight; axial flux motors offer unique advantages in scenarios with limited axial space. This article analyzes their suitability and the challenges involved.
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