本文是一篇图片消息型科普，用 4 张信息图讲解三相交流电机的 “极数” 与转速、转矩之间的关系。极（磁极）是电机产生磁场的基本单元，定子上的 N 极与 S 极按一定规律交替排列。极数按 “对” 计数：2 极等于 1 对极，4 极等于 2 对极，6 极等于 3 对极。
电源频率固定时，极数越多，同步转速越低。同步转速估算公式为 n ≈ 120f / P（f 为电源频率，P 为极数）。以 50 Hz 为例：2 极约 3000 rpm，4 极约 1500 rpm，6 极约 1000 rpm。
极数并非越多越好：极数少偏向高速、结构简单；极数多偏向低速、大转矩，但尺寸与复杂度上升。选极数，本质上是在转速、转矩、尺寸与成本之间做权衡。不同极数电机的结构差异，对装配精度提出不同要求。久巨电机自动装配线可适配多极数电机生产，通过工位工艺与检测参数柔性调整，保障不同极数产品的装配一致性，支撑多规格电机稳定量产。
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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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