Unverified75% confidenceTradeoffTime unknown
转速高扭矩不一定强，遇到顽固污渍高转速刷头易打滑空转；低速高扭矩（约1000-1500rpm配大扭矩电机）反而更能咬住污垢，选购时应看是否标注扭矩而非只看转速
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75%
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Long-term
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Unverified空载转速标称通常在300-500rpm，但清洁力关键看扭矩，扭矩低于同类产品的高转速刷贴到污垢表面会明显掉速甚至卡停，认准堵转扭矩参数而非单看转速84% similarUnverified关注电机转速与切须频率而非单纯外观：往复式看每分钟切须次数（高端可达9万次/分以上），转速越高单次刮净度越好、拉扯感越小；低速廉价机型易夹须扯痛83% similarUnverified转速虚标常见：宣传3200RPM往往是空载值，带负载（压肌肉）后实际掉速明显。判断堵转扭矩比看RPM数字更靠谱，扭矩不足按下去就停转78% similarUnverified运动速度精度看'最低速能否连续无顿挫'，优质产品最慢可达0.5mm/s平滑运行用于长曝光延时；廉价步进电机在极低速下会出现肉眼可见的阶梯抖动78% similarUnverified无级调速比固定档位更实用于打发：起步慢速防溅、后期高速打发，固定档位机型最低档若仍偏快，加面粉时易飞溅76% similar
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