Superseded82% confidenceTradeoffTime unknown
容量越大启动扭矩越强，但过大会缩短电机寿命并增加发热；风扇、抽油烟机等小功率设备用1.5-8μF运行电容即可，不必盲目选大容量
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82%
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Long-term
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This knowledge claim has been superseded by newer content
更换启动/运行电容时，容量（μF）必须与原电容严格一致，误差应控制在±5%以内，容量偏大会导致电机绕组过热，偏小则启动无力甚至无法启动Sources
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