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低电压耗电多还是高电压耗电多

更新时间: 2020-10-01 00:00:00     

耗电多少与电压有关,还与电流有关。

分两类用电器,一类是非电动类,例如照明、电热、普通家电,电压低的时候电流也减小,实际功率小于额定功率。用电量小即耗电少。另一类是电力拖动类,电压降低后电动机的转速降低,使得电流增大,用电量多即耗电多。

关键词: 电压 耗电 还是

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