6SL3352-6TH31-8AA1

6SL3352-6TH31-8AA1

功率计算一般负载分为两种,一种式电阻性负载,一种是电感性负载。

　　对于电阻性负载的计算公式:P=UI 对于日光灯负载的计算公式:P=UIcosф,其中日光灯负载的功率因数cosф=0.5。

　　不同电感性负载功率因数不同,统一计算家庭用电器时可以将功率因数cosф取0.8。

　　由于交流电路的电压和电流都随时间而变化，在任意瞬间，电压瞬时值u与电流瞬时值i的乘积为瞬时功率，用“p”表示：即：

　　由上述公式可知：电阻元件上瞬时功率由两部分组成，第一部分是常熟

6SL3352-6TH31-8AA1

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