有功功率和无功功率计算公式

有功功率和无功功率计算公式

电功率是单位时间内电场力所做的功。

$P = \frac{W}{t}$文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$P$ — 功率（W），$W$ — 电功（J），$t$ — 时间（s）。文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$P = UI = I^2R = \frac{U^2}{R}$文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$P = UI\cos\varphi$ （单相）文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$P = \sqrt{3}UI\cos\varphi$ （三相）文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$S^2 = P^2 + Q^2$文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

$S$ — 视在功率（VA），$P$ — 有功功率（W），$Q$ — 无功功率（var）。文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html

⚡ 功率计算是电工基础核心内容。文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html 文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html文章源自公式库网-https://www.gongshiku.com/html/201808/yougonggongshuaihewugonggongshuaijisuangongshi.html