题目内容
在远距离输电中, 输送电压为220伏, 输送的电功率为44千瓦, 输电线的总电阻为0.2欧, 在使用原副线圈匝数比为1:10的升压变压器升压, 再用10:1的降压变压器降压方式送电时. 输电线上损失的电压为__________V, 损失的电功率为_______________W
4、80
由公式:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652143451.png)
原线圈的电流:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652315990.png)
,所以![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652362560.png)
输电线上损失的电压:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652393319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652408822.png)
损失的电功率:
=400×0.2=80W
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652143451.png)
原线圈的电流:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652315990.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652330578.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652362560.png)
输电线上损失的电压:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652393319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652408822.png)
损失的电功率:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125652440557.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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