Определение потери мощности электродвигателя в режиме холостого хода осуществляется по формуле
Px 0.25 Pн=7.5 103 |
Вт |
0.935 |
|
0.885 |
|
0.835 |
|
0.785 |
|
0.735 |
|
0.685 |
|
0.635 |
ηi |
0.585 |
0.814 |
0.535 |
|
0.485 |
|
0.435 |
|
0.385 |
|
500 2 10³3.5 10³5 10³6.5 10³8 10³9.5 10³.1 10.25 10.4 10.55 10.7 10 |
|
Pi |
|
7.5 103 |
|
ηxx 0.814 |
|
ΔPxx 1- ηxx Px=1.713759 103 |
|
ηxx |
21 |
|
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Проверка электродвигателя на нагрев
tx 1
3600 ΔPн= 1.133702 107
z Wn+(3600- z (tp-tx)) ΔPxx=6.83711 106
2.07 10³
2.025 10³
1.98 10³
1.935 10³
1.89 10³
1.845 10³
1.8 10³ |
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ΔPi |
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|||
1.755 10³ |
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1.71 10³ |
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1.665 10³ |
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1.62 10³ |
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1.575 10³ |
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-35 |
-28 |
-21 |
-14 |
-7 |
0 |
7 |
14 |
21 |
28 |
35 |
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ααα |
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2.07 10³ |
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2.025 10³ |
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1.98 10³ |
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1.935 10³ |
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1.89 10³ |
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1.845 10³ |
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1.8 10³ |
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ΔPi |
1.755 10³ |
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1.71 10³ |
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1.665 10³ |
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1.62 10³ |
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1.575 10³ |
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0.605 |
0.63 |
0.655 |
0.68 |
0.705 |
0.73 |
0.755 |
0.78 |
0.805 |
0.83 |
0.855 |
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ti |
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|
22
1.7 10
1.55 10
1.4 10
1.25 10
1.1 10
9.5 10³
8 10³
6.5 10³
5 10³
3.5 10³
2 10³
500
-0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6
Pi
α
23