Amaliy mashg’ulot № 18
Mavzu 17: Mexanik tavsiflari chiziqli bo‘lgan elektr yuritmalarning o‘tkinchi jarayonini hisoblash.
Ishdan maqsad:
O’zgarmas tok dvigatelli elektr yuritmalarning o’tkinchi jarayonlarini hisoblashni o’rganish, dvigatelni ishga tushirishda o’tkinchi jarayon vaqtini aniqlash, dvigatelni ishga tushirishda uning momenti va tokini chegaralash uchun yakor zanjiriga qo’shimcha qarshilik kiritilgandagi o’tkinchi jarayon grafiklarini qurishni o’rganish.
Topshiriq:
O’zgarmas tok dvigatelli elektr yuritmaning ishga tushirish vaqtini aniqlang va o’tkinchi jarayon grafiklarini quring. Hisoblash uchun kattaliklarni 18.1-jadvaldan oling.
Vari
ant
|
kvt
|
A
|
, ayl/min
|
, kg·m2
|
1
|
3
|
16,5
|
975
|
10
|
2
|
4,5
|
25
|
1450
|
12
|
3
|
5
|
26,5
|
2850
|
13
|
4
|
5,6
|
30,9
|
950
|
14
|
5
|
6
|
33
|
920
|
15
|
6
|
7,5
|
40,3
|
2780
|
16
|
7
|
8
|
44,6
|
1470
|
18
|
8
|
11,2
|
56
|
2750
|
17
|
9
|
17
|
85
|
2780
|
19
|
10
|
16
|
82,6
|
2560
|
21
|
11
|
18,5
|
95,6
|
2550
|
22
|
12
|
26
|
133,5
|
2340
|
19
|
13
|
37
|
189
|
575
|
2,0
|
14
|
17
|
84,6
|
2950
|
15
|
15
|
4
|
22
|
2280
|
23
|
16
|
25
|
128
|
2120
|
16
|
17
|
75
|
385,2
|
975
|
25
|
18
|
55
|
287
|
1450
|
23
|
19
|
28
|
155
|
600
|
26
|
20
|
18,5
|
94
|
680
|
19
|
21
|
16
|
86,5
|
645
|
29
|
22
|
18
|
98
|
960
|
22
|
23
|
37
|
185
|
925
|
33
|
24
|
16
|
85,6
|
690
|
28
|
25
|
17
|
96,6
|
615
|
15
|
26
|
6
|
32,8
|
1475
|
18
|
27
|
4
|
19,4
|
1460
|
32
|
28
|
12
|
65
|
770
|
11
|
29
|
11
|
58
|
960
|
16
|
30
|
24
|
125
|
1975
|
12
|
Izoh: 1. Dvigatelning nominal kuchlanisnini Uн=220В deb oling.
Ishni bajarish tartibi:
Nominal magnit oqimidagi EYK koeffitsienti
bu erda. dvigatelni nominal burchak tezligi
Ishga tushirish momentini dvigatelni nominal momentining
2 barobariga teng deb olamiz
Yakor zanjirining to’la qarshiligi
Mexanik xarakteristikani bikirlik moduli
EYni ishga tushirish vaqtining elektr mexanik doimiysi
Ishga tushirihdagi tezlikni oxirgi qiymati
EYni ishga tushirish vaqti
Ishga tushirishda o’tkinchi jarayon egri chiziqlari da hisoblaymiz
Hisoblashlar natijalarini 18.2-jadvalga yozamiz
18.2-jadval:
Jadval bo’yicha o’tkinchi jarayon grafiklarini chizamiz
18.1 – rasm: Dvigatelni ishga tushirishdagi o’tkinchi jarayon grafiklari
Vazifa:
Barcha hisoblashlarni bajaring, EUni ishga tushirishdagi o’tkinchi jarayon egri chiziqlarini chizing, ish yuzasidan xulosa yozing.
Xulosa:
Xulosada dvigatelni ishga tushurishdagi o’tkinchi jarayon grafigini hisoblash va qurish tartibini tushuntiring. Dvigatel ishga tushishda dvigatel momenti va tezligini o’garish qonuniyatini izoxlang.
Amaliy mashg’ulot № 19
Mavzu 18: Mexanik tavsiflari egri chiziqli elektr yuritmalarning o‘tkinchi jarayonini hisoblash.
Ishdan maqsad:
Asinxron dvigatelli elektr yuritmalarning o’tkinchi jarayonlarini hisoblashni o’rganish, dvigatelni ishga tushirishda o’tkinchi jarayon vaqtini aniqlash, dvigatelni ishga tushirishda momenti va tezligini o’zgarish egri chiziqlarini qurishni bilish.
Topshiriq:
Asinxron dvigatelini ishga tushirishdagi o’tkinchi yarayonini hisoblang, moment bilan tezlikni o’zgarish grafiklarini chizing. Dvigatel parametrlarini 19.1-jadvaldan oling. 19.1-jadval:
Var
|
Tipi
|
Pн
kVt
|
nн
ayl/min
|
ηн
|
cosφн
|
Mmax /Mн
|
J, kg·m2
|
1
|
4A80A2УЗ
|
1,5
|
2875
|
0,81
|
0,85
|
2,6
|
0,0018
|
2
|
4A90L2УЗ
|
3,0
|
2870
|
0,845
|
0,88
|
2,5
|
0,0035
|
3
|
4A100S2УЗ
|
4,0
|
2900
|
0,865
|
0,89
|
2,5
|
0,0059
|
4
|
4A100L2УЗ
|
5,5
|
2890
|
0,875
|
0,91
|
2,5
|
0,0075
|
5
|
4A112M2УЗ
|
7,5
|
2925
|
0,875
|
0,88
|
2,8
|
0,01
|
6
|
4A132M4УЗ
|
11,0
|
1460
|
0,875
|
0,87
|
3,0
|
0,023
|
7
|
4A160S4УЗ
|
15,0
|
1465
|
0,885
|
0,88
|
2,3
|
0,1
|
8
|
4A160M4УЗ
|
18,5
|
1470
|
0,895
|
0,88
|
2,3
|
0,13
|
9
|
4A180S4УЗ
|
22,0
|
1470
|
0,90
|
0,90
|
2,3
|
0,19
|
10
|
4A180M4УЗ
|
30,0
|
1475
|
0,91
|
0,89
|
2,3
|
0,23
|
11
|
4A225M6УЗ
|
37,0
|
975
|
0,915
|
0,89
|
2,3
|
0,74
|
12
|
4A250S6УЗ
|
45,0
|
980
|
0,915
|
0,89
|
2,1
|
1,2
|
13
|
4A250M6УЗ
|
55,0
|
985
|
0,915
|
0,89
|
2,1
|
1,3
|
14
|
4A280S6УЗ
|
75,0
|
980
|
0,925
|
0,89
|
2,2
|
2,9
|
15
|
4A280M6УЗ
|
90,0
|
985
|
0,925
|
0,89
|
2,2
|
3,4
|
16
|
4A315M8УЗ
|
110,0
|
735
|
0,93
|
0,85
|
2,3
|
5,8
|
16
|
4A355S8УЗ
|
132,0
|
740
|
0,935
|
0,85
|
2,2
|
9,0
|
17
|
4A355M8УЗ
|
160
|
740
|
0,935
|
0,85
|
2,2
|
10,0
|
18
|
4A250S10УЗ
|
30,0
|
590
|
0,88
|
0,81
|
1,9
|
1,4
|
19
|
4A280S10УЗ
|
37,0
|
590
|
0,91
|
0,78
|
1,8
|
3,6
|
20
|
4A280M10УЗ
|
45,0
|
590
|
0,915
|
0,78
|
1,8
|
3,8
|
21
|
4A315S10УЗ
|
55,0
|
585
|
0,92
|
0,79
|
1,8
|
5,2
|
22
|
4A315S12УЗ
|
45,0
|
485
|
0,905
|
0,75
|
1,8
|
5,3
|
23
|
4A315M12УЗ
|
55,0
|
490
|
0,91
|
0,75
|
1,8
|
6,2
|
24
|
4A355S12УЗ
|
75,0
|
492
|
0,915
|
0,76
|
1,8
|
9,3
|
25
|
4A355M12УЗ
|
90,0
|
493
|
0,92
|
0,76
|
1,8
|
10,0
|
26
|
4AH160S2УЗ
|
22,0
|
2915
|
0,88
|
0,88
|
2,2
|
0,043
|
26
|
4AH180S2УЗ
|
37,0
|
2950
|
0,91
|
0,91
|
2,2
|
0,08
|
27
|
4AH160S4УЗ
|
18,5
|
1450
|
0,885
|
0,87
|
2,1
|
0,093
|
28
|
4AH225M6УЗ
|
45,0
|
980
|
0,91
|
0,87
|
2,0
|
0,70
|
29
|
4AH250M8УЗ
|
55,0
|
735
|
0,92
|
0,81
|
1,9
|
1,4
|
30
|
4AH315S10УЗ
|
75,0
|
585
|
0,91
|
0,82
|
1,8
|
6,4
|
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