- •Methodical instructions
- •Contents
- •The purpose and the task of practical work and course design.
- •Volume and content of course design
- •Organization and supervision of course design
- •Guideline for typography of en
- •1 Mechanics of electric drive, calculation of electromechanical and mechanical characteristics
- •1.1 Initial data
- •1.2 The task
- •1.3 Methodical instructions
- •1.3 Methodical instructions
- •2 Calculation of the loading diagram and choosing the motor capacity by its heating
- •2.1 Initial data
- •2.2 The task
- •2.3 Methodical instructions
- •3 Calculation and construction of static characteristics of thyristor drive
- •3.1 Initial data
- •3.2 The task
- •3.3 Methodical instructions
- •4. Calculation of transients in elastic double-weight electromechanical system of electric drive
- •4.1 The task
- •4.2 Methodical instructions
- •List of references
1 Mechanics of electric drive, calculation of electromechanical and mechanical characteristics
1.1 Initial data
1.1.1 The mechanism for which the open loop electric drive system is calculated , is accepted as the obligatory lift with a counterweight (Figure 1.1 a, b),which operates in four basic modes: rising and descending in accordance with loaded and empty cart.
The weight of empty cart |
m0, kg |
1000 |
The weight of counterweight |
mп, kg |
2000 |
The weight of load |
mH, kg |
Table 1.1 |
Diameter of the reel |
Dб, m |
0,8 |
Diameter of cart wheel |
Dк, m |
0,2 |
Diameter of journal |
dц, m |
0,04 |
Friction coefficient of wheel rolling on lath |
f, u. |
0,005 |
Friction coefficient in journeys |
µ, u. |
0,1 |
Friction coefficient of flanges upon lathes |
k, u. |
1,3 |
Degree of reel efficiency |
ηб, u. |
0,9 |
Degree of reduction gear efficiency |
ηр, u. |
0,92 |
Moment of inertia of the reel |
Jб, kgm2 |
70 |
Moment of inertia of drive rotor |
Jд, kgm2 |
Tables1.2,1.3 |
Moment of inertia of brake pulley |
Jт, kgm2 |
0,2Jд |
Moment of inertia of reduction gear |
Jр, kgm2 |
0,1Jд |
Slope angle of track |
α, deg. |
Table 1.1 |
Gear-ratio of reduction gear |
і |
Table 1.1 |
Nominal velocity of cart |
Vн, m/s |
Table 1.1 |
Figure 1.1 – Kinematic scheme of obligatory lift.
Table 1.1 – Initial data by variants.
Number of variant |
Мn, kg |
Slope angle α, deg |
ір |
Nominal velocity Vn, m/sec |
1 |
4800 |
30 |
50 |
0,6 |
2 |
2800 |
45 |
70 |
0,55 |
3 |
3700 |
45 |
60 |
0,8 |
4 |
3300 |
30 |
60 |
0,65 |
5 |
4100 |
45 |
35 |
0,8 |
6 |
3500 |
45 |
55 |
0,7 |
7 |
4000 |
30 |
35 |
1,3 |
8 |
3900 |
45 |
45 |
0,9 |
9 |
4800 |
45 |
45 |
0,6 |
10 |
4300 |
30 |
60 |
0,5 |
11 |
3800 |
60 |
40 |
1,1 |
12 |
3600 |
45 |
40 |
0,75 |
13 |
6000 |
45 |
50 |
0,6 |
14 |
5400 |
45 |
50 |
0,6 |
15 |
4400 |
60 |
40 |
1,0 |
16 |
4600 |
60 |
45 |
0,7 |
17 |
3000 |
45 |
40 |
0,8 |
18 |
2500 |
45 |
55 |
0,7 |
19 |
3400 |
45 |
50 |
1,0 |
20 |
4700 |
30 |
55 |
0,7 |
21 |
5500 |
30 |
40 |
0,7 |
22 |
3100 |
60 |
50 |
0,6 |
23 |
4500 |
45 |
65 |
0,7 |
24 |
5100 |
30 |
35 |
1,0 |
25 |
1520 |
45 |
35 |
0,75 |
Extension of the table 1.1.
Number of variant |
Мn, kg |
Slope angle α, deg |
ір |
Nominal velocity Vn, m/sec |
|||||||||||
26 |
4700 |
30 |
50 |
0,55 |
|||||||||||
27 |
2700 |
45 |
70 |
0,5 |
|||||||||||
28 |
3600 |
45 |
60 |
0,75 |
|||||||||||
29 |
3200 |
30 |
60 |
0,6 |
|||||||||||
30 |
4000 |
45 |
35 |
0,75 |
|||||||||||
31 |
3400 |
45 |
55 |
0,65 |
|||||||||||
32 |
3900 |
30 |
35 |
1,25 |
|||||||||||
33 |
3800 |
45 |
45 |
0,85 |
|||||||||||
34 |
4700 |
45 |
45 |
0,55 |
|||||||||||
35 |
4200 |
30 |
60 |
0,45 |
|||||||||||
36 |
3700 |
60 |
40 |
1,05 |
|||||||||||
37 |
3500 |
45 |
40 |
0,7 |
|||||||||||
38 |
5900 |
45 |
50 |
0,55 |
|||||||||||
39 |
5300 |
45 |
50 |
0,55 |
|||||||||||
40 |
4200 |
60 |
40 |
0,95 |
|||||||||||
41 |
4500 |
60 |
45 |
0,65 |
|||||||||||
42 |
2900 |
45 |
40 |
0,75 |
|||||||||||
43 |
2400 |
45 |
55 |
0,65 |
|||||||||||
44 |
3300 |
45 |
50 |
0,99 |
|||||||||||
45 |
4600 |
30 |
55 |
0,65 |
|||||||||||
46 |
5400 |
30 |
40 |
0,65 |
|||||||||||
47 |
3000 |
60 |
50 |
0,55 |
|||||||||||
48 |
4400 |
45 |
65 |
0,65 |
|||||||||||
49 |
5000 |
30 |
35 |
0,95 |
|||||||||||
50 |
5100 |
45 |
35 |
0,7 |
|||||||||||
Table 1.2 – Catalogue data of d.c. electric motors.
|
Resistance of the windings ,Оhm |
Rоз |
94 |
70 |
65 |
44,4 |
94 |
70 |
65 |
44,4 |
Comment. For all motors 2р=4, 2а=2, Un=220В, resistances are given for t=20°C.
|
||||
Rс |
0,0086 |
0,0037 |
0,0046 |
0,0037 |
0,0086 |
0,0037 |
0,0046 |
0,0037 |
|||||||
Rдп |
0,8 |
0,05 |
0,041 |
0,02 |
0,036 |
0,025 |
0,016 |
0,011 |
|||||||
Rя |
0,2 |
0,44 |
0,0625 |
0,034 |
0,085 |
0,047 |
0,031 |
0,0185 |
|||||||
Number of active conductors of armature N |
558 |
492 |
372 |
278 |
372 |
310 |
426 |
210 |
|||||||
Moment of inertia of armature Jд, kgm2 |
0,425 |
0,8 |
1 |
2 |
0,45 |
0,8 |
1 |
2 |
|||||||
Data at duration of switching-on , % |
100 |
n, rpm. |
810 |
740 |
710 |
635 |
1240 |
1150 |
1150 |
825 |
|||||
І, А |
22 |
30 |
32 |
50 |
30 |
40 |
47 |
57 |
|||||||
Р, kWt |
4 |
5,5 |
6,5 |
9,5 |
5,5 |
7 |
8,5 |
10 |
|||||||
60 |
n, rpm. |
790 |
720 |
705 |
625 |
1200 |
1130 |
1050 |
815 |
||||||
І, А |
39 |
50 |
62 |
85 |
52 |
68 |
80 |
96 |
|||||||
Р, kWt |
7,5 |
9,5 |
12 |
17 |
10 |
13 |
15 |
19 |
|||||||
Motor type |
Д32 |
Д41 |
Д806 |
Д808 |
Д32 |
Д41 |
Д806 |
Д808 |
|||||||
Execution |
Low-speed |
Rapid |
Table 1.3 – Catalogue data of d.c. electric motors. |
Nominal data at switching-on duration, % |
40 |
МДО, Nm |
373 |
549 |
765 |
1450 |
363 |
520 |
726 |
1325 |
n, об/хв |
770 |
700 |
700 |
620 |
1190 |
1120 |
1050 |
810 |
|||
І, А |
51 |
70 |
84 |
112 |
68 |
91 |
110 |
134 |
|||
Р, kWt |
9,5 |
13 |
16 |
22 |
13 |
17,5 |
21 |
26 |
|||
25 |
n, об/хв |
720 |
660 |
695 |
610 |
1130 |
1060 |
1050 |
800 |
||
І, А |
65 |
85 |
104 |
150 |
84 |
114 |
140 |
175 |
|||
Р, kWt |
12 |
16 |
20 |
30 |
16 |
22 |
27,5 |
35 |
|||
15 |
n, об/хв |
740 |
680 |
680 |
605 |
1180 |
1090 |
1050 |
790 |
||
І, А |
82 |
105 |
130 |
190 |
106 |
140 |
170 |
220 |
|||
Р, kWt |
14,5 |
19 |
24,5 |
37 |
20 |
27 |
33 |
43 |
|||
Nominal data at 60-min power conditions |
МДОП, Nm |
466 |
686 |
981 |
1860 |
451 |
648 |
930 |
1715 |
||
n, об/хв |
740 |
670 |
635 |
565 |
1140 |
1060 |
980 |
770 |
|||
ІН, А |
65 |
86 |
116 |
192 |
94 |
124 |
165 |
238 |
|||
РН, kWt |
12 |
16 |
22 |
37 |
18 |
24 |
32 |
47 |
|||
Motor type |
Д32 |
Д41 |
Д806 |
Д808 |
Д32 |
Д41 |
Д806 |
Д808 |
|||
Realization |
Low-speed |
Rapid |
Table 1.4– Catalogue data of induction motor.
|
Rotor resistance coefficient Ке2 |
4,2 |
2,66 |
2,37 |
1,96 |
3,5 |
2,96 |
2,03 |
1,65 |
Comment. Resistances R1 and R2 for t=75°C.
|
||
Resistance of windings ,Ом |
Rotor |
X2 |
0,241 |
0,254 |
0,233 |
0,173 |
0,29 |
0,245 |
0,231 |
0,448 |
||
R2 |
0,124 |
0,125 |
0,08 |
0,059 |
0,132 |
0,125 |
0,102 |
0,124 |
||||
Stator |
X1 |
0,645 |
0,431 |
0,271 |
0,197 |
0,666 |
0,507 |
0,313 |
0,232 |
|||
R1 |
0,51 |
0,337 |
0,219 |
0,133 |
0,51 |
0,352 |
0,202 |
0,164 |
||||
Moment of inertia of armature JД, kgm2 |
0,225 |
0,312 |
0,5 |
0,675 |
0,312 |
0,573 |
0,75 |
1,075 |
||||
Maximal moment of drive ММАХ, Nm |
314 |
471 |
638 |
932 |
422 |
569 |
883 |
1000 |
||||
Nominal voltage of rotor (linear) U2Н, В |
172 |
219 |
235 |
255 |
165 |
206 |
248 |
281 |
||||
Nominal current of rotor ТВ=40% І2Н,А |
42 |
46 |
60 |
73 |
43 |
48,8 |
57 |
64 |
||||
Motor type |
МТН 311-6 |
МТН 312-6 |
МТН 411-6 |
МТН 412-6 |
МТН 312-8 |
МТН 411-8 |
МТН 412-8 |
МТН 511-8 |
Table 1.5– Catalogue data of induction motor.
|
Data at the duration of switching-on, % |
100 |
n, об/хв |
965 |
965 |
975 |
980 |
725 |
720 |
730 |
725 |
Comment. Струс of stator is given at liner voltage 380V. The last number of motor designation indicates the number of pole pairs of machine 2р. |
І, А |
26,5 |
31,5 |
46 |
60,5 |
25 |
35,6 |
55 |
57 |
||||
Р, кВт |
7 |
9 |
14 |
18 |
6 |
10 |
13 |
18 |
||||
60 |
n, об/хв |
955 |
960 |
965 |
970 |
715 |
710 |
725 |
715 |
|||
І, А |
28,5 |
34,5 |
50 |
69,5 |
27,5 |
39,8 |
61 |
63 |
||||
Р, кВт |
9 |
12 |
18 |
25 |
8,2 |
13 |
18 |
23 |
||||
25 |
n, об/хв |
925 |
945 |
950 |
955 |
690 |
695 |
710 |
695 |
|||
І, А |
35 |
43 |
65 |
87 |
34,7 |
48 |
72 |
82 |
||||
Р, кВт |
13 |
17,5 |
27 |
36 |
13 |
18 |
26 |
34 |
||||
Rating data in mode ТВН=40% |
ω, рад/с |
98,5 |
99,5 |
100 |
101 |
73,4 |
74 |
75 |
74 |
|||
n, об/хв |
940 |
950 |
960 |
965 |
700 |
705 |
715 |
705 |
||||
ІН, А |
31,5 |
38,5 |
55,5 |
76 |
31 |
43 |
66 |
71 |
||||
РН, кВт |
11 |
15 |
22 |
30 |
11 |
15 |
22 |
28 |
||||
Motor type |
МТН 311-6 |
МТН 312-6 |
МТН 411-6 |
МТН 412-6 |
МТН 312-8 |
МТН 411-8 |
МТН 412-8 |
МТН 511-8 |