1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 14 : Miscellaneous Topics"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 14.1, Page No 777"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#initialisation of variables\n",
"V_s=230.0\n",
"V_m=math.sqrt(2)*V_s\n",
"a1=0\n",
"a2=45.0\n",
"\n",
"#Calculations\n",
"print(\"for two single phase series semiconvertors\")\n",
"V_0=V_m/math.pi*(2+math.cos(math.radians(a1))+math.cos(math.radians(a2))) \n",
"print(\"avg o/p voltage=%.2f V\" %V_0)\n",
"V_or=V_s*math.sqrt((1/math.pi)*(4*math.pi-3*a2*math.pi/180+(3/2)*math.sin(math.radians(2*a2)))) \n",
"print(\"rms value of o/p voltage=%.2f V\" %V_or)\n",
"DF=(3+math.cos(math.radians(a2)))/(math.sqrt(2)*math.sqrt(5+3*math.cos(math.radians(a2)))) \n",
"print(\"DF=%.2f\" %DF)\n",
"PF=math.sqrt(2/math.pi)*(3+math.cos(math.radians(a2)))/math.sqrt(4*math.pi-3*a2*math.pi/180) \n",
"print(\"PF=%.2f\" %PF)\n",
"HF=math.sqrt((math.pi*(math.pi-(3/4)*a2*math.pi/180)/(5+3*math.cos(math.radians(a2))))-1) \n",
"print(\"HF=%.2f\" %HF)\n",
"print(\"for two single phase series full convertors\")\n",
"a=45.0\n",
"V_0=2*V_m/math.pi*(1+math.cos(math.radians(a))) \n",
"print(\"avg o/p voltage=%.2f V\" %V_0)\n",
"V_or=2*V_s*math.sqrt((1/math.pi)*(math.pi-a2*math.pi/180+(1/2)*math.sin(math.radians(2*a2)))) \n",
"print(\"rms value of o/p voltage=%.2f V\" %V_or)\n",
"DF=math.cos(math.radians(a2/2)) \n",
"\n",
"\n",
"#Results \n",
"print(\"DF=%.2f\" %DF)\n",
"PF=math.sqrt(2/(math.pi*(math.pi-a2*math.pi/180)))*(1+math.cos(math.radians(a2))) \n",
"print(\"PF=%.2f\" %PF)\n",
"HF=math.sqrt((math.pi*(math.pi-a2*math.pi/180)/(4+4*math.cos(math.radians(a2))))-1) \n",
"print(\"HF=%.2f\" %HF)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"for two single phase series semiconvertors\n",
"avg o/p voltage=383.82 V\n",
"rms value of o/p voltage=434.47 V\n",
"DF=0.98\n",
"PF=0.93\n",
"HF=0.62\n",
"for two single phase series full convertors\n",
"avg o/p voltage=353.50 V\n",
"rms value of o/p voltage=398.37 V\n",
"DF=0.92\n",
"PF=0.89\n",
"HF=0.29\n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
