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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
{
"metadata": {
"name": "",
"signature": "sha256:9e27d5dc9ee72aa8af2a87478e959a0f346f3cc04c2f1acb86835886294034d4"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 4: Special Purpose Machines"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.1, Page 281"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#Given data :\n",
"P=8;#no. of poles\n",
"T=5;#no. of teeteh in each pole\n",
"Nr=50.;#no. of teeth in rotor\n",
"\n",
"#Calculations\n",
"Ns=P*T;#no. of teeth\n",
"Beta=(Nr-Ns)*360/(Nr*Ns);#in degree\n",
"\n",
"#Result\n",
"print \"Stepping Angle(in degree) : = \",Beta;"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Stepping Angle(in degree) : = 1.8\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.2, Page 282"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#Given data :\n",
"Beta=2.5;#in degree\n",
"f=3600;#in PPs\n",
"Resolution=360;#in degree\n",
"\n",
"#Calculations&Results\n",
"print \"Resolution : \",Resolution;\n",
"Beta1=Resolution/Beta;#steps/revolution\n",
"print \"Steps per revolution : \",Beta1;\n",
"n=Beta*f/360;#in rps\n",
"print \"Steps required for making 25 revolution(in rps) : \",n;"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Resolution : 360\n",
"Steps per revolution : 144.0\n",
"Steps required for making 25 revolution(in rps) : 25.0\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.3, Page 282"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#Given data :\n",
"Beta=15;#in degree\n",
"Phase=3;#no. of phase\n",
"\n",
"#Calculations&Results\n",
"#Formula : Beta*Nr=(360/phase)\n",
"Nr=(360./Phase)/Beta;#unitless\n",
"print \"No. of rotor :\",Nr;\n",
"#Case (i) : when Ns>Nr : Formula : Beta=(Ns-Nr)*360/(Ns*Nr)\n",
"Ns=Nr/(1-Beta*Nr/360);\n",
"print \"No. of stator poles if Ns>Nr :\",Ns;\n",
"#Case (ii) : when Nr>Ns : Formula : Beta=(Nr-Ns)*360/(Ns*Nr)\n",
"Ns=Nr/(1+Beta*Nr/360);\n",
"print \"No. of stator poles if Nr>Ns :\",Ns;"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"No. of rotor : 8.0\n",
"No. of stator poles if Ns>Nr : 12.0\n",
"No. of stator poles if Nr>Ns : 6.0\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 4.4, Page 282"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#Given data :\n",
"Beta=1.8;#in degree\n",
"m=4;#no. of phases\n",
"\n",
"#Calculations\n",
"#Formula : Beta*Nr=(360/m)\n",
"Nr=(360/m)/Beta;#unitless\n",
"\n",
"#Results\n",
"print \"No. of rotor teeth : = \",Nr;\n",
"print \"In multi stack motor rotor teeth equals to stator teeth equals to : \",Nr;"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"No. of rotor teeth : = 50.0\n",
"In multi stack motor rotor teeth equals to stator teeth equals to : 50.0\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
