blob: 8ab814ab4a97a8e52ba8b92bc9dd31846fbaed33 (
plain)
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
|
//CHAPTER 8- DIRECT CURRENT MACHINES
//Example 25
disp("CHAPTER 8");
disp("EXAMPLE 25");
//VARIABLE INITIALIZATION
slot=24; //number of slots
P=2; //number of poles
N=18; //number of turns per coil
B=1; //in Webers
l=20/100; //effective length in meters
rad=10/100; //radius in meters
w=183.2; //angular velocity in rad/s
//SOLUTION
A=2;
Z=slot*P*N; //total number of conductors
ar1=(2*%pi*rad*l)/P;
ar2=ar1*0.8; //since the magnetic poles 80% of the armature periphery
phi=B*ar2; //effective flux per pole
//solution (a)
E_a=(P*Z*phi*w)/(2*%pi*A);
disp(sprintf("(a) The induced emf is %f V",E_a));
//solution (b)
coil=slot/P; //number of coils in each path
E_coil=E_a/coil;
disp(sprintf("(b) The induced emf per coil is %f V",E_coil));
//solution (c)
E_turn=E_coil/N;
disp(sprintf("(c) The induced emf per turn is %f V",E_turn));
//solution (d)
E_cond=E_turn/A;
disp(sprintf("(d) The induced emf per conductor is %f V",E_cond));
//The answers are slightly different due to the precision of floating point numbers
//END
|
