diff options
Diffstat (limited to '3890/CH6')
22 files changed, 270 insertions, 0 deletions
diff --git a/3890/CH6/EX6.1/EX6_1.sce b/3890/CH6/EX6.1/EX6_1.sce new file mode 100644 index 000000000..d93f1c654 --- /dev/null +++ b/3890/CH6/EX6.1/EX6_1.sce @@ -0,0 +1,16 @@ +//Electric machines and power systems by Syed A Nasar +//Publisher:Tata McGraw Hill +//Year: 2002 ; Edition - 7 +//Example 6.1 +//Scilab Version : 6.0.0 ; OS : Windows + +clc; +clear; + +N=1750; //speed of the machine in rpm +Z=728; //no of conductors +f=25*10^(-3); //flux per pole + +E=f*N*Z/60; //since P=A + +printf('the voltage induced is %f V',E) diff --git a/3890/CH6/EX6.1/Ex6_1.png b/3890/CH6/EX6.1/Ex6_1.png Binary files differnew file mode 100644 index 000000000..ae48d27e6 --- /dev/null +++ b/3890/CH6/EX6.1/Ex6_1.png diff --git a/3890/CH6/EX6.10/Ex6_10.png b/3890/CH6/EX6.10/Ex6_10.png Binary files differnew file mode 100644 index 000000000..008c2ee05 --- /dev/null +++ b/3890/CH6/EX6.10/Ex6_10.png diff --git a/3890/CH6/EX6.10/Ex6_10.sce b/3890/CH6/EX6.10/Ex6_10.sce new file mode 100644 index 000000000..9a4ce1cf4 --- /dev/null +++ b/3890/CH6/EX6.10/Ex6_10.sce @@ -0,0 +1,26 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.10
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+v=230; //supply voltage in v
+I1=80; //line current in A
+N1=750; //speed at I1 in rpm
+n=15; //number of turns per pole
+Rf=0.11; //field resistance in ohm
+Ra=0.14; //armature resistance in ohms
+I2=20; //line current in A
+
+E1=v-I1*(Rf+Ra);
+E2=v-I2*(Rf+Ra);
+At1=n*I1;
+At2=n*I2;
+phi1=4.3*10^3;phi2=1.4*10^3; //from Appendix 3 in wb
+N2=N1*E2*phi1/(E1*phi2);
+
+printf('The motor speed at I2 is %f rpm',N2)
+
diff --git a/3890/CH6/EX6.11/Ex6_11.png b/3890/CH6/EX6.11/Ex6_11.png Binary files differnew file mode 100644 index 000000000..7a4fe18dc --- /dev/null +++ b/3890/CH6/EX6.11/Ex6_11.png diff --git a/3890/CH6/EX6.11/Ex6_11.sce b/3890/CH6/EX6.11/Ex6_11.sce new file mode 100644 index 000000000..f642ee36c --- /dev/null +++ b/3890/CH6/EX6.11/Ex6_11.sce @@ -0,0 +1,37 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.11
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+p=25*10^3; //power rating in w
+E=230; //generated voltage in v
+N=1200; //speed in rpm
+Ra=0.12; //armature resistance in ohm
+Rf=100; //field resistance in ohm
+Pme=300; //machanical loss in W
+pml=200; //magnetic loss in w
+At1=2500; //ampere turns per pole
+At2=1500; //ampere turns per pole
+va=200; //voltage in V
+nf=1000; //number of turns in field winding
+
+Ia=p/va;
+V=E-Ia*Ra;
+Pout=V*Ia;
+Pa=Ia^2*Ra;
+If=At1/nf;
+Pf=If^2*Rf;
+pin=Pout+Pa+Pf+Pme+pml;
+Eff=Pout/pin;
+N1=(N*2*3.14)/60; //speed in rad/s
+Tin=(pin-Pf)/N1;
+Vreg=(E-V)*100/V;
+
+printf('armature terminal voltage is %f V\n',V)
+printf('Effeciency is %f\n',Eff)
+printf('Input torque is %f Nm\n',Tin)
+printf('Voltage regulation is %f in percentage',Vreg)
diff --git a/3890/CH6/EX6.12/Ex6_12.png b/3890/CH6/EX6.12/Ex6_12.png Binary files differnew file mode 100644 index 000000000..57b173b41 --- /dev/null +++ b/3890/CH6/EX6.12/Ex6_12.png diff --git a/3890/CH6/EX6.12/Ex6_12.sce b/3890/CH6/EX6.12/Ex6_12.sce new file mode 100644 index 000000000..f63b0362f --- /dev/null +++ b/3890/CH6/EX6.12/Ex6_12.sce @@ -0,0 +1,23 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.12
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+At1=2000; //amper eturns per pole
+Va=250; //armature voltage in v
+Ia=100; //armature current in A
+Ra=0.12; //armature resistance in ohm
+N=1200; //speed in rpm
+
+E=Va-Ia*Ra;
+E1=212; //from graph 6.41
+N1=N*E/E1;
+n1=N1*2*3.14/60;
+T=E*Ia/n1;
+
+printf('The motor speed is %f rpm[%f rad/s]\n',N1,n1);
+printf('the torque is %f Nm',T)
diff --git a/3890/CH6/EX6.13/Ex6_13.png b/3890/CH6/EX6.13/Ex6_13.png Binary files differnew file mode 100644 index 000000000..2ebd2596a --- /dev/null +++ b/3890/CH6/EX6.13/Ex6_13.png diff --git a/3890/CH6/EX6.13/Ex6_13.sce b/3890/CH6/EX6.13/Ex6_13.sce new file mode 100644 index 000000000..3aee1ad31 --- /dev/null +++ b/3890/CH6/EX6.13/Ex6_13.sce @@ -0,0 +1,26 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.13
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+At1=2000; //amper eturns per pole
+Va=250; //armature voltage in v
+Ia=100; //armature current in A
+Ra=0.12; //armature resistance in ohm
+N=1200; //speed in rpm
+Atloss=250; //due to demagnetising effect
+
+Atnew=At1-Atloss;
+E=Va-Ia*Ra;
+E1=202; //from graph 6.41 at Atnew
+N1=N*E/E1;
+n1=N1*2*3.14/60;
+T=E*Ia/n1;
+
+
+printf('The motor speed is %f rpm[%f rad/s]\n',N1,n1);
+printf('the torque is %f Nm',T)
diff --git a/3890/CH6/EX6.2/Ex6_2.png b/3890/CH6/EX6.2/Ex6_2.png Binary files differnew file mode 100644 index 000000000..bad53db39 --- /dev/null +++ b/3890/CH6/EX6.2/Ex6_2.png diff --git a/3890/CH6/EX6.2/Ex6_2.sce b/3890/CH6/EX6.2/Ex6_2.sce new file mode 100644 index 000000000..4a86a9473 --- /dev/null +++ b/3890/CH6/EX6.2/Ex6_2.sce @@ -0,0 +1,16 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:TataMcgraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.2
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+z=576; //no of conductors
+Ia=123.5; //armature current in A
+f=20*10^-3; //flux in wb
+
+Te=z*f*Ia/(2*3.14);
+
+printf('The electro magnetic torque required is %f Nm',Te)
diff --git a/3890/CH6/EX6.3/Ex6_3.png b/3890/CH6/EX6.3/Ex6_3.png Binary files differnew file mode 100644 index 000000000..94710b3b8 --- /dev/null +++ b/3890/CH6/EX6.3/Ex6_3.png diff --git a/3890/CH6/EX6.3/Ex6_3.sce b/3890/CH6/EX6.3/Ex6_3.sce new file mode 100644 index 000000000..3fbbbb85c --- /dev/null +++ b/3890/CH6/EX6.3/Ex6_3.sce @@ -0,0 +1,18 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:TataMcgraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.3
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+z=576; //no of conductors
+Ia=123.5; //armature current in A
+f=20*10^-3; //flux in wb
+w=150; //angular velocity in rad/s
+
+Te=z*f*Ia/(2*3.14);
+E=Te*w/Ia;
+
+printf('The induced emf is %f V',E)
diff --git a/3890/CH6/EX6.4/EX6_4.sce b/3890/CH6/EX6.4/EX6_4.sce new file mode 100644 index 000000000..f5b01a609 --- /dev/null +++ b/3890/CH6/EX6.4/EX6_4.sce @@ -0,0 +1,24 @@ +//Electric machines and power systems by Syed A Nasar +//Publisher:Tata McGraw Hill +//Year: 2002 ; Edition - 7 +//Example 6.4 +//Scilab Version : 6.0.0 ; OS : Windows + +clc; +clear; + +V=250; //supply voltage +Ra=.25; //armature resistance +Rf=125; //field resistance +Il0=5;n1=1200; //no load current and speed +Il1=52; //full load current at certain load + +If=V/Rf; +Ia0=Il0-If; +E1=V-Ia0*Ra; +Ia1=Il1-If; +E2=V-Ia1*Ra; + +n2=E2*n1/E1; + +printf('The full load speed is %d rpm',n2) diff --git a/3890/CH6/EX6.4/Ex6_4.png b/3890/CH6/EX6.4/Ex6_4.png Binary files differnew file mode 100644 index 000000000..73c460fb2 --- /dev/null +++ b/3890/CH6/EX6.4/Ex6_4.png diff --git a/3890/CH6/EX6.6/EX6_6.png b/3890/CH6/EX6.6/EX6_6.png Binary files differnew file mode 100644 index 000000000..6bfcfeb01 --- /dev/null +++ b/3890/CH6/EX6.6/EX6_6.png diff --git a/3890/CH6/EX6.6/EX6_6.sce b/3890/CH6/EX6.6/EX6_6.sce new file mode 100644 index 000000000..2a75033e7 --- /dev/null +++ b/3890/CH6/EX6.6/EX6_6.sce @@ -0,0 +1,26 @@ +//Electric machines and power systems by Syed A Nasar +//Publisher:Tata McGraw Hill +//Year: 2002 ; Edition - 7 +//Example 6.6 +//Scilab Version : 6.0.0 ; OS : Windows + +clc; +clear; + +P=50*10^3; +V=250; +Ra=.06; +Rf=125; +Vd=2; +Rse=0.04; + +I=P/V; +V1=I*Rse; +Vf=V+V1; +If=Vf/Rf; +Ia=I+If; +Va=Ia*Ra; +E=V+Va+V1+Vd; + +printf('The terminal voltage is %f V\n',Va); +printf('the induced emf is %f V',E); diff --git a/3890/CH6/EX6.7/EX6_7.png b/3890/CH6/EX6.7/EX6_7.png Binary files differnew file mode 100644 index 000000000..4ce346be3 --- /dev/null +++ b/3890/CH6/EX6.7/EX6_7.png diff --git a/3890/CH6/EX6.7/Ex6_7.sce b/3890/CH6/EX6.7/Ex6_7.sce new file mode 100644 index 000000000..3bd8d007d --- /dev/null +++ b/3890/CH6/EX6.7/Ex6_7.sce @@ -0,0 +1,28 @@ +//Electric machines and power systems by Syed A Nasar +//Publisher:Tata McGraw Hill +//Year: 2002 ; Edition - 7 +//Example 6.7 +//Scilab Version : 6.0.0 ; OS : Windows + +clc; +clear; + +V=230; //supply voltage in v +Ra=.05; //armature resistance in ohms +Rf1=75; //field resistance in no load in ohms +Rf2=100; //field resistance in on load condition in ohms +I1=7;N1=1120; //no load current and speed +I2=46; //on load current in A + +If=V/Rf1; +Ia1=I1-If; +K=(V-Ia1*Ra)/(N1*If); +Ia2=I2-If; +N=(V-Ia2*Ra)/(If*K); + +If1=V/Rf2; +Ia0=I2-If1; +n=(V-Ia0*Ra)/(If1*K); + +printf('the motor speed at line current of 46 A is %f rpm\n',N) +printf('the new motor speed is %f rpm',n) diff --git a/3890/CH6/EX6.8/Ex6_8.png b/3890/CH6/EX6.8/Ex6_8.png Binary files differnew file mode 100644 index 000000000..3b5e8da02 --- /dev/null +++ b/3890/CH6/EX6.8/Ex6_8.png diff --git a/3890/CH6/EX6.8/Ex6_8.sce b/3890/CH6/EX6.8/Ex6_8.sce new file mode 100644 index 000000000..8ca42e251 --- /dev/null +++ b/3890/CH6/EX6.8/Ex6_8.sce @@ -0,0 +1,30 @@ +//Electric machines and power systems by Syed A Nasar
+//Publisher:Tata McGraw Hill
+//Year: 2002 ; Edition - 7
+//Example 6.8
+//Scilab Version : 6.0.0 ; OS : Windows
+
+clc;
+clear;
+
+V=230; //supply voltage in v
+Ra=.05; //armature resistance in ohms
+Rf1=75; //field resistance in no load in ohms
+Rf2=100; //field resistance in on load condition in ohms
+I1=7;N1=1120; //no load current and speed
+I2=46; //on load current in A
+Ra2=0.15 //armature resistance at on load condition in ohms
+
+If=V/Rf1;
+Ia1=I1-If;
+K=(V-Ia1*Ra)/(N1*If);
+Ia2=I2-If;
+N=(V-Ia2*Ra)/(If*K);
+
+If1=V/Rf1;
+Ia0=I2-If1;
+n=(V-Ia2*Ra2)/(If1*K);
+pl=(Ia0^2)*0.1;
+
+printf('speed of the motor is %d rpm\n',n)
+printf('power dissipated in 0.1 ohm resistor is %f W',pl)
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