From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 833/CH11/EX11.12/Ex11_12.sce     | 37 +++++++++++++++++++++++++++++++++++++
 833/CH11/EX11.12/Ex11_12.txt     | 37 +++++++++++++++++++++++++++++++++++++
 833/CH11/EX11.12/Result11_12.txt | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+)
 create mode 100755 833/CH11/EX11.12/Ex11_12.sce
 create mode 100755 833/CH11/EX11.12/Ex11_12.txt
 create mode 100755 833/CH11/EX11.12/Result11_12.txt

(limited to '833/CH11/EX11.12')

diff --git a/833/CH11/EX11.12/Ex11_12.sce b/833/CH11/EX11.12/Ex11_12.sce
new file mode 100755
index 000000000..f2659dfa7
--- /dev/null
+++ b/833/CH11/EX11.12/Ex11_12.sce
@@ -0,0 +1,37 @@
+//Caption:Find (a)Equivalent rotor current per phase (b)Stator current per phase (c)Power factor (d)Rotor input (e)Rotor copper losses (f)Torque (g)Mechanical power output from rotor (h)Stator input (i)Efficiency.Solve it by APPROXIMATE equivalent circuit method 
+//Exa:11.12
+clc;
+clear;
+close;
+V=440//Voltage supplied(in volts)
+p=8//Number of poles
+f=50//Frequency(in hertz)
+r1=0.2//Stator resistance(in ohm)
+x1=1.2//Stator reactance(in ohm)
+r2=0.3//Equivalent resistance of rotor referred to stator(in ohm)
+x2=1.2//Equivalent reactance of rotor referred to stator(in ohm)
+r_m=150//Magnetising resistance(in ohms)
+x_m=18//Magnetising reactance(in ohms)
+P_wf=750//Winding and friction losses(in watt)
+s=0.04//Slip
+I2=V/((r1+(r2/s))+(%i*x1)+(%i*x2))
+disp(I2,'(a)Equivalent rotor current per phase(in A)=')
+y1=1/r_m
+y2=1/(%i*x_m)
+I_o=V*(y1+y2)
+I_1=I2+I_o
+disp(I_1,'(b)Stator current per phase(in A)=')
+pf=cosd(atand(imag(I_1)/real(I_1)))
+disp(pf,'(c)Power factor=')
+P_r=(I2*conj(I2))*(r2/s)
+disp(P_r,'(d)Rotor input(in watt)=')
+P_rc=(I2*conj(I2))*r2
+disp(P_rc,'(e)Rotor copper losses(in watts)=')
+T=P_r/(2*%pi*((f*120)/(p*60)))
+disp(T,'(f)Torque(in N-m)=')
+P_me=P_r-P_rc-(P_wf/3)
+disp(P_me,'(g)Mechanical power output from rotor(in watts per phase)=')
+P_si=V*pf*(sqrt(I_1*conj(I_1)))
+disp(P_si,'(h)Stator input(in watts per phase)=')
+e=(P_me/P_si)*100
+disp(e,'(i)Efficiency (in %)=')
\ No newline at end of file
diff --git a/833/CH11/EX11.12/Ex11_12.txt b/833/CH11/EX11.12/Ex11_12.txt
new file mode 100755
index 000000000..f2659dfa7
--- /dev/null
+++ b/833/CH11/EX11.12/Ex11_12.txt
@@ -0,0 +1,37 @@
+//Caption:Find (a)Equivalent rotor current per phase (b)Stator current per phase (c)Power factor (d)Rotor input (e)Rotor copper losses (f)Torque (g)Mechanical power output from rotor (h)Stator input (i)Efficiency.Solve it by APPROXIMATE equivalent circuit method 
+//Exa:11.12
+clc;
+clear;
+close;
+V=440//Voltage supplied(in volts)
+p=8//Number of poles
+f=50//Frequency(in hertz)
+r1=0.2//Stator resistance(in ohm)
+x1=1.2//Stator reactance(in ohm)
+r2=0.3//Equivalent resistance of rotor referred to stator(in ohm)
+x2=1.2//Equivalent reactance of rotor referred to stator(in ohm)
+r_m=150//Magnetising resistance(in ohms)
+x_m=18//Magnetising reactance(in ohms)
+P_wf=750//Winding and friction losses(in watt)
+s=0.04//Slip
+I2=V/((r1+(r2/s))+(%i*x1)+(%i*x2))
+disp(I2,'(a)Equivalent rotor current per phase(in A)=')
+y1=1/r_m
+y2=1/(%i*x_m)
+I_o=V*(y1+y2)
+I_1=I2+I_o
+disp(I_1,'(b)Stator current per phase(in A)=')
+pf=cosd(atand(imag(I_1)/real(I_1)))
+disp(pf,'(c)Power factor=')
+P_r=(I2*conj(I2))*(r2/s)
+disp(P_r,'(d)Rotor input(in watt)=')
+P_rc=(I2*conj(I2))*r2
+disp(P_rc,'(e)Rotor copper losses(in watts)=')
+T=P_r/(2*%pi*((f*120)/(p*60)))
+disp(T,'(f)Torque(in N-m)=')
+P_me=P_r-P_rc-(P_wf/3)
+disp(P_me,'(g)Mechanical power output from rotor(in watts per phase)=')
+P_si=V*pf*(sqrt(I_1*conj(I_1)))
+disp(P_si,'(h)Stator input(in watts per phase)=')
+e=(P_me/P_si)*100
+disp(e,'(i)Efficiency (in %)=')
\ No newline at end of file
diff --git a/833/CH11/EX11.12/Result11_12.txt b/833/CH11/EX11.12/Result11_12.txt
new file mode 100755
index 000000000..8bc0d28b9
--- /dev/null
+++ b/833/CH11/EX11.12/Result11_12.txt
@@ -0,0 +1,36 @@
+(a)Equivalent rotor current per phase(in A)=   
+ 
+    52.083013 - 16.233666i  
+ 
+ (b)Stator current per phase(in A)=   
+ 
+    55.016346 - 40.678111i  
+ 
+ (c)Power factor=   
+ 
+    0.8040793  
+ 
+ (d)Rotor input(in watt)=   
+ 
+    22321.291  
+ 
+ (e)Rotor copper losses(in watts)=   
+ 
+    892.85165  
+ 
+ (f)Torque(in N-m)=   
+ 
+    284.20351  
+ 
+ (g)Mechanical power output from rotor(in watts per phase)=   
+ 
+    21178.44  
+ 
+ (h)Stator input(in watts per phase)=   
+ 
+    24207.192  
+ 
+ (i)Efficiency (in %)=   
+ 
+    87.488211  
+ 
\ No newline at end of file
-- 
cgit