diff options
Diffstat (limited to '833/CH7')
33 files changed, 479 insertions, 0 deletions
diff --git a/833/CH7/EX7.10/Ex7_10.sce b/833/CH7/EX7.10/Ex7_10.sce new file mode 100755 index 000000000..84a6ed1a2 --- /dev/null +++ b/833/CH7/EX7.10/Ex7_10.sce @@ -0,0 +1,18 @@ +//Caption: Calculate the speed of the motor when it is loaded and takes 60A from the mains
+//Exa:7.10
+clc;
+clear;
+close;
+V=230//Voltage of motor(in volts)
+n=800//Speedof motor(in r.p.m)
+i=5//Current taken by motor(in A)
+r_a=0.25//Armature resistance(in ohms)
+r_f=230//field resistance(in ohms)
+i_l=60//Load current(in A)
+i_f=V/r_f
+i_a=i-i_f
+E_b1=V-(i_a*r_a)
+i_al=i_l-i_f
+E_b2=V-(i_al*r_a)
+N=(n*E_b2)/E_b1
+disp(N,'Required speed of motor(in r.p.m) is=')
\ No newline at end of file diff --git a/833/CH7/EX7.10/Ex7_10.txt b/833/CH7/EX7.10/Ex7_10.txt new file mode 100755 index 000000000..84a6ed1a2 --- /dev/null +++ b/833/CH7/EX7.10/Ex7_10.txt @@ -0,0 +1,18 @@ +//Caption: Calculate the speed of the motor when it is loaded and takes 60A from the mains
+//Exa:7.10
+clc;
+clear;
+close;
+V=230//Voltage of motor(in volts)
+n=800//Speedof motor(in r.p.m)
+i=5//Current taken by motor(in A)
+r_a=0.25//Armature resistance(in ohms)
+r_f=230//field resistance(in ohms)
+i_l=60//Load current(in A)
+i_f=V/r_f
+i_a=i-i_f
+E_b1=V-(i_a*r_a)
+i_al=i_l-i_f
+E_b2=V-(i_al*r_a)
+N=(n*E_b2)/E_b1
+disp(N,'Required speed of motor(in r.p.m) is=')
\ No newline at end of file diff --git a/833/CH7/EX7.10/Result7_10.txt b/833/CH7/EX7.10/Result7_10.txt new file mode 100755 index 000000000..3ec2d7d34 --- /dev/null +++ b/833/CH7/EX7.10/Result7_10.txt @@ -0,0 +1,4 @@ +Required speed of motor(in r.p.m) is=
+
+ 751.96507
+
\ No newline at end of file diff --git a/833/CH7/EX7.11/Ex7_11.sce b/833/CH7/EX7.11/Ex7_11.sce new file mode 100755 index 000000000..2cb6e029f --- /dev/null +++ b/833/CH7/EX7.11/Ex7_11.sce @@ -0,0 +1,16 @@ +//Caption: Calculate Power and torque developed
+//Exa:7.11
+clc;
+clear;
+close;
+p=4//Number of poles
+d=20//Diameter of armature(in cm)
+l=25//Core length(in cm)
+c=300//Number of conductors
+i_a=50//Armature current(in A)
+B=0.3//Average flux density(in weber/m^2)
+n=1000//Speedofmotor(in r.p.m)
+T=(B*(l/100)*(i_a/p)*c*(d/100)*(1/2))
+s=(2*%pi*n)/(60)
+P=(T*s)/1000
+disp(T,P,'Power(in KW) and Torque(in Nm) developed is=')
\ No newline at end of file diff --git a/833/CH7/EX7.11/Ex7_11.txt b/833/CH7/EX7.11/Ex7_11.txt new file mode 100755 index 000000000..2cb6e029f --- /dev/null +++ b/833/CH7/EX7.11/Ex7_11.txt @@ -0,0 +1,16 @@ +//Caption: Calculate Power and torque developed
+//Exa:7.11
+clc;
+clear;
+close;
+p=4//Number of poles
+d=20//Diameter of armature(in cm)
+l=25//Core length(in cm)
+c=300//Number of conductors
+i_a=50//Armature current(in A)
+B=0.3//Average flux density(in weber/m^2)
+n=1000//Speedofmotor(in r.p.m)
+T=(B*(l/100)*(i_a/p)*c*(d/100)*(1/2))
+s=(2*%pi*n)/(60)
+P=(T*s)/1000
+disp(T,P,'Power(in KW) and Torque(in Nm) developed is=')
\ No newline at end of file diff --git a/833/CH7/EX7.11/Result7_11.txt b/833/CH7/EX7.11/Result7_11.txt new file mode 100755 index 000000000..ab3cc8033 --- /dev/null +++ b/833/CH7/EX7.11/Result7_11.txt @@ -0,0 +1,6 @@ +Power(in KW) and Torque(in Nm) developed is=
+
+ 2.9452431
+
+ 28.125
+
\ No newline at end of file diff --git a/833/CH7/EX7.12/Ex7_12.sce b/833/CH7/EX7.12/Ex7_12.sce new file mode 100755 index 000000000..cfd2cb63e --- /dev/null +++ b/833/CH7/EX7.12/Ex7_12.sce @@ -0,0 +1,15 @@ +//Caption: Determineper pole (a)Number of cross magnetising ampereturns,and (b)Demagnetising ampereturns
+//Exa:7.12
+clc;
+clear;
+close;
+I=100//Current(in A)
+c=500//Armature conductors
+p=6//Poles
+t=10//Angle of lead(in degree)
+a=2//Wave wound
+e=(10*p)/2
+F_d=(c*I*2*e)/(2*a*p*180)
+disp(F_d,'(a)Number of cross magnetising ampereturns=')
+F_c=(c*I)*(1-((2*e)/180))/(2*a*p)
+disp(F_c,'(b)Demagnetising ampereturns=')
\ No newline at end of file diff --git a/833/CH7/EX7.12/Ex7_12.txt b/833/CH7/EX7.12/Ex7_12.txt new file mode 100755 index 000000000..cfd2cb63e --- /dev/null +++ b/833/CH7/EX7.12/Ex7_12.txt @@ -0,0 +1,15 @@ +//Caption: Determineper pole (a)Number of cross magnetising ampereturns,and (b)Demagnetising ampereturns
+//Exa:7.12
+clc;
+clear;
+close;
+I=100//Current(in A)
+c=500//Armature conductors
+p=6//Poles
+t=10//Angle of lead(in degree)
+a=2//Wave wound
+e=(10*p)/2
+F_d=(c*I*2*e)/(2*a*p*180)
+disp(F_d,'(a)Number of cross magnetising ampereturns=')
+F_c=(c*I)*(1-((2*e)/180))/(2*a*p)
+disp(F_c,'(b)Demagnetising ampereturns=')
\ No newline at end of file diff --git a/833/CH7/EX7.12/Result7_12.txt b/833/CH7/EX7.12/Result7_12.txt new file mode 100755 index 000000000..d373d279c --- /dev/null +++ b/833/CH7/EX7.12/Result7_12.txt @@ -0,0 +1,8 @@ + (a)Number of cross magnetising ampereturns=
+
+ 694.44444
+
+ (b)Demagnetising ampereturns=
+
+ 1388.8889
+
\ No newline at end of file diff --git a/833/CH7/EX7.13/Ex7_13.sce b/833/CH7/EX7.13/Ex7_13.sce new file mode 100755 index 000000000..f1657c3d0 --- /dev/null +++ b/833/CH7/EX7.13/Ex7_13.sce @@ -0,0 +1,17 @@ +//Caption:Find the time of Commutation
+//Exa:7.13
+clc;
+clear;
+close;
+p=4//Number of poles
+n=600//Speed of generator(in r.p.m)
+d=0.4//Diameter of commutator(in m)
+c=243//Number ofcommutator segments
+c_s=3//Coil sides per layer
+w=12.5//Width of brush(in mm)
+W=0.6//Width of mica between commutator segments
+W_c=(%pi*d*1000)/(c)
+D=w-W+(2*W_c)
+V_c=(%pi*d*n)/60
+T=D/V_c*(10^(-3))
+disp(T,'Time of commutation(in sec)=')
\ No newline at end of file diff --git a/833/CH7/EX7.13/Ex7_13.txt b/833/CH7/EX7.13/Ex7_13.txt new file mode 100755 index 000000000..f1657c3d0 --- /dev/null +++ b/833/CH7/EX7.13/Ex7_13.txt @@ -0,0 +1,17 @@ +//Caption:Find the time of Commutation
+//Exa:7.13
+clc;
+clear;
+close;
+p=4//Number of poles
+n=600//Speed of generator(in r.p.m)
+d=0.4//Diameter of commutator(in m)
+c=243//Number ofcommutator segments
+c_s=3//Coil sides per layer
+w=12.5//Width of brush(in mm)
+W=0.6//Width of mica between commutator segments
+W_c=(%pi*d*1000)/(c)
+D=w-W+(2*W_c)
+V_c=(%pi*d*n)/60
+T=D/V_c*(10^(-3))
+disp(T,'Time of commutation(in sec)=')
\ No newline at end of file diff --git a/833/CH7/EX7.13/Result7_13.txt b/833/CH7/EX7.13/Result7_13.txt new file mode 100755 index 000000000..53baa06da --- /dev/null +++ b/833/CH7/EX7.13/Result7_13.txt @@ -0,0 +1,4 @@ + Time of commutation(in sec)=
+
+ 0.0017700
+
\ No newline at end of file diff --git a/833/CH7/EX7.14/Ex7_14.sce b/833/CH7/EX7.14/Ex7_14.sce new file mode 100755 index 000000000..c51280bee --- /dev/null +++ b/833/CH7/EX7.14/Ex7_14.sce @@ -0,0 +1,13 @@ +//Caption: Find average reactance voltage produce due to commutation
+//Exa:7.14
+clc;
+clear;
+close;
+p=4//Number of poles
+I=300//Current delievered by generator on full load(in A)
+L=0.02*(10^(-3))//Inductance of each coil(in mH)
+a=2//Wavw wound
+i=I/2//Current in conductors in each path(in A)
+T_c=0.00174//Time of commutation(in sec)
+E_r=(2*L*i)/T_c
+disp(E_r,'Average reactance voltage(in volts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.14/Ex7_14.txt b/833/CH7/EX7.14/Ex7_14.txt new file mode 100755 index 000000000..c51280bee --- /dev/null +++ b/833/CH7/EX7.14/Ex7_14.txt @@ -0,0 +1,13 @@ +//Caption: Find average reactance voltage produce due to commutation
+//Exa:7.14
+clc;
+clear;
+close;
+p=4//Number of poles
+I=300//Current delievered by generator on full load(in A)
+L=0.02*(10^(-3))//Inductance of each coil(in mH)
+a=2//Wavw wound
+i=I/2//Current in conductors in each path(in A)
+T_c=0.00174//Time of commutation(in sec)
+E_r=(2*L*i)/T_c
+disp(E_r,'Average reactance voltage(in volts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.14/Result7_14.txt b/833/CH7/EX7.14/Result7_14.txt new file mode 100755 index 000000000..02ea36d66 --- /dev/null +++ b/833/CH7/EX7.14/Result7_14.txt @@ -0,0 +1,4 @@ + Average reactance voltage(in volts)=
+
+ 3.4482759
+
\ No newline at end of file diff --git a/833/CH7/EX7.15/Ex7_15.sce b/833/CH7/EX7.15/Ex7_15.sce new file mode 100755 index 000000000..cd9802f13 --- /dev/null +++ b/833/CH7/EX7.15/Ex7_15.sce @@ -0,0 +1,18 @@ +//Caption: Calculate the number of turns needed on each commutating pole
+//Exa:7.15
+clc;
+clear;
+close;
+p=4//Number of poles
+P=125000//Power delievered by generator(in watts)
+V=230//Voltage of generator(in volts)
+z=240//Armature conductors
+B=0.3//Flux density under the interpolar gap(in weber/m^2)
+g=0.01//Interpolar airgap(in m)
+a=p//LAP connection
+I_a=P/V
+F_a=(z*I_a)/(2*a*p)
+A=(B*g)/(4*%pi*(10^(-7)))
+A_t=A+F_a
+T=A_t/I_a
+disp(T,'The number of turns on each commutating pole=')
\ No newline at end of file diff --git a/833/CH7/EX7.15/Ex7_15.txt b/833/CH7/EX7.15/Ex7_15.txt new file mode 100755 index 000000000..cd9802f13 --- /dev/null +++ b/833/CH7/EX7.15/Ex7_15.txt @@ -0,0 +1,18 @@ +//Caption: Calculate the number of turns needed on each commutating pole
+//Exa:7.15
+clc;
+clear;
+close;
+p=4//Number of poles
+P=125000//Power delievered by generator(in watts)
+V=230//Voltage of generator(in volts)
+z=240//Armature conductors
+B=0.3//Flux density under the interpolar gap(in weber/m^2)
+g=0.01//Interpolar airgap(in m)
+a=p//LAP connection
+I_a=P/V
+F_a=(z*I_a)/(2*a*p)
+A=(B*g)/(4*%pi*(10^(-7)))
+A_t=A+F_a
+T=A_t/I_a
+disp(T,'The number of turns on each commutating pole=')
\ No newline at end of file diff --git a/833/CH7/EX7.15/Result7_15.txt b/833/CH7/EX7.15/Result7_15.txt new file mode 100755 index 000000000..7be861f1c --- /dev/null +++ b/833/CH7/EX7.15/Result7_15.txt @@ -0,0 +1,4 @@ + The number of turns on each commutating pole=
+
+ 11.892676
+
\ No newline at end of file diff --git a/833/CH7/EX7.3/Ex7_3.sce b/833/CH7/EX7.3/Ex7_3.sce new file mode 100755 index 000000000..96c85bd5a --- /dev/null +++ b/833/CH7/EX7.3/Ex7_3.sce @@ -0,0 +1,20 @@ +//Caption:Find effect of change in connection on voltage,current and output
+//Exa:7.3
+clc;
+clear;
+close;
+P=50000//Power of generator(in watt)
+V_b1=230//Voltage of generator(in volts)
+p=4//Number of poles
+a=4//Number of parallel paths for lap winding
+b=2//Number of parallel paths for wave winding
+C=268//Number of conductors with LAP winding
+t=2//Two turns coils are used
+c=t*2//Conductors per slot
+n=C/c
+I_1=P/(V_b1)
+V_b2=V_b1*b
+I_2=P/(V_b2)
+disp(V_b1,I_1,'Current(in A) and voltage(in volts) for LAP winding=')
+disp(V_b2,I_2,'Current(in A) and voltage(in volts) for WAVE winding=')
+disp(P,'Output is same for both connections(in watts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.3/Ex7_3.txt b/833/CH7/EX7.3/Ex7_3.txt new file mode 100755 index 000000000..96c85bd5a --- /dev/null +++ b/833/CH7/EX7.3/Ex7_3.txt @@ -0,0 +1,20 @@ +//Caption:Find effect of change in connection on voltage,current and output
+//Exa:7.3
+clc;
+clear;
+close;
+P=50000//Power of generator(in watt)
+V_b1=230//Voltage of generator(in volts)
+p=4//Number of poles
+a=4//Number of parallel paths for lap winding
+b=2//Number of parallel paths for wave winding
+C=268//Number of conductors with LAP winding
+t=2//Two turns coils are used
+c=t*2//Conductors per slot
+n=C/c
+I_1=P/(V_b1)
+V_b2=V_b1*b
+I_2=P/(V_b2)
+disp(V_b1,I_1,'Current(in A) and voltage(in volts) for LAP winding=')
+disp(V_b2,I_2,'Current(in A) and voltage(in volts) for WAVE winding=')
+disp(P,'Output is same for both connections(in watts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.3/Result7_3.txt b/833/CH7/EX7.3/Result7_3.txt new file mode 100755 index 000000000..4eb5a8cd9 --- /dev/null +++ b/833/CH7/EX7.3/Result7_3.txt @@ -0,0 +1,16 @@ + Current(in A) and voltage(in volts) for LAP winding=
+
+ 217.3913
+
+ 230.
+
+ Current(in A) and voltage(in volts) for WAVE winding=
+
+ 108.69565
+
+ 460.
+
+ Output is same for both connections(in watts)=
+
+ 50000.
+
\ No newline at end of file diff --git a/833/CH7/EX7.6/Ex7_6.sce b/833/CH7/EX7.6/Ex7_6.sce new file mode 100755 index 000000000..0912cb0ab --- /dev/null +++ b/833/CH7/EX7.6/Ex7_6.sce @@ -0,0 +1,20 @@ +//Caption: Select a two circuit armature winding for a d.c machine
+//Exa:7.6
+clc;
+clear;
+close;
+p=4//Number of poles
+n=1000//Speed of d.c. machine(in r.p.m)
+V=400//Voltage of d.cmachine(in volts)
+B=0.04//Flux per pole(in weber)
+s_1=41//Slot 1
+s_2=45//Slot 2
+s_3=51//Slot 3
+a=2//Number of parallel paths
+Z=(V*60*a)/(B*n*p)
+Z_c=Z/a
+Y=(s_3+1)/(p/2)
+t=3//turns per coil
+c=t*a
+z=s_3*c
+disp(z,c,t,s_3,'slots,turn coils,coils sides per slot and total number of conductors=')
\ No newline at end of file diff --git a/833/CH7/EX7.6/Ex7_6.txt b/833/CH7/EX7.6/Ex7_6.txt new file mode 100755 index 000000000..0912cb0ab --- /dev/null +++ b/833/CH7/EX7.6/Ex7_6.txt @@ -0,0 +1,20 @@ +//Caption: Select a two circuit armature winding for a d.c machine
+//Exa:7.6
+clc;
+clear;
+close;
+p=4//Number of poles
+n=1000//Speed of d.c. machine(in r.p.m)
+V=400//Voltage of d.cmachine(in volts)
+B=0.04//Flux per pole(in weber)
+s_1=41//Slot 1
+s_2=45//Slot 2
+s_3=51//Slot 3
+a=2//Number of parallel paths
+Z=(V*60*a)/(B*n*p)
+Z_c=Z/a
+Y=(s_3+1)/(p/2)
+t=3//turns per coil
+c=t*a
+z=s_3*c
+disp(z,c,t,s_3,'slots,turn coils,coils sides per slot and total number of conductors=')
\ No newline at end of file diff --git a/833/CH7/EX7.6/Result7_6.txt b/833/CH7/EX7.6/Result7_6.txt new file mode 100755 index 000000000..065894342 --- /dev/null +++ b/833/CH7/EX7.6/Result7_6.txt @@ -0,0 +1,10 @@ +slots,turn coils,coils sides per slot and total number of conductors=
+
+ 51.
+
+ 3.
+
+ 6.
+
+ 306.
+
\ No newline at end of file diff --git a/833/CH7/EX7.7/Ex7_7.sce b/833/CH7/EX7.7/Ex7_7.sce new file mode 100755 index 000000000..59bb4e1ba --- /dev/null +++ b/833/CH7/EX7.7/Ex7_7.sce @@ -0,0 +1,19 @@ +//Caption: Find (a)e.m.f generated at 750r.p.m for lap wound (b)e.m.f generated at 600r.p.m for wave wound (c)Speed to be driven for 400V for same flux per pole
+//Exa:7.7
+clc;
+clear;
+close;
+p=4//Number of poles
+B=0.04//Flux per pole(in weber)
+c=740//Number of conductors for lap connection
+n_1=750//Speed of machine(in r.p.m)
+n_2=600//Speed of machine(in r.p.m)
+V=400//Voltage of machine(in volts)
+a=4//Number of parallel paths for lap winding
+b=2//Number of parallel paths for wave winding
+E=(B*c*n_1*p)/(60*a)
+disp(E,'(a)E.M.F generated at 750r.p.m for lap wound(in volts)=')
+E_1=(B*c*n_2*p)/(60*b)
+disp(E_1,'(b)E.M.F generated at 600r.p.m for wavewound(in volts)=')
+n=(V*60*b)/(B*c*p)
+disp(n,'(c)Speed of machine(in r.p.m)=')
\ No newline at end of file diff --git a/833/CH7/EX7.7/Ex7_7.txt b/833/CH7/EX7.7/Ex7_7.txt new file mode 100755 index 000000000..59bb4e1ba --- /dev/null +++ b/833/CH7/EX7.7/Ex7_7.txt @@ -0,0 +1,19 @@ +//Caption: Find (a)e.m.f generated at 750r.p.m for lap wound (b)e.m.f generated at 600r.p.m for wave wound (c)Speed to be driven for 400V for same flux per pole
+//Exa:7.7
+clc;
+clear;
+close;
+p=4//Number of poles
+B=0.04//Flux per pole(in weber)
+c=740//Number of conductors for lap connection
+n_1=750//Speed of machine(in r.p.m)
+n_2=600//Speed of machine(in r.p.m)
+V=400//Voltage of machine(in volts)
+a=4//Number of parallel paths for lap winding
+b=2//Number of parallel paths for wave winding
+E=(B*c*n_1*p)/(60*a)
+disp(E,'(a)E.M.F generated at 750r.p.m for lap wound(in volts)=')
+E_1=(B*c*n_2*p)/(60*b)
+disp(E_1,'(b)E.M.F generated at 600r.p.m for wavewound(in volts)=')
+n=(V*60*b)/(B*c*p)
+disp(n,'(c)Speed of machine(in r.p.m)=')
\ No newline at end of file diff --git a/833/CH7/EX7.7/Result7_7.txt b/833/CH7/EX7.7/Result7_7.txt new file mode 100755 index 000000000..09d1ce11e --- /dev/null +++ b/833/CH7/EX7.7/Result7_7.txt @@ -0,0 +1,12 @@ +(a)E.M.F generated at 750r.p.m for lap wound(in volts)=
+
+ 370.
+
+ (b)E.M.F generated at 600r.p.m for wavewound(in volts)=
+
+ 592.
+
+ (c)Speed of machine(in r.p.m)=
+
+ 405.40541
+
\ No newline at end of file diff --git a/833/CH7/EX7.8/Ex7_8.sce b/833/CH7/EX7.8/Ex7_8.sce new file mode 100755 index 000000000..023d5c513 --- /dev/null +++ b/833/CH7/EX7.8/Ex7_8.sce @@ -0,0 +1,19 @@ +//Caption: Calculate (a)Total armature current (b)Current per armature path (c)Generated e.m.f
+//Exa:7.8
+clc;
+clear;
+close;
+p=4//Number of poles
+P=4000//Power of generator(in watts)
+V=230//Voltage of generator(in volts)
+r_f=115//Field resistance(in ohms)
+r_a=0.1//Armature resistance(in ohms)
+a=p//number of parallel paths
+i_f=V/r_f
+i_l=P/V
+I_a=i_l+i_f
+disp(I_a,'(a)Armature current(in A)=')
+i=I_a/p
+disp(i,'(b)Current per armature path(in A)=')
+E=V+(I_a*r_a)
+disp(E,'(c)E.M.F generated(in volts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.8/Ex7_8.txt b/833/CH7/EX7.8/Ex7_8.txt new file mode 100755 index 000000000..023d5c513 --- /dev/null +++ b/833/CH7/EX7.8/Ex7_8.txt @@ -0,0 +1,19 @@ +//Caption: Calculate (a)Total armature current (b)Current per armature path (c)Generated e.m.f
+//Exa:7.8
+clc;
+clear;
+close;
+p=4//Number of poles
+P=4000//Power of generator(in watts)
+V=230//Voltage of generator(in volts)
+r_f=115//Field resistance(in ohms)
+r_a=0.1//Armature resistance(in ohms)
+a=p//number of parallel paths
+i_f=V/r_f
+i_l=P/V
+I_a=i_l+i_f
+disp(I_a,'(a)Armature current(in A)=')
+i=I_a/p
+disp(i,'(b)Current per armature path(in A)=')
+E=V+(I_a*r_a)
+disp(E,'(c)E.M.F generated(in volts)=')
\ No newline at end of file diff --git a/833/CH7/EX7.8/Result7_8.txt b/833/CH7/EX7.8/Result7_8.txt new file mode 100755 index 000000000..1c276cce2 --- /dev/null +++ b/833/CH7/EX7.8/Result7_8.txt @@ -0,0 +1,11 @@ +(a)Armature current(in A)=
+
+ 19.391304
+
+ (b)Current per armature path(in A)=
+
+ 4.8478261
+
+ (c)E.M.F generated(in volts)=
+
+ 231.93913
\ No newline at end of file diff --git a/833/CH7/EX7.9/Ex7_9.sce b/833/CH7/EX7.9/Ex7_9.sce new file mode 100755 index 000000000..b41e432ba --- /dev/null +++ b/833/CH7/EX7.9/Ex7_9.sce @@ -0,0 +1,23 @@ +//Caption:Find the speed at which it will run as a motor
+//Exa:7.9
+clc;
+clear;
+close;
+P_g=110000//Power of generator(in watts)
+n=400//Speed of generator(in r.p.m)
+V=220//Voltage of busbars(in volts)
+P_m=10900//Power of motor(in watt)
+r_a=0.025//Armature resistance(in ohms)
+r_f=55//Field resistance(in ohms)
+v_b=1//Voltage drop at each brush(in volt)
+i_l=P_g/V
+i_f=V/r_f
+I_a=i_l+i_f
+V_a=I_a*r_a
+E=V+V_a+(2*v_b)
+I_1=P_m/V
+i_a=I_1-i_f
+v_a=i_a*r_a
+E_b=V-(i_a*r_a)-(2*v_b)
+N_m=(n*E_b)/E
+disp(N_m,'Speed at which generator will run as motor is(in r.p.m)=')
\ No newline at end of file diff --git a/833/CH7/EX7.9/Ex7_9.txt b/833/CH7/EX7.9/Ex7_9.txt new file mode 100755 index 000000000..b41e432ba --- /dev/null +++ b/833/CH7/EX7.9/Ex7_9.txt @@ -0,0 +1,23 @@ +//Caption:Find the speed at which it will run as a motor
+//Exa:7.9
+clc;
+clear;
+close;
+P_g=110000//Power of generator(in watts)
+n=400//Speed of generator(in r.p.m)
+V=220//Voltage of busbars(in volts)
+P_m=10900//Power of motor(in watt)
+r_a=0.025//Armature resistance(in ohms)
+r_f=55//Field resistance(in ohms)
+v_b=1//Voltage drop at each brush(in volt)
+i_l=P_g/V
+i_f=V/r_f
+I_a=i_l+i_f
+V_a=I_a*r_a
+E=V+V_a+(2*v_b)
+I_1=P_m/V
+i_a=I_1-i_f
+v_a=i_a*r_a
+E_b=V-(i_a*r_a)-(2*v_b)
+N_m=(n*E_b)/E
+disp(N_m,'Speed at which generator will run as motor is(in r.p.m)=')
\ No newline at end of file diff --git a/833/CH7/EX7.9/Result7_9.txt b/833/CH7/EX7.9/Result7_9.txt new file mode 100755 index 000000000..24f76682d --- /dev/null +++ b/833/CH7/EX7.9/Result7_9.txt @@ -0,0 +1,4 @@ +Speed at which generator will run as motor is(in r.p.m)=
+
+ 369.7551
+
\ No newline at end of file |