diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /380/CH4/EX4.7 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '380/CH4/EX4.7')
| -rwxr-xr-x | 380/CH4/EX4.7/4_7.txt | 32 | ||||
| -rwxr-xr-x | 380/CH4/EX4.7/4_7_R.txt | 15 | ||||
| -rwxr-xr-x | 380/CH4/EX4.7/Ex4_7.sce | 32 |
3 files changed, 79 insertions, 0 deletions
diff --git a/380/CH4/EX4.7/4_7.txt b/380/CH4/EX4.7/4_7.txt new file mode 100755 index 000000000..21e68e367 --- /dev/null +++ b/380/CH4/EX4.7/4_7.txt @@ -0,0 +1,32 @@ +//Caption:Find (a)KVA rating at max efficiency (b)max efficiency (c) Efficiency at full load and 0.8pf lagging (d)equivalent core resistance
+//Exa:4.7
+clc;
+clear;
+close;
+S=120000;//Volt-Ampere
+V_p=2400;//in volts
+V_s=240;//in volts
+R_1=0.75;//in ohms
+R_2=0.01;//in ohms
+X_1=0.8;//in ohms
+X_2=0.02;//in ohms
+pf=0.8;//lagging
+theta=-acosd(pf);
+a=V_p/V_s;//transformation ratio
+I_p=S/V_p;//rated load current (in Amperes)
+I_p_eta=0.7*I_p;//load current at max efficiency
+KVA=I_p_eta*V_p/1000;
+disp(KVA,'(a) KVA rating at max efficiency =');
+P_cu_eta=I_p_eta^2*(R_1+a^2*R_2);//copper loss (in Watts)
+P_m=P_cu_eta;//core loss
+P_o=V_p*I_p_eta*pf;//power output at max efficiency
+P_in=P_o+P_m+P_cu_eta;//power input at max efficiency
+eta=P_o/P_in;
+disp(eta*100,'(b) max efficiency (%)=');
+P_o_FL=V_p*I_p*pf;//power output at full load
+P_cu_FL=I_p^2*(R_1+a^2*R_2);//copper loss at full load
+P_in_FL=P_cu_FL+P_o_FL+P_m;
+Eff=P_o_FL/P_in_FL;
+disp(Eff*100,'(c) Efficiency at full load (%)=');
+R_c1=V_p^2/P_cu_eta;
+disp(R_c1,'(d) equivalent core resistance (in ohms)=');
\ No newline at end of file diff --git a/380/CH4/EX4.7/4_7_R.txt b/380/CH4/EX4.7/4_7_R.txt new file mode 100755 index 000000000..fc5017d56 --- /dev/null +++ b/380/CH4/EX4.7/4_7_R.txt @@ -0,0 +1,15 @@ + (a) KVA rating at max efficiency =
+
+ 84.
+
+ (b) max efficiency (%)=
+
+ 94.002448
+
+ (c) Efficiency at full load (%)=
+
+ 93.641407
+
+ (d) equivalent core resistance (in ohms)=
+
+ 2686.8805
\ No newline at end of file diff --git a/380/CH4/EX4.7/Ex4_7.sce b/380/CH4/EX4.7/Ex4_7.sce new file mode 100755 index 000000000..21e68e367 --- /dev/null +++ b/380/CH4/EX4.7/Ex4_7.sce @@ -0,0 +1,32 @@ +//Caption:Find (a)KVA rating at max efficiency (b)max efficiency (c) Efficiency at full load and 0.8pf lagging (d)equivalent core resistance
+//Exa:4.7
+clc;
+clear;
+close;
+S=120000;//Volt-Ampere
+V_p=2400;//in volts
+V_s=240;//in volts
+R_1=0.75;//in ohms
+R_2=0.01;//in ohms
+X_1=0.8;//in ohms
+X_2=0.02;//in ohms
+pf=0.8;//lagging
+theta=-acosd(pf);
+a=V_p/V_s;//transformation ratio
+I_p=S/V_p;//rated load current (in Amperes)
+I_p_eta=0.7*I_p;//load current at max efficiency
+KVA=I_p_eta*V_p/1000;
+disp(KVA,'(a) KVA rating at max efficiency =');
+P_cu_eta=I_p_eta^2*(R_1+a^2*R_2);//copper loss (in Watts)
+P_m=P_cu_eta;//core loss
+P_o=V_p*I_p_eta*pf;//power output at max efficiency
+P_in=P_o+P_m+P_cu_eta;//power input at max efficiency
+eta=P_o/P_in;
+disp(eta*100,'(b) max efficiency (%)=');
+P_o_FL=V_p*I_p*pf;//power output at full load
+P_cu_FL=I_p^2*(R_1+a^2*R_2);//copper loss at full load
+P_in_FL=P_cu_FL+P_o_FL+P_m;
+Eff=P_o_FL/P_in_FL;
+disp(Eff*100,'(c) Efficiency at full load (%)=');
+R_c1=V_p^2/P_cu_eta;
+disp(R_c1,'(d) equivalent core resistance (in ohms)=');
\ No newline at end of file |