diff options
Diffstat (limited to '3760/CH4/EX4.64')
| -rw-r--r-- | 3760/CH4/EX4.64/Ex4_64.sce | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/3760/CH4/EX4.64/Ex4_64.sce b/3760/CH4/EX4.64/Ex4_64.sce new file mode 100644 index 000000000..8db1039f5 --- /dev/null +++ b/3760/CH4/EX4.64/Ex4_64.sce @@ -0,0 +1,16 @@ +clc;
+v=450; // supply voltage
+i=25; // current drawn from supply
+n=600; // full load speed
+z=500; // number of conductors
+f=1.7*10^-2*sqrt(i); // flux per pole
+p=4; // number of poles
+a=p; // number of parallel paths for wave wound winding is same as number of poles
+Ea1=(f*n*z*p)/(60*a); // counter EMF
+ra=(v-Ea1)/i; // armature resistance
+// T=k*f*ia where f is flux and ia is armature current As per question new torque is half of initial torque
+i2=((i^1.5)/2)^(1/1.5); // new armature current
+Ea2=(v/2)-i2*ra; // counter EMF for new armature current
+n2=(Ea2*f*sqrt(i)*n)/(Ea1*f*sqrt(i2));
+printf('New speed at which motor will run is %f rpm',floor(n2));
+
|