//Electric Drives:concepts and applications by V.subrahmanyam //Publisher:Tata McGraw-Hill //Edition:Second //Ex3_9 clc; clear; L=0.003;//Inductance in mH Id=64.9;//Current in A V=162.25;//voltage in V Vs=150;//Supply voltage in V f=50;//Frequency in Hz Rd=2.5;//Resistance in ohm Eb=-250;//Back emf in V pf=-0.5;//Powerfactor Xc=2*%pi*f*L; Vdia=(Id*(Rd+((3*Xc)/(2*%pi))))+Eb; a=Vdia/(1.17*Vs); b=acos(a); c=(b*180)/%pi; Alpha=-0.3338;//angle in radian X=(3*Id*Xc)/(%pi*Vs); d=acos(Alpha-X); e=(d*180)/%pi; u=e-c; disp(u,"The overlap angle in deg is:") //Result vary due to error in calculation of overlap angle in the textbook