From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001 From: prashantsinalkar Date: Tue, 10 Oct 2017 12:27:19 +0530 Subject: initial commit / add all books --- 3681/CH9/EX9.27/Ans9_27.PNG | Bin 0 -> 8485 bytes 3681/CH9/EX9.27/Ex9_27.sce | 15 +++++++++++++++ 2 files changed, 15 insertions(+) create mode 100644 3681/CH9/EX9.27/Ans9_27.PNG create mode 100644 3681/CH9/EX9.27/Ex9_27.sce (limited to '3681/CH9/EX9.27') diff --git a/3681/CH9/EX9.27/Ans9_27.PNG b/3681/CH9/EX9.27/Ans9_27.PNG new file mode 100644 index 000000000..561ca6b7b Binary files /dev/null and b/3681/CH9/EX9.27/Ans9_27.PNG differ diff --git a/3681/CH9/EX9.27/Ex9_27.sce b/3681/CH9/EX9.27/Ex9_27.sce new file mode 100644 index 000000000..ecdb0aa81 --- /dev/null +++ b/3681/CH9/EX9.27/Ex9_27.sce @@ -0,0 +1,15 @@ +// Calculating the reactance voltage for a machine with straight line and sinusoidal commutation +clc; +disp('Example 9.27, Page No. = 9.86') +// Given Data +Ns = 60;// Number of segments +rev = 10;// Number of revolution per second +W = 1.5;// Brush width in segments +L = 0.2;// Co-efficient of self-induction (in mH) +I = 20;// Current per coil +// Calculation of the reactance voltage for a machine with straight line and sinusoidal commutation +Tc = W/(Ns*rev);// Time of commutation +Erav = L*10^(-3)*2*I/Tc;// Average reactance voltage +disp(Erav,'Reactance voltage with straight line commutation (Volts)='); +disp(%pi/2*Erav,'Reactance voltage with sinusoidal commutation (Volts)='); +//in book answers are 3.2 Volts and 5 Volts respectively. The answers vary due to round off error -- cgit