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// A Texbook on POWER SYSTEM ENGINEERING
// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
// DHANPAT RAI & Co.
// SECOND EDITION
// PART IV : UTILIZATION AND TRACTION
// CHAPTER 1: INDUSTRIAL APPLICATIONS OF ELECTRIC MOTORS
// EXAMPLE : 1.29 :
// Page number 710
clear ; clc ; close ; // Clear the work space and console
// Given data
hp = 50.0 // Motor rating(hp)
N = 600.0 // Speed(rpm)
energy = 276.0 // Stored energy(kg-m/hp)
// Calculations
g = 9.81
T = hp*746*60/(2*%pi*N*g) // Full load torque of motor(kg-m)
J = hp*energy*2*g/(2*%pi*N/60)**2 // Moment of inertia(kg-m^2)
alpha = T*g/J // Angular acceleration(rad/sec^2)
t = 2*%pi*N/(60*alpha) // Time taken to accelerate the motor to rated speed(sec)
// Results
disp("PART IV - EXAMPLE : 1.29 : SOLUTION :-")
printf("\nTime taken to accelerate the motor to rated speed, t = %.2f sec", t)
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