blob: 5b7f75468318864dc92bbaca2b79bf2f8bdeda81 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
//Book name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
//chapter 4
//example 4.1
//edition 1
//publisher and place:Nelson Engineering
clc;
clear;
m=5000; //mass of the electric bus in kg
d=1; //diameter of the wheel in m
r=d/2; //radius of the wheel in m
v=50; //speed of the bus going to uphill in kg/hr
a=30; //slope of the hill in degree
u=0.4; //friction coefficient
g=9.8; //gravitational acceleration
Fg=m*g; //gravitational force in newton(N)
F=Fg*cosd(a); //normal force in newton(N)
Fl=Fg*sind(a); //load pulling force in newton (N)
Fr=u*F; //friction force in newton(N)
Fm=Fl+Fr; //total force seen by motor in newton(N)
Tm=Fm*r; //Torque seen by the motor in Nm
omega=v/r; //angular speed
Pm=Tm*omega; //power consumed by the motor in watt
Pm=Pm*10^-3; //power consumed by the motor in kilowatt
disp(Pm,'The power consumed by the motor in kilowatt is:')
|
