blob: 058e709094bbd3ad788fd7227576c0ebcc8eb878 (
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
25
26
|
clc
// Variable Initialization
Vm=230 //Supply Voltage in Volts
R=0.25//Combined Field and Armature circuit resistance in Ohm
N=1000 //Motor speed in Rpm
Kaf=0.03 //Constant in N-m/A^2
Krcs=0.075 //Constant in V-S/Rad
a=30 //firing angle in Degree
//Solution
//For a full converter controlled dc motor drive
W=(2*%pi*N)/60 //Angular speed in Rad/sec
Ia=((((2*Vm*1.414)/%pi)*cosd(a))-(Krcs*W))/(R+(Kaf*W)) //Armature current in Amp
T=Kaf*(Ia^2) //Torque in N-m
Va=(2*Vm*1.414)*cosd(a)*(1/%pi)//Average voltage in volts
Po=Va*Ia //Output power in Watt
Irms=Ia*sqrt((180-a)/180) //Rms Current in Amp
Pi=Vm*Irms
pf=Po/Pi //Power factor
//Results
printf('\n\n The motor Current =%0.1f Amp \n\n',Ia)
printf('\n\n The motor Torque=%0.1f N-m \n\n',T)
printf('\n\n The Supply Power Factor=%0.1f Lag\n\n',pf)
//The answers vary due to round off error
|
