Post on 16-Nov-2014
description
SIMULATION OF INDUCTION MOTOR USING MATLAB/SIMULINKThere is seldom need to simulate an IM in arbitrary reference frame. For power system studies, induction machine loads along with other types of power system components are often simulated on a systems synchronously rotating reference frame. But, for transient studies of adjustable speed drives, it is usually more convenient to simulate the induction machine and its converter on a stationary reference frame. The simulation of Induction Motor in the synchronously revolving frame has been developed. Inorder to obtain the stationary reference frame circuit, the value of e has been set to zero.
Schematic of modelling of induction motor
EQUATIONS1s vqd 0
2 3
0 1 2
1 2 3 2 1 2
1 2 3 2 1 2
vas vbs vcs
e vqs e vds
cos e sin ee F ds b e F ds b e b r
sin e cos e
s vqs s vds
dFqs dt dFds dt dFqr dt dFdr dt
b vqs
Rs Fmq xls Rs Fmd xls Fdr Fdr
Fqs Fds Fqr Fdr
b vds
b vqr
Rr Fmq xlr Rr Fmq xlrFqr xlr Fdr xlr
b vdr
e b
r
Fmq Fmd iqs ids iqr idr
* xml * xml
Fqs xls Fds xls Fmq
Fqs Fds Fqr Fdr
xls Fmd xls Fmq xlr Fmd xlr
All the currents found above are in synchronously rotating reference frame Converting to stationary frames iqs s ids
cos e sin e
sin e cos e
e iqs e ids
Equivalent circuit representation of IM in synchronous rotating frame
Equivalent circuit representation of IM in stationary rotating frame