18-05-2012, 01:10 PM
MODELING AND SIMULATION OF DISCONTINUOUS CURRENT MODE INVERTER FED PERMANENT MAGNET
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ABSTRACT
The aim of this project is to model a six step discontinuous current mode inverter fed to a PermanentMagnet Synchronous Motor (PMSM) drive using MATLAB/SIMULINK. The dq-axis Voltage-Current andTorque relation in terms of machine parameters are used along with a six step 120 degree mode inverterand gate drive using MATLAB/SIMULINK. There is also a provision for easy changes to the machineparameters and gate drive inverter parameters at appropriate places. The various subsystems allow us tochange the parameters like power supply data, phase angle advance, PMSM parameters such as statorresistance, inductance, number of poles.
INTRODUCTION
THE Permanent Magnet Synchronous motor
(PMSM) is a rotating electric machine where the
stator is a classic three phase stator like that of an
induction motor and the rotor has surface-mounted
permanent magnets. In this respect, the Permanent
Magnet Synchronous motor is equivalent to an
induction motor where the air gap magnetic field is
produced by a permanent magnet. The use of a
permanent magnet to generate a substantial air gap
magnetic flux makes it possible to design highly
efficient PM motors.
Model of a PMSM
A dynamic model of the PMSM is required to
derive the vector control algorithm to decouple the
air gap-flux and torque channels in the drive
system. The derivation of the dynamic model is
easily made from the dynamic model of the
induction machine in flux linkages.
SIMULATION RESULTS
Current mode inverter fed PMSM simulation
was carried out using Simulink 6, using ode15s
(stiff/NDF) solver and the simulation time.
as 6 seconds.