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Discrete Space Vector Modulation Applied on a PMSM Motor
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| Author(s) |
David Ocen, Luis Romeral, Juan Antonio Ortega, Jordi Cusido, Antoni Garcia |
| Abstract |
The Permanent Magnet Synchronous Motors
(PMSM) are extensively used in high-performance
industrial applications. The electromagnetic torque in a
PMSM is proportional to the angle between the stator and
rotor flux linkages. Therefore, high dynamic response can
be achieved by means of Direct Torque Control (DTC).
However, because the rotor flux linkage is fixed on the rotor
of PMSM, high torque ripple is produced when making use
of full voltage vectors in classical DTC.
The paper presents an improved PMSM DTC scheme by
using a simplified space vector modulation technique, which
addresses the problem by introducing a higher number of
predefined voltage space vectors. The voltage vectors are
tabulated in more precise switch tables which also take the
emf induced in the stator windings into account. While still
using switch tables to maintain the simplicity of the classical
DTC scheme, the torque ripple results significantly
decreased. Theoretical development and simulation results
from the classical and improved DTC are presented and
compared to support the research. Results show that the
torque, flux linkage and stator current ripple are
significantly decreased with the improved DTC. |
| Download |
| Filename: | T5-117.pdf |
| Filesize: | 312.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-13 by System |
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