Optimal Switching in a Six-Phase Converter of a Permanent Magnet Synchronous Machine to Reduce Current Harmonic Distortion Using a Modified Current Predictive Control Method
Subject Areas : electrical and computer engineering
Peyman Mirzaeipour
1
,
Syed Qudrat Allah seifosadat
2
,
Mohsen Saniei
3
,
S. S. Mortazavi
4
1 - Electrical Research Department, Faculty of Engineering, Shahid Chamran University, Ahvaz, Iran
2 - Shahid Chamran University of Ahvaz
3 - Shahid Chamran University of ahvaz
4 -
Keywords: Six-phase permanent magnet synchronous machines (PMSM), modified predictive current control (PCC), virtual voltage vectors, optimal switching, cost function minimization.,
Abstract :
This paper proposes a modified predictive current control (PCC) method based on optimal virtual voltage vectors (VV-PCC) with simultaneous control and regulation of two subspaces in a six-phase converter for permanent magnet synchronous machines (PMSM). This method leads to minimizing harmonic distortion of the current compared to other methods. In addition, it is possible to control the operation of a six-phase PMSM with an unbalanced current between two sets of windings. Finally, the dual subspace PCC method (BS-PCC) based on virtual vectors with optimal amplitude is adopted, which, by selecting an appropriate switching pattern, can both reduce the amount of unwanted harmonics and provide fast dynamic response and acceptable torque response. Also, since the selection of modes in the PCC can lead to harmonic Circulating current in the machine windings; This problem can be solved by the proposed method by minimizing the weighting factor, which requires a small number of iterations in switching the six-phase converter. The validation of the article was carried out using MATLAB software on a prototype machine.
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