Abstract
Dual three-phase (DTP) permanent magnet synchronous motors (PMSMs) are specialized machines which are commonly used for high power density applications. These machines offer the merits of high efficiency, high torque density, and superior supervisor fault tolerant capability compared to conventional three-phase AC-machines. However, the electrical structure of such machines is very complicated, and as such, control becomes challenging. In conventional vector controlled DTP-PMSMs drives, the components of the dq-subspace are associated with electromechanical energy conversion, and two currents, i.e., Id and Iq belonging to this subspace, are used in feedback-loops for control. Such orthodox control methods can cause some anomalies e.g., the voltage source inverter’s (VSI) dead time effect and other nonlinear factors, and can induce large harmonics. These glitches can be greatly alleviated by the introduction of the two-extra current loops to directly control the currents in Z1Z2-subspace in order to suppress the insertion of harmonics. In this paper, two approaches—one with two-current loops and other with four-current loops—for vector controlled DTP-PMSMs are investigated with the aid of different MATLAB-based simulations. Furthermore, in the paper, the influence of additional current loops is quantified using simulation-based results.
Highlights
In recent years, governments across the globe have raised the issues of climate changes due to the emission of harmful gases into the atmosphere [1]
Vector-controlled dual three-phase (DTP)-permanent magnet synchronous motors (PMSMs), the problems associated with harmonics is encountered indirectly by ensuring that the average current of Z1 Z2 -subspace is zero
Conventional control for DTP-PMSMs are discussed in this paper
Summary
Governments across the globe have raised the issues of climate changes due to the emission of harmful gases into the atmosphere [1]. DTP AC-machines offer several advantages over conventional three-phase AC-machines, their complicated electrical structures can be considered as one of the disadvantages. Developing any control structure in the original the original nature frame for DTP AC-machine is almost impossible. The control topologies for DTP topologies for DTP AC-machines are usually developed in two-dimensional, stationary αβ-frames. In recent investigations by different researchers, a method to suppress the harmonic inclusion implicates the direct control of current in Z1 Z2 subspace. Two approaches of vector control for DTP-PMSMs, loops for IZ1. Two approaches of vector control for DTP-PMSMs, one with conventional two current loops and other with unorthodox four current loops, will be the one with conventional two current loops and other with unorthodox four current loops, will be the focus of this paper. Performance for both approaches with the help of simulation-based results are the subject of Section 4; Section 5 concludes this paper
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