Switching-Table-Based Direct Torque Control of Dual Three-Phase PMSMs With Closed-Loop Current Harmonics Compensation

In this article, the new closed-loop current harmonics compensation strategy is introduced in switching-table-based direct torque control (ST-DTC) of dual three-phase permanent magnet synchronous machines. The harmonic distortion major problem ST-DTC multiphase machines and typically caused by lack auxiliary x-y subspace under vector space decomposition model. synthetic vectors to obtain average zero voltage can be a solution. However, cannot compensate for harmonics; example, due dead-time back-electromotive force distortion, which also mapped into subspace. Therefore, references are obtained closed loop that controls currents zero. To modulate nonzero reference, modulation approach employing groups together with switching table developed incorporated ST-DTC. Meanwhile, analysis two available sets 12 illustrates tradeoff between linear range dc-link utilization rate. Finally, effectiveness proposed verified through experiments simulation.