English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

High harmonic contents of the stator currents due to uncontrolled   $x-y$   subspace dramatically overshadow the performance of the switching-table-based direct torque control (ST-DTC) strategy for multiphase drives. The concept of ST-DTC based on virtual voltage vectors (VVs) has been frequently developed to alleviate this problem. However, VVs with fixed duty ratios are incapable of compensating inherent machine/converter asymmetries and dead time harmonics, which are mapped into the   $x-y$   subspace. To solve this problem, this article develops a dynamic duty-ratio-based DTC technique for six-phase induction machine drives, where the duty ratios of the selected VVs are not constant anymore. These duty ratios are updated based on the   $x-y$   voltage commands arising from the closed-loop   $x-y$   current controllers over every sampling period. The attained merits over and above the conventional fixed duty-ratio-based DTC schemes include effective   $x-y$   current cancellation without increase in average switching frequency and decrease in dc-link utilization. Experimental results are presented to validate the effectiveness of the proposed control technique.

Switching-Table-Based Direct Torque Control of Six-Phase Drives With $x-y$ Current Regulation