Decoupled Vector Space Decomposition Based Space Vector Modulation for Dual Three-Phase Three-Level Motor Drives

作者：Wang, Zheng^*; Wang, Yibo; Chen, Jian; Hu, Yihua

来源：IEEE Transactions on Power Electronics, 2018, 33(12): 10683-10697.

DOI：10.1109/TPEL.2018.2811391

• Harmonic performance
• multilevel inverter
• multiphase motor drives
• space vector modulation (SVM)
• vector space decomposition (VSD)

In this paper, a novel space vector modulation (SVM) strategy is proposed and designed for dual three-phase three-level motor drives based on vector space decomposition (VSD), which could be applied for high-power and high-reliability applications. The key of the proposed method is to design two decoupled groups of voltage vector candidates for synthesis on alpha - beta subspace and x - y subspace, respectively. The two decoupled groups of voltage vectors will synthesize respective voltage references on alpha - beta subspace and x - y subspace, while having no impact on each other. The redundant small voltage vectors and zero-sequence voltage vectors are utilized to mitigate voltage oscillation in midpoint of dc link and suppress zero-sequence current component for dual three-phase windings with a common neutral. For comparison, another VSD-SVM strategy is designed based on traditional solution, which cannot offer closed-loop control on x - y subspace. Both simulation and experiments have been given to verify that the proposed decoupled VSD-SVM can suppress harmonic components on x - y subspace besides tracking torque components on alpha - beta subspace. Furthermore, the harmonic performance of the proposed decoupled VSD-SVM has been compared with the traditional VSD-SVM strategy and the carrier disposition based pulsewidth modulation.

• 出版日期2018-12
• 单位东南大学