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Open AccessArticle

Current Control Methods for an Asymmetric Six-Phase Permanent Magnet Synchronous Motor

School of Automotive Studies, Tongji University, Shanghai 201800, China
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Electronics 2020, 9(1), 172; https://doi.org/10.3390/electronics9010172
Received: 10 December 2019 / Revised: 13 January 2020 / Accepted: 15 January 2020 / Published: 16 January 2020
(This article belongs to the Section Systems & Control Engineering)
Via the vector space decomposition (VSD) transformation, the currents in an asymmetric six-phase permanent magnet synchronous motor (ASP_PMSM) can be decoupled into three orthogonal subspaces. Control of αβ currents in αβ subspace is important for torque regulation, while control of x-y currents in x-y subspace can suppress the harmonics due to the dead time of converters and other nonlinear factors. The zero-sequence components in O1-O2 subspace are 0 due to isolated neutral points. In αβ subspace, a state observer is constructed by introducing the error variable between the real current and the internal model current based on the internal model control method, which can improve the current control performance compared to the traditional internal model control method. In xy subspace, in order to suppress the current harmonics, an adaptive-linear-neuron (ADALINE)-based control algorithm is employed to generate the compensation voltage, which is self-tuned by minimizing the estimated current distortion through the least mean square (LMS) algorithm. The modulation technique to implement the four-dimensional current control based on the three-phase SVPWM is given. The experimental results validate the robustness and effectiveness of the proposed control method. View Full-Text
Keywords: asymmetric six-phase permanent magnet synchronous motor; vector space decomposition; state observer; adaptive-linear-neuron (ADALINE)-based control algorithm; pulse width modulation asymmetric six-phase permanent magnet synchronous motor; vector space decomposition; state observer; adaptive-linear-neuron (ADALINE)-based control algorithm; pulse width modulation
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Wu, Z.; Gu, W.; Zhu, Y.; Lu, K. Current Control Methods for an Asymmetric Six-Phase Permanent Magnet Synchronous Motor. Electronics 2020, 9, 172.

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