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

Electronics

Ke Lu¹  Weisong Gu¹  Yuan Zhu¹  Zhihong Wu¹ 

[1] School of Automotive Studies, Tongji University, Shanghai 201800, China;

关键词: asymmetric six-phase permanent magnet synchronous motor;    vector space decomposition;    state observer;    adaptive-linear-neuron (adaline)-based control algorithm;    pulse width modulation;   

DOI  :  10.3390/electronics9010172

来源: DOAJ

【 摘 要 】

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 α−β currents in α−β 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 α−β 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 x−y 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.

【 授权许可】

Unknown