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Fault-tolerant stator flux oriented decoupling control for dual three-phase permanent magnet motor without diagnosis and reconfiguration

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Science China(Technological Sciences) 2023年第11期66卷 3206-3218页

作者： HUANG LinSen ZHAO WenXiang TAO Tao CUI Jia ZHANG Qiang School of Electrical and Information Engineering National Center for International Research on Structural Health Management of Critical ComponentsJiangsu UniversityZhenjiang 212013China

In this paper,the fault-tolerant capability of the existing stator-flux-oriented decoupling control(SFOC)for the DTP-PM motor is investigated,and a simple fault-tolerant SFOC is further designed to enhance fault tolerance.Firstly,the mathematical model of the DTP-PM motor in the stator-flux-oriented rotating coordinate system is analyzed.An SFOC is proposed to guarantee healthy operation performance,considering torque,flux linkage,and harmonic currents.Secondly,the coupling relationship under open-phase conditions is assessed.The assessed result shows that the coupling relationship between the harmonic and fundamental components results in conflicts and poor post-fault operation.Thirdly,the proposed SFOC includes an automatic deactivation module to detect conflicts with a variable threshold.The conflicted harmonic current controllers can be excluded automatically.Hence,fault-tolerant control can be remedied without diagnosing the specific fault scenario,and excellent faulttolerant capability can be achieved.Finally,experiments on a DTP-PM motor are carried out to verify the feasibility and effectiveness of the proposed strategy.

关键词： dual three-phase motor stator flux orientation decoupling control fault-tolerant control open-phase fault

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Model Predictive Torque Control for a dual three-phase PMSM Using Modified dual Virtual Vector Modulation Method

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Chinese Journal of Electrical Engineering 2022年第4期8卷 91-103页

作者： Zhujin Ren Jinghua Ji Hongyu Tang Tao Tao Linsen Huang Wenxiang Zhao School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China School of Electrical and Information Zhenjiang CollegeZhenjiang 212028China

Single voltage vectors applied in the conventional model predictive torque control(MPTC)for multiphase motors do not only suffer from serious torque and stator flux ripples but also cause the large harmonic current.To address the aforementioned challenges,an MPTC using a modified dual virtual vector modulation method is proposed to improve the operational performance of a dual three-phase permanent magnet synchronous motor.Virtual voltage vectors are synthesized as the candidate control set to restrain the harmonic current.A transformation method is introduced to consider both the stator flux and torque in the duty cycle modulation.The torque and stator flux ripples are simultaneously reduced by addressing the limitations of nonuniform units.Furthermore,the null voltage vector is then inserted to expand the modulation range and improve the steady-state performance.Moreover,the sawtooth carrier is adopted to address the challenge of the asymmetric switch sequence caused by the modified modulation.Finally,the experimental results are presented to verify the effectiveness and superiority of the proposed MPTC method.

关键词： Model predictive torque control dual three-phase motor permanent magnet synchronous motor dual virtual vector modulation

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