In this paper,a control scheme based on current optimization is proposed for dual three-phase permanent-magnet synchronous motor(DTP-PMSM)drive to reduce the low-frequency temperature swing.The reduction of temperatur...In this paper,a control scheme based on current optimization is proposed for dual three-phase permanent-magnet synchronous motor(DTP-PMSM)drive to reduce the low-frequency temperature swing.The reduction of temperature swing can be equivalent to reducing maximum instantaneous phase copper loss in this paper.First,a two-level optimization aiming at minimizing maximum instantaneous phase copper loss at each electrical angle is proposed.Then,the optimization is transformed to a singlelevel optimization by introducing the auxiliary variable for easy solving.Considering that singleobjective optimization trades a great total copper loss for a small reduction of maximum phase copper loss,the optimization considering both instantaneous total copper loss and maximum phase copper loss is proposed,which has the same performance of temperature swing reduction but with lower total loss.In this way,the proposed control scheme can reduce maximum junction temperature by 11%.Both simulation and experimental results are presented to prove the effectiveness and superiority of the proposed control scheme for low-frequency temperature swing reduction.展开更多
A novel double extended state observer(DESO)based on model predictive torque control(MPTC)strategy is developed for three-phase permanent magnet synchronous motor(PMSM)drive system without current sensor.In general,to...A novel double extended state observer(DESO)based on model predictive torque control(MPTC)strategy is developed for three-phase permanent magnet synchronous motor(PMSM)drive system without current sensor.In general,to achieve high-precision control,two-phase current sensors are necessary for successful implementation of MPTC.For this purpose,two ESOs are used to estimate q-axis current and stator resistance respectively,and then based on this,d-axis current is estimated.Moreover,to reduce torque and flux ripple and to improve the performance of the torque and speed,MPTC strategy is designed.The simulation results validate the feasibility and effectiveness of the proposed scheme.展开更多
针对单逆变器驱动双永磁同步电动机(PMSM)驱动系统负载不平衡失稳问题,引入加权系数km建立双PMSM的等效加权数学模型,并基于该等效模型设计双PMSM最大转矩电流比(MTPA)控制方法。该方法实现了双PMSM矢量控制系统等效模型的实时修正,包...针对单逆变器驱动双永磁同步电动机(PMSM)驱动系统负载不平衡失稳问题,引入加权系数km建立双PMSM的等效加权数学模型,并基于该等效模型设计双PMSM最大转矩电流比(MTPA)控制方法。该方法实现了双PMSM矢量控制系统等效模型的实时修正,包含定向角度、激磁电流和转矩电流。此外,无最大电流约束和电流限幅边界约束两种情况下的双PMSM最优MTPA曲线被分别讨论,同时将系统运行效率与传统id=0方法在全转速、负载范围进行对比分析。最后,基于双15 k W PMSM调速系统实验平台进行验证与分析,包括双PMSM动、稳态及运行效率等多项指标。结果表明,所提双PMSM的MTPA控制方法具有一定的理论意义和现实价值。展开更多
基金supported by the National Natural Science Foundation of China(No.62271109)。
文摘In this paper,a control scheme based on current optimization is proposed for dual three-phase permanent-magnet synchronous motor(DTP-PMSM)drive to reduce the low-frequency temperature swing.The reduction of temperature swing can be equivalent to reducing maximum instantaneous phase copper loss in this paper.First,a two-level optimization aiming at minimizing maximum instantaneous phase copper loss at each electrical angle is proposed.Then,the optimization is transformed to a singlelevel optimization by introducing the auxiliary variable for easy solving.Considering that singleobjective optimization trades a great total copper loss for a small reduction of maximum phase copper loss,the optimization considering both instantaneous total copper loss and maximum phase copper loss is proposed,which has the same performance of temperature swing reduction but with lower total loss.In this way,the proposed control scheme can reduce maximum junction temperature by 11%.Both simulation and experimental results are presented to prove the effectiveness and superiority of the proposed control scheme for low-frequency temperature swing reduction.
基金National Natural Science Foundation of China(No.61463025)Opening Foundation of Key Laboratory of Opto-technology and Intelligent Control(Lanzhou Jiaotong University),Ministry of Education(No.KFKT2018-8)
文摘A novel double extended state observer(DESO)based on model predictive torque control(MPTC)strategy is developed for three-phase permanent magnet synchronous motor(PMSM)drive system without current sensor.In general,to achieve high-precision control,two-phase current sensors are necessary for successful implementation of MPTC.For this purpose,two ESOs are used to estimate q-axis current and stator resistance respectively,and then based on this,d-axis current is estimated.Moreover,to reduce torque and flux ripple and to improve the performance of the torque and speed,MPTC strategy is designed.The simulation results validate the feasibility and effectiveness of the proposed scheme.
文摘针对单逆变器驱动双永磁同步电动机(PMSM)驱动系统负载不平衡失稳问题,引入加权系数km建立双PMSM的等效加权数学模型,并基于该等效模型设计双PMSM最大转矩电流比(MTPA)控制方法。该方法实现了双PMSM矢量控制系统等效模型的实时修正,包含定向角度、激磁电流和转矩电流。此外,无最大电流约束和电流限幅边界约束两种情况下的双PMSM最优MTPA曲线被分别讨论,同时将系统运行效率与传统id=0方法在全转速、负载范围进行对比分析。最后,基于双15 k W PMSM调速系统实验平台进行验证与分析,包括双PMSM动、稳态及运行效率等多项指标。结果表明,所提双PMSM的MTPA控制方法具有一定的理论意义和现实价值。
