基于扩张状态观测器的无速度传感器容错逆变器驱动永磁同步电机系统自抗扰模型预测转矩控制

针对三相四开关逆变器驱动永磁同步电机(PMSM)系统,基于扩张状态观测器(ESO)技术,提出了无速度传感器的自抗扰模型预测转矩控制(ADRMPTC)策略.建立了三相四开关逆变器驱动PMSM系统的数学模型;采用ESO技术构造了PMSM系统转速观测器,以实现对转速快速准确地实时估计;用自抗扰控制器(ADRC)作为系统的转速调节器,以提高系统的鲁棒性;利用模型预测转矩控制(MPTC)方法,以达到减小转矩和磁链脉动的目的.所设计基于ESO的无速度传感器ADRMPTC策略能够使三相四开关逆变器驱动的PMSM系统可靠稳定运行,达到满意的转矩和转速控制效果.与基于PI的MPTC策略相比,本文控制策略使PMSM系统不仅具有良好的动态性能,而且具有较强的抗负载干扰能力.仿真结果验证了所提方法的正确性和有效性.

Sensorless active disturbance rejection model predictive torque control using extended state observer for permanent magnet synchronous motors fed by three-phase four-switch inverter

A novel sensorless active disturbance rejection model predictive torque control (ADRMPTC) strategy isdeveloped for permanent magnet synchronous motors (PMSMs) fed by three-phase four-switch inverters, an after-faulttopologyfor a fault-tolerant three-phase six-switch inverter. Firstly the mathematical model of a PMSM fed by a three-phasefour-switch inverter is built. Secondly by the use of technique of extended state observer (ESO), a sensorless estimator isconstructed to realize rapid and accurate speed identification. Thirdly an active disturbance rejection controller (ADRC),acting as speed regulator, is designed to realize disturbance estimation and disturbance compensation for the purpose ofenhancing robustness. Finally a model predictive torque controller (MPTC) is designed in order to reduce the torque and fluxripples. The resultant ESO-based sensorless ADRMPTC strategy for PMSMs fed by an unhealthy inverter has fault-tolerantability with dynamical performance very close to the PMSMs fed by a healthy inverter. On the other hand, compared withPI-based MPTC strategy, the ADRMPTC strategy enables the PMSMs to possess better command-following characteristicsand stronger robustness in the presence of variations of reference speed and load torque. The simulation results validate thefeasibility and effectiveness of the proposed scheme.