Treffer: 永磁同步电机全速域鲁棒模型 预测电流控制.

In order to solve the problems that the speed regulation range of the PMSM model predictive control is limited by the supply side of the inverter DC bus voltage, and that the control performance degrades due to the change of motor parameters during operation, a robust model predictive current control strategy in the full speed domain of the PMSM was proposed. First, the model predictive control system of permanent magnet synchronous motor was established based on the motor mathematical model, the operation range of the full speed domain was divided into the base speed region and the weak magnetic region, and the current limit circle and voltage limit circle were set according to the analysis results. Second, the utilization ratio of the motor terminal voltage to the DC bus voltage and the stator current vector offset angle was calculated to determine the operating range of the current motor speed. MTPA control was applied below the base speed zone, and the leading angle weak magnetic control was applied above the base speed zone. Third, the parameter sensitivity of the prediction model was analyzed, and the inductance and resistance of the stator were identified online by an extended Kalman filter, and the identified values were substituted back into the prediction equation in real time, the integral error cost term was used to eliminate the current steady-state error, and a PI type cost function was constructed by combining the given tracking cost function as the proportional error cost term. Finally, a hardware-in-the-loop simulation platform was built to validate the feasibility of the proposed control strategy. The results show that, compared with model predictive control, the proposed control strategy effectively broadens the operating speed range of the motor while maintaining the superior dynamic performance of model predictive control, reduces the dependence of the control system on motor parameters, significantly reduces the steady-state error caused by motor parameter mismatch, and improves the robustness of the control system. The research results provide a reference for further realizing wide-speed-range and high-efficiency permanent magnet synchronous motor control. [ABSTRACT FROM AUTHOR]

为解决永磁同步电机模型预测控制受逆变器直流母线电压供给侧限制导致调速范围有限, 运行过程中电机参数发 生变化引起控制性能下降的问题, 提出永磁同步电机全速域鲁棒模型预测电流控制策略。首先, 基于电机数学模型建立永 磁同步电机模型预测控制系统, 将全速域运行范围划分为基速区与弱磁区, 依据分析结果设定电流极限圆与电压极限圆等 约束条件; 其次, 计算电机端电压对于直流母线电压的利用率与定子电流矢量偏移角度, 判断电机当前速度所在的运行范 围, 在基速区以下采用 MTPA 控制, 基速区以上采用超前角弱磁控制; 再次, 对预测模型参数敏感性进行分析, 采用扩展 卡尔曼滤波器对电机定子电感与定子电阻在线辨识, 并在预测模型中实时更新, 同时使用积分误差代价项消除电流稳态误 差, 结合给定跟踪型代价函数作为比例误差代价项构建一种 PI 型代价函数; 最后, 搭建硬件在环仿真平台验证所提控制策 略可行性。结果表明: 相较于模型预测控制, 所提控制策略在维持模型预测控制动态响应快的基础上有效拓宽了电机运行 速域, 降低了控制系统对电机参数依赖, 大幅减小因电机参数失配导致的稳态误差, 提升了控制系统的鲁棒性。研究结果 为进一步实现宽速域高效率永磁同步电机控制提供参考。 [ABSTRACT FROM AUTHOR]

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