永磁同步电机模型预测磁场定向控制技术

Model Predictive Field Oriented Control Technology for Permanent Magnet Synchronous Motor

针对永磁同步电机磁场定向控制(FOC)策略中PI电流控制环存在超调、交直轴电流耦合等不足,提出了一种基于模型预测以及FOC技术的模型预测磁场定向控制(MP-FOC)。MP-FOC优点在于:利用模型预测控制技术取代了传统FOC控制技术中的所有PI环,从而提高了电机的稳态以及动态性能;由于所提方案避免了PI环所带来的的不足,所以MP-FOC技术的提出不仅增加了电机转矩的控制精度,同时还增加了电机的应用场所,从而使得电机能够应用在超高精度的控制场所。最后,在逆变器馈电的电机系统进行实验验证,并与传统的磁场定向控制策略对比,结果表明,所提出的MP-FOC控制策略能够在电机控制系统中无任何PI环的前提下具有更好的稳态、动态性能以及控制精度,验证了所提方法的可行性与正确性。

For the disadvantages of the PI current control loop which has overshoot,cross-axis current coupling,and so on in the field oriented control(FOC)strategy of permanent magnet synchronous motor,a model prediction field oriented control(MP-FOC)based on model prediction and FOC technology was proposed.The advantage of MP-FOC is that it replaces the all PI loops in the traditional FOC control technology with model predictive control technology,thereby improving the steady state and dynamic performance of the motor.At the same time,because the proposed scheme avoids the shortcomings caused by the PI loop,the MP-FOC technology not only increases the control precision of the motor torque,but also increases the application location of the motor,so that the motor can be applied to control place of ultra-high precision.Finally,the experimental evaluation of the inverter-fed motor system was compared with the traditional field-oriented control(FOC)strategy.The results show that the proposed MP-FOC control strategy have better steady state,dynamic performance and control accuracy without any PI loop in the motor control system,and the feasibility and correctness of the proposed method is veriried.