考虑铁损的同步磁阻电机最小损耗控制策略

Minimum losses control strategy of synchronous reluctance motors considering iron losses

传统电机模型忽略了转子铁损影响,导致电机在高速运行状态下最大转矩电流比控制(MTPA)效果变差,因此提出了一种考虑转子铁心损耗的同步磁阻电机(SynRMs)模型以及相应基于模型的控制策略。提出的电机模型从能量的角度出发,将产生于铁心上的各类损耗统一等效为一个铁损电阻的发热损耗,兼具了建模的准确性及简洁性。在此基础上,通过对电机运行时产生总损耗进行更为精确的数学分析,提出了考虑铁损的同步磁阻电机最小损耗(ML)控制策略。通过控制输入电流合理分配使稳定运行状态下电机损耗保持在最低,有效提升了运行效率。此外,所提出控制策略可有效降低控制器的计算量。最后,通过仿真和实验结果验证了所提出控制策略的可行性及有效性。

To deal with the problem that the traditional motor model ignores the influence of rotor iron los-ses,which leads to the low performance of the maximum torque per ampere(MTPA)control at high-speed operation state,a synchronous reluctance motors(SynRMs)model considering the iron losses and corresponding model-based control strategies was proposed.From the perspective of energy,the various losses generated on the iron core are equated to the heating loss of a core loss resistor which combines the accuracy and simplicity of modeling.Through accurate mathematical analysis of the total losses generated during the operation state of the motor,the minimum losses(ML)control strategy of SynRMs considering the iron losses was proposed.The strategy keeps the motor operation losses to the minimum,and im-proves the operation efficiency effectively by distributing the input current reasonably.In addition,the proposed control strategy can reduce the computational complexity of the controller effectively.Simulation and experimental results verify feasibility and effectiveness of the proposed control strategy.