基于迭代法的内置式永磁同步电机最大转矩/电流控制

The Maxium Torque Per Ampere Control of Permanent Magnet Synchronous Motor Based on Iterative Method

最大转矩/电流控制(MTPA)可以充分利用内置式永磁电机(IPMSM)的磁阻转矩,但是运算量大,控制复杂。针对这一问题,本文运用迭代法得到了电磁转矩与电流分量的曲线关系,并用三个二次函数对其进行分段拟合。用拟合所得的近似曲线替代传统查表法中大量的离散点数据,提高了系统的动态性能。最后通过仿真实验对两种方法的动态性能进行对比,其结果验证了本文提出方法的有效性和优越性。

The maximun torque per ampere control can take use of the relactance torque of interior permanent magnet scychronous motor.But the lots of computation is brought by this control strategy.So it is not realized easily.In this paper,the iterative method is used to getting the curve of relationship between the electromagnetic torque and the current component.Then three 2-functions are applicated to analoging the relationship curve.Insteading of discrete spots of traditional method of look up table,these approximate curves which are obtained by above threes 2-functions are employed into MTPA.Then the dynamic performance of the system can be enhanced.At last,the dynamic performance of the two method are compared by simulation and experiment.The results approv the effectiveness and advantage of this proposed strategy.