一种永磁同步电机定子磁链和电磁转矩观测器

发布时间：2018-03-09 23:03

本文选题：永磁同步电机　切入点：磁链观测器　出处：《电力系统自动化》2014年16期 　论文类型：期刊论文

【摘要】：在风力发电系统中,风力发电机需要根据主控系统的转矩指令进行精确的转矩控制。传统的控制方法直接根据转矩指令计算对应的电流指令,并进行电流闭环控制。然而,根据转矩指令计算电流指令时,由于电机参数的影响,导致转矩控制精度降低。因此,文中基于全阶滑模观测器,提出了一种永磁同步电机定子磁链和电磁转矩观测器。与传统的电压模型磁链观测器相比,所提磁链观测器克服了积分初始值和积分漂移的问题。与传统电流模型磁链观测器相比,所提磁链观测器克服了电机电感参数和永磁体磁链参数的影响。基于观测得到的定子磁链,可实现电磁转矩的精确观测。通过设计转矩闭环控制,大大提高了转矩控制精度。仿真和实验结果验证了该方法的有效性。
[Abstract]:In the wind power system, the wind turbine needs accurate torque control according to the torque instruction of the main control system. The traditional control method calculates the corresponding current instruction directly according to the torque instruction, and carries on the current closed loop control. When the current instruction is calculated according to the torque instruction, the torque control precision is reduced because of the influence of motor parameters. Therefore, based on the full-order sliding mode observer, A stator flux observer and an electromagnetic torque observer for permanent magnet synchronous motor (PMSM) are proposed, which are compared with the traditional voltage model flux observer. The proposed flux observer overcomes the problems of integral initial value and integral drift. The proposed flux observer overcomes the influence of inductance parameters and permanent magnet flux parameters. Based on the stator flux flux obtained by observation, the precise observation of electromagnetic torque can be realized. Through the design of torque closed-loop control, The accuracy of torque control is greatly improved and the effectiveness of the method is verified by simulation and experimental results.
【作者单位】：合肥工业大学电气与自动化工程学院;铜陵学院电气工程学院;
【基金】：国家自然科学基金资助项目(51377040)~~
【分类号】：TM341

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