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Stator Flux-Based Field-Oriented Position-Sensorless Control of Permanent Magnet Synchronous Motors With Limited Parameter Knowledge

机译:有限参数知识的基于定子磁通的永磁同步电动机无位置传感器磁场定向控制

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Permanent magnet synchronous motors (PMSMs) are traditionally operated in the field-oriented control (FOC) framework based on rotor-fixed coordinates. To set up a proper torque control in this framework, numerous motor parameters are required (e.g. inductance matrix) and, therefore, engineering effort is needed to extract the parameter values from experimental testing or finite element analysis. Moreover, the torque plant model becomes coupled and nonlinear. While the effort to handle these issues is usually acceptable in premium drives (e.g. in electrical vehicles), low-cost applications require control approaches with minimum commissioning complexity. To achieve that objective, this contribution proposes a very simple stator flux-oriented FOC framework requiring only limited parameter knowledge. As a positive side-effect, the proposed framework is operating inherently position-sensorlessly. Experimental tests in the constant torque and flux weakening area proof the principle functionality of the proposed method, but also limitations are highlighted (e.g. decreased torque accuracy). The found results motivate further investigations in this field.
机译:传统上,永磁同步电动机(PMSM)在基于转子固定坐标的磁场定向控制(FOC)框架中运行。为了在此框架中设置适当的转矩控制,需要许多电动机参数(例如电感矩阵),因此需要进行工程设计以从实验测试或有限元分析中提取参数值。而且,扭矩装置模型变得耦合且非线性。虽然在高级驱动器中(例如在电动汽车中)通常可以接受解决这些问题的努力,但低成本应用程序需要具有最小调试复杂性的控制方法。为了实现该目标,此建议提出了一个非常简单的面向定子磁通的FOC框架,该框架仅需要有限的参数知识。作为积极的副作用,提出的框架本质上是无位置传感器操作的。在恒定转矩和磁通弱化区域的实验测试证明了所提出方法的基本功能,但也突出了局限性(例如降低了转矩精度)。发现的结果激发了对该领域的进一步研究。

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