Accurate knowledge of induction machine parameters has a direct impact on the overall performance of field-oriented control strategies. In the case of rotor flux oriented control, parameter mismatch causes a discrepancy in the estimated rotor flux position and amplitude. Magnetising inductance is one of the parameters whose detuning has a direct impact on the setpoints of the control loops and estimation of hardly or non-measurable quantities. Conventional iron saturation, which can be obtained by a standard no-load test, is not the only type of saturation occurring in the machine. Depending on the rotor design, the magnetising inductance and the rotor leakage inductance may also strongly saturate as a function of load and, thus, rotor current. Based on the authors’ previous work, a new, improved experimental method for identifying the load-dependent saturation of induction motor, which takes into account variation of the inverse rotor time constant, is proposed. Experimental results conducted on 12 kW motor show improved static and dynamic behaviour of the drive compared to the constant parameter model.

中文翻译：

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考虑逆转子时间常数变化的离线识别异步电动机负载相关饱和的实验方法

感应电机参数的准确知识直接影响磁场定向控制策略的整体性能。在以转子磁通为导向的控制中，参数不匹配会导致估算出的转子磁通位置和振幅出现差异。励磁电感是其中的失谐参数之一，其失谐直接影响控制回路的设定点以及估算几乎或不可测量的数量。可以通过标准的空载测试获得的常规铁饱和并不是机器中发生的唯一饱和类型。取决于转子的设计，磁化电感和转子泄漏电感也可能根据负载以及转子电流而强烈饱和。根据作者先前的工作，提出了一种改进的实验方法，该方法考虑了逆转子时间常数的变化，从而确定了感应电动机的负载相关的饱和度。在12 kW电动机上进行的实验结果表明，与恒定参数模型相比，该驱动器具有更好的静态和动态性能。