Finite-element analysis of electrical machines for sensorless drives with signal injection
Finite-element analysis of electrical machines for sensorless drives with signal injection
复制标题
通过信号注入对无传感器驱动电机进行有限元分析
DOI：
10.1109/ecce.2012.6342728
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Gyselinck
中科院分区：
文献类型：
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作者：
L. Alberti;N. Bianchi;M. Morandin;J. Gyselinck
电机设计过程中的一个挑战是在尽可能短的计算时间内表征各种参数。为此，分析策略多种多样。此外，更频繁地获取驱动控制所需的电机参数。本文提出了一种用于无位置传感器电气传动的电机高频信号注入响应的计算方法。它允许在设计过程中直接确定机器的自感知能力。这样的能力定义在任何给定的工作点(例如，沿着每安培轨迹的最大扭矩)。此外，获取此类数据所需的计算时间非常短。在进行静磁场分析以获得给定电流下的转矩后，存储磁通密度分布，并在网格的每个单元中计算差动磁阻。然后，对线性化结构进行时谐分析，计算出注入频率下的d-q参数。将该方法应用于不同类型的机床，并与实验结果进行了比较，验证了该方法的有效性。
A challenge during the design process of an electrical machine is the characterization of the various parameters in a computational time as short as possible. To this purpose, the analysis strategies are manifold. In addition, it is more frequent to obtain parameters of the electrical machine that are necessary for the drive control. In this paper, a strategy to compute the high-frequency signal injection response of an electrical machine adopted in a sensorless electric drive is presented. It allows to determine the self-sensing capability of the machine directly during the design process. Such a capability is defined in any given operating points (for instance along the maximum torque per Amps trajectory). In addition, the computational time required to get such data is very short. After a magnetostatic field analysis, carried out so as to get the torque for a given current, the flux density distribution is stored and the differential reluctivity is evaluated in each element of the mesh. Then, a time-harmonic analysis is carried out in a linearized structure so as to compute the d-q parameters at the injection frequency. The proposed procedure is applied to different type of machines and validated by comparison with experimental results.