【摘要】 为了研究基于电机外部电信号的直驱永磁同步电机早期匝间短路故障检测及定位方法，提出一种基于探测线圈阵列的DDPMSM的ISF短路线圈定位方法。首先，提出一种基于电机绕组分布及连接方式的探测线圈阵列；其次，分析了探测线圈工作机理，建立了考虑短路线圈位置的探测线圈反电势矩阵；然后，利用所建立的探测线圈反电势矩阵，分析用于ISF短路线圈位置的故障特征量。提出了利用探测线圈反电势差值进行ISF故障检测和故障线圈组的定位，利用探测线圈反电势残差进行短路线圈的定位，提出基于上述定位特征量的ISF定位方法。仿真和实验结果验证了所提出方法的正确性和有效性。最后，以样机为例，将所提出的定位方法与现有故障定位方法进行比较，进一步证明方法的准确性和灵敏性。更多还原

【Abstract】 In order to detect and locate the inter-turn short-circuit fault(ISF) of direct-drive permanent magnet synchronous motor(DDPMSM) using external electrical signal, a fault coil location approach was proposed for DDPMSM with ISF based on the novel search coil. Firstly, the arrangement principle of the novel search coil was presented, which depends on the winding distribution and connection. Secondly, the working mechanism of the search coil was analyzed, the matrix of the back electromotive force(EMF) of the novel search coil was established considering the short-circuit coil position. Thirdly, the search coil differential back-EMF and search coil residual back EMF as fault location indicators were proposed through the developed matrix, the ISF location approach was proposed. Simulation and experimental results verify effectiveness and correctness of the proposed method. Finally, a comparative analysis of the existing fault location method shows that the proposed method is more sensitive and accurate to detect and locate the ISF in the early stage.更多还原