永磁伺服电机嵌入式位置检测理论及误差分析

发布时间：2018-11-21 11:46

【摘要】：针对现有的永磁伺服电机位置传感器存在成本高、体积大的缺点和新兴的无传感器技术计算复杂及依赖电机参数的不可靠性问题,提出了绕制时栅线圈检测电机转动位置的方法,但由于绕制时栅线圈检测的方法存在获取信号复杂、测量稳定性差以及线圈绕制不均匀增加误差的缺点,在此基础上,提出了一种基于隧道磁阻效应(TMR)和时栅技术的永磁伺服电机嵌入式位置检测新方法。在原理分析的基础上,根据行波表达式的理论推导,分析了单路和双路驻波幅值不相等所导致的误差规律,为检测结构的优化和进一步提高测量精度奠定基础。最后通过实验,验证了嵌入式位置检测理论分析的正确性以及检测方案的优越性,所提出方法的检测精度较绕制时栅线圈的检测方法提高了3倍,稳定性提高了5倍。
[Abstract]:The existing permanent magnet servo motor position sensor has the disadvantages of high cost, large volume, complex calculation of new sensorless technology and unreliability problem depending on the parameters of the motor. In this paper, a method for detecting the rotating position of the motor is proposed. However, because of the complexity of signal acquisition, the poor stability of measurement and the increase of error due to the nonuniformity of coil winding, the detection method of grid coil during winding has some disadvantages, such as the complexity of signal acquisition, the poor stability of measurement and the increase of error in coil winding. A new embedded position detection method for permanent magnet servo motor based on tunneling magnetoresistive effect (TMR) and time-grid technology is proposed. Based on the theoretical analysis and the theoretical derivation of the traveling wave expression, the error law caused by the unequal amplitude of single and double standing waves is analyzed, which lays a foundation for the optimization of detection structure and the further improvement of measurement accuracy. Finally, the correctness of the embedded position detection theory and the superiority of the detection scheme are verified by experiments. The detection accuracy of the proposed method is three times higher than that of the grid-coil detection method, and the stability is improved by five times.
【作者单位】：合肥工业大学仪器科学与光电工程学院;重庆理工大学机械检测技术与装备教育部工程研究中心时栅传感及先进检测技术重庆市重点实验室;
【基金】：国家自然科学基金(51475063,61503051) 重庆市教委科学技术研究(KJ1600904) 重庆市高校创新团队建设计划(CXTDX201601029)项目资助
【分类号】：TM383.4

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