摘要
由于具有价格低、对机械扰动不敏感的优势,线性霍尔传感器被应用于圆筒型永磁同步直线电机动子位置检测。但线性霍尔传感器位置辨识精度会受到磁场谐波的影响而下降。为提升霍尔传感器的位置检测精度,该文在考虑机械加工误差的情况下,进行直线电机的可靠性与鲁棒性优化设计。首先,建立直线电机位置辨识精度与电机推力的解析模型,基于解析模型分析设计变量与设计指标之间的影响关系。然后,使用神经网络建立直线电机设计指标的响应曲面模型,通过不同推力系数下Pareto最优前沿得到优化设计的概率约束条件。最后,使用可靠性与鲁棒性优化设计的方法,在略微削减推力系数与磁通密度峰值的情况下,大幅降低磁场谐波含量,将电机霍尔位置的检测精度从357μm提升至109μm。
With the advantages of low cost and high robustness,linear hall sensors are utilized to detect the mover position of the tubular permanent magnet synchronous linear motor(TPMSLM).However,the position detection accuracy of linear hall sensor is affected by magnetic field harmonics.To reduce the harmonics,the TPMSLM was designed by reliability-based robust design optimization(RBRDO)considering the manufacturing tolerance.Firstly,a model of the position identification and thrust force analysis was established.The relationship between design variables and design objectives was analyzed.Then,the response surface model of design objectives was established by the neural network.The probability constraints were obtained by Pareto optimal front under different thrust coefficients.Finally,the total harmonic distortion is greatly reduced by RBRDO,while the thrust coefficient and the peak flux density are slightly reduced.And the position detection accuracy is improved from 357μm to 109μm.
作者
张春雷
张辉
叶佩青
Zhang Chunlei;Zhang Hui;Ye Peiqing(Department of Mechanical Engineering Tsinghua University,Beijing 100084,China;Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipments and Control Tsinghua University,Beijing 100084,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第10期2481-2490,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51875312)。
