基于滑模观测器的单绕组多相无轴承电机无位置传感器控制

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摘要针对单绕组多相无轴承电机的特点, 讨论了此类电机中悬浮平面电流对电机转子位置带来的扰动, 建立了基于滑模观测器的检测模型和控制算法, 实现了单绕组多相无轴承电机的无转子位置传感器运行。文中采用饱和函数代替开关函数, 并设计了随转速变化的低通滤波器, 取得了良好的观测效果。该方法克服了传统基于电机模型的无位置传感器控制方法对电机参数的依赖性, 抑制了由无轴承电机悬浮平面耦合带来的固有扰动, 提升了无轴承系统的鲁棒性。实验结果表明系统采用该观测器进行转子位置及速度观测后, 具有较好的静、动态性能, 验证了滑模观测器在单绕组多相无轴承驱动系统无位置传感器中应用的正确性和可行性。

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	程帅
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关键词 ：滑模观测器, 多相电机, 无轴承电机, 无位置传感器

Abstract：In this paper, the disturbance of the rotor position caused by the current of the suspension plane was discussed in a multiphase permanent magnet bearingless motor system. The detection model and the control algorithm were established based on a sliding mode observer. To ameliorate the system performance and identification accuracy, saturation function and low-pass filter with a variable cut-off frequency were designed. Comparing with conventional sensorless control algorithm based on the back electromotive force(EMF), the proposed scheme is insensitive to motor parameters, and it could inhibit the innate disturbance caused by coupling and enhance the robustness of the bearingless system. The experimental results verify the accuracy and feasibility of the proposed sensorless control scheme based on the sliding mode observer in the multi-phase bearingless motor with single set of windings.

Key words： Sliding mode observer multiphase motor bearingless motor position sensorless control

收稿日期: 2011-01-21 出版日期: 2014-03-20

PACS:

TM351

作者简介: 程帅男, 1988年生, 硕士研究生, 主要从事永磁同步电机无位置传感器控制方面的研究。姜海博男, 1987年生, 博士, 主要从事无轴承电机领域的研究。

引用本文:

程帅, 姜海博, 黄进, 康敏. 基于滑模观测器的单绕组多相无轴承电机无位置传感器控制[J]. 电工技术学报, 2012, 27(7): 71-77. Cheng Shuai, Jiang Haibo, Huang Jin, Kang Min. Position Sensorless Control Based on Sliding Mode Observer for Multiphase Bearingless Motor with Single Set of Windings. Transactions of China Electrotechnical Society, 2012, 27(7): 71-77.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I7/71

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