共查询到17条相似文献,搜索用时 93 毫秒
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分析了交流伺服驱动系统中旋转变压器的工作原理,介绍了旋转变压器位置解析在数字信号处理器(DSP)平台上的应用,详细描述了系统的实现流程和方法。通过试验,证明了旋转变压器位置解析系统具有速度快和精度高的特点。 相似文献
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《电工技术学报》2016,(Z2)
针对以旋转变压器为位置传感器的电动汽车永磁同步电机(PMSM)驱动系统,重点开展旋转变压器正交不完善和幅值不平衡位置传感器故障在线诊断与自适应容错控制研究。首先分析旋转变压器幅值不平衡与正交不完善故障所导致的位置偏差及在d、q轴定子电流中所呈现的故障特征,提出基于定子q轴电流故障特征的有效提取,通过故障模式定位、识别和故障程度评估实现位置传感器故障的在线诊断,巧妙地回避逆变器死区效应引起的q轴电流脉动对位置传感器故障诊断精度的影响,再基于获取的位置偏差实现自适应容错控制。最后,通过系统建模与仿真研究、系统实验测试证实所提出的位置传感器故障在线诊断与自适应故障容错策略的合理有效性。 相似文献
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高精度步进电机角度位置跟踪系统设计 总被引:5,自引:0,他引:5
文章介绍了一种基于高细分驱动模块,用于角度位置跟踪的步进电机闭环控制系统。脉冲控制部分采用了400细分的微步运行方式使步距角仅为0.27’,提高了步进电机的控制精度;位置反馈部分测量元件选用多极双通道旋转变压器,采用粗精组合的21位测角信号使该角度跟踪系统的精度很高。 相似文献
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In most variable‐speed drives of PMSM, some type of shaft sensor such as an optical encoder or resolver is connected to the rotor shaft. However, such sensor presents several disadvantages such as drive cost, machine size, reliability, and noise immunity. Therefore, the sensorless control of PMSM is desired and various sensorless control strategies have been investigated. This paper presents a novel sensorless control strategy for an interior permanent magnet synchronous motor (IPMSM). A new model of IPMSM using an extended electromotive force (EMF) in the rotating reference frame is utilized in order to estimate both position and speed. The extended EMF is estimated by the least‐order observer, and the estimation position error is directly obtained. The proposed scheme corrects the estimated position and speed so that the estimation position error becomes zero. The proposed system is very simple and the design of the controller is easy. Several drive tests are carried out and the experimental results show the effectiveness of the proposed sensorless control system. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 144(2): 43–52, 2003; Published online in Wiley InterScience ( www. interscience.wiley.com ). DOI 10.1002/eej.10180 相似文献
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Driving a permanent magnet synchronous motor (PMSM) requires the rotor position information to control the motor torque, and this is generally detected by mechanical position sensors such as an encoder or a resolver. However, these sensors increase the machine size and the cost of the drive, and reduce reliability of the system. Therefore, many papers about position sensorless drive method of PMSM have been published. This paper presents a position sensorless control of interior permanent magnet synchronous motor (IPMSM). A mathematical model of IPMSM using the extended electromotive force (EMF) in the rotating reference frame is utilized to estimate the rotor speed and position. This model has a simple structure integrating position information into the extended EMF term. Therefore, the sensorless control based on the mathematical motor model can be implemented simply. The estimation method proposed is based on the principle that the error of the current is proportional to that of extended EMF. This method was carried out using a 6‐pole, 400‐W, 1750 r/min test motor system. It was found that sensorless speed control was achieved from 80 r/min to 1800 r/min under 0 to 100%loads. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 161(3): 41–48, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20406 相似文献
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提出了一种基于Unscented Kalman非线性滤波(UKF)的永磁同步电机无位置传感器控制方法。利用易于检测的电机端电压和端电流,采用UKF算法实时地估计电机的转速和磁极位置,得到矢量控制系统转速反馈信号和矢量变换角度。永磁同步电机无位置传感器转速控制仿真结果表明.本文提出的估计算法既具有较高的估计精度又具有相对少的计算量,可以满足永磁同步电机伺服系统无位置传感器控制需要。 相似文献