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题名	交流异步电机无速度传感器矢量控制方法及其在电动汽车中的应用研究; 交流异步电机无速度传感器矢量控制方法及其在电动汽车中的应用研究
作者	1陈桂兰,电工研究所
学位类别	博士
答辩日期	2005
授予单位	中国科学院电工研究所
导师	1温旭辉,电工研究所
关键词	感应电机 磁链观测 电压模型 电流模型 全阶状态观测器 电压 Induction Motor Flux Observation Voltage Model Current Model Full Order Observation Device Parameter Identification
其他题名	交流异步电机无速度传感器矢量控制方法及其在电动汽车中的应用研究
学位专业	电机与电器
中文摘要	对于电动汽车中交流异步电机驱动系统来说，无速度传感器矢量控制方法的关键技术是准确自勺磁场定向。磁链观测是关系到能否实现准确的磁场定向的关键，这将决定着电动汽车能否在低速范围实现稳定的大转矩输出，实现在带载情况下的稳定起动及稳定运行。本文的研究工作主要是围绕着针对异步电机的全阶状态观测器磁链观测展开的。主要内容有以下几个方面：1．通过对全阶状态观测器与电压模型、电流模型磁链观测器之间的关系的分析，得出结论：极点配置使全阶状态观测器磁链观测值在低速范围更接近电流模型观测值，在高速范围更接近电压模型观测值。2．通过分析电压误差和电流误差与全阶状态观测器磁链观测误差之间的关系，在转速已知的条件下，提出了降低电压误差和电流误差影响的极点配置方法，并通过仿真验证。这对提高磁链观测精度是十分重要的。通过分析参数偏差对全阶状态观测器磁链观测稳态误差的影响，并通过仿真得出：上述的极点配置方法，同样可以降低定子电阻偏差和漏感偏差在极低速范围对磁链观测稳态误差的影响。3．在转速未知的条件下，通过对MRAS磁链观测器的动态性能以及磁链观测稳态误差的分析，并通过仿真得出：磁链观测和转速控制动态性能的改善与磁链观测稳态误差和转速误差的降低是互相矛盾的。对于电动汽车中异步电机控制来说，精确的磁链观测更为重要，当对动态性能要求不高时，可以不进行极点配置。4.针对实际控制中的电压型逆变器，提出利用电流测量值与电流观测值之差进行定子电压误差补偿的方法，刘定子电压重构误差的直流分量和基波分量进行了补偿。通过仿真验证了提出的方法可以提高在电压型逆变器供电隋况下的无速度传感器矢量控制系统的起动和低速运行性能。通过对电压模型磁链观测误差与定子电阻偏差的关系的分析，提出了一种定子电阻在线辨识方法，通过仿真验证了其有效性。5、在基于TMS32OF2407A的感应电机实验平台上，实现了无速度传感器矢量控制方法。验证了本文提出的定子电压误差补偿方法能够有效地提高控制系统的起动性能和带载能力。提出的定子电阻在线辨识方法能够和定子电压误差补偿方法相协调，使系统能够在宽转速范围内稳定运行。 As a rule, the accurate flux orientation that decide whether or not the electric vehicle can realize steady output of high torque in lower speed range and steady start and run with load, is the core of the sensorless vector control for electric vehicle induction machine drive system. However, out of question, the exact flux observation is the key to the realization of the accurate flux orientation.Based on the full order observer, this paper presents a new flux observation method applied to the induction motor, which mainly includes the following parts:Based on the analyses of the relationship between the flux observation of thefull order observer and that of the voltage model / the current model, a newconclusion can be made. That is, the pole point setting of the full order observer canmakes the observation value closer to that of current model in the motor's low speedrange, as well as closer to that of voltage model in the motor's high speed range.Based on the analyses of the relationship between the voltage error / the currenterror and the flux observation error of the full order observer, this paper presents anovel pole point setting method with the condition of the definite motor speed. Themathematic analyses and the computer simulations both verify that such method canreduce the influence of voltage error current error, which is very important to theprecision improvement of the flux observation.Otherwise, the analyses of the influence of parameter error to the flux observation of the full order observer, as well as computer simulation, both show that such method also can reduce the influence of stator resistance error and leak inductance error to the steady error of flux observation in the motor's very low speed range.3. When the motor speed is unknown, based on the analysis of the dynamicperformance of MRAS flux observer and steady error of flux observation, this papermake a such conclusion, which also validated by simulations. That is, theimprovements in the dynamic performance of flux observation and speed control areinconsistent with the reducing'of speed error and steady error of flux observation. Asa matter of fact, the precise flux observation, preferable to the unnecessary pole pointsetting, is more important to the induction motor control applied in electric vehicle. 4. Based on the analyses of the relationship between the stator voltage error and current observation error, according to the actualities of the voltage inverter, this paper presents effective methods which can compensate the stator fundamental voltage amplitude error, as well as DC offset error. The computer simulations verify that such methods can improve the performance of starting and low speed range running of sensorless vector control system driven by voltage inverter.Based on the analyses of flux observation error of voltage model and stator resistance error, a simple and usable online stator resistance identification strategy is presented, and the validity is proved by simulations.5. The experiments of the sensorless vector control methods, implementing on TMS320F2407A DSP based induction motor drive experimental system, verifies that the stator voltage error compensation method, presented by this paper, can effectively improve the starting performances and the loading capabilities of the control system. On the other hand, the online stator resistance identification strategy, also proposed by this paper, is harmony with the compensation method of stator voltage error, which can make the system run steadily in wide speed range.
语种	中文
公开日期	2010-10-18
页码	123
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/6866]
专题	电工研究所_其他部门_其他部门_博士学位论文
推荐引用方式 GB/T 7714	1陈桂兰,电工研究所. 交流异步电机无速度传感器矢量控制方法及其在电动汽车中的应用研究, 交流异步电机无速度传感器矢量控制方法及其在电动汽车中的应用研究[D]. 中国科学院电工研究所. 2005.

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