本文選題：永磁同步牽引電機(jī) + 矢量控制��； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：隨著軌道交通的快速發(fā)展,如何更好的提高列車牽引性能引起了人們的廣泛關(guān)注。永磁同步牽引電機(jī)因其效率高、體積小、重量輕等優(yōu)點(diǎn),應(yīng)用于列車牽引傳動系統(tǒng)時可以顯著地提高列車的性能。 內(nèi)置式永磁同步牽引電機(jī)交直軸磁路的不對稱以及電機(jī)磁場交叉飽和導(dǎo)致了內(nèi)置式永磁同步牽引電機(jī)電感參數(shù)隨電機(jī)電流的變化而變化,其對電機(jī)的控制性能造成一定的影響。本文分析了內(nèi)置式永磁同步牽引電機(jī)在電機(jī)運(yùn)行過程中發(fā)生的磁場飽和現(xiàn)象,以及由此產(chǎn)生的電感變化機(jī)理。并使用有限元計算軟件對某600kW內(nèi)置式永磁同步牽引電機(jī)電感參數(shù)進(jìn)行計算,得到其電感隨電流變化的曲線。然后,本文研究了電感參數(shù)變化對于牽引傳動系統(tǒng)控制的影響,對比分析了固定的交軸電感值和隨交軸電流變化而變化的交軸電感值所對應(yīng)的最大轉(zhuǎn)矩電流比控制曲線。當(dāng)交軸電感隨交軸電流的不同而變化時,若在控制器中不進(jìn)行相應(yīng)的變化,則電機(jī)實際輸出的轉(zhuǎn)矩不能達(dá)到指令值,對牽引效果有著顯著影響。本文使用Matlab軟件搭建了內(nèi)置式永磁同步牽引電機(jī)控制系統(tǒng)對以上問題進(jìn)行仿真驗證。 同時,本文基于內(nèi)置式永磁同步牽引電機(jī)的實際應(yīng)用,利用帶遺忘因子的遞推最小二乘法對電機(jī)電感參數(shù)進(jìn)行在線辨識。該方法利用當(dāng)前時刻的采樣值和上-時刻的結(jié)果得到當(dāng)前時刻電感的估計值。避免了普通最小二乘法存儲量大的問題。Matlab仿真結(jié)果表明,該方法可較為準(zhǔn)確并快速地得到永磁電機(jī)交軸電感的估計值。 本文基于Myway永磁同步電機(jī)控制實驗平臺進(jìn)行了帶有參數(shù)辨識的內(nèi)置式永磁同步電機(jī)矢量控制實驗。實驗結(jié)果表明采用該方法后,內(nèi)置式永磁同步電機(jī)對轉(zhuǎn)矩指令值的響應(yīng)有了明顯的改善。
[Abstract]:With the rapid development of rail transit, how to improve the traction performance of trains has attracted wide attention. The permanent magnet synchronous traction motor (PMSM) has the advantages of high efficiency, small volume and light weight, so it can improve the train performance significantly when it is applied to the train traction transmission system. The asymmetry of the AC axis magnetic circuit and the cross-saturation of the magnetic field of the built-in permanent magnet synchronous traction motor lead to the change of the inductance parameters with the change of the motor current, which has a certain influence on the control performance of the motor. In this paper, the saturation phenomenon of magnetic field and the mechanism of inductance variation of built-in permanent magnet synchronous traction motor (PMSM) are analyzed. The inductance parameters of a 600kW built-in permanent magnet synchronous traction motor are calculated by using finite element software, and the curves of inductance varying with current are obtained. Then, the influence of the change of inductance parameters on the control of traction drive system is studied, and the maximum torque / current ratio control curve corresponding to the fixed cross-axis inductance and the change of cross-axis inductance with the change of cross-axis current is compared and analyzed. When the cross-axis inductance varies with the cross-axis current, if the controller does not change, the actual output torque of the motor can not reach the instruction value, which has a significant impact on the traction effect. In this paper, a built-in permanent magnet synchronous traction motor control system is built by using Matlab software. At the same time, based on the practical application of built-in permanent magnet synchronous traction motor, a recursive least square method with forgetting factor is used to identify the inductance parameters online. The method uses the sampling value of the current moment and the result of the upper-moment to obtain the estimated value of the inductance at the current time. The simulation results of Matlab show that the method can get the estimated value of AC shaft inductance of permanent magnet motor accurately and quickly. Based on Myway permanent magnet synchronous motor control experiment platform, the vector control experiment of built-in permanent magnet synchronous motor with parameter identification is carried out in this paper. The experimental results show that the response of built-in PMSM to torque instruction value is improved obviously.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM922.71

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本文編號：1991705