發(fā)布時間：2018-01-24 13:12

  本文關(guān)鍵詞： 永磁同步電機 SVPWM調(diào)制 弱磁控制 電壓反饋 Matlab/Simulink仿真　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來，隨著高性能永磁材料的深入研究和使用，以及電力電子器件性能指數(shù)的不斷改善，高性能永磁同步伺服系統(tǒng)得到了迅速的發(fā)展。然而，當(dāng)將其應(yīng)用在諸如電動車、機場大廳多人運輸車、叉車、機床主軸驅(qū)動等場合時，對于整個系統(tǒng)提出了更高的性能要求，不僅要求在低速時輸出較大的轉(zhuǎn)矩，還希望穩(wěn)定運行時獲得更高的運行速度。而常規(guī)矢量控制方法已經(jīng)無法使電機運行在額定轉(zhuǎn)速以上，因此，拓寬電機的調(diào)速范圍成為電機控制方面亟須解決的問題。永磁同步電機的弱磁控制能夠使電機運行于基速以上，拓寬電機的調(diào)速范圍，進而永磁同步調(diào)速系統(tǒng)弱磁控制成為現(xiàn)今電機領(lǐng)域的一個研究熱點。 本文首先就永磁同步電機弱磁控制的國內(nèi)外發(fā)展現(xiàn)狀和未來發(fā)展趨勢進行了簡單介紹，建立了永磁同步電機在旋轉(zhuǎn)坐標系下的動態(tài)模型，介紹了常用的矢量控制策略，，并通過控制效果對比引出永磁同步電機弱磁控制方法。 然后，詳細介紹了永磁同步電機的弱磁控制原理，并對弱磁控制的約束條件、弱磁控制區(qū)間的電流給定及現(xiàn)有弱磁控制策略做了簡單的介紹，推導(dǎo)了電機在恒轉(zhuǎn)矩控制和弱磁控制階段中永磁同步電機電流矢量在電流平面的運行軌跡及其相關(guān)說明。深入研究了基于電壓反饋的永磁同步電機弱磁控制算法。 最后，基于電壓反饋弱磁算法對控制系統(tǒng)建模，構(gòu)建了以SVPWM為調(diào)制算法，基于電壓反饋的永磁同步電機弱磁控制系統(tǒng)框圖，對框圖中的關(guān)鍵模塊進行了分析和設(shè)計，并借助Matlab/Simulink軟件對控制系統(tǒng)進行了建模和仿真，仿真結(jié)果驗證了基于電壓反饋的弱磁控制方法的可行性和有效性。并由仿真結(jié)果分析指出基于電壓反饋弱磁控制策略的不足點，從而為該弱磁控制策略的進一步完善提出新的思路。
[Abstract]:In recent years, with the deep research and application of high performance permanent magnet materials and the continuous improvement of power electronic device performance index, the high performance permanent magnet synchronous servo system has been developed rapidly. When it is applied to such occasions as electric vehicles, multi-person transport vehicles in airport halls, forklifts, machine tool spindle drive and so on, it puts forward higher performance requirements for the whole system, not only requires a large torque output at low speed. The conventional vector control method can not make the motor run above rated speed. Widening the speed range of the motor becomes an urgent problem in motor control. The weak magnetic field control of the permanent magnet synchronous motor can make the motor run above the basic speed and widen the speed range of the motor. Furthermore, permanent magnet synchronous speed control system has become a research hotspot in the field of motor. In this paper, the current situation and future development trend of PMSM weak magnetic control are introduced briefly, and the dynamic model of PMSM in rotating coordinate system is established. The common vector control strategy is introduced, and the control method of permanent magnet synchronous motor (PMSM) is introduced by comparing the control results. Then, the principle of the weak magnetic field control of the permanent magnet synchronous motor is introduced in detail, and the constraint conditions of the weak magnetic field control, the current given in the weak magnetic field control section and the existing weak magnetic field control strategy are simply introduced. In this paper, the current vector of permanent magnet synchronous motor (PMSM) in the phase of constant torque control and weak magnetic field control is deduced and its related explanation is given. The weak magnetic control algorithm of PMSM based on voltage feedback is deeply studied. . Finally, the control system is modeled based on voltage feedback weakening algorithm, and the block diagram of permanent magnet synchronous motor weak magnetic field control system based on voltage feedback is constructed based on SVPWM modulation algorithm. The key modules in the block diagram are analyzed and designed, and the control system is modeled and simulated with the help of Matlab/Simulink software. The simulation results verify the feasibility and effectiveness of the weak magnetic field control method based on voltage feedback, and point out the shortcomings of the weak magnetic field control strategy based on voltage feedback through the analysis of simulation results. Therefore, a new idea is put forward for the further improvement of the weak magnetic field control strategy.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM341

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本文編號：1460125