本文選題：永磁同步電機 + SVPWM　； 參考：《浙江理工大學》2017年碩士論文

【摘要】：隨著永磁交流伺服技術突飛猛進的發(fā)展,運用永磁同步電機的場合逐漸增多,利用永磁同步電機的系統(tǒng)會更加復雜。這就要求伺服系統(tǒng)有更好的魯棒性和速度跟蹤性能。滑模變結構控制理論逐漸延伸到電力傳動控制領域,因其響應速度快,設計簡單,同時魯棒性較強。但是由于操作過程中頻繁的開關控制會導致抖振現象,這對實際工程來說是一個嚴峻的問題。發(fā)生抖振的原因在于執(zhí)行機構與實際控制器之間無法進行高頻切換,且系統(tǒng)存在穩(wěn)態(tài)誤差,嚴重時高頻振動會引起系統(tǒng)元件損壞。本文在永磁同步電動機中增加了二階滑模變結構控制,并對其進行全面深入探究,克服了外界干擾和參數變化的影響,增強了伺服系統(tǒng)的魯棒性和動態(tài)性能。本文首先簡述了電壓空間矢量脈沖寬度調制(SVPWM)的基本概念和調制技術原理,并且具體講述了SVPWM算法的實現。經典的SPWM控制主要著眼于使變壓變頻器的輸出電壓盡量接近正弦波,并未顧及輸出電流的波形。然而交流電動機需要輸入三相正弦電流的,從而產生電磁轉矩。因此,永磁同步電機通常采用SVPWM控制技術。本文選取id=0轉子磁場定向控制方法,這種控制方法系統(tǒng)簡單,電流利用率高,轉矩定性好,且調速范圍廣泛。轉子磁場定向控制能夠解耦定子電流中的兩個分量,使得永磁同步電機獲得類似與直流電機的性能以及控制方式。在傳統(tǒng)滑模的基礎上,介紹了二階滑�？刂频幕驹砗退惴�,提出了一種永磁同步電機的二階滑模算法,利用Matlab/simulink軟件搭建了一種基于電壓空間矢量脈沖寬度調制的的永磁同步電動機二階滑�？刂葡到y(tǒng)并進行了仿真。仿真波形和數據表明:基于二階滑模算法的永磁同步電機控制方法能夠快速調整負載變化帶來的速度擾動,從而提高了永磁同步電機伺服系統(tǒng)的動態(tài)性能;二階滑模控制方法在保持傳統(tǒng)滑模的結構簡單和魯棒性較強優(yōu)勢的同時,不會給系統(tǒng)帶來抖振的現象。由此可見,基于二階滑模算法的永磁同步電機伺服系統(tǒng)具有較好的動態(tài)性能、較強的魯棒性和抗干擾性。最后,設計了基于型號為TMS320F28035的DSP芯片的硬件系統(tǒng)。
[Abstract]:With the rapid development of permanent magnet AC servo technology, the applications of permanent magnet synchronous motor (PMSM) are increasing, and the system of PMSM will be more complex. This requires the servo system to have better robustness and speed tracking performance. Sliding mode variable structure control theory is gradually extended to the field of power transmission control, because of its fast response speed, simple design and strong robustness. However, the frequent switching control during operation will lead to buffeting, which is a severe problem for practical engineering. The reason of buffeting is that there is no high frequency switching between the actuator and the actual controller, and there is a steady state error in the system. When the vibration is serious, the high frequency vibration will lead to the damage of the system components. In this paper, the second-order sliding mode variable structure control is added to PMSM, and it is thoroughly studied, which overcomes the influence of external disturbance and parameter change, and enhances the robustness and dynamic performance of servo system. In this paper, the basic concept and principle of voltage space vector pulse width modulation (SVPWM) are introduced, and the implementation of SVPWM algorithm is described in detail. The classical SPWM control mainly focuses on making the output voltage of the variable-voltage converter as close as possible to sine wave without considering the waveform of output current. However, AC motors need to input three-phase sinusoidal current, thus producing electromagnetic torque. Therefore, permanent magnet synchronous motor (PMSM) usually adopts SVPWM control technology. In this paper, the id=0 rotor field oriented control method is selected, which is simple in system, high in current utilization rate, good in torque quality and wide in speed range. Rotor flux oriented control can decouple two components of stator current, which makes permanent magnet synchronous motor obtain the same performance and control mode as DC motor. Based on the traditional sliding mode, the basic principle and algorithm of second-order sliding mode control are introduced, and a second-order sliding mode algorithm for permanent magnet synchronous motor is proposed. The second order sliding mode control system of permanent magnet synchronous motor based on voltage space vector pulse width modulation is built by using Matlab/simulink software and simulated. The simulation waveform and data show that the PMSM control method based on the second-order sliding mode algorithm can quickly adjust the speed disturbance caused by the load change, thus improving the dynamic performance of PMSM servo system. The second-order sliding mode control method does not bring buffeting phenomenon to the system while keeping the simple structure and strong robustness of the traditional sliding mode control method. Thus, the PMSM servo system based on second-order sliding mode algorithm has better dynamic performance, strong robustness and anti-interference. Finally, the hardware system of DSP chip based on TMS320F28035 is designed.
【學位授予單位】：浙江理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP273;TM341

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本文編號：1844436