發(fā)布時間：2018-02-03 12:28

  本文關鍵詞： 梯形波永磁無刷直流電機 120度導通型矢量控制 180度導通型矢量控制 轉(zhuǎn)子位置信息估計 空間矢量調(diào)制 弱磁控制　出處：《山東大學》2015年碩士論文　論文類型：學位論文

【摘要】：梯形波永磁無刷直流電機(Brushless DC Motor, BLDC)作為一種典型的機電體化系統(tǒng),因其具功率密度高,調(diào)速性能好、結(jié)構(gòu)可靠性高等優(yōu)點,而被廣泛用于工業(yè)各個領域。隨著對BLDC傳動系統(tǒng)性能要求的不斷提高,對各種控制方案進行完善就顯得尤為重要。由于傳統(tǒng)方波電流控制方案不利于BLDC的弱磁擴速,其被應用范圍自然受到了一定的限制。本文從矢量控制的角度出發(fā),圍繞著BLDC的兩種控制方案：120度導通型的方波控制方案和180度導通型的矢量控制方案進行了研究,以期獲得實用的弱磁擴速方案。與正弦波永磁同步電機不同,考慮到BLDC電機定子繞組感應電勢為梯形波的特點,本文首先建立了基于定子反電動勢矢量定向的BLDC的數(shù)學模型,為進一步研究上述兩種控制方案奠定理論基礎。針對120度導通型的方波控制方案,本文從定子電流基本矢量的角度出發(fā)提出了一種新型的電流綜合矢量控制方案。該方案不僅適用于基速以下的恒轉(zhuǎn)矩區(qū),而且對基速以上的恒功率區(qū)也十分有效,從而將120度導通型的方波控制方案擴展至弱磁區(qū)�？紤]這種全新的電流綜合矢量控制方案需要全部的轉(zhuǎn)子位置信息,為此,本文還根據(jù)三個霍爾位置傳感器所獲得的轉(zhuǎn)子位置信息設計了轉(zhuǎn)子位置估計器。該轉(zhuǎn)子位置估計器對霍爾位置傳感器的安裝位置具有一定的魯棒性。對于180度導通型的矢量控制方案,本文參照傳統(tǒng)的基于轉(zhuǎn)子磁鏈定向的正弦波永磁同步電機矢量控制方案,建立了基于定子反電動勢矢量定向的適用于梯形波反電勢的BLDC矢量控制方案。該控制方案結(jié)合了過調(diào)制區(qū)和電壓極限圓約束,從而使整個系統(tǒng)可以可靠地運行在基速以上的弱磁區(qū)。論文對上述兩種控制方案的有效性進行了仿真研究,并對各自的特點和性能的優(yōu)劣進行了比較。
[Abstract]:As a typical electromechanical system, trapezoidal permanent magnet brushless DC motor (BLDCM) has high power density and good speed regulation performance. The structure has the advantages of high reliability, and has been widely used in various fields of industry. With the continuous improvement of the performance requirements of BLDC transmission system. It is very important to improve various control schemes because the traditional square-wave current control scheme is not conducive to the weak magnetic expansion of BLDC. The scope of its application is naturally limited. This paper starts from the point of view of vector control. This paper studies two control schemes of BLDC: 120 degree conduction square wave control scheme and 180 degree conduction vector control scheme. Different from sinusoidal permanent magnet synchronous motor (PMSM), the stator winding induction potential of BLDC motor is considered as trapezoidal wave. In this paper, the mathematical model of BLDC based on vector orientation of stator backEMF is established, which lays a theoretical foundation for the further study of the two control schemes mentioned above, aiming at the 120-degree conduction square-wave control scheme. In this paper, a novel current synthesis vector control scheme is proposed from the point of view of the basic stator current vector, which is not only suitable for the constant torque region below the base speed. And it is also very effective for the constant power range above the base speed. Therefore, the 120 degree conduction square wave control scheme is extended to the weak magnetic field. Considering this new current synthesis vector control scheme, all rotor position information is needed. The rotor position estimator is designed according to the rotor position information obtained from three Hall position sensors. The rotor position estimator is robust to the installation position of Hall position sensor. The vector control scheme of degree conduction type. This paper refers to the traditional vector control scheme of sinusoidal permanent magnet synchronous motor (PMSM) based on rotor flux orientation. A BLDC vector control scheme for trapezoidal wave inverse EMF based on stator backEMF vector orientation is established. The control scheme combines overmodulation region and voltage limit circle constraints. So that the whole system can run reliably in the weak magnetic field above the base speed. The effectiveness of the two control schemes is simulated in this paper, and the advantages and disadvantages of the two control schemes are compared.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM33

【參考文獻】

相關期刊論文 前5條

1 劉平;劉剛;張慶榮;;磁懸浮飛輪用BLDC系統(tǒng)的仿真方法與實驗分析[J];航天控制;2007年01期

2 馬瑞卿;李穎;劉冠志;;基于dsPIC30F2010的無刷直流電動機正弦波驅(qū)動系統(tǒng)設計[J];微特電機;2010年08期

3 夏長亮,郭培健,史婷娜,王明超;基于模糊遺傳算法的無刷直流電機自適應控制[J];中國電機工程學報;2005年11期

4 周衛(wèi)平;吳正國;唐勁松;劉大明;;SVPWM的等效算法及SVPWM與SPWM的本質(zhì)聯(lián)系[J];中國電機工程學報;2006年02期

5 高瑾;胡育文;黃文新;黃志峰;;六邊形磁鏈軌跡的無刷直流電機直接自控制[J];中國電機工程學報;2007年15期

相關博士學位論文 前1條

1 嚴嵐;永磁無刷直流電機弱磁技術研究[D];浙江大學;2005年

，

本文編號：1487385