本文關(guān)鍵詞： 梯形波永磁無刷直流電機(jī) 120度導(dǎo)通型矢量控制 180度導(dǎo)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(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：梯形波永磁無刷直流電機(jī)(Brushless DC Motor, BLDC)作為一種典型的機(jī)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(diǎn),而被廣泛用于工業(yè)各個領(lǐng)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(jìn)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(kuò)速,其被應(yīng)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(dǎo)通型的方波控制方案和180度導(dǎo)通型的矢量控制方案進(jìn)行了研究,以期獲得實(shí)用的弱磁擴(kuò)速方案。與正弦波永磁同步電機(jī)不同,考慮到BLDC電機(jī)定子繞組感應(yīng)電勢為梯形波的特點(diǎn),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(xué)模型,為進(jìn)一步研究上述兩種控制方案奠定理論基礎(chǔ)。針對120度導(dǎo)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(dǎo)通型的方波控制方案擴(kuò)展至弱磁區(qū)。考慮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(shè)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(dǎo)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(jī)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(yùn)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(jìn)行了仿真研究,并對各自的特點(diǎn)和性能的優(yōu)劣進(jìn)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(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM33

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本文編號：1487385