發(fā)布時間：2018-05-06 03:42

  本文選題：永磁同步電機 + 無傳感器控制��； 參考：《東北大學(xué)》2014年碩士論文

【摘要】：近年來,永磁同步電動機(Permanent Magnet Synchronous Motor, PMSM)以其體積小、損耗低、效率高等優(yōu)異性能在大功率傳動領(lǐng)域得到了廣泛的應(yīng)用,永磁同步電動機的精確控制需要轉(zhuǎn)子的位置信息,最常用的方法是在轉(zhuǎn)子軸上安裝位置傳感器來測量電機轉(zhuǎn)子的轉(zhuǎn)速和位置信息。但是高精度、高分辨率的速度和位置傳感器通常價格比較昂貴,這樣不僅增加了整個系統(tǒng)的成本,同時還造成了接線的復(fù)雜,限制了驅(qū)動裝置在惡劣環(huán)境下的應(yīng)用。因此,研究永磁同步電機的無位置傳感器技術(shù)具有重要的現(xiàn)實意義,它主要依據(jù)電機的數(shù)學(xué)方程間接估算轉(zhuǎn)速和轉(zhuǎn)子位置。其中,脈振高頻電壓信號注入法的系統(tǒng)結(jié)構(gòu)實現(xiàn)相對比較簡單,而且無需大量的坐標(biāo)運算和數(shù)字濾波器。本文分析了脈振高頻電壓信號注入法的基本原理,建立了在高頻信號激勵下的內(nèi)埋式永磁同步電機的數(shù)學(xué)模型。研究了基于脈振高頻電壓注入法的控制策略,采用脈振高頻電壓信號注入法估算PMSM的轉(zhuǎn)子位置信息,利用電動機繞組所產(chǎn)生的相關(guān)電信號,通過設(shè)計的PⅡ控制算法估計出轉(zhuǎn)子的速度和位置信息,設(shè)計了轉(zhuǎn)子極性判斷部分用以區(qū)分轉(zhuǎn)子的N、S極,可以實現(xiàn)位置的準(zhǔn)確估計。建立了基于脈振高頻電壓注入法的PMSM無傳感器矢量控制系統(tǒng)仿真模型,對轉(zhuǎn)子位置估計值與實際值、轉(zhuǎn)子位置估計誤差以及轉(zhuǎn)速估計值與實際值進行了比較仿真實驗,實驗結(jié)果表明,脈振高頻電壓信號注入法能夠在全速度范圍內(nèi)準(zhǔn)確檢測出轉(zhuǎn)子的位置,同時使系統(tǒng)具有較好的靜、動態(tài)響應(yīng)特性。開發(fā)了以DSP為控制核心的PMSM無位置傳感器矢量控制系統(tǒng)的實驗平臺,分別進行了軟硬件設(shè)計,實現(xiàn)了永磁同步電機調(diào)速系統(tǒng)的無傳感器運行。對控制系統(tǒng)進行了實驗驗證。實驗結(jié)果表明,基于脈振高頻電壓信號注入的轉(zhuǎn)子位置自檢測方法可以實現(xiàn)無位置傳感器運行,而且對電動機參數(shù)的變化不敏感,對外界的干擾也具有很好的魯棒性。
[Abstract]:In recent years, permanent Magnet Synchronous Motor, PMSM) (permanent magnet synchronous motor) has been widely used in the field of high-power transmission because of its small size, low loss and high efficiency. The precise control of permanent magnet synchronous motor needs rotor position information. The most commonly used method is to install a position sensor on the rotor shaft to measure the rotor speed and position information. However, high precision and high resolution speed and position sensors are usually more expensive, which not only increases the cost of the whole system, but also leads to the complexity of the connection, which limits the application of the drive device in the harsh environment. Therefore, it is of great practical significance to study the sensorless technology of permanent magnet synchronous motor (PMSM), which estimates the rotational speed and rotor position indirectly according to the mathematical equations of the PMSM. Among them, the system structure of pulse high frequency voltage signal injection method is relatively simple, and there is no need for a large number of coordinate operation and digital filter. In this paper, the basic principle of pulse vibration high frequency voltage signal injection method is analyzed, and the mathematical model of embedded permanent magnet synchronous motor excited by high frequency signal is established. The control strategy based on high frequency voltage injection method of pulse vibration is studied. The rotor position information of PMSM is estimated by the high frequency voltage signal injection method of pulse vibration, and the related electrical signals generated by motor windings are used. The speed and position information of the rotor are estimated by the designed P 鈪，

本文編號：1850662