【摘要】：開關磁阻電機(Switched Reluctance Motor,簡稱SRM)具有制作成本低,機械結構簡單,運行時容錯能力強,可靠性高等一系列優(yōu)點。而電機本體的雙凸極構造,磁邊緣效應和磁飽和效應使得電機各相磁鏈和轉矩都是轉子位置與定子電流的強耦合非線性函數(shù),導致了電機模型的嚴重非線性。因此,SRM的可靠運行依賴于對轉子位置的準確判斷,傳統(tǒng)的位置傳感器的使用卻降低了整個開關磁阻電機系統(tǒng)的可靠性,同時又增加了控制系統(tǒng)的成本與復雜性。基于開關磁阻電機的無位置傳感器控制方法已日益成為SRM控制驅動技術研究領域的一大熱點。目前本文所做的研究工作主要包括如下四個方面:(1)闡述了開關磁阻電機基本工作原理,詳細分析了電機數(shù)學模型,為后續(xù)無位置傳感器控制方法的研究提供理論依據(jù)。.(2)開關磁阻電機無位置傳感器控制方法介紹,分析了各方法的優(yōu)缺點,重點進行了基于高頻脈沖注入法的無位置傳感器控制策略研究。針對電機啟動過程中的不同狀態(tài)提出了前相檢測控制策略和后相檢測控制策略來實現(xiàn)電機的無反轉啟動以及后續(xù)高速運轉。在高頻注入法的基礎上實現(xiàn)了電機轉速閉環(huán)控制。(3)在SRM理論研究的基礎上,設計了開關磁阻電機無位置傳感器控制系統(tǒng),包括基于MOSFET的驅動電路,基于STM32的控制電路以及相關控制程序。(4)搭建了開關磁阻電機控制系統(tǒng)試驗平臺,驗證了高頻脈沖注入控制策略的有效性以及整個控制系統(tǒng)的可靠性,并測試了系統(tǒng)的調速性能。
[Abstract]:Switched reluctance motor (Switched Reluctance Motor,) has a series of advantages, such as low cost, simple mechanical structure, strong fault tolerance and high reliability. Because of the double salient pole structure, the magnetic edge effect and the magnetic saturation effect, the flux chain and torque of the motor are strongly coupled nonlinear functions between the rotor position and the stator current, which leads to the serious nonlinearity of the motor model. Therefore, the reliable operation of SRM depends on the accurate determination of rotor position. The traditional position sensor reduces the reliability of the switched reluctance motor system and increases the cost and complexity of the control system. The sensorless control method based on switched reluctance motor (SRM) has become a hotspot in the field of SRM control and drive technology. At present, the research work in this paper mainly includes the following four aspects: (1) the basic working principle of switched reluctance motor (SRM) is expounded, and the mathematical model of SRM is analyzed in detail. (2) introduce the sensorless control method of switched reluctance motor, and analyze the advantages and disadvantages of each method. The research of position sensorless control strategy based on high frequency pulse injection method is emphasized. Aiming at the different states of motor start-up, the forward phase detection control strategy and the rear phase detection control strategy are proposed to realize the motor starting without inversion and subsequent high speed operation. The closed-loop control of motor speed is realized on the basis of high-frequency injection method. (3) based on the research of SRM theory, the sensorless control system of switched reluctance motor is designed, including the driving circuit based on MOSFET. Based on the STM32 control circuit and related control program. (4) the experimental platform of switched reluctance motor control system is built to verify the effectiveness of the high-frequency pulse injection control strategy and the reliability of the whole control system.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM352;TP273

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