【摘要】：電機(jī)作為傳動系統(tǒng)中動力設(shè)備,在工程中應(yīng)用廣泛。異步電機(jī)由于結(jié)構(gòu)簡單、價格低廉、運(yùn)行可靠等優(yōu)點(diǎn)在傳動系統(tǒng)中占據(jù)著十分重要的地位,因此其控制策略一直是國內(nèi)外學(xué)者研究的熱點(diǎn)。隨著現(xiàn)代控制理論的不斷發(fā)展和完善,異步電機(jī)調(diào)速系統(tǒng)的動靜態(tài)性能得到了極大的提高。本文在傳統(tǒng)的矢量控制基礎(chǔ)上,結(jié)合協(xié)同理論對異步電機(jī)控制策略進(jìn)行了研究。本文首先根據(jù)坐標(biāo)變換理論建立了異步電機(jī)在三種坐標(biāo)系下的動態(tài)數(shù)學(xué)模型和旋轉(zhuǎn)坐標(biāo)系下的狀態(tài)方程。其次,對電壓空間矢量控制和電流滯環(huán)比較控制的原理和特性進(jìn)行了分析,研究了基于轉(zhuǎn)子磁場定向的矢量控制系統(tǒng)。然后,引入?yún)f(xié)同理論和流形的概念,以二階線性系統(tǒng)為例闡述了基于協(xié)同理論的控制算法求解過程。結(jié)合狀態(tài)空間方程,對異步電機(jī)的控制算法進(jìn)行研究,推導(dǎo)出定子電壓和定子電流給定值的數(shù)學(xué)解析解。通過搭建模型對電機(jī)轉(zhuǎn)速閉環(huán)、磁鏈閉環(huán)控制進(jìn)行仿真,并且對電機(jī)定轉(zhuǎn)子電阻變化時協(xié)同控制系統(tǒng)的動靜態(tài)性能進(jìn)行了分析,驗(yàn)證了協(xié)同控制算法良好的魯棒性。同時,因算法中含有負(fù)載轉(zhuǎn)矩的瞬時值,引入了林伯格轉(zhuǎn)矩觀測器。最后,在理論分析的基礎(chǔ)上,通過異步電機(jī)實(shí)驗(yàn)平臺,對電機(jī)轉(zhuǎn)速進(jìn)行了閉環(huán)實(shí)驗(yàn),驗(yàn)證了協(xié)同控制算法的正確性和可行性。
[Abstract]:As power equipment in transmission system, motor is widely used in engineering. Because of the advantages of simple structure, low price and reliable operation, asynchronous motor occupies a very important position in the transmission system, so its control strategy has been a hot research topic of domestic and foreign scholars. With the development and perfection of modern control theory, the dynamic and dynamic performance of asynchronous motor speed regulating system has been greatly improved. Based on the traditional vector control, the control strategy of asynchronous motor is studied in this paper. In this paper, the dynamic mathematical model of asynchronous motor in three coordinate systems and the equation of state in rotating coordinate system are established according to the coordinate transformation theory. Secondly, the principle and characteristics of voltage space vector control and current hysteresis comparison control are analyzed, and the vector control system based on rotor magnetic field orientation is studied. Then, the cooperative theory and the concept of manifold are introduced. Taking the second-order linear system as an example, the solving process of the control algorithm based on the cooperative theory is described. Based on the state space equation, the control algorithm of induction motor is studied, and the mathematical analytical solution of stator voltage and stator current is derived. The simulation of motor speed closed-loop and flux chain closed-loop control is carried out by building a model, and the dynamic and static performance of the cooperative control system is analyzed when the resistance of stator and rotor changes. The good robustness of the cooperative control algorithm is verified. At the same time, because the algorithm contains the instantaneous value of load torque, the Linberg torque observer is introduced. Finally, on the basis of theoretical analysis, the closed-loop experiment of motor speed is carried out on the experimental platform of asynchronous motor, which verifies the correctness and feasibility of the cooperative control algorithm.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM343

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