本文選題：異步電機(jī) + DSP　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：目前,矢量控制的思想在各個(gè)領(lǐng)域中都得到了廣泛的應(yīng)用,它通過坐標(biāo)變換,實(shí)現(xiàn)了異步電機(jī)的解耦控制,從而達(dá)到了與直流電機(jī)一樣的動(dòng)態(tài)調(diào)速性能。在矢量控制系統(tǒng)中,磁鏈的準(zhǔn)確估算是解耦控制的關(guān)鍵,而磁鏈準(zhǔn)確估算在很大程度上依賴于電機(jī)參數(shù)的準(zhǔn)確性,因此準(zhǔn)確的電機(jī)參數(shù)是矢量控制能否達(dá)到高性能的必要條件。如何獲得準(zhǔn)確的電機(jī)參數(shù)是交流控制領(lǐng)域中研究的一個(gè)重要課題,異步電機(jī)參數(shù)辨識(shí)一直都是國內(nèi)外學(xué)者們關(guān)注的焦點(diǎn)。本文主要研究了異步電機(jī)參數(shù)自整定方法。文章在分析了異步電機(jī)的數(shù)學(xué)模型和等效電路的基礎(chǔ)上,提出了一套電機(jī)靜止條件下的參數(shù)離線辨識(shí)方法。它的主要思想是:采用逆變器向異步電機(jī)施加期望波形的電壓激勵(lì)信號(hào),由電流傳感器采集電流的瞬時(shí)響應(yīng)曲線,采樣信息經(jīng)DSP處理以辨識(shí)電機(jī)運(yùn)行所必須的參數(shù)。本文從理論分析、算法提出、軟件實(shí)現(xiàn)和仿真和實(shí)驗(yàn)驗(yàn)證等方面作了全面研究。首先,分析了參數(shù)變化對(duì)電機(jī)控制性能的影響;其次,在異步電機(jī)反Г型等效電路基礎(chǔ)上,提出了針對(duì)定子電阻、定轉(zhuǎn)子漏感和定子電感等不同參數(shù)的辨識(shí)方法,并對(duì)算法中的理論給出了詳細(xì)的推導(dǎo)過程;再次,采用C語言和匯編語言混合編程的思想,將辨識(shí)算法在基于DSP的運(yùn)動(dòng)控制平臺(tái)上實(shí)現(xiàn),文中對(duì)算法實(shí)現(xiàn)中的具體細(xì)節(jié)作了充分的闡述;最后,以一臺(tái)0.37Kw的小電機(jī)為測(cè)試對(duì)象,分別在MATLAB仿真環(huán)境和DSP運(yùn)動(dòng)控制平臺(tái)上作了驗(yàn)證,給出了仿真及實(shí)驗(yàn)的測(cè)試波形和辨識(shí)結(jié)果,兩種實(shí)驗(yàn)都證明了算法的可行性,辨識(shí)結(jié)果具有一定的精度,能夠?yàn)殡姍C(jī)各種控制算法提供可靠的電機(jī)參數(shù)。
[Abstract]:At present, the idea of vector control has been widely used in various fields. Through coordinate transformation, it realizes decoupling control of asynchronous motor and achieves the same dynamic speed regulation performance as DC motor. In vector control system, the accurate estimation of flux is the key of decoupling control, and the accurate estimation of flux depends on the accuracy of motor parameters to a great extent, so accurate motor parameters are the necessary conditions for vector control to achieve high performance. How to obtain accurate motor parameters is an important research topic in the field of AC control. The identification of asynchronous motor parameters has always been the focus of attention of scholars at home and abroad. This paper mainly studies the method of parameter self-tuning for asynchronous motor. On the basis of analyzing the mathematical model and equivalent circuit of induction motor, a set of off-line identification method of parameters under static condition is proposed. The main idea is to apply the voltage excitation signal of the expected waveform to the induction motor by using the inverter, and the instantaneous response curve of the current is collected by the current sensor, and the sampling information is processed by DSP to identify the necessary parameters for the motor operation. In this paper, the theoretical analysis, algorithm proposed, software implementation and simulation and experimental verification are studied. Firstly, the influence of parameter change on motor control performance is analyzed. Secondly, based on the inverse equivalent circuit of induction motor, the identification method for different parameters, such as stator resistance, stator rotor leakage inductance and stator inductance, is proposed. And the detailed derivation of the theory of the algorithm is given. Thirdly, the identification algorithm is realized on the motion control platform based on DSP by using the idea of mixed programming of C language and assembly language. At last, taking a small motor of 0.37Kw as the test object, it is verified in MATLAB simulation environment and DSP motion control platform. The test waveforms and identification results of simulation and experiment are given. Both experiments prove the feasibility of the algorithm. The identification results have certain accuracy and can provide reliable motor parameters for various motor control algorithms.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM346

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