本文選題：異步電機(jī) + 無(wú)速度傳感器矢量控制�。� 參考：《中國(guó)礦業(yè)大學(xué)》2014年碩士論文

【摘要】：異步電機(jī)無(wú)速度傳感器矢量控制系統(tǒng)舍棄了物理的速度傳感器，不僅降低了系統(tǒng)的成本，而且使得整個(gè)系統(tǒng)更加便捷、穩(wěn)定和可靠，是國(guó)內(nèi)外研究的熱點(diǎn)之一。 本文對(duì)異步電機(jī)的數(shù)學(xué)模型和矢量控制方法進(jìn)行了闡述，深入分析了按轉(zhuǎn)子磁鏈定向的矢量控制基本原理及其控制方法，研究了異步電機(jī)的可控性和可觀性，并根據(jù)波波夫（Popov）超穩(wěn)定性理論推導(dǎo)出模型參考自適系統(tǒng)（MRAS）的轉(zhuǎn)速估計(jì)自適應(yīng)率。 準(zhǔn)確并且可靠的轉(zhuǎn)速信息是保證電機(jī)能夠安全、可靠和高效工作的前提。本文在深入研究異步電機(jī)高頻信號(hào)注入方法的基礎(chǔ)上，結(jié)合異步測(cè)速發(fā)電機(jī)的基本原理，提出了一種利用高頻環(huán)流估計(jì)轉(zhuǎn)速的方法。與其它高頻信號(hào)注入的方法相比，高頻環(huán)流法不依賴于電機(jī)的非理想特性也不需要對(duì)電機(jī)結(jié)構(gòu)做任何更改，不僅適用于鼠籠式異步電機(jī)同樣也適用于繞線式異步電機(jī)，具有良好的通用性與實(shí)用性；同時(shí)，本文提出的高頻環(huán)流法保留了高頻信號(hào)注入法對(duì)電機(jī)參數(shù)不敏感的特性，并且改善了高頻信號(hào)注入法在電機(jī)低速時(shí)的缺點(diǎn)，拓寬了轉(zhuǎn)速估計(jì)的范圍。仿真結(jié)果顯示，高頻環(huán)流法能夠在很寬的轉(zhuǎn)速范圍內(nèi)實(shí)現(xiàn)電機(jī)轉(zhuǎn)速的準(zhǔn)確估計(jì)，且動(dòng)態(tài)響應(yīng)很快。 本文在異步電機(jī)矢量控制系統(tǒng)的基礎(chǔ)上，構(gòu)建了基于高頻環(huán)流法的異步電機(jī)無(wú)速度傳感器系統(tǒng)仿真模型，并和基于模型參考自適應(yīng)法的系統(tǒng)仿真模型進(jìn)行了仿真對(duì)比，結(jié)果表明：高頻環(huán)流法對(duì)電機(jī)參數(shù)的變化和外界的干擾具有很強(qiáng)的魯棒性，且整個(gè)系統(tǒng)具有良好的動(dòng)靜態(tài)性能。同時(shí)，，本文通過(guò)電機(jī)實(shí)驗(yàn)平臺(tái)對(duì)高頻環(huán)流法進(jìn)行了實(shí)驗(yàn)驗(yàn)證，實(shí)驗(yàn)結(jié)果證明了利用高頻環(huán)流法對(duì)異步電機(jī)進(jìn)行轉(zhuǎn)速估計(jì)的有效性和可行性。
[Abstract]:The speed sensorless vector control system of asynchronous motor has abandoned the physical speed sensor, which not only reduces the cost of the system, but also makes the whole system more convenient, stable and reliable. In this paper, the mathematical model and vector control method of induction motor are described. The basic principle and control method of vector control based on rotor flux linkage are deeply analyzed, and the controllability and observability of asynchronous motor are studied. According to Popov's hyperstability theory, the adaptive rate of speed estimation for model reference adaptive system (MRAs) is derived. Accurate and reliable speed information is the premise to ensure the safety, reliability and efficiency of the motor. Based on the deep study of the high frequency signal injection method of asynchronous motor and the basic principle of asynchronous speed measuring generator, a method of speed estimation based on high frequency circulation is proposed in this paper. Compared with other high frequency signal injection methods, the high frequency loop method does not depend on the non-ideal characteristics of the motor and does not need to make any changes to the motor structure. It is suitable not only for squirrel cage asynchronous motor but also for winding asynchronous motor. At the same time, the high frequency signal injection method is not sensitive to the parameters of the motor, and improves the shortcomings of the high frequency signal injection method at low speed. The range of speed estimation is widened. The simulation results show that the high frequency loop method can accurately estimate the motor speed in a wide speed range and the dynamic response is very fast. On the basis of vector control system of asynchronous motor, the simulation model of speed sensorless system for induction motor based on high frequency circulation method is constructed, and the simulation model based on model reference adaptive method is compared. The results show that the high frequency loop method is robust to the variation of motor parameters and external disturbance, and the whole system has good dynamic and static performance. At the same time, the high frequency loop method is verified by the motor experiment platform. The experimental results show the validity and feasibility of using the high frequency loop method to estimate the speed of asynchronous motor.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM343;TM301.2

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