本文選題：無(wú)速度傳感器 + 異步電機(jī)　； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：隨著微電子技術(shù)和現(xiàn)代控制理論的不斷發(fā)展,矢量控制已經(jīng)成為異步電機(jī)速度控制的主流控制方式。傳統(tǒng)的矢量控制系統(tǒng)采用速度閉環(huán)控制,但由于有速度傳感器的存在,這樣不僅增加了控制系統(tǒng)的成本,也使系統(tǒng)變得更為復(fù)雜,此外,速度傳感器的安裝易受到工作環(huán)境的影響,這一缺點(diǎn)不利于在工業(yè)控制中的廣泛使用,同時(shí)在計(jì)算磁鏈時(shí),由于采用單一的電壓模型或電流模型,其計(jì)算精度易受變化的轉(zhuǎn)子電阻的影響,進(jìn)而影響了合成矢量定向的準(zhǔn)確性。 本文首先介紹了交流調(diào)速控制技術(shù)的研究現(xiàn)狀和多個(gè)無(wú)速度傳感器技術(shù)的優(yōu)缺點(diǎn),接著概述了異步電機(jī)數(shù)學(xué)模型、坐標(biāo)變換、矢量控制的基本理論。針對(duì)無(wú)速度傳感器矢量控制系統(tǒng)的關(guān)鍵問(wèn)題：轉(zhuǎn)速的估計(jì),在前人的研究基礎(chǔ)之上,提出了一種新型的基于MRAS無(wú)速度傳感器轉(zhuǎn)子磁場(chǎng)定向矢量控制方案,該方案綜合了MRAS和SVPWM的優(yōu)點(diǎn),控制策略更為先進(jìn)。接著針對(duì)本文所設(shè)計(jì)的控制方案,在Matlab/simulink軟件平臺(tái)上,搭建了該新型無(wú)速度傳感器矢量控制系統(tǒng)的仿真模型,仿真結(jié)果表明,本文設(shè)計(jì)的新型無(wú)速度傳感器矢量控制系統(tǒng)不僅能對(duì)電機(jī)轉(zhuǎn)速實(shí)時(shí)辨識(shí),且具有更好的動(dòng)態(tài)性能,諧波含量也有所改進(jìn),同時(shí)也驗(yàn)證了本文所設(shè)計(jì)的新型控制系統(tǒng)的可行性與實(shí)用性。 在仿真驗(yàn)證了無(wú)速度傳感器矢量控制系統(tǒng)方案可行性的情況下,對(duì)系統(tǒng)進(jìn)行了以STM32F103R8為主控芯片的硬件和軟件設(shè)計(jì),在本文最后,對(duì)本次研究工作進(jìn)行了總結(jié),并針對(duì)依然存在的問(wèn)題提出了改進(jìn)建議。
[Abstract]:With the development of microelectronic technology and modern control theory, vector control has become the mainstream control method of asynchronous motor speed control. The traditional vector control system adopts speed closed loop control, but because of the existence of speed sensor, it not only increases the cost of the control system, but also makes the system more complex. The installation of speed sensors is easily affected by the working environment, which is not conducive to wide use in industrial control. At the same time, when calculating flux chains, a single voltage model or current model is used. The accuracy of the synthetic vector orientation is affected by the variable rotor resistance. This paper first introduces the research status of AC speed regulation control technology and the advantages and disadvantages of several speed sensorless technologies, and then summarizes the basic theory of asynchronous motor mathematical model, coordinate transformation and vector control. Aiming at the key problem of speed sensorless vector control system: speed estimation, a novel speed sensorless rotor flux oriented vector control scheme based on MRAS is proposed. The scheme combines the advantages of MRAS and SVPWM, and the control strategy is more advanced. Then, the simulation model of the new speed sensorless vector control system is built on the Matlab/simulink software platform, and the simulation results show that, The new speed sensorless vector control system designed in this paper not only can identify the motor speed in real time, but also has better dynamic performance and improved harmonic content. It also verifies the feasibility and practicability of the new control system designed in this paper. In the case of simulation to verify the feasibility of speed sensorless vector control system, the hardware and software design of the system using STM32F103R8 as the main control chip is carried out. At the end of this paper, the research work is summarized. Suggestions for improvement are put forward in view of the existing problems.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM343

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本文編號(hào)：1854156