【摘要】：當(dāng)前,變頻調(diào)速技術(shù)的應(yīng)用越來越廣泛,特別是采用V/F控制的異步電機通用變頻調(diào)速系統(tǒng),廣泛應(yīng)用于國民生活的各個領(lǐng)域。但是傳統(tǒng)的調(diào)速系統(tǒng)存在電流波形正弦度低、電機噪聲大、輕載電流波形易振蕩等問題,因此研究通用變頻器調(diào)速系統(tǒng)的關(guān)鍵技術(shù)對工業(yè)發(fā)展具有重要的現(xiàn)實意義。 本次論文對通用變頻器調(diào)速系統(tǒng)的幾項關(guān)鍵技術(shù)進行了理論研究和應(yīng)用,主要包括以下內(nèi)容： 第一部分介紹了課題研究的背景和意義,分析了變頻器的國內(nèi)外研究現(xiàn)狀和未來的發(fā)展趨勢,闡述了課題來源、意義和主要內(nèi)容。 第二部分首先介紹通用變頻器的基本理論,重點分析了變頻調(diào)速的工作原理,最后給出通用變頻器的結(jié)構(gòu)介紹。 第三部分研究電壓空間矢量PWM調(diào)制技術(shù),重點從諧波注入的角度分析不同的調(diào)制方式,研究了多種調(diào)制方式的實現(xiàn)和計算方法,給出軟件實現(xiàn)方案。進行Matlab仿真,并在實際平臺上進行驗證。 第四部分研究了變頻器的死區(qū)補償技術(shù),分析了死區(qū)產(chǎn)生的原因和對系統(tǒng)的影響,重點研究了基于合成電流矢量空間位置的軟件補償方法和基于相電壓檢測的軟硬件結(jié)合補償方法,提出補償實現(xiàn)方法,在實際平臺上進行驗證。 第五部分研究了異步電機的噪聲抑制和振蕩抑制技術(shù),對隨機PWM技術(shù)的理論基礎(chǔ)和實現(xiàn)方法進行了介紹,重點分析和設(shè)計了隨機開關(guān)頻率的隨機PWM技術(shù);分析異步電機低頻輕載振蕩的原因,重點研究了基于無功電流穩(wěn)定的電壓補償方案。對提出的方法在實際平臺上進行了驗證。
[Abstract]:At present, the frequency conversion speed regulation technology is more and more widely used, especially the general frequency control system of asynchronous motor controlled by V / F, widely used in every field of Yu Guomin's life. But the traditional speed regulation system has some problems, such as low sinusoidal current waveform, large noise of motor, easy oscillation of light load current waveform, etc. Therefore, it is of great practical significance to study the key technology of general frequency converter speed regulation system. This paper has carried on the theory research and the application to several key technologies of the universal frequency converter speed regulation system, mainly includes the following contents: the first part has introduced the research background and the significance, This paper analyzes the present research situation and future development trend of inverter at home and abroad, and expounds the source, significance and main contents of the subject. In the second part, the basic theory of general frequency converter is introduced, and the working principle of frequency conversion speed regulation is analyzed. Finally, the structure of general frequency converter is introduced. In the third part, the voltage space vector PWM modulation technology is studied, the different modulation methods are analyzed from the angle of harmonic injection, the realization and calculation methods of various modulation methods are studied, and the software implementation scheme is given. Matlab simulation is carried out and verified on the actual platform. In the fourth part, the dead-time compensation technology of inverter is studied, and the cause of dead-time and its influence on the system are analyzed. The software compensation method based on synthetic current vector space position and the software / hardware compensation method based on phase voltage detection are studied emphatically. The compensation realization method is proposed and verified on the actual platform. In the fifth part, the noise suppression and oscillation suppression techniques of asynchronous motor are studied. The theoretical basis and implementation method of stochastic PWM technology are introduced, and the random PWM technology with random switching frequency is analyzed and designed. The reason of low frequency and light load oscillation of asynchronous motor is analyzed, and the voltage compensation scheme based on reactive current stability is studied. The proposed method is verified on the actual platform.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM921.51

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