本文選題：直接轉矩控制 + 模糊邏輯控制　； 參考：《太原科技大學》2014年碩士論文

【摘要】：異步電動機是現(xiàn)代工業(yè)中重要的動力裝置之一,其高性能調速和智能化控制已成為研究熱點。交流電動機的調速技術,經歷了轉速開環(huán)恒壓比控制、轉差頻率控制、磁場定向控制、直接轉矩控制和智能控制等階段。直接轉矩控制在20世紀80年代提出以來,其因控制方式簡潔直接、轉矩響應快速等特點,提高了異步電機的動、靜態(tài)性能,因而受到人們廣泛關注。但由于傳統(tǒng)直接轉矩控制系統(tǒng)中轉矩和磁鏈調節(jié)器采用滯環(huán)比較器,增大了逆變器開關頻率,導致系統(tǒng)產生較大轉矩脈動。在電動汽車驅動控制系統(tǒng)中傳統(tǒng)DTC(Direct Torque Control)技術難以滿足低開關損耗和良好轉矩控制的要求。本文首先從理論基礎出發(fā),介紹了DTC系統(tǒng)基本模塊理論知識,并對各模塊展開理論分析,介紹各模塊彼此之間的關系與影響,為后面章節(jié)的建模仿真準備充足的理論知識和理論依據。其次,本文利用Matlab/Simulink仿真軟件模擬仿真電動汽車驅動控制系統(tǒng)中直接轉矩控制系統(tǒng)的局部各模塊。在此基礎上搭建完整近似圓形磁鏈控制系統(tǒng)的仿真模型,并對仿真結果進行分析,得到電動汽車上應用的直接轉矩控制技術,電動機轉矩脈動大的事實依據。最后,依據模糊理論知識設計了模糊PI轉矩調節(jié)器,搭建出基于模糊邏輯控制技術的直接轉矩控制系統(tǒng),對該系統(tǒng)和傳統(tǒng)直接轉矩控制系統(tǒng)相比較,得到轉矩脈動減少的結論,驗證了模糊邏輯控制的異步電動機直接轉矩控制系統(tǒng)的優(yōu)越性。
[Abstract]:Asynchronous motor is one of the most important power devices in modern industry. Its high performance speed regulation and intelligent control have become a research hotspot. The speed regulation technology of AC motor has gone through the stages of speed open loop constant voltage ratio control, slip frequency control, magnetic field oriented control, direct torque control and intelligent control. Since the direct torque control (DTC) was put forward in the 1980s, it has been paid more attention to because of its simple and direct control mode and fast torque response, which improves the dynamic and static performance of asynchronous motor. However, the hysteresis comparator is used in the traditional direct torque control system, which increases the switching frequency of the inverter and results in a large torque ripple. In the drive control system of electric vehicles, the traditional DTC Direct torque Control (DTC) technology is difficult to meet the requirements of low switching loss and good torque control. In this paper, the theoretical knowledge of the basic modules of DTC system is introduced based on the theoretical basis, and the theoretical analysis of each module is carried out, and the relationship and influence of each module is introduced. Sufficient theoretical knowledge and theoretical basis for the modeling and simulation of the following chapters are prepared. Secondly, this paper uses Matlab / Simulink simulation software to simulate the local modules of direct torque control system in electric vehicle drive control system. On this basis, the simulation model of the approximate circular flux control system is built, and the simulation results are analyzed. The direct torque control technology applied in electric vehicles and the fact basis of the large torque ripple of the motor are obtained. Finally, the fuzzy Pi torque regulator is designed according to the fuzzy theory knowledge, and the direct torque control system based on fuzzy logic control technology is built. Compared with the traditional direct torque control system, the conclusion of torque ripple reduction is obtained. The superiority of direct torque control system of asynchronous motor based on fuzzy logic control is verified.
【學位授予單位】：太原科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM343

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相關期刊論文 前2條

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本文編號：2034448