本文選題：三電平逆變器 + SVPWM�。� 參考：《東北大學(xué)》2014年碩士論文

【摘要】：隨著電力電子技術(shù)和微處理器技術(shù)的不斷發(fā)展,交流變頻控制技術(shù)得到了迅猛的發(fā)展。但是在中高壓大功率的場合,交流變頻調(diào)速系統(tǒng)的應(yīng)用局限于電力電子器件的耐壓等級和耐受電流。并且由于FPGA器件的快速發(fā)展,使得單獨(dú)采用FPGA完成復(fù)雜的控制算法得以實(shí)現(xiàn),并且FPGA具有處理速度高、可靠性好、可重構(gòu)等優(yōu)點(diǎn),近年來得到了廣泛的應(yīng)用。本文在基于FPGA的三電平逆變器的矢量控制系統(tǒng)上進(jìn)行的研究與設(shè)計(jì)具有重要的實(shí)際應(yīng)用意義。本文以二極管箝位式三電平逆變器為基礎(chǔ)來研究異步電機(jī)轉(zhuǎn)子磁場定向控制。采用FPGA設(shè)計(jì)了一套異步電動機(jī)的矢量控制系統(tǒng)。首先,深入分析了二極管箝位式三電平逆變器的拓?fù)浣Y(jié)構(gòu),介紹了異步電動機(jī)在三相靜止、兩相靜止和兩相旋轉(zhuǎn)坐標(biāo)系下的數(shù)學(xué)模型以及矢量控制的基本思想和基本的PWM算法研究。其次,在分析傳統(tǒng)理想的SPWM和加入死區(qū)的SPWM的基礎(chǔ)上,提出了SPWM無死區(qū)調(diào)制方法,消除了死區(qū)效應(yīng)對輸出波形的影響,提高了逆變器的輸出精度及母線電壓利用率。然后提出了一種改進(jìn)型的三電平SVPWM算法,并分析了死區(qū)對SVPWM的影響,提出了SVPWM無死區(qū)的調(diào)制方法,通過仿真分析驗(yàn)證了無死區(qū)SPWM和無死區(qū)SVPWM方法的正確性。最后在Matlab/Simulink中搭建了矢量控制系統(tǒng)的仿真模型,仿真結(jié)果表明控制系統(tǒng)具有很好的動態(tài)響應(yīng)和穩(wěn)態(tài)精度。并完成了以EP4CE10E22C8為核心的控制系統(tǒng)的軟、硬件設(shè)計(jì),并在實(shí)驗(yàn)平臺上進(jìn)行空載和負(fù)載突變的實(shí)驗(yàn)研究,實(shí)驗(yàn)結(jié)果具有良好的動態(tài)和靜態(tài)性能,證明了系統(tǒng)具有較高的實(shí)際應(yīng)用價(jià)值。
[Abstract]:With the continuous development of power electronics and microprocessor technology, AC frequency conversion control technology has been rapid development. However, the application of AC variable-frequency speed regulation system is limited to the voltage tolerance and current tolerance of power electronic devices in the situation of medium high voltage and high power. Because of the rapid development of FPGA devices, the complex control algorithm can be realized by using FPGA alone, and FPGA has many advantages such as high processing speed, good reliability and reconfigurable, so it has been widely used in recent years. The research and design of three-level inverter vector control system based on FPGA has important practical significance. Based on diode-clamped three-level inverter, the rotor field-oriented control of asynchronous motor is studied in this paper. A vector control system of asynchronous motor is designed with FPGA. First of all, the topology of diode clamped three-level inverter is deeply analyzed, and the asynchronous motor at three-phase static is introduced. The mathematical model of two-phase stationary and two-phase rotating coordinate system, the basic idea of vector control and the basic PWM algorithm are studied. Secondly, based on the analysis of the traditional ideal SPWM and the SPWM with dead-time, a dead-time modulation method for SPWM is proposed, which eliminates the effect of dead-time effect on the output waveform and improves the output precision and bus voltage utilization ratio of the inverter. Then, an improved three-level SVPWM algorithm is proposed, and the influence of dead-time on SVPWM is analyzed, and the SVPWM no-dead-time modulation method is proposed. The simulation results show that the dead-time SPWM and dead-time SVPWM methods are correct. Finally, the simulation model of vector control system is built in Matlab/Simulink. The simulation results show that the control system has good dynamic response and steady-state precision. The software and hardware design of the control system with EP4CE10E22C8 as the core is completed, and the experimental research on no-load and load mutation is carried out on the experimental platform. The experimental results have good dynamic and static performance. It is proved that the system has high practical application value.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM464

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