【正文】 Regulation System of AC Induction Motor Based on FPGA ABSTRACT Throughout Life in all areas, in terms of the variable speed, the motor speed is mostly used. For DC speed control performance is superior, smooth and good, and it has been the protagonist in the application of speed before. However, DC machines also has its inherent disadvantages: Flimsy brush, cumbersome replace, less stable operation. So people hope to use munication asynchronous motor ,which is more stable and cheaper, to realize speed. Along with the development of power and electronic technology, the desire of using AC induction motor speed has e true. Especially the frequency control receive is paid close attention. Frequency control performance is predominant which even can be pared favourably with the adjusting speed characteristic of DC Motor . The introduction of advanced FPGA and the central control chip is designed. FPGA is the upanding integrated circuitry this year, it has unique advantages: simple, low cost, high speed, power consumption is small, monolithic integration, strong adaptability, facilitate development service and so on. System adopts the special chip SPWM SA4828. SA4828 is large scale integrated circuit dedicated to produce threephase SPWM wave. This paper uses the FPGA to control SA4828 SPWM wave producing threephase inverter circuits to control, so it can realize the threephase ac induction motor speed. Keywords: FPGA， SA4828 Wave Generator， Threephase AC induction motor ， Frequency Control， SPWM 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說明書 第 I 頁 共 Ⅲ 頁 目錄 1 緒論 ............................................................. 1 變頻調(diào)速技術(shù)簡介 ............................................... 1 變頻器的發(fā)展現(xiàn)狀和趨勢 ......................................... 2 變頻器的發(fā)展現(xiàn)狀 ............................................. 2 變頻器技術(shù)的發(fā)展趨勢 ......................................... 2 電力電子技術(shù)的發(fā)展對數(shù)字控制的影響 ............................. 3 研究的目的與意義 ............................................... 5 本次設(shè)計(jì)方案簡介 ............................................... 6 變頻器主電路方案的選定 ....................................... 6 控制電路簡介 ................................................. 7 設(shè)計(jì)說明書的組織結(jié)構(gòu) ......................................... 7 本章小結(jié) ....................................................... 8 2 交流異步電動機(jī) ................................................... 9 交流異步電動機(jī) ................................................. 9 交流異步電動機(jī)的結(jié)構(gòu) ......................................... 9 交流異步電動機(jī)的工作原理 .................................... 11 交流異步電動機(jī)的額定參數(shù) ...................................... 11 交流異步電動機(jī)的工作原理 ...................................... 12 交流異步電動機(jī)的調(diào)速 .......................................... 15 本章小結(jié) ...................................................... 17 3 FPGA 數(shù)字系統(tǒng) .................................................... 18 FPGA 簡介 ...................................................... 18 FPGA 與 CPLD ................................................. 18 FPGA 的結(jié)構(gòu) ................................................. 18 FPGA 的特點(diǎn) .................................................. 20 FPGA 的基本原理 .............................................. 20 FPGA 的設(shè)計(jì)流程 ................................................ 21 開發(fā)工具簡介 .................................................. 22 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說明書 第 II 頁 共 Ⅲ 頁 Verilog HDL 語言 .............................................. 23 Verilog 概述 ................................................. 23 Verilog HDL 的主要能力 ....................................... 23 Verilog 的基本結(jié)構(gòu) ........................................... 25 本章小結(jié) ...................................................... 26 4 SPWM 技術(shù) ........................................................ 27 SPWM 調(diào)制技術(shù)簡介 .............................................. 27 U/f 補(bǔ)償控制方式 ............................................... 29 其它控制方式 .................................................. 31 SPWM 波的生成芯片及其特點(diǎn) ..................................... 32 SA4828 的特點(diǎn) ................................................ 32 SA4828 的管腳及其功能 ........................................ 32 SA4828 內(nèi)部結(jié)構(gòu)及工作原理 .................................... 34 SA4828 的參數(shù)設(shè)置 ............................................ 35 本章小結(jié) ...................................................... 39 5 系統(tǒng)的硬件實(shí)現(xiàn) .................................................. 40 系統(tǒng)的整體設(shè)計(jì) ................................................ 40 系統(tǒng)結(jié)構(gòu)框圖 ................................................ 40 系統(tǒng)整體原理圖 .............................................. 41 主電路 ........................................................ 42 過流保護(hù)電路 .................................................. 44 欠電壓、過電壓保護(hù) ............................................ 44 過電壓保護(hù)電路 .............................................. 45 欠電壓保 護(hù)電路 .............................................. 46 隔離驅(qū)動電路 .................................................. 46 隔離電源 ...................................................... 47 速度反饋 ...................................................... 47 外圍電路 ...................................................... 48 配置電路 .................................................... 49 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說明書 第 III 頁 共 Ⅲ 頁 時(shí)鐘電路 .................................................... 49 復(fù)位電路 .................................................... 50 存儲電路 .................................................... 50 本章小結(jié) ...................................................... 50 6 系統(tǒng)軟件實(shí)現(xiàn) .................................................... 51 控制流程圖 .................................................... 51 實(shí)驗(yàn)結(jié)果 ............................