本文選題：異步電動(dòng)機(jī)　切入點(diǎn)：矢量控制　出處：《濟(jì)南大學(xué)》2017年碩士論文

【摘要】：異步電動(dòng)機(jī)在工業(yè)、交通運(yùn)輸業(yè)等領(lǐng)域是主要?jiǎng)恿υO(shè)備。社會(huì)快速發(fā)展能源和環(huán)境問(wèn)題備受關(guān)注,變頻調(diào)速技術(shù)可以使電動(dòng)機(jī)節(jié)能運(yùn)行,起到節(jié)約能源的作用。電動(dòng)機(jī)通常都是在額定恒勵(lì)磁方式下運(yùn)行,當(dāng)電動(dòng)機(jī)負(fù)載較輕時(shí)額定恒磁鏈控制會(huì)使異步電動(dòng)機(jī)效率降低。所以研究提高異步電動(dòng)機(jī)變頻調(diào)速系統(tǒng)運(yùn)行效率具有重要的理論與實(shí)際應(yīng)用意義。本文以異步電動(dòng)機(jī)變頻調(diào)速矢量控制系統(tǒng)為對(duì)象,研究其效率優(yōu)化控制方法,提高運(yùn)行效率。主要完成以下工作:在研究異步電動(dòng)機(jī)的數(shù)學(xué)模型基礎(chǔ)上,建立考慮定子鐵損的異步電動(dòng)機(jī)動(dòng)態(tài)數(shù)學(xué)模型,對(duì)相對(duì)應(yīng)的矢量控制系統(tǒng)進(jìn)行了仿真建模,研究變頻調(diào)速矢量控制系統(tǒng)穩(wěn)態(tài)性能和動(dòng)態(tài)性能的跟隨性、抗擾性。分析異步電動(dòng)機(jī)效率優(yōu)化原理,對(duì)目前常采用的幾種效率優(yōu)化控制策略進(jìn)行了研討,包括:基于損耗模型法效率優(yōu)化控制策略、基于最小定子電流效率優(yōu)化控制策略和基于最小輸入功率在線搜索效率優(yōu)化控制策略。其中,對(duì)基于損耗模型法效率優(yōu)化控制策略進(jìn)行了詳細(xì)的仿真實(shí)驗(yàn)研究。建立損耗模型,推導(dǎo)出可以實(shí)現(xiàn)效率最優(yōu)的轉(zhuǎn)子磁鏈,驗(yàn)證系統(tǒng)在最優(yōu)轉(zhuǎn)子磁鏈狀態(tài)下運(yùn)行時(shí)效率優(yōu)化的良好效果。研究了基于模糊搜索法的效率優(yōu)化控制策略,即應(yīng)用模糊控制技術(shù)通過(guò)搜索最優(yōu)轉(zhuǎn)子磁鏈給定值,使電動(dòng)機(jī)的輸入功率最小,達(dá)到效率最優(yōu)。設(shè)計(jì)了模糊控制器,對(duì)控制系統(tǒng)進(jìn)行了仿真建模,進(jìn)行了仿真實(shí)驗(yàn)研究。實(shí)驗(yàn)結(jié)果表明模糊搜索法尋優(yōu)結(jié)果準(zhǔn)確,能明顯降低輸入功率,提高系統(tǒng)運(yùn)行效率,實(shí)現(xiàn)電動(dòng)機(jī)節(jié)能運(yùn)行。提出一種損耗模型法和模糊搜索法混合效率優(yōu)化控制策略。實(shí)現(xiàn)了損耗模型法和模糊搜索法的優(yōu)缺點(diǎn)互補(bǔ),并進(jìn)行仿真實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明新的控制策略使尋優(yōu)結(jié)果更加準(zhǔn)確、尋優(yōu)時(shí)間變短。因?yàn)镈SP可以方便快速實(shí)現(xiàn)復(fù)雜控制算法,所以具有復(fù)雜控制算法的矢量控制系統(tǒng)通常采用DSP設(shè)計(jì)實(shí)現(xiàn)。針對(duì)這個(gè)問(wèn)題,本論文闡述了借助RTW工具把效率優(yōu)化控制算法的Simulink仿真模型轉(zhuǎn)化成C代碼的實(shí)現(xiàn)方法,使所提出的效率優(yōu)化算法可應(yīng)用到DSP矢量控制系統(tǒng)中。
[Abstract]:Asynchronous motor in industrial, transportation and other fields is the main power equipment. The rapid development of social energy and environmental issues of concern, VVVF technology can make the energy saving operation of the motor, play a role in energy conservation. The motor is usually run at rated constant excitation mode, when the motor light load constant rated flux control will the efficiency of the asynchronous motor is reduced. So research has important theoretical and practical significance to improve the efficiency of the induction motor control system. In this paper, motor frequency vector control system for asynchronous object, studies the efficiency optimization control method, improve the operation efficiency. Mainly completes the following work: in the mathematical model of asynchronous motor based on the establishment of the dynamic mathematical model of induction motor considering iron loss of stator, the corresponding vector control system simulation modeling Study on control system, follow the steady-state performance and dynamic performance of frequency control vector, immunity analysis. The principle of efficiency optimization of induction motor, including the commonly used several kinds of efficiency optimization control strategy discussed: loss model method of efficiency optimization control strategy based on control strategy and online search efficiency optimization control minimum input power efficiency optimization strategy based on minimum stator current. Based on which, the control strategy optimization method based on efficiency loss model simulation. With the establishment of the loss model, the rotor flux is derived can achieve optimal efficiency, good results verify the system running in the optimal rotor flux condition. The efficiency optimization of efficiency optimization control strategy the fuzzy search method based on the application of fuzzy control technology by searching the optimal rotor flux reference value, the input power of the motor Minimum rate, achieve optimal efficiency. The design of fuzzy controller, the control system of simulation modeling, simulation experiments are done. The experimental results show that the fuzzy optimization search method is accurate, can significantly reduce the input power, and improve the system efficiency, the realization of motor operation. Put forward a kind of energy loss model method and fuzzy search control efficiency optimization method of mixed strategy. The loss model and the complementary advantages and disadvantages of the fuzzy search method, and carries on the simulation experiment. The experimental results show that the new control strategy to make search results more accurate, the search time is shorter. Because DSP can easily and quickly realize the complex control algorithm, so the vector control algorithm of complex control system usually designed with DSP. To solve this problem, this paper describes the efficiency optimization by means of RTW simulation model of Simulink control algorithm into C code. In the present method, the proposed efficiency optimization algorithm can be applied to the DSP vector control system.

【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM343;TP273

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