【摘要】：智能控制理論正在經(jīng)歷蓬勃發(fā)展,快速學(xué)習(xí)的能力解放了繁雜的人為調(diào)試,對(duì)永磁同步電機(jī)智能控制系統(tǒng)的研究一直是領(lǐng)域內(nèi)的熱門。本文針對(duì)多相電機(jī)驅(qū)動(dòng)系統(tǒng)的特點(diǎn),提出一種效率高、反應(yīng)靈敏、動(dòng)態(tài)性能穩(wěn)定的控制算法,并且將算法運(yùn)用于六相電機(jī)矢量控制系統(tǒng)中。通過仿真結(jié)果看出該算法設(shè)計(jì)的控制器提高了控制系統(tǒng)的響應(yīng)速度與精度,證明改進(jìn)后的算法具有更強(qiáng)的適應(yīng)性和魯棒性。主要研究內(nèi)容如下:(1)從結(jié)構(gòu)分析相移電30°的六相永磁同步電機(jī),包括在自然靜止坐標(biāo)系、α-β坐標(biāo)系和d-q坐標(biāo)系下的磁鏈方程、電壓方程、轉(zhuǎn)矩方程和運(yùn)動(dòng)方程。采用一種新式的坐標(biāo)變換方法用于矢量解耦,重新構(gòu)造適合在矢量控制系統(tǒng)中使用的斷相運(yùn)行狀態(tài)下的電機(jī)模型。(2)主要以i_d=0原理構(gòu)建六相永磁電機(jī)的空間矢量控制系統(tǒng)。分別研究了兩矢量合成的兩電平六相空間矢量調(diào)制策略和五矢量合成的三電平六相空間矢量調(diào)制策略。根據(jù)這些矢量在α-β和x-y平面的不同效果對(duì)冗雜的空間矢量進(jìn)行精簡,選擇可以消除x-y平面諧波的五矢量作為基本合成矢量,達(dá)到合成參考電壓矢量并消除5、7、17、19…次諧波電壓的目的。為了解決三電平逆變器出現(xiàn)的中點(diǎn)電位偏移問題,對(duì)矢量作用順序進(jìn)行優(yōu)化。(3)引入適應(yīng)度方差因子對(duì)粒子群算法的權(quán)重系數(shù)更新進(jìn)行優(yōu)化,加快了收斂速度,避免迭代出現(xiàn)早熟現(xiàn)象;在保留3層網(wǎng)絡(luò)之間的權(quán)值系數(shù)的基礎(chǔ)上,增加了PID轉(zhuǎn)移系數(shù),優(yōu)化了PID神經(jīng)網(wǎng)絡(luò)結(jié)構(gòu),使函數(shù)擬合能力更完善;對(duì)直接啟發(fā)式動(dòng)態(tài)規(guī)劃進(jìn)行了改進(jìn),根據(jù)優(yōu)化PID神經(jīng)網(wǎng)絡(luò)搭建動(dòng)作網(wǎng)絡(luò)和評(píng)價(jià)網(wǎng)絡(luò),采用改進(jìn)的粒子群算法對(duì)網(wǎng)絡(luò)權(quán)值進(jìn)行優(yōu)化更新。改進(jìn)算法避免了計(jì)算一階導(dǎo)數(shù),減小了計(jì)算量,優(yōu)化了收斂性和魯棒性(4)用改進(jìn)的自適應(yīng)動(dòng)態(tài)規(guī)劃算法設(shè)計(jì)速度、電流控制器,加入到六相永磁同步電機(jī)的矢量控制系統(tǒng)。自適應(yīng)控制器根據(jù)反饋量與目標(biāo)值的誤差自發(fā)更新控制參數(shù)并輸出控制信號(hào),由三電平六相逆變器發(fā)出交流電完成對(duì)電機(jī)的調(diào)節(jié)。用傳統(tǒng)自適應(yīng)動(dòng)態(tài)規(guī)劃設(shè)計(jì)的控制器作為比較,實(shí)驗(yàn)結(jié)果證明改進(jìn)算法有更好的靈敏性、動(dòng)態(tài)特性和抗干擾能力。
[Abstract]:Intelligent control theory is undergoing vigorous development, the ability of rapid learning has liberated the complicated artificial debugging, and the research of PMSM intelligent control system has been a hot topic in the field. According to the characteristics of multiphase motor drive system, this paper presents a control algorithm with high efficiency, sensitive response and stable dynamic performance. The algorithm is applied to the vector control system of six-phase motor. The simulation results show that the controller designed by this algorithm improves the response speed and precision of the control system, and proves that the improved algorithm has stronger adaptability and robustness. The main contents are as follows: (1) the structure analysis of six-phase permanent magnet synchronous motor with phase shift of 30 擄includes flux equation, voltage equation, torque equation and motion equation in natural static coordinate system, 偽-尾 coordinate system and d-q coordinate system. A new coordinate transformation method is used for vector decoupling to reconstruct the motor model which is suitable for use in vector control system. (2) the space vector control system of six-phase permanent magnet motor is constructed based on i_d=0 principle. The two-level six-phase space vector modulation strategy and the three-level six-phase space vector modulation strategy are studied respectively. According to the different effects of these vectors in 偽-尾 and x-y planes, the jumbled space vectors are simplified, and five vectors which can eliminate the x-y plane harmonics are selected as the basic synthesis vectors to achieve the synthetic reference voltage vector and to eliminate the 5 ~ (-) ~ 71719 ~ (-) 鈥，

本文編號(hào)：2182236