本文選題：無差拍直接轉(zhuǎn)矩控制 + 模型預(yù)測轉(zhuǎn)矩控制��； 參考：《北方工業(yè)大學(xué)》2017年碩士論文

【摘要】：永磁同步電機(jī)(permanent magnet synchronous motor,PMSM)因其具有高效率、高功率密度與高功率因數(shù)等優(yōu)點(diǎn),在各個領(lǐng)域均得到了推廣應(yīng)用。目前,廣泛采用的高性能PMSM控制技術(shù)主要有矢量控制和直接轉(zhuǎn)矩控制。直接轉(zhuǎn)矩控制以電磁轉(zhuǎn)矩和定子磁鏈作為直接控制目標(biāo),無需電流調(diào)節(jié)器和坐標(biāo)變換。具有結(jié)構(gòu)簡單、動態(tài)響應(yīng)快等優(yōu)點(diǎn)。但直接轉(zhuǎn)矩控制存在轉(zhuǎn)矩脈動大的缺點(diǎn),需要較高采樣頻率才能保證其較好的穩(wěn)態(tài)性能。為了進(jìn)一步提高直接轉(zhuǎn)矩控制系統(tǒng)性能,本文在傳統(tǒng)預(yù)測轉(zhuǎn)矩控制基礎(chǔ)上,提出了兩種優(yōu)化控制方法。首先,為了減小電機(jī)參數(shù)擾動對無差拍直接轉(zhuǎn)矩控制(deadbeat direct torque control,DBDTC)計(jì)算參考電壓矢量的影響,本文提出一種基于滑模擾動觀測器(sliding mode disturbance observer,SMDO)的 PMSM 無差拍直接轉(zhuǎn)矩控制方法(DBDTC+SMDO)。此方法通過構(gòu)建d、q軸SMDO對電機(jī)參數(shù)(定子相電阻、電感和永磁體磁鏈)擾動所導(dǎo)致的參考電壓變化量進(jìn)行觀測。利用觀測值對電機(jī)參數(shù)擾動進(jìn)行辨識和補(bǔ)償,不僅大大減小了電機(jī)參數(shù)擾動對計(jì)算參考電壓矢量的影響,而且提高了 DBDTC對參數(shù)擾動的魯棒性。其次,為了減少傳統(tǒng)模型預(yù)測轉(zhuǎn)矩控制(model predictive torque control,MPTC)的計(jì)算量并消除轉(zhuǎn)矩和磁鏈之間的權(quán)重系數(shù),本文提出一種基于參考電壓追蹤誤差(reference voltage tracking error,RVTE)的PMSM模型預(yù)測轉(zhuǎn)矩控制方法(MPTC+RVTE)。此方法利用DBDTC控制原理計(jì)算下一周期預(yù)施加的參考電壓矢量。根據(jù)參考電壓矢量所處扇區(qū)位置,縮小最優(yōu)電壓矢量選擇范圍,從而達(dá)到減小計(jì)算量的目的。并在其基礎(chǔ)上,電壓誤差代價函數(shù)取代傳統(tǒng)轉(zhuǎn)矩誤差與磁鏈誤差所構(gòu)成的代價函數(shù),消除了傳統(tǒng)MPTC的權(quán)重系數(shù)設(shè)計(jì),簡化了系統(tǒng)結(jié)構(gòu)。本文不僅將MPTC+RVTE方法應(yīng)用在單矢量MPTC中,又?jǐn)U展應(yīng)用在雙矢量MPTC中。最后,分別對DBDTC+SMDO與傳統(tǒng)DBDTC,MPTC+RVTE與傳統(tǒng)MPTC進(jìn)行了仿真和實(shí)驗(yàn)。仿真和實(shí)驗(yàn)結(jié)果證明了所提方法的正確性和有效性。
[Abstract]:Permanent magnet synchronous motor (PMSM) has been widely used in various fields because of its high efficiency, high power density and high power factor. At present, the widely used high performance PMSM control technology mainly includes vector control and direct torque control. Direct torque control (DTC) takes electromagnetic torque and stator flux as the direct control target without current regulator and coordinate transformation. It has the advantages of simple structure and fast dynamic response. However, direct torque control (DTC) has the disadvantage of large torque ripple, which requires a high sampling frequency to ensure its good steady-state performance. In order to further improve the performance of direct torque control system, this paper proposes two optimal control methods based on the traditional predictive torque control. Firstly, in order to reduce the effect of motor parameter disturbance on the deadbeat direct torque control (DBDTC) calculation reference voltage vector, this paper presents a novel PMSM deadbeat direct torque control method based on sliding mode disturbance observer SMDO (sliding mode disturbance observer). In this method, the reference voltage variation caused by the disturbance of stator phase resistance, inductance and permanent magnet flux is observed by constructing dq-axis SMDO. The effect of parameter disturbance on the reference voltage vector is greatly reduced and the robustness of DBDTC to the parameter disturbance is improved by using the observed values to identify and compensate the parameter disturbance of the motor. Secondly, in order to reduce the computational complexity of the traditional predictive torque control model predictive torque control system and eliminate the weight coefficient between the torque and flux, a PMSM model predictive torque control method based on reference voltage tracking error (reference voltage tracking error) is proposed in this paper. The DBDTC control principle is used to calculate the reference voltage vector pre-applied in the next period. According to the sector position of the reference voltage vector, the selection range of the optimal voltage vector is reduced so as to reduce the amount of calculation. On the basis of it, the cost function of voltage error replaces the cost function of traditional torque error and flux error, which eliminates the weight coefficient design of traditional MPTC and simplifies the system structure. In this paper, MPTC RVTE method is not only applied to single vector MPTC, but also extended to double vector MPTC. Finally, the simulation and experiment of DBDTC SMDO and traditional DBDTCU MPTC RVTE and traditional MPTC are carried out. Simulation and experimental results show that the proposed method is correct and effective.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM341

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