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  本文關(guān)鍵詞：永磁電機(jī)高頻注入驅(qū)動系統(tǒng)逆變器非線性分析與補(bǔ)償　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 永磁同步電機(jī) 離線參數(shù)辨識 高頻方波注入 逆變器非線性 自適應(yīng)補(bǔ)償

【摘要】：永磁同步電機(jī)因具備高效率、高功率密度及良好動態(tài)性能等優(yōu)點而廣泛應(yīng)用于工業(yè)驅(qū)動、交通運輸、航空航天等領(lǐng)域。無位置傳感器技術(shù)已成為當(dāng)今電機(jī)驅(qū)動方向的研究熱點,由于矢量控制依賴于電機(jī)參數(shù)的準(zhǔn)確性,因此永磁電機(jī)離線參數(shù)辨識對于無傳感器矢量控制器和觀測器設(shè)計十分重要。然而,電機(jī)參數(shù)離線辨識受逆變器非線性的影響,會使得高頻電流響應(yīng)中含有明顯的諧波誤差,從而造成參數(shù)辨識誤差。此外,在基于高頻方波注入的無傳感器控制系統(tǒng)中,逆變器非線性會導(dǎo)致轉(zhuǎn)子位置估計結(jié)果中出現(xiàn)明顯的脈動誤差,進(jìn)而影響電機(jī)解耦的準(zhǔn)確性。為進(jìn)一步提升永磁同步電機(jī)驅(qū)動控制系統(tǒng)性能,本文主要對高頻信號注入的逆變器非線性分析及補(bǔ)償策略進(jìn)行研究。首先分析逆變器非線性對于響應(yīng)電流造成的諧波誤差,并研究高頻加直流復(fù)合信號注入方法抑制逆變器非線性的影響。通過分析考慮逆變器非線性影響下的電機(jī)數(shù)學(xué)模型,研究基于復(fù)合信號注入的參數(shù)離線辨識策略,設(shè)計基于離散傅里葉變換的高頻信號幅值提取方法,從而根據(jù)注入電壓及響應(yīng)電流幅值計算出電感參數(shù)。在此基礎(chǔ)上,針對不同注入信號條件下逆變器非線性影響引起的電流響應(yīng)中的2次和3次諧波分布情況進(jìn)行分析,并驗證其對電感辨識精度的影響。為進(jìn)一步減小參數(shù)辨識誤差,在對逆變器非線性特性進(jìn)行自學(xué)習(xí)的基礎(chǔ)上,提出針對不同相電流條件下逆變器非線性自適應(yīng)補(bǔ)償方法,從而抑制其對參數(shù)辨識的負(fù)面影響。在基于高頻方波注入的永磁同步電機(jī)無位置傳感器控制基礎(chǔ)上,研究通過分離高頻電流包絡(luò)線提取位置特征信息的信號處理方法,并分析逆變器非線性對轉(zhuǎn)子位置觀測器造成的脈動誤差。針對基頻和高頻分量綜合作用引起的負(fù)面影響進(jìn)行研究,通過闡明高頻注入法的零電流鉗位效應(yīng)基礎(chǔ)上,采用改進(jìn)高頻信號注入方式以及信號提取方法來抑制逆變器非線性對無傳感器控制的影響。在理論分析的基礎(chǔ)上,通過Matlab/Simulink仿真工具對所研究的參數(shù)離線辨識方法和基于方波注入的無傳感器控制策略進(jìn)行仿真分析,并在2.2k W內(nèi)置式永磁同步電機(jī)對拖加載實驗平臺上進(jìn)行了試驗驗證,結(jié)果表明了方法的有效性。
[Abstract]:Permanent magnet synchronous motor (PMSM) is widely used in industrial drive, transportation, aerospace and other fields due to its advantages of high efficiency, high power density and good dynamic performance. Sensorless technology has become the research focus of motor drive nowadays. Because vector control depends on the accuracy of motor parameters, the off-line parameter identification of permanent magnet motor is very important for sensorless vector controller and observer design. However, the off-line identification of motor parameters is influenced by the nonlinearity of inverter, which will cause obvious harmonic error in high-frequency current response, resulting in parameter identification error. Besides, in the sensorless control system based on high frequency square wave injection, the nonlinearity of the inverter will lead to the obvious pulsation error in the rotor position estimation result, which will further affect the accuracy of the motor decoupling. In order to further improve the performance of PMSM drive control system, the nonlinear analysis and compensation strategy of high frequency signal injection inverter is mainly studied in this paper. First, the harmonic error caused by the nonlinearity of the inverter is analyzed, and the influence of high-frequency and DC composite signal injection method on the nonlinearity of the inverter is studied. By analyzing the mathematical model of inverter motor considering nonlinear under the influence of the research on off-line parameter identification strategy of composite signal injection based on the extraction method of high frequency signal amplitude based on discrete Fourier transform, which according to the injected voltage and current response amplitude to calculate electric inductance. On this basis, the distribution of 2 and 3 harmonic currents in the current response caused by the nonlinear influence of the inverter under different injection signal conditions is analyzed, and the influence on the inductance identification accuracy is verified. In order to further reduce the parameter identification error, based on the self learning of the inverter's nonlinear characteristics, a nonlinear adaptive compensation method for inverter under different phase currents is put forward, so as to suppress its negative influence on parameter identification. Based on the sensorless control of PMSM Based on high frequency square wave injection, a signal processing method is presented to extract position feature information by separating the high frequency current envelope, and the pulsation error caused by the nonlinearity of the inverter to the rotor position observer is analyzed. Research on negative implications for the comprehensive effect of the fundamental frequency and the high frequency component caused by the zero current clamp of high frequency injection method based on the improved effect, high frequency signal injection method and signal extraction method to suppress the influence of nonlinearity on the inverter sensorless control. On the basis of theoretical analysis, through the Matlab/Simulink simulation tool for off-line parameter identification method based on the research and sensorless control strategy simulation analysis of square wave injection, and 2.2k W in the permanent magnet synchronous motor to drag loading on the experimental platform of experiment, the results show that the effectiveness of the method.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM351;TM464

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本文編號：1340332