【摘要】：永磁同步單機具有高功率密度,高效率等優(yōu)點在工業(yè)領(lǐng)域扮演重要角色。無位置傳感器驅(qū)動技術(shù)可以降低成本并且提高系統(tǒng)可靠性,近年來已成為研究熱點。高頻信號注入法是低速區(qū)的較有效的無傳感器控制技術(shù)。然而,該方法會引起高頻噪音和電磁兼容問題,致使該方法在使用場合上受到限制。因此,高頻信號注入法需要結(jié)合相應(yīng)的降噪策略以降低其負(fù)面影響。本文針對可降低高頻噪音的隨機頻率電壓注入法進(jìn)行了研究。首先分析了傳統(tǒng)高頻信號注入法的基本原理。建立永磁同步電機高頻數(shù)學(xué)模型,在高頻電壓的激勵下,電機繞組可以簡化為純電感模型。內(nèi)置式永磁同步電機具有凸極特性,使其高頻電流響應(yīng)中含有轉(zhuǎn)子位置信息,通過合理的信號處理方式可以得到電機轉(zhuǎn)子位置,從而實現(xiàn)電機無傳感器控制。第二章分析了高頻方波電壓注入法和高頻正弦波電壓注入法的基本原理,并通過Matlab/Simulink軟件對兩種方法進(jìn)行了驗證。在上述分析結(jié)果的基礎(chǔ)上,本文對隨機頻率電壓信號注入法進(jìn)行研究。傳統(tǒng)高頻信號注入法使用固定頻率注入信號,使其電流功率譜密度過于集中,因此產(chǎn)生的噪音尖銳刺耳。使用頻率隨機變換的電壓信號可以有效拓展并降低電流的頻譜分布�；谝陨显�,本文研究了隨機頻率電壓注入法轉(zhuǎn)子位置提取方式。針對高頻注入法受數(shù)字系統(tǒng)延時影響機理進(jìn)行了分析,并提出了相應(yīng)的解決策略。從電流功率譜密度的角度對傳統(tǒng)固定頻率注入法和隨機頻率注入法進(jìn)行比較分析。盡管隨機頻率注入法可以有效降低噪音問題,但其電流功率譜密度仍然存在離散譜成分,即仍有集中分布的頻率成分。本文從理論上分析了離散譜產(chǎn)生的原因,并提出了相應(yīng)的解決優(yōu)化策略。實驗結(jié)果和理論分析結(jié)果吻合,皆證明半周期切換隨機頻率注入法降低噪音的有效性。最后,通過基于ARM的永磁同步電機實驗平臺對本文研究內(nèi)容進(jìn)行了實驗驗證。實驗表明,隨機頻率電壓注入法可以有效拓展電流功率密度譜,使噪音得到降低。同時,該方法可以較準(zhǔn)確的估計電機的位置以及轉(zhuǎn)速信息,保證電機控制性能。
[Abstract]:Permanent magnet synchronous single machine plays an important role in industry because of its high power density and high efficiency. Position sensorless driving technology can reduce the cost and improve the reliability of the system, which has become a hot research topic in recent years. High frequency signal injection is an effective sensorless control technique in low speed region. However, this method will cause high frequency noise and electromagnetic compatibility problems, which limits the use of this method. Therefore, the high frequency signal injection method needs to combine the corresponding de-noising strategy to reduce its negative impact. The random frequency voltage injection method which can reduce high frequency noise is studied in this paper. Firstly, the basic principle of the traditional high frequency signal injection method is analyzed. The high frequency mathematical model of permanent magnet synchronous motor is established. Under the excitation of high frequency voltage, the winding of permanent magnet synchronous motor can be simplified to pure inductance model. The built-in permanent magnet synchronous motor (PMSM) has salient pole characteristic and contains rotor position information in its high frequency current response. The rotor position of the motor can be obtained by means of reasonable signal processing, thus the sensorless control of the motor can be realized. In the second chapter, the basic principles of the high frequency square wave voltage injection method and the high frequency sine wave voltage injection method are analyzed, and the two methods are verified by Matlab/Simulink software. On the basis of the above analysis results, the random frequency and voltage signal injection method is studied in this paper. The traditional high frequency signal injection method uses fixed frequency injection signal, which makes the current power spectrum density too concentrated, so the noise is sharp and harsh. The voltage signal with random frequency transformation can effectively expand and reduce the frequency distribution of the current. Based on the above principles, the method of rotor position extraction by random frequency voltage injection is studied in this paper. In this paper, the influence mechanism of high frequency injection method on digital system delay is analyzed, and the corresponding solving strategy is put forward. The traditional fixed frequency injection method and random frequency injection method are compared and analyzed from the angle of current power spectral density. Although the random frequency injection method can effectively reduce the noise problem, there is still a discrete spectral component in the current power spectral density, that is, there is still a centralized distribution of the frequency component in the current power spectral density. In this paper, the reasons for the generation of discrete spectrum are analyzed theoretically, and the corresponding optimization strategies are put forward. The experimental results are in good agreement with the results of theoretical analysis. It is proved that the half-period switching random frequency injection method is effective in reducing noise. Finally, the research content of this paper is verified by the experiment platform of permanent magnet synchronous motor based on ARM. The experimental results show that the random frequency voltage injection method can effectively expand the current power density spectrum and reduce the noise. At the same time, this method can accurately estimate the motor position and speed information, and ensure the motor control performance.
【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】：2017
【分類號】：TM351

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 杜博超;韓守亮;張超;崔淑梅;鄭維;;基于自抗擾控制器的內(nèi)置式永磁同步電機無位置傳感器控制[J];電工技術(shù)學(xué)報;2017年03期

2 吳春;齊蓉;李兵強;馬冬麒;;考慮飽和效應(yīng)的永磁同步電機全程無位置傳感器控制[J];電工技術(shù)學(xué)報;2017年02期

3 年珩;賀益康;黃雷;;永磁同步電機無位置傳感器運行場路耦合分析[J];中國電機工程學(xué)報;2008年18期

4 張猛;肖曦;李永東;;基于擴展卡爾曼濾波器的永磁同步電機轉(zhuǎn)速和磁鏈觀測器[J];中國電機工程學(xué)報;2007年36期

5 王麗梅,田明秀,鄭建芬;基于觀測器的永磁電機轉(zhuǎn)子位置和速度估計方法[J];沈陽工業(yè)大學(xué)學(xué)報;2005年02期

6 秦峰,賀益康,劉毅,章瑋;兩種高頻信號注入法的無傳感器運行研究[J];中國電機工程學(xué)報;2005年05期

相關(guān)碩士學(xué)位論文 前3條

1 齊江博;無電解電容空調(diào)永磁壓縮機驅(qū)動系統(tǒng)高功率因數(shù)控制[D];哈爾濱工業(yè)大學(xué);2016年

2 王瑩;基于載頻信號注入的永磁電機無傳感控制策略研究[D];哈爾濱工業(yè)大學(xué);2016年

3 林燕強;永磁同步電動機無傳感器矢量控制研究[D];浙江大學(xué);2016年

，

本文編號：2435167