本文關鍵詞：基于SMO的永磁同步電機無傳感器控制研究　出處：《中國礦業(yè)大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 永磁同步電動機 無傳感器控制 滑模觀測器 卡爾曼 鎖相環(huán)

【摘要】：永磁同步電機(PMSM)相較直流電機、異步電機、電勵磁同步電機等常見電機具有體積小、功率密度及效率高等優(yōu)點,在伺服控制系統(tǒng)中扮演著越來越重要的角色。無傳感器控制系統(tǒng)相較有位置系統(tǒng)具有獨特的優(yōu)點,近年來成為學者研究的熱點,其控制的難點在于轉子初始角度估測、低速區(qū)轉速和轉子位置的估計。本文構建了一套以滑模觀測器為核心的無速度傳感器矢量控制系統(tǒng),對上述問題提出解決方法,討論了無速度控制系統(tǒng)中的一些問題。主要有如下幾個方面:推導了永磁同步電機在靜止和同步旋轉這兩種坐標系下的數(shù)學模型,在此基礎上構建了永磁同步電機的常規(guī)矢量控制系統(tǒng),并研究分析了電壓前饋電流補償?shù)氖噶靠刂品椒?搭建了仿真模型。闡述了滑模觀測器的基本原理,在此基礎上構建了永磁同步電機在靜止坐標系下的滑模觀測器,并將其類推到了同步旋轉坐標系下,并對其進行了MATLAB/Simulink仿真分析驗證,構建的同步旋轉坐標系下的滑模觀測器能很好地估測轉速和轉子位置。然后,給出了靜止坐標系和同步旋轉坐標系下選擇的判斷依據(jù)。分析了滑模觀測器的“抖動”,對傳統(tǒng)滑模觀測器進行了改進。將傳統(tǒng)滑模的符號函數(shù)用Sigmoid取代;將傳統(tǒng)固定截止頻率的低通濾波器改造為變截止頻率的低通濾波器,以使補償角度變?yōu)槎ㄖ?減輕控制器查表時間開銷;對估測濾波后的反電動勢進行二次卡爾曼濾波;將反正切提取轉子角度的方法用鎖相環(huán)取代。這些改進方法能有效減小估測轉速和轉子位置的“抖動”。設計開發(fā)了一套以DSP28335及旋風2系列FPGA為核心的控制系統(tǒng)。分析了系統(tǒng)的控制板、功率板、采集板構建中的問題。分析了三電阻法采樣中的電流采樣問題,探討了電流采樣時刻確定的問題。開發(fā)了一套人機交互觸摸屏系統(tǒng)及完成永磁同步電機無傳感器控制的軟件系統(tǒng)。最后在開發(fā)平臺上進行了相關實驗,完成了基于滑模觀測器的無位置傳感器調速系統(tǒng)設計。
[Abstract]:Permanent magnet synchronous motor (PMSM) compared with DC motor, induction motor, electric motor and other common excitation synchronous motor has the advantages of small volume, power density and high efficiency, plays an increasingly important role in the servo control system. Sensorless control system with position system has unique advantages, in recent years become the focus of scholars the research, its control is difficult to estimate the initial rotor angle, low velocity zone speed and rotor position estimation. This paper constructs a set of the sliding mode observer as the core of the speed sensorless vector control system, proposes the solutions to the problems, discusses some problems of speed control system. The main are as follows mathematical model in stationary and synchronous rotation of the two coordinates of the permanent magnet synchronous motor is derived, based on the conventional vector control system of permanent magnet synchronous motor The research and analysis, the vector voltage feedforward current compensation control method, simulation model is built. Describes the basic principle of sliding mode observer, based on permanent magnet synchronous motor in the stationary coordinate sliding mode observer, and the analogy to the synchronous rotating coordinate system, and has carried on the MATLAB/Simulink simulation results show that the sliding mode observer of the synchronous rotating coordinate system can well estimate the rotor position and speed. Then, given the judgement on the basis of static coordinate and synchronous rotating coordinate selection. Analysis of the sliding mode observer "jitter", the traditional sliding mode observer is improved. The symbolic function of traditional sliding mode the Sigmoid is used to replace the low-pass filter; the transformation of traditional fixed cut-off frequency of the low-pass filter variable cut-off frequency, so that the compensation angle to a fixed value, reduce the look-up table when controller The overhead of back EMF; two Calman filter estimation after filtering; the arctangent replaced by phase-locked loop method of rotor angle extraction. The improved method can effectively reduce the estimation of the rotor position and speed of the "jitter". Designed and developed a set of DSP28335 control system and the cyclone 2 series FPGA as the core analysis of the control board, power board system, the problems in the construction of the acquisition board. Analysis of the current three resistance sampling method in sampling problem, discusses the problem of determining the current sampling time. To develop a set of interactive touch screen system and software system of permanent magnet synchronous motor without sensor control. At the end of the experiments in the development platform, completed the design of sensorless control system based on sliding mode observer.

【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM341

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相關碩士學位論文 前1條

1 王海垠;基于高頻信號注入法的永磁同步電機無傳感器控制[D];西安理工大學;2008年

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本文編號：1417267