本文關(guān)鍵詞：雙三相電機矢量控制及容錯控制策略研究　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 雙三相永磁同步電機 矢量空間解耦 比例諧振控制 雙同步旋轉(zhuǎn)坐標(biāo)變換 不對稱運行 MATLAB仿真 DSP2812

【摘要】：本文研究的雙三相永磁同步電機同時具有永磁電機與雙三相電機的優(yōu)點。雙三相永磁同步電機是一個非線性,強耦合、多變量的系統(tǒng)。本文首先采用空間矢量解耦方法,建立了同步旋轉(zhuǎn)坐標(biāo)系下的電機數(shù)學(xué)模型,采用isd=0進(jìn)行磁場定向控制。針對矢量空間解耦技術(shù)對zl-z2子平面諧波電流分量控制的不足,本文采用比例諧振控制器對該平面具有較大幅值的電流諧波分量進(jìn)行直接而有效的控制,并給出了相應(yīng)的SVPWM方法,同時實現(xiàn)a-β子平面和zl-z2子平面的優(yōu)化控制策略,有效地抑制了定子諧波電流,減小了系統(tǒng)損耗。同時,基于雙三相電機的繞組結(jié)構(gòu)特點,提出了基于雙同步坐標(biāo)變換的雙三相電機矢量控制策略,采用解耦補償?shù)姆椒ㄊ箖商桌@組分別解耦獨立控制。給出兩種電流控制策略消除因分開控制引起的繞組間不平衡電流。本文還推導(dǎo)分析了以上兩種矢量控制之間的內(nèi)在聯(lián)系,兩者最大區(qū)別在于采用雙同步坐標(biāo)變換的矢量控制在控制原理上對與機電能量轉(zhuǎn)換無關(guān)的zl-z2子平面電流諧波分量有直接有效的控制,仿真結(jié)果驗證以上結(jié)論。 本文分別從定子繞組磁勢不變和用改進(jìn)旋轉(zhuǎn)坐標(biāo)變換實現(xiàn)不對稱電機的解耦控制兩個角度出發(fā),介紹了多雙三相電機在不對稱運行時的兩種容錯控制方法。重點研究了不對稱運行時的新型坐標(biāo)變換方法,提出一種將不對稱的系統(tǒng)等效為對稱系統(tǒng)的等效坐標(biāo)變換,實現(xiàn)不對稱雙三相電機的解耦控制,獲得與直流他勵電動機相似的控制性能。最后,仿真研究表明,該策略能夠有效的減小缺相運行時電磁轉(zhuǎn)矩的脈動,實現(xiàn)了缺相運行時磁場定向解耦控制。 最后,設(shè)計了基于TI公司的TMS320LF2812數(shù)字信號處理器的雙三相永磁電機實驗平臺,對其硬件和軟件系統(tǒng)分別做了介紹。并對本文的研究內(nèi)容進(jìn)行了實驗驗證。
[Abstract]:The double three phase permanent magnet synchronous motor studied in this paper has the advantages of both the permanent magnet motor and the double three phase motor. The double three phase permanent magnet synchronous motor is a nonlinear and strongly coupled motor. In this paper, the mathematical model of motor in synchronous rotating coordinate system is established by using the method of space vector decoupling. In this paper, isd=0 is used to control the magnetic field orientation and the vector space decoupling technique is used to control the harmonic current component of the zl-z2 subplane. In this paper, the proportional resonance controller is used to directly and effectively control the current harmonic component with large amplitude in the plane, and the corresponding SVPWM method is given. The optimal control strategy of a- 尾 subplane and zl-z2 subplane is realized at the same time, which effectively restrains the stator harmonic current and reduces the system loss. At the same time, based on the characteristics of the winding structure of the two-phase motor. A vector control strategy for dual three phase motor based on double synchronous coordinate transformation is proposed. The decoupling compensation method is used to separate the two sets of windings separately and independently. Two current control strategies are given to eliminate the unbalanced current between the windings caused by the separate control. The paper also deduces and analyzes the relationship between the two kinds of vector control. The inner link. The biggest difference between the two is that the vector control with double synchronous coordinate transformation has direct and effective control on the harmonic component of zl-z2 subplane current which is independent of electromechanical energy conversion in the control principle. The simulation results verify the above conclusions. In this paper, the stator winding magnetic potential is invariant and the decoupling control of asymmetric motor is realized by improved rotation coordinate transformation. This paper introduces two fault-tolerant control methods for multi-double three-phase motor in asymmetric operation, and focuses on the new coordinate transformation method in asymmetric operation. This paper presents an equivalent coordinate transformation from an asymmetric system to a symmetric system, and realizes decoupling control of asymmetric two-three-phase motor. The control performance is similar to that of DC shunt motor. Finally, the simulation results show that the decoupling control is similar to that of DC shunt motor. This strategy can effectively reduce the ripple of electromagnetic torque in the absence of phase, and realize the field-oriented decoupling control in the absence of phase. Finally, a dual-three-phase permanent magnet motor experimental platform based on TI's TMS320LF2812 digital signal processor is designed. The hardware and software system are introduced, and the research contents of this paper are verified by experiments.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM341

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本文編號：1440687