發(fā)布時(shí)間：2018-06-15 07:20

  本文選題：IPMSM + 矢量控制　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：永磁同步電機(jī)廣泛應(yīng)用于生活中的各個(gè)領(lǐng)域,在采用矢量控制的驅(qū)動(dòng)控制系統(tǒng)中多使用位置傳感器定向轉(zhuǎn)子磁場(chǎng)位置、計(jì)算轉(zhuǎn)速。但由于安裝、環(huán)境等各方面因素的影響導(dǎo)致的位置傳感器故障,會(huì)造成系統(tǒng)停機(jī)等嚴(yán)重后果,在某些應(yīng)用領(lǐng)域需要使用位置傳感器容錯(cuò)控制對(duì)故障進(jìn)行處理。因此,研究永磁同步電機(jī)驅(qū)動(dòng)系統(tǒng)位置傳感器的容錯(cuò)控制具有重要意義。在位置傳感器故障的容錯(cuò)控制領(lǐng)域,無(wú)位置傳感器算法等軟件容錯(cuò)方法是當(dāng)前的研究熱點(diǎn),本文針對(duì)位置傳感器斷路、碼道故障,在永磁同步電機(jī)矢量控制的基礎(chǔ)上,重點(diǎn)研究了無(wú)位置傳感器轉(zhuǎn)子位置估計(jì)算法、基于限幅值濾波器的碼道故障容錯(cuò)方法以及基于后驗(yàn)概率的斷路故障的容錯(cuò)方法。主要研究?jī)?nèi)容在于:1.研究永磁同步電機(jī)的數(shù)學(xué)模型,以及矢量控制算法,且通過(guò)仿真分析不同位置傳感器故障類(lèi)型對(duì)系統(tǒng)的影響。2.針對(duì)各無(wú)位置傳感器轉(zhuǎn)子位置估計(jì)算法難以在全速段準(zhǔn)確辨識(shí)轉(zhuǎn)速的問(wèn)題,采用將模型參考自適應(yīng)法(MRAS)法和高頻注入法相結(jié)合的方法,通過(guò)量化兩種算法在全速段的估計(jì)準(zhǔn)確度,將其分別用作高速段和低速段的轉(zhuǎn)子位置估計(jì),仿真結(jié)果表明這種方法達(dá)到了在全速段實(shí)現(xiàn)轉(zhuǎn)子位置準(zhǔn)確估計(jì)的效果。3.位置傳感器斷路故障后,反饋轉(zhuǎn)速由位置傳感器采集位置所得轉(zhuǎn)速開(kāi)關(guān)切換至估計(jì)轉(zhuǎn)速時(shí),會(huì)造成系統(tǒng)振蕩甚至發(fā)散。本文研究了一種基于后驗(yàn)概率復(fù)合轉(zhuǎn)速的斷路故障容錯(cuò)控制方法,并針對(duì)該方法中先驗(yàn)概率值,提出了一種基于極大似然投票的計(jì)算方法,通過(guò)仿真與實(shí)驗(yàn)表明,該斷路故障容錯(cuò)控制方法能有效抑制開(kāi)關(guān)切換造成的系統(tǒng)振蕩,使系統(tǒng)在故障點(diǎn)的過(guò)渡更平穩(wěn)。4.針對(duì)位置傳感器碼道故障的容錯(cuò)控制策略的設(shè)計(jì),本文采用限幅值濾波器過(guò)濾數(shù)據(jù)壞點(diǎn),消除碼道故障引起的系統(tǒng)波動(dòng)。并提出了一種最大限幅周期值的整定方法,以最大限幅周期值為閥值,進(jìn)行故障類(lèi)型判斷,以此設(shè)計(jì)了綜合容錯(cuò)控制策略,最終通過(guò)仿真與實(shí)驗(yàn)驗(yàn)證了該綜合容錯(cuò)控制方法對(duì)位置傳感器多類(lèi)故障的檢測(cè)與容錯(cuò)的可行性與有效性。基于simulink仿真與1.1kW內(nèi)埋式永磁同步電機(jī)實(shí)驗(yàn),驗(yàn)證了本文的容錯(cuò)控制策略能夠正確檢測(cè)出位置傳感器斷路及碼道故障,有效抑制碼道故障造成的系統(tǒng)波動(dòng),在斷路故障后亦能夠繼續(xù)穩(wěn)定運(yùn)行,且故障前后過(guò)渡平穩(wěn)。
[Abstract]:Permanent magnet synchronous motor (PMSM) is widely used in all fields of life. In the drive control system using vector control, a position sensor is used to orientate the rotor's magnetic field position and calculate the speed of the rotor. However, the position sensor failure caused by the influence of various factors such as installation and environment will result in serious consequences such as system shutdown and some applications. The fault tolerant control of the position sensor is needed in the field. Therefore, it is of great significance to study the fault tolerant control of the position sensor of the permanent magnet synchronous motor drive system. On the basis of the vector control of permanent magnet synchronous motor, the rotor position estimation algorithm for sensorless sensor, fault tolerance method based on the amplitude limiting filter and the fault tolerance method based on the posterior probability are studied. The main research contents are as follows: 1. the mathematical model of permanent magnet synchronous motor is studied. And the vector control algorithm, and through the simulation analysis of the influence of different position sensor fault types to the system.2., aiming at the problem that the rotor position estimation algorithm of each position sensor is difficult to identify the speed accurately in the full speed section, the method of combining the model reference adaptive method (MRAS) method and high frequency injection method is adopted to quantify two kinds of calculation. The estimation accuracy of the method at the full speed section is used as the rotor position estimation of the high speed and low speed segments. The simulation results show that this method achieves the accurate estimation of the rotor position at the full speed section. After the.3. position sensor is broken down, the feedback speed is switched to the estimated rotation from the position sensor acquisition position to the estimated rotation. In this paper, a fault tolerant control method based on the posterior probability compound rotational speed is studied, and a method based on maximum likelihood voting is proposed for the prior probability value in this method. The simulation and experiment show that the fault tolerant control method can effectively suppress the open fault. The system oscillation caused by switch off makes the transition of the system more stable in the fault point and the design of the fault tolerant control strategy for the position sensor code channel fault. In this paper, the limit amplitude filter is used to filter the bad points of the data and eliminate the system fluctuation caused by the code fault. A method of setting the maximum amplitude cycle value is proposed, with the maximum limit cycle of the.4.. The period value is the threshold value and the fault type is judged, and a comprehensive fault tolerant control strategy is designed. Finally, the feasibility and effectiveness of the integrated fault tolerant control method for detecting and fault-tolerant position sensor fault detection and fault tolerance are verified by simulation and experiment. Based on the Simulink simulation and the 1.1kW embedded permanent magnet synchronous motor experiment, the paper validates this paper. The fault tolerant control strategy can correctly detect the fault of the position sensor circuit breaker and the code channel, effectively suppress the system fluctuation caused by the code fault, and can continue to run steadily after the breakdowns, and the transition is stable before and after the fault.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM341

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本文編號(hào)：2021194