【摘要】：永磁同步電機(jī)具有體積小,結(jié)構(gòu)簡(jiǎn)單,功率因數(shù)高,調(diào)速范圍寬等一系列優(yōu)點(diǎn),在實(shí)際應(yīng)用中起著越來(lái)越重要的作用。因此,對(duì)于永磁同步電機(jī)的相關(guān)研究受到越來(lái)越多國(guó)內(nèi)外專家學(xué)者的關(guān)注,同時(shí)也成為交流傳動(dòng)領(lǐng)域的研究熱點(diǎn)。隨著社會(huì)的快速發(fā)展,交流傳動(dòng)領(lǐng)域?qū)τ谟来磐诫姍C(jī)的控制性能要求也隨之提高,傳統(tǒng)的PI控制算法由于存在著參數(shù)時(shí)變、外部擾動(dòng)及電機(jī)非線性特性等一系列不確定因素的影響,因而已經(jīng)難以滿足交流調(diào)速系統(tǒng)優(yōu)良調(diào)速性能的需求。預(yù)測(cè)函數(shù)控制作為一種新型控制算法,最顯著的優(yōu)點(diǎn)就是控制量輸出方程運(yùn)算簡(jiǎn)便,實(shí)時(shí)控制計(jì)算量較小、跟蹤性能好、快速性好、穩(wěn)態(tài)精度高,因此特別適用于永磁同步電機(jī)的高性能控制。首先,針對(duì)調(diào)速系統(tǒng)電流環(huán)跟蹤精度、速度環(huán)控制精度及魯棒性的問(wèn)題,在矢量控制調(diào)速系統(tǒng)框架下,基于預(yù)測(cè)函數(shù)控制理論分別設(shè)計(jì)了電流預(yù)測(cè)函數(shù)控制器和速度預(yù)測(cè)函數(shù)控制器,有效地提高了調(diào)速系統(tǒng)電流內(nèi)環(huán)跟蹤精度和速度外環(huán)控制精度。由于負(fù)載擾動(dòng),參數(shù)不確定性等因素的影響,容易產(chǎn)生較大預(yù)測(cè)誤差的特點(diǎn),設(shè)計(jì)了非線性干擾觀測(cè)器(NDOB)估計(jì)系統(tǒng)擾動(dòng)并對(duì)控制量進(jìn)行前饋補(bǔ)償,提高了調(diào)速系統(tǒng)的魯棒性,最后對(duì)所提控制策略進(jìn)行仿真驗(yàn)證,證實(shí)了方法的有效性。其次,設(shè)計(jì)了一種基于NDOB的永磁同步電機(jī)滑模預(yù)測(cè)函數(shù)控制器,基于預(yù)測(cè)函數(shù)控制理論和滑�？刂评碚摲謩e設(shè)計(jì)了電流內(nèi)環(huán)預(yù)測(cè)函數(shù)控制器和速度外環(huán)滑�？刂破�,有效地提高了電流內(nèi)環(huán)的跟蹤精度和速度外環(huán)控制精度。然而傳統(tǒng)的滑�？刂撇呗源嬖谥鴦×业亩墩�,極大的降低了系統(tǒng)的性能,于是設(shè)計(jì)了非線性干擾觀測(cè)器,對(duì)系統(tǒng)的不確定性擾動(dòng)進(jìn)行估計(jì)補(bǔ)償。減小系統(tǒng)抖振的同時(shí),提高了系統(tǒng)的動(dòng)態(tài)性能和魯棒性,最后對(duì)所提控制策略進(jìn)行仿真驗(yàn)證,證實(shí)了方法的有效性。最后,為了更進(jìn)一步的驗(yàn)證本課題中控制策略的有效性,合理搭建了以美國(guó)TI公司生產(chǎn)的DSP芯片作為控制核心的PMSM矢量控制調(diào)速系統(tǒng)實(shí)驗(yàn)平臺(tái),進(jìn)行了實(shí)驗(yàn)驗(yàn)證,證實(shí)了控制策略的有效性。
[Abstract]:Permanent magnet synchronous motor (PMSM) has a series of advantages, such as small size, simple structure, high power factor and wide range of speed regulation, which play an increasingly important role in practical application. Therefore, the research on permanent magnet synchronous motor (PMSM) has attracted more and more attention from experts and scholars at home and abroad, and it has also become a hot research topic in AC drive field. With the rapid development of society, the control performance of permanent magnet synchronous motor (PMSM) in AC drive field is also improved. The traditional PI control algorithm is time-varying due to the existence of parameters. Because of the influence of a series of uncertain factors, such as external disturbance and nonlinear characteristic of motor, it is difficult to meet the demand of excellent speed regulation performance of AC speed regulation system. As a new control algorithm, the most obvious advantage of predictive functional control is that the output equation of the control variable is easy to operate, the real-time control computation is small, the tracking performance is good, the speed is good, and the steady-state precision is high. Therefore, it is especially suitable for high performance control of permanent magnet synchronous motor (PMSM). Firstly, aiming at the problems of current loop tracking precision, speed loop control precision and robustness of speed regulation system, under the frame of vector control speed regulation system, Based on the predictive function control theory, the current predictive function controller and the velocity predictive function controller are designed respectively, which effectively improve the tracking precision of the current inner loop and the speed outer loop control precision of the speed regulating system. Due to the influence of load disturbance, parameter uncertainty and other factors, it is easy to produce large prediction error. A nonlinear disturbance observer (NDOB) is designed to estimate the disturbance of the system and make feedforward compensation for the control variables. The robustness of the speed regulation system is improved. Finally, the proposed control strategy is simulated to verify the effectiveness of the method. Secondly, a permanent magnet synchronous motor sliding mode predictive function controller based on NDOB is designed. Based on the predictive function control theory and sliding mode control theory, the current inner loop predictive function controller and the velocity outer loop sliding mode controller are designed respectively. The tracking precision of the current inner loop and the control precision of the speed outer loop are improved effectively. However, the traditional sliding mode control strategy has severe buffeting, which greatly reduces the performance of the system. Therefore, a nonlinear disturbance observer is designed to estimate and compensate the uncertain disturbance of the system. At the same time, the dynamic performance and robustness of the system are improved while reducing the chattering of the system. Finally, the proposed control strategy is simulated to verify the effectiveness of the method. Finally, in order to further verify the effectiveness of the control strategy in this topic, a PMSM vector control system experiment platform based on the DSP chip produced by TI Company in the United States is set up, and the experimental verification is carried out. The effectiveness of the control strategy is verified.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP273;TM341

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