異步電機無速度傳感器矢量控制系統(tǒng)的設計與實現(xiàn)
發(fā)布時間：2018-10-26 15:08
【摘要】：異步電機因結構簡單、性能高等優(yōu)點在調速領域中得到廣泛應用。在其轉速閉環(huán)控制中，為獲得轉速信息而安裝的機械式速度傳感器不僅增加了系統(tǒng)的成本，而且限制了應用范圍并降低了系統(tǒng)的可靠性。因此，進行轉速辨識研究，實現(xiàn)無速度傳感器矢量控制系統(tǒng)具有重要的理論價值和實際意義。 論文以實驗室國家重大科技專項為背景，對轉速辨識技術及無速度傳感器矢量控制系統(tǒng)展開了研究工作。概述了交流調速系統(tǒng)及無速度傳感器矢量控制的發(fā)展現(xiàn)狀；研究了矢量控制理論，推導了坐標變換公式，給出了異步電機在不同坐標系中的數學模型，分析了電壓空間矢量脈寬調制（SVPWM）技術的原理及算法實現(xiàn)；通過建立轉子磁鏈觀測器模型，分析了電壓模型中純積分環(huán)節(jié)存在的積分初值和直流漂移對磁鏈觀測精度的影響，提出了采用帶飽和反饋環(huán)節(jié)的可變截止頻率低通濾波器替代純積分環(huán)節(jié)的改進方法；詳細闡述了模型參考自適應系統(tǒng)（MRAS）進行參數辨識的原理及理論依據，在此基礎上設計出基于轉子磁鏈觀測模型的MRAS轉速辨識算法，并證明了系統(tǒng)的穩(wěn)定性；在Matlab/Simulink平臺中分別對各個模塊進行了建模并實現(xiàn)了完整的控制系統(tǒng)模型，通過仿真驗證了改進的轉速辨識算法的有效性；采用TI公司的電機專用控制芯片TMS320F28335作為硬件平臺，以高精數控實驗室自主研發(fā)的運動控制平臺為軟件基礎，根據組件設計思想實現(xiàn)了完整的無速度傳感器矢量控制系統(tǒng)，實驗結果表明該系統(tǒng)具有良好的動態(tài)性能。 最后，，對論文中所做工作進行了總結，文章在改進轉子磁鏈電壓模型提高轉子磁鏈觀測精度方面做出了貢獻，為提高轉速辨識精度從而實現(xiàn)異步電機無速度傳感器矢量控制系統(tǒng)等后續(xù)研究工作提供了方向。
[Abstract]:Asynchronous motor is widely used in speed regulation field because of its simple structure and high performance. In the closed-loop control of its rotational speed, the mechanical speed sensor installed to obtain the rotational speed information not only increases the cost of the system, but also limits the scope of application and reduces the reliability of the system. Therefore, speed identification and speed sensorless vector control system have important theoretical and practical significance. In this paper, the speed identification technology and the speed sensorless vector control system are studied under the background of the major science and technology project of the laboratory. The development status of AC speed regulation system and speed sensorless vector control is summarized. The vector control theory is studied, the coordinate transformation formula is derived, the mathematical model of asynchronous motor in different coordinate systems is given, and the principle and algorithm realization of voltage space vector pulse width modulation (SVPWM) technology are analyzed. The rotor flux observer model is established to analyze the effect of the integral initial value and DC drift on the flux observation accuracy in the pure integral part of the voltage model. An improved method of replacing pure integral link with variable cutoff frequency low pass filter with saturation feedback link is proposed. The principle and theoretical basis of parameter identification of model reference adaptive system (MRAS) are described in detail. On this basis, an identification algorithm of MRAS speed based on rotor flux observation model is designed, and the stability of the system is proved. Each module is modeled in Matlab/Simulink platform and a complete control system model is implemented. The effectiveness of the improved speed identification algorithm is verified by simulation. Based on the motion control platform independently developed by high precision NC laboratory, a complete speed sensorless vector control system is realized based on the component design idea, using TMS320F28335, a special motor control chip of TI Company, as the hardware platform, and based on the motion control platform independently developed by the high precision NC laboratory, a complete speed sensorless vector control system is realized. The experimental results show that the system has good dynamic performance. Finally, the paper summarizes the work done in the paper, and makes a contribution to improving the rotor flux voltage model to improve the rotor flux observation accuracy. It provides a direction for further research on speed identification accuracy and speed sensorless vector control system of asynchronous motor.
【學位授予單位】：中國科學院研究生院（沈陽計算技術研究所）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM343
[Abstract]:Asynchronous motor is widely used in speed regulation field because of its simple structure and high performance. In the closed-loop control of its rotational speed, the mechanical speed sensor installed to obtain the rotational speed information not only increases the cost of the system, but also limits the scope of application and reduces the reliability of the system. Therefore, speed identification and speed sensorless vector control system have important theoretical and practical significance. In this paper, the speed identification technology and the speed sensorless vector control system are studied under the background of the major science and technology project of the laboratory. The development status of AC speed regulation system and speed sensorless vector control is summarized. The vector control theory is studied, the coordinate transformation formula is derived, the mathematical model of asynchronous motor in different coordinate systems is given, and the principle and algorithm realization of voltage space vector pulse width modulation (SVPWM) technology are analyzed. The rotor flux observer model is established to analyze the effect of the integral initial value and DC drift on the flux observation accuracy in the pure integral part of the voltage model. An improved method of replacing pure integral link with variable cutoff frequency low pass filter with saturation feedback link is proposed. The principle and theoretical basis of parameter identification of model reference adaptive system (MRAS) are described in detail. On this basis, an identification algorithm of MRAS speed based on rotor flux observation model is designed, and the stability of the system is proved. Each module is modeled in Matlab/Simulink platform and a complete control system model is implemented. The effectiveness of the improved speed identification algorithm is verified by simulation. Based on the motion control platform independently developed by high precision NC laboratory, a complete speed sensorless vector control system is realized based on the component design idea, using TMS320F28335, a special motor control chip of TI Company, as the hardware platform, and based on the motion control platform independently developed by the high precision NC laboratory, a complete speed sensorless vector control system is realized. The experimental results show that the system has good dynamic performance. Finally, the paper summarizes the work done in the paper, and makes a contribution to improving the rotor flux voltage model to improve the rotor flux observation accuracy. It provides a direction for further research on speed identification accuracy and speed sensorless vector control system of asynchronous motor.
【學位授予單位】：中國科學院研究生院（沈陽計算技術研究所）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM343
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