本文選題：永磁直線同步電機 + 電磁場解析　； 參考：《電子科技大學》2014年碩士論文

【摘要】：當前,隨著各種新型控制策略的深入發(fā)展及電力電子技術與各種高性能材料的研制,傳統(tǒng)電機所帶來的收益已無法滿足市場要求,而直線電機卻蘊藏著巨大的應用潛力,在IC制芯、數(shù)控系統(tǒng)以及封裝設備等領域都有著不錯的發(fā)揮,并逐步成為高檔數(shù)控機床的主要功能部件,是實現(xiàn)“高精、高速”要求的必要途徑之一。然而影響直線電機應用前景的重要原因之一是由各種內部外部因素(摩擦擾動、系統(tǒng)參數(shù)攝動等)所催生的推力波動,這會對直線電機的運行性能(定位精度、低速時的平穩(wěn)性等)造成重大影響。本文將以普什寧江機床股份有限公司高速高精臥式加工中心直驅技術實驗平臺的直線電機為研究對象,以削弱推力波動對永磁直線同步電機性能的影響為核心問題,針對推力波動產生因素及伺服控制系統(tǒng)進行了深入研究,提出直線電機結構改進措施及推力波動的控制策略補償方案。本文首先對直線電機的發(fā)展狀況及各方面研究進展進行剖析,并在介紹本文研究的永磁直線同步電機(PMLSM)構造特征及運作機理的基礎上,運用鏡像法建立電機的物理模型并進行求解,從而得到永磁直線同步電機的磁場分布。同時對直線電機的電磁場進行瞬態(tài)分析,詳細討論永磁直線同步電機的瞬態(tài)磁場分布,并對所引入方法的精確性進行驗證。然后在PMLSM電磁場分析的基礎之上對推力波動及引起推力波動的主要原因磁阻力進行深入研究,結合相應的邊界條件,建立有限元分析模型,并提出改善推力波動的結構改進措施。通過仿真驗證解析分析結果的正確性以及所提出的結構改進措施的有效性。最后,提出一種改進的無速度傳感器直接推力控制系統(tǒng),用兩個PI控制器代替?zhèn)鹘y(tǒng)的磁滯控制器對推力及定子磁通進行控制:該系統(tǒng)將推力及定子磁通進行解耦,在靜磁通坐標系下用兩個獨立控制環(huán)分別進行控制。再經過仿真驗證結果的魯棒性以及對推力波動的抑制與削弱效果。
[Abstract]:At present, with the further development of various new control strategies and the development of power electronics technology and various high-performance materials, the benefits brought by the traditional motor can no longer meet the market requirements, but the linear motor has great application potential.In the field of IC core-making, NC system and packaging equipment, it has become the main functional part of high-grade NC machine tool, and is one of the necessary ways to realize the requirement of "high precision and high speed".However, one of the important reasons that affect the application prospect of linear motor is the thrust fluctuation caused by various internal and external factors (friction disturbance, system parameter perturbation, etc.), which will affect the performance (positioning accuracy) of linear motor.The smoothness at low speed, etc.) causes a major impact.In this paper, the linear motor of the experimental platform of high speed and high precision horizontal machining center of Pushinjiang Machine tool Co., Ltd. is taken as the research object, and the core problem is to weaken the influence of thrust fluctuation on the performance of permanent magnet linear synchronous motor (PMLSM).The factors of thrust fluctuation and servo control system are studied deeply, and the improvement measures of linear motor structure and the compensation scheme of thrust fluctuation control strategy are put forward.In this paper, firstly, the development of linear motor and its research progress are analyzed, and on the basis of introducing the structure and operation mechanism of PMLSM studied in this paper,The physical model of permanent magnet linear synchronous motor (PMLSM) is established and solved by mirror image method, and the magnetic field distribution of PMLSM is obtained.At the same time, the transient magnetic field distribution of permanent magnet linear synchronous motor is discussed in detail, and the accuracy of the proposed method is verified.Then, based on the analysis of PMLSM electromagnetic field, the magnetic resistance of thrust fluctuation and the main cause of thrust fluctuation are studied in depth, and the finite element analysis model is established combining with the corresponding boundary conditions.The structure improvement measures to improve thrust fluctuation are put forward.The correctness of the analytical results and the effectiveness of the proposed structural improvement measures are verified by simulation.Finally, an improved speed sensorless direct thrust control system is proposed, in which two Pi controllers are used instead of the traditional hysteresis controllers to control the thrust and stator flux. The system decouples the thrust and stator flux.Two independent control loops are used to control the magnetostatic flux coordinate system.The robustness of the simulation results and the effectiveness of restraining and weakening the thrust fluctuation are verified by simulation.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM359.4

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本文編號：1755236