本文選題：開關(guān)磁阻電機 + 有限元分析��； 參考：《河北工程大學》2014年碩士論文

【摘要】：開關(guān)磁阻電機作為一種新型的調(diào)速系統(tǒng)，在電機領域具有明顯優(yōu)勢，如結(jié)構(gòu)簡單堅固，系統(tǒng)穩(wěn)定，調(diào)速范圍廣等。但由于其定轉(zhuǎn)子呈雙凸極結(jié)構(gòu)，使得該電機的電磁轉(zhuǎn)矩具有周期脈動性，由此導致了磁場具有飽和特性及非線性，在SR電機運行時會產(chǎn)生較大的振動和噪聲，這也成為制約該電機發(fā)展和應用的一個重要因素。長久以來，如何更好地抑制電機的轉(zhuǎn)矩脈動和振動一直是研究的焦點所在。本文針對開關(guān)磁阻電機轉(zhuǎn)矩脈動較大的特點，通過改進電機本體結(jié)構(gòu)，，以達到優(yōu)化電機性能的目的。 首先，對開關(guān)磁阻電機的基本方程以及三種數(shù)學模型進行了詳細闡述，同時對各種模型下的電感、繞組電流及轉(zhuǎn)矩在不同階段的變化情況進行了研究。 其次，依據(jù)電機的電磁設計及性能參數(shù)設計的原則，對開關(guān)磁阻電機進行預設計。運用ANSOFT軟件對樣機進行了電磁場有限元分析與瞬態(tài)仿真，在此基礎上對電機轉(zhuǎn)子采用斜槽結(jié)構(gòu)，并將斜槽前后電機的靜態(tài)特性進行了對比分析，分析可知，轉(zhuǎn)子斜槽結(jié)構(gòu)可有效改善電機性能且對轉(zhuǎn)矩脈動削弱作用明顯。 將不動點理論引入遺傳算法，并采用基于不動點理論的改進遺傳算法對轉(zhuǎn)子斜槽結(jié)構(gòu)的開關(guān)磁阻電機進行優(yōu)化，并建立了多目標優(yōu)化模型，最終得到了優(yōu)化問題的近似最優(yōu)解集，同時驗證了該算法的可行性和有效性，為電機優(yōu)化設計提供了一種通用方案。
[Abstract]:As a new type of speed regulation system, switched reluctance motor (SRM) has obvious advantages in the field of motor, such as simple structure, stable system, wide speed range and so on. However, because of the doubly salient structure of stator and rotor, the electromagnetic torque of the motor has periodic pulsation, which leads to the saturation and nonlinearity of the magnetic field, which will produce large vibration and noise when the SR motor is running. This also becomes an important factor that restricts the development and application of the motor. For a long time, how to better restrain torque ripple and vibration of motor has been the focus of research. In view of the large torque ripple of switched reluctance motor (SRM), the structure of SRM is improved in order to optimize the performance of SRM. Firstly, the basic equations and three mathematical models of switched reluctance motor (SRM) are described in detail. At the same time, the variations of inductance, winding current and torque in different stages are studied. Secondly, according to the principle of electromagnetic design and performance parameter design, the switched reluctance motor is predesigned. The electromagnetic field finite element analysis and transient simulation of the prototype were carried out by using ANSOFT software. On this basis, the rotor of the motor was constructed with slant slot structure, and the static characteristics of the motor before and after the slant slot were compared and analyzed. Rotor slotting structure can effectively improve motor performance and weaken torque ripple obviously. The fixed point theory is introduced into genetic algorithm, and an improved genetic algorithm based on fixed point theory is used to optimize the switched reluctance motor with rotor slant structure, and a multi-objective optimization model is established. Finally, the approximate optimal solution set of the optimization problem is obtained, and the feasibility and effectiveness of the algorithm are verified, which provides a general scheme for the optimal design of the motor.
【學位授予單位】：河北工程大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM352

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