定子永磁型少稀土齒軛永磁互補(bǔ)電機(jī)的設(shè)計(jì)與優(yōu)化
本文選題:電機(jī)設(shè)計(jì)優(yōu)化 + 少稀土電機(jī); 參考:《江蘇大學(xué)》2017年碩士論文
【摘要】:稀土永磁由于其高高剩磁、高矯頑力、高磁能積等優(yōu)點(diǎn)已被廣泛應(yīng)用于永磁電機(jī)、機(jī)械電子、衛(wèi)生醫(yī)療等領(lǐng)域,但是近年來(lái)稀土永磁材料面臨著各種問(wèn)題。首先稀土永磁的重要原材料稀土是一種不可再生的資源,隨著人們過(guò)度地開(kāi)采以及低效地加工和利用,稀土資源儲(chǔ)量已迅速減少。再加上市場(chǎng)對(duì)稀土資源的需求巨大,造成了當(dāng)前稀土價(jià)格不斷上漲的趨勢(shì)。另外,由于某些稀土還是制造一些高精設(shè)備和尖端武器不可或缺的戰(zhàn)略資源,稀土材料的穩(wěn)定供應(yīng)也是一個(gè)問(wèn)題。由于永磁電機(jī)是稀土永磁材料最大的應(yīng)用領(lǐng)域,因此如何維持電機(jī)較高電磁性能的同時(shí),減小電機(jī)稀土永磁用量已成為永磁電機(jī)研究的新方向。本文首先介紹了少稀土電機(jī)的研究現(xiàn)狀,圍繞定子永磁型電機(jī)的結(jié)構(gòu)特點(diǎn),提出了一種齒軛永磁互補(bǔ)結(jié)構(gòu)的定子永磁型少稀土電機(jī)。該電機(jī)通過(guò)特殊的永磁體安放位置和獨(dú)特的充磁方向,使得電機(jī)能夠在維持較優(yōu)越的電磁性能的同時(shí)減小稀土永磁的用量。接著,結(jié)合電機(jī)的結(jié)構(gòu)特點(diǎn)介紹了電機(jī)的工作原理,并從電機(jī)運(yùn)行原理入手,對(duì)電機(jī)各數(shù)學(xué)關(guān)系進(jìn)行重新推導(dǎo)總結(jié),然后得出該類電機(jī)的一般設(shè)計(jì)方法。然后對(duì)電機(jī)主要參數(shù)進(jìn)行初步設(shè)計(jì)。為了提高電機(jī)優(yōu)化的效率,本文提出了一種基于參數(shù)敏感度和關(guān)聯(lián)度的分層綜合多目標(biāo)優(yōu)化方法。該優(yōu)化方法不僅分析了參數(shù)對(duì)目標(biāo)的影響大小,還考慮了參數(shù)之間的交叉影響,基于參數(shù)敏感度和關(guān)聯(lián)度的分析結(jié)果將參數(shù)分層進(jìn)行優(yōu)化,減小優(yōu)化問(wèn)題的維數(shù)從而提高優(yōu)化效率。然后,鑒于電機(jī)結(jié)構(gòu)的特殊性,提出兩種不同的優(yōu)化策略,并比較了這兩種優(yōu)化策略的優(yōu)化結(jié)果。對(duì)其中繞組優(yōu)化結(jié)果的轉(zhuǎn)子進(jìn)行斜極角度優(yōu)化,得到最終優(yōu)化模型。隨后為了獲得電機(jī)更加準(zhǔn)確的電磁性能,本文對(duì)電機(jī)的磁場(chǎng)分布、氣隙磁密、磁鏈、反電勢(shì)、定位力矩、輸出轉(zhuǎn)矩等性能進(jìn)行深入分析。此外,還以傳統(tǒng)雙凸極永磁電機(jī)為參照對(duì)比分析了該電機(jī)的永磁體利用率。其后,從理論分析和有限元仿真兩個(gè)方面同時(shí)對(duì)電機(jī)的抗退磁能力進(jìn)行了評(píng)估校驗(yàn)。最后,基于最終優(yōu)化模型加工了原理樣機(jī),搭建電機(jī)測(cè)試平臺(tái)并進(jìn)行了相關(guān)的實(shí)驗(yàn)測(cè)試。通過(guò)比較仿真和實(shí)驗(yàn)結(jié)果,驗(yàn)證了該電機(jī)設(shè)計(jì)和優(yōu)化的正確性和有效性。
[Abstract]:Rare earth permanent magnets have been widely used in the fields of permanent magnet motor, mechanical electronics, medical treatment and so on because of their high remanence, high coercivity and high magnetic energy product. But in recent years, rare earth permanent magnetic materials are faced with various problems. First of all, rare earth is an important raw material of rare earth permanent magnet, which is a kind of non-renewable resource. With the over-exploitation and inefficient processing and utilization of rare earth resources, the reserves of rare earth resources have been rapidly reduced. Coupled with the market demand for rare earth resources, resulting in the current trend of rising rare earth prices. In addition, the stable supply of rare earth materials is also a problem, as some rare earths are also an indispensable strategic resource for the manufacture of some sophisticated equipment and sophisticated weapons. As the permanent magnet motor is the largest application field of rare earth permanent magnet materials, how to maintain the high electromagnetic performance of the motor at the same time, reducing the amount of rare earth permanent magnet motor has become a new research direction of permanent magnet motor. In this paper, the current research status of rare earth motor is introduced, and a stator permanent magnet motor with complementary structure of tooth yoke permanent magnet is proposed around the structure of stator permanent magnet motor. The special permanent magnet position and special magnetization direction make the motor maintain superior electromagnetic performance while reducing the amount of rare earth permanent magnet. Then, the working principle of the motor is introduced according to the structural characteristics of the motor, and the mathematical relations of the motor are rededuced and summarized, and the general design method of this kind of motor is obtained. Then the main parameters of the motor are preliminarily designed. In order to improve the efficiency of motor optimization, a multi-objective optimization method based on parameter sensitivity and correlation degree is proposed. The optimization method not only analyzes the influence of parameters on the target, but also considers the cross-influence of parameters. The results based on the sensitivity and correlation degree of the parameters are used to optimize the parameters. The optimization efficiency is improved by reducing the dimension of the optimization problem. Then, in view of the particularity of the motor structure, two different optimization strategies are proposed, and the optimization results of the two optimization strategies are compared. The rotor with windings optimization result is optimized by skew angle, and the final optimization model is obtained. Then, in order to obtain more accurate electromagnetic performance of the motor, the magnetic field distribution, air gap magnetic density, flux chain, reverse EMF, positioning torque and output torque of the motor are deeply analyzed in this paper. In addition, the permanent magnet utilization ratio of the traditional doubly salient permanent magnet motor is compared and analyzed. Then, the anti-demagnetization ability of the motor is evaluated and calibrated from two aspects: theoretical analysis and finite element simulation. Finally, the principle prototype is processed based on the final optimization model, and the motor testing platform is built and the related experimental tests are carried out. The correctness and effectiveness of the design and optimization of the motor are verified by comparing the simulation and experimental results.
【學(xué)位授予單位】:江蘇大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TM351
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