本文選題：盤式無鐵心電機 + Halbach陣列　； 參考：《哈爾濱理工大學(xué)》2015年碩士論文

【摘要】：盤式無鐵心永磁同步電機因其軸向尺寸短、重量輕、結(jié)構(gòu)緊湊、轉(zhuǎn)動慣量小、機電常數(shù)小等優(yōu)點，可以制成多氣隙組合式結(jié)構(gòu)，并被廣泛應(yīng)用于電動汽車、機器人、機械手臂、家用電器等要求薄型安裝的場合。盤式無鐵心永磁電機定轉(zhuǎn)子排列位置有多種組合方式，本文對雙外轉(zhuǎn)子中間定子結(jié)構(gòu)盤式電機的電磁場進行深入研究。 首先本論文為了有效利用電機徑向長度上的空間，，提出了基于Halbach陣列的楔形氣隙結(jié)構(gòu)，并設(shè)計了一臺功率為250W的盤式無鐵心同步電機，給出了電機轉(zhuǎn)子磁極、計算極弧系數(shù)以及導(dǎo)體占空比的計算方法，并將盤式電機沿周向展開得到其二維結(jié)構(gòu)模型，利用有限元方法計算了電機的二維磁場。 其次針對盤式電機三維開域磁場的空氣域問題進行分析，研究了空氣域大小對電機周向氣隙磁密的影響，并以合適的空氣域尺寸建模，同時研究氣隙磁密的徑向分布情況。接著從Halbach陣列永磁體的充磁方向、永磁體厚度、永磁體寬度三個方面對電機轉(zhuǎn)子進行了結(jié)構(gòu)優(yōu)化，并提出了不等厚和不等寬結(jié)構(gòu)永磁體轉(zhuǎn)子，通過對比分析這些結(jié)構(gòu)的周向氣隙磁密波形的正弦性、氣隙磁密的諧波含量以及空載反電勢畸變率來判斷各結(jié)構(gòu)的優(yōu)劣。然后基于各結(jié)構(gòu)永磁體轉(zhuǎn)子的特點提出了梯形永磁體結(jié)構(gòu)盤式電機，并在保證永磁體用量相當(dāng)?shù)臈l件下與其他結(jié)構(gòu)進行對比研究，得出了梯形結(jié)構(gòu)盤式永磁電機的優(yōu)勢。 最后對梯形結(jié)構(gòu)盤式永磁電機進行了電磁場分析，利用磁通法計算了其空載漏磁系數(shù)，分析該電機在額定負載下的電磁轉(zhuǎn)矩特性。利用有限元法計算了空載和負載兩種工況下的永磁體渦流損耗，并得出了影響渦流損耗大小的主要因素。同時計算了不同負載情況下的交直軸電感和軸向電磁力，并得出相關(guān)結(jié)論，為該類電機的進一步深入研究提供有益價值。
[Abstract]:Because of its advantages of short axial dimension, light weight, compact structure, small moment of inertia and small electromechanical constant, disc type iron-less permanent magnet synchronous motor can be widely used in electric vehicles, robots and mechanical arms. Home appliances and other occasions requiring thin installation. There are many kinds of combination of stator and rotor arrangement position of disc type core free permanent magnet motor. In this paper, the electromagnetic field of disk motor with double outer rotor middle stator structure is studied in depth. In this paper, in order to make effective use of the space on the radial length of the motor, a wedge air gap structure based on Halbach array is proposed, and a disk iron-less synchronous motor with 250W power is designed, and the rotor pole of the motor is given. The method of calculating the polar arc coefficient and the duty cycle of the conductor is presented. The two-dimensional structure model of the disc motor is developed along the circumferential direction. The finite element method is used to calculate the two-dimensional magnetic field of the motor. Secondly, the air field of disk motor is analyzed, and the influence of the size of air field on the circumferential air gap magnetic density of the motor is studied, and the appropriate size of the air field is modeled, and the radial distribution of the air gap magnetic density is studied at the same time. Then, the structure of the motor rotor is optimized from three aspects: the magnetization direction, the thickness and the width of the permanent magnet, and the structure of the permanent magnet rotor with unequal thickness and width is proposed. By comparing and analyzing the sinusoidal characteristics of the circumferential air-gap magnetic density waveforms, the harmonic content of the air-gap magnetic density and the no-load inverse EMF distortion rate, the merits and demerits of these structures are judged. Then the trapezoidal permanent magnet disk motor is put forward based on the characteristics of permanent magnet rotor. The advantages of trapezoidal disk permanent magnet motor are obtained by comparing it with other structures under the condition of ensuring the same amount of permanent magnet. Finally, the electromagnetic field of trapezoidal disk permanent magnet motor is analyzed, and its no-load flux leakage coefficient is calculated by flux method, and the electromagnetic torque characteristics of the motor under rated load are analyzed. The eddy current losses of permanent magnets under both no-load and load conditions are calculated by using the finite element method, and the main factors affecting the eddy current losses are obtained. At the same time, the axial inductance and the axial electromagnetic force under different loads are calculated, and the relevant conclusions are drawn, which provide useful value for the further study of this kind of motor.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM341

【參考文獻】

相關(guān)期刊論文 前1條

1 章躍進,謝國棟,屠關(guān)鎮(zhèn);雙邊定子盤式永磁發(fā)電機初步設(shè)計及其性能分析[J];上海大學(xué)學(xué)報(自然科學(xué)版);1998年04期

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