本文選題：永磁電機(jī)　切入點：磁場調(diào)制電機(jī)　出處：《江蘇大學(xué)》2017年博士論文　論文類型：學(xué)位論文

【摘要】：直接驅(qū)動技術(shù)可消除齒輪箱等機(jī)械變速裝置,將負(fù)載直接與電機(jī)連接,從而可實現(xiàn)高效率、高可靠性、免維護(hù)和運(yùn)行安靜的電機(jī)系統(tǒng)。因此,在傳統(tǒng)工業(yè)和新能源領(lǐng)域受到越來越多的關(guān)注。永磁電機(jī)的轉(zhuǎn)矩密度高、效率高,但一般容錯性能較差,此外,其轉(zhuǎn)矩密度也有待進(jìn)一步的提升,以滿足低速大轉(zhuǎn)矩直驅(qū)電機(jī)系統(tǒng)高轉(zhuǎn)矩密度、強(qiáng)容錯性能的要求。本文基于磁齒輪的磁場調(diào)制基本原理和分?jǐn)?shù)槽集中繞組,提出兼具有高轉(zhuǎn)矩密度、強(qiáng)容錯性能的磁場調(diào)制式永磁(Flux-Modulation Permanent-Magnet,FMPM)容錯電機(jī),形成了設(shè)計高轉(zhuǎn)矩密度、強(qiáng)容錯性能FMPM容錯電機(jī)的一般性方法。本文的研究內(nèi)容涉及分?jǐn)?shù)槽集中繞組FMPM電機(jī)磁場調(diào)制作用機(jī)理及基本工作原理分析、FMPM電機(jī)繞組結(jié)構(gòu)的設(shè)計選擇、新型FMPM電機(jī)的設(shè)計分析、FMPM電機(jī)等效磁網(wǎng)絡(luò)建模方法、容錯控制等方面。本文的主要研究成果包含以下幾個方面:1.基于磁動勢磁導(dǎo)模型,剖析分?jǐn)?shù)槽集中繞組FMPM電機(jī)的基本工作原理。揭示磁場調(diào)制作用的產(chǎn)生原因及利用磁場調(diào)制效應(yīng)提升FMPM電機(jī)轉(zhuǎn)矩密度機(jī)理。推導(dǎo)電機(jī)功率方程。確定影響磁場調(diào)制效果的關(guān)鍵結(jié)構(gòu)參數(shù),為優(yōu)化設(shè)計電機(jī)的轉(zhuǎn)矩密度提供理論依據(jù)和參考。2.分析對比分?jǐn)?shù)槽集中繞組和集中繞組FMPM電機(jī)的工作原理、反電勢、轉(zhuǎn)矩、損耗和效率等各方面性能。提出最大輸出功率的弱磁控制策略,拓寬FMPM電機(jī)的運(yùn)行范圍,揭示不同的繞組結(jié)構(gòu)對FMPM電機(jī)性能的影響機(jī)理,為合理設(shè)計FMPM電機(jī)繞組結(jié)構(gòu),以滿足不同的性能要求,提供參考。3.提出了適用于FMPM容錯電機(jī)的新型混合定子結(jié)構(gòu),在保證電機(jī)轉(zhuǎn)矩密度的前提下,降低電機(jī)永磁體極對數(shù),減小鐵耗、永磁體渦流損耗,從而有效提升效率。闡明了新型混合定子結(jié)構(gòu)對磁場調(diào)制的作用效果。提出了基于混合定子結(jié)構(gòu)的FMPM容錯電機(jī)的一般性設(shè)計方法。4.提出了混合定子和輻向永磁體陣列結(jié)構(gòu)FMPM容錯電機(jī),解決了傳統(tǒng)FMPM容錯電機(jī)轉(zhuǎn)矩密度低和功率因數(shù)低的問題。在保證電機(jī)容錯性能的基礎(chǔ)上,顯著提升FMPM容錯電機(jī)的轉(zhuǎn)矩密度和功率因數(shù),此外,混合定子結(jié)構(gòu)有效提升了電機(jī)高速運(yùn)行時的效率。5.提出了對調(diào)制極部分進(jìn)行基于剖分的等效磁網(wǎng)絡(luò)建模方法,簡化磁導(dǎo)計算模型,提高了等效磁網(wǎng)絡(luò)模型計算精度。同時聯(lián)合傳統(tǒng)等效磁網(wǎng)絡(luò)建模方式,建立整體電機(jī)的等效磁網(wǎng)絡(luò)模型,在不失計算精確性的同時保證了等效磁網(wǎng)絡(luò)計算的快速性,顯著提升FMPM電機(jī)前期優(yōu)化設(shè)計的效率。6.研究了正常運(yùn)行和容錯運(yùn)行的控制策略,分析了電機(jī)正常運(yùn)行和一相開路容錯運(yùn)行的多種空間電壓矢量脈寬調(diào)制控制方式,加工制造了 2臺FMPM容錯實驗樣機(jī),包括傳統(tǒng)的和提出的FMPM容錯電機(jī),搭建了軟硬件實驗平臺,測試比較了 2臺電機(jī)的電磁性能,通過實驗,驗證了電機(jī)設(shè)計和控制策略的有效性。
[Abstract]:Direct drive technology can eliminate mechanical transmission device such as gearbox, connect the load directly with motor, so as to achieve high efficiency, high reliability, no maintenance and quiet operation of motor system. The permanent magnet motor has high torque density and high efficiency, but generally poor fault tolerance, in addition, its torque density needs to be further improved. In order to meet the requirements of high torque density and strong fault tolerance of low speed and large torque direct drive motor system, based on the basic principle of magnetic field modulation of magnetic gear and fractional slot concentrated winding, a high torque density is proposed in this paper. Flux-Modulation Permanent-Magnet-FMPM) fault-tolerant motor with strong fault-tolerant performance forms a high torque density. General method of FMPM Fault-Tolerant Motor with strong Fault-Tolerance performance. In this paper, the magnetic field modulation mechanism of fractional slot concentrated winding FMPM motor and its basic working principle are discussed and the design and selection of winding structure of FMPM motor are analyzed. The design and analysis of the new FMPM motor include the modeling method of equivalent magnetic network, fault-tolerant control and so on. The main research results of this paper include the following aspects: 1. Based on the magnetodynamic magnetic conductivity model, The basic working principle of fractional slot concentrated winding FMPM motor is analyzed. The cause of magnetic field modulation and the mechanism of increasing torque density of FMPM motor by using magnetic field modulation effect are revealed. The motor power equation is deduced and the influence on magnetic field modulation is determined. Key structural parameters of the effect, This paper provides the theoretical basis and reference for optimizing the torque density of the motor. The working principle, reverse EMF, torque of the fractional slot concentrated winding and the concentrated winding FMPM motor are analyzed and compared. In order to design the winding structure of FMPM motor reasonably, this paper puts forward the weak magnetic control strategy of maximum output power, widens the operation range of FMPM motor, and reveals the influence mechanism of different winding structure on the performance of FMPM motor. In order to meet different performance requirements, a new hybrid stator structure suitable for FMPM fault-tolerant motor is proposed, which can reduce the pole logarithm of permanent magnet, reduce iron loss and eddy current loss of permanent magnet under the premise of ensuring motor torque density. The effect of new hybrid stator structure on magnetic field modulation is clarified. A general design method of FMPM fault-tolerant motor based on mixed stator structure is proposed. 4. A hybrid stator and radial permanent magnet are proposed. Array structure FMPM fault-tolerant motor, The problems of low torque density and low power factor of traditional FMPM fault-tolerant motor are solved. The torque density and power factor of FMPM fault-tolerant motor are significantly improved on the basis of ensuring the fault tolerance performance of FMPM motor. The hybrid stator structure can effectively improve the efficiency of the motor at high speed. 5. An equivalent magnetic network modeling method based on subdivision is proposed to simplify the calculation model of magnetic conductance. The calculation accuracy of the equivalent magnetic network model is improved, and the equivalent magnetic network model of the whole motor is established by combining the traditional equivalent magnetic network modeling method. The calculation accuracy is not lost and the calculation speed of the equivalent magnetic network is guaranteed. The efficiency of optimization design of FMPM motor is improved significantly. 6. The control strategy of normal operation and fault-tolerant operation is studied, and several space voltage vector pulse width modulation (SVPWM) control methods for normal operation and one phase open circuit fault-tolerant operation of FMPM motor are analyzed. Two FMPM fault-tolerant experimental prototypes, including the traditional and proposed FMPM fault-tolerant motors, are manufactured. The hardware and software experimental platform is built, and the electromagnetic properties of the two motors are tested and compared. The effectiveness of motor design and control strategy is verified.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：TM351

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