本文選題：非晶合金　切入點：永磁電機　出處：《沈陽工業(yè)大學》2017年博士論文

【摘要】：非晶合金作為一種新型軟磁材料,具有優(yōu)異的電磁性能,將其應用于電機鐵心來替代常規(guī)硅鋼片材料,能夠顯著降低電機的鐵心損耗、提高電機效率。但是非晶合金材料同時存在加工難、加工工藝對材料性能影響嚴重等問題,除此之外非晶合金永磁電機的損耗分布也不同于傳統(tǒng)硅鋼片電機。研究非晶合金電機的鐵耗和諧波損耗的計算修正方法、影響規(guī)律以及相關抑制措施對非晶合金永磁電機產(chǎn)業(yè)的發(fā)展具有十分重要的意義。針對非晶合金材料磁化和損耗性能受加工工藝影響嚴重的問題,本文測試了加工后非晶合金鐵心的損耗,并對實驗數(shù)據(jù)進行了歸納,總結出了特定工藝加工的非晶合金鐵心損耗的計算修正方法。設計了一種用以測試過盈配合對鐵心性能影響的實驗裝置,研究了過盈量對非晶合金鐵心損耗的影響規(guī)律。指出過盈配合加工后非晶合金鐵心軛部渦流損耗密度增加嚴重,導致非晶合金鐵心損耗性能惡化,且過盈量越大,損耗性能惡化程度越嚴重�；趯嶒灧椒ǚ蛛x了退火、浸漆固化工藝對非晶合金鐵心損耗的影響規(guī)律。指出對于未經(jīng)退火處理的非晶合金鐵心,由浸漆固化加工引起的損耗增量主要是渦流損耗性質(zhì);對于退火后的非晶合金鐵心,由浸漆固化加工引起的損耗增量主要是磁滯損耗性質(zhì)。針對軸向磁通非晶合金永磁電機存在三維磁場,采用3D有限元分析耗時長且無法直觀展示出損耗與電機結構參數(shù)之間對應關系的問題。本文改進了現(xiàn)有多環(huán)等效模型,建立了變頻器供電情況下,考慮載波比和調(diào)制比參數(shù)對定子繞組諧波電流次數(shù)和幅值影響的軸向磁通非晶合金永磁電機鐵耗和諧波損耗的解析計算模型。利用3D有限元計算結果和實驗結果驗證了該鐵耗和諧波損耗解析計算模型的有效性�；诒疚耐茖У亩喹h(huán)等效解析模型,分析了氣隙長度對軸向磁通非晶合金永磁電機鐵耗和諧波損耗的影響規(guī)律。指出隨著氣隙長度的增加,軸向磁通非晶合金永磁電機鐵耗降低、諧波損耗降低。針對軸向磁通非晶合金永磁電機大多采用多極結構,電機基波頻率高,載波比低的問題。分析了變頻器供電時,載波比參數(shù)對諧波損耗的影響規(guī)律,提出了避免采用3的整數(shù)倍載波比的諧波損耗抑制措施。將該方法應用于一臺基波頻率為800Hz的7k W軸向磁通非晶合金永磁電機的控制,諧波損耗抑制效果明顯。利用實驗方法測試了軸向磁通和徑向磁通非晶合金永磁電機的鐵耗和諧波損耗,將鐵耗和諧波損耗的實驗結果與計算結果進行了對比,對總結的特定工藝加工后的非晶合金鐵心損耗修正方法進行了驗證。利用實驗方法對比分析了具有相同結構尺寸的非晶合金電機與硅鋼片電機的損耗與效率特性存在的差異,并從非晶合金和硅鋼片材料性能之間存在的差別角度出發(fā)分析了產(chǎn)生非晶合金電機與硅鋼片電機損耗差異的原因。
[Abstract]:As a new kind of soft magnetic material, amorphous alloy has excellent electromagnetic properties. The application of amorphous alloy to the motor core to replace the conventional silicon steel sheet material can significantly reduce the core loss of the motor and improve the efficiency of the motor.However, it is difficult to process amorphous alloy materials at the same time, and the processing technology has a serious impact on the properties of materials. In addition, the loss distribution of amorphous alloy permanent magnet motors is different from that of conventional silicon steel sheet motors.It is of great significance for the development of amorphous alloy permanent magnet motor industry to study the calculation and correction method of iron loss and harmonic loss of amorphous alloy motor, the law of influence and the relevant restraining measures.In view of the serious problem that the magnetization and loss properties of amorphous alloy materials are seriously affected by the processing technology, the loss of amorphous alloy core after processing is measured, and the experimental data are summarized.The calculation and correction method of core loss of amorphous alloy processed by special process is summarized.An experimental device was designed to test the effect of interference fit on the core properties. The influence of interference on the core loss of amorphous alloy was studied.It is pointed out that the eddy current loss density in the core yoke of amorphous alloy increases seriously after the interference fit is processed, which leads to the deterioration of the loss performance of the amorphous alloy core, and the greater the interference amount is, the more serious the loss performance is.Based on the experimental method, the effect of annealing and curing process on the core loss of amorphous alloy was studied.It is pointed out that for unannealed amorphous alloy core, the loss increment caused by impregnation and curing process is mainly the eddy current loss property, and for the annealed amorphous alloy core,The loss increment caused by the curing process of impregnated lacquer is mainly hysteresis loss property.In view of the existence of 3D magnetic field in axial flux-amorphous alloy permanent magnet motor, 3D finite element analysis takes a long time and can not show the relationship between loss and motor structure parameters directly.In this paper, the existing multi-ring equivalent model is improved, and the inverter power supply is established.Considering the influence of carrier ratio and modulation ratio parameters on the frequency and amplitude of harmonic current in stator winding, an analytical model for calculating iron loss and harmonic loss of axial flux amorphous alloy permanent magnet motor is presented.The results of 3D finite element calculation and experiment verify the validity of the analytical model of iron loss and harmonic loss.Based on the multi-ring equivalent analytical model derived in this paper, the influence of air gap length on the iron loss and harmonic loss of axial flux amorphous alloy permanent magnet motor is analyzed.It is pointed out that with the increase of air gap length, the iron loss and harmonic loss of axial flux amorphous alloy permanent magnet motor decrease.In order to solve the problem of high fundamental frequency and low carrier ratio, the axial flux amorphous alloy permanent magnet motor mostly adopts multipole structure.In this paper, the influence of carrier ratio parameters on harmonic loss is analyzed, and the measures to avoid harmonic loss of 3 times carrier ratio are put forward.The method is applied to the control of a 7kW axial flux amorphous alloy permanent magnet motor with a fundamental frequency of 800Hz. The harmonic loss suppression effect is obvious.The iron loss and harmonic loss of axial flux and radial flux amorphous alloy permanent magnet motor are measured by experimental method. The experimental results of iron loss and harmonic loss are compared with the calculated results.The modified method of core loss of amorphous alloy after processing is verified.The difference of loss and efficiency between amorphous alloy motor with the same structure and silicon steel sheet motor is analyzed by means of experimental method.From the point of view of the difference between the properties of amorphous alloy and silicon steel sheet, the cause of loss difference between amorphous alloy motor and silicon steel sheet motor is analyzed.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：TM351

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