电加热紫外光固化浸漆工艺在新能源汽车电机制造中的应用

随着电机制造技术的进步,电机绝缘技术也在快速发展。根据在电动汽车/混合动力汽车（EV/HEV）驱动电机制造领域的工程实践,从绝缘浸渍漆、工艺、设备3方面出发,介绍了一种适用于散嵌绕组电机的新型绝缘处理技术：电加热紫外光固化工艺（E-UV）。通过实际应用,证实了该技术具有能耗低、生产周期短、绝缘浸渍漆利用率高等特点,适用于EV/HEV驱动电机的批量生产。     

B—F级耐潮无溶剂浸渍漆的研制

本文介绍了一种具有良好防水，防潮性能的Ｂ－Ｆ级通用无溶剂浸渍漆的制备及性能，该浸渍树脂系以及环氧树脂和不饱和聚酯为基体材料，通过添加有效的改性剂及催化促进体系，使该浸渍树脂具有较好的耐水性，电气绝缘性能和Ｆ级的耐热指数，能较好地满足目前Ｂ－Ｆ电机电器的绝缘处理要求。     

B-F级耐潮无溶剂浸渍漆的研制

本文介绍了一种具有良好防水、防潮性能的B－F级通用无溶剂浸渍漆的制备及性能。该浸渍树脂系以环氧树脂和不饱和聚酯为基体材料,通过添加有效的改性剂及催化促进体系、使该浸渍树脂具有较好的耐水性,电气绝缘性能和F级的耐热指数,能较好地满足目前B－F电机电器的绝缘处理要求。     

H级双马来酰亚胺无溶剂浸渍漆

本文介绍了一种H级聚酰亚胺浸渍漆的改性方法,该浸渍漆具有良好的热稳定性及电气绝缘性能,可满足H级电机的使用要求。     

不同浸渍漆对电机绝缘性能的影响

浸漆绝缘处理对电机可靠性至关,通过对比试验,介绍四种浸渍漆的粘结力对漆包线漆膜、绕组外观、电机温升的影响,选择７１２２－１漆作为Ｆ、Ｂ级电机的优选漆种,此外还介绍了该漆性能,分析其工艺性、经济性。     

采用真空压力浸漆技术的电机绝缘的应用研究

近年来真空压力浸漆技术在国内开始应用于电机行业，其应用的关键是寻找到适合真空压力浸漆技术的电机绝缘用材料-少胶粉云母带和浸渍漆，且他们应匹配良好。作用通过试验分析，筛选出不饱和聚酯亚胺树脂体系的少胶粉云母带和浸渍漆的绝缘组合，取得了良好的效果。     

环氧改性耐热聚酯无溶剂漆的研制及应用

为开发F、H级通用的无溶剂漆．用耐热的多元醇和多元酸、耐热树脂及顺丁烯二酸酐合成了耐热聚酯，与环氧树脂和其他添加合剂配合制成无溶剂浸渍漆，并进行一系列的性能试验和工艺试验。结果表明，该漆具有粘度小、固化快、挥发物小、贮存稳定性好的优点，同时具有优良的电气性能、耐热性和防潮性，可作为F、H级无溶剂浸渍漆，适用于电机的滴浸、常压浸渍和真空压力浸渍绝缘处理。在微电机、中小型低压电机和煤矿电机中的应用结果表明，该漆完全满足上述各型电机的技术要求．现已在工厂大量生产。     

改性聚酰亚胺浸渍漆的研究

本文论述了聚酰亚胺浸渍漆的一种改性方法,讨论了各种因素对浸渍漆的影响。所研制的浸渍漆具有良好的热稳定性及电气绝缘性能,可满足电机电器的使用要求。     

全封闭压缩机电机用绝缘浸渍漆评价方法

分析了全封闭式涡旋制冷压缩机电机的使用环境和特点,并将其与普通电机的使用环境进行了对比。提出了全封闭式压缩机电机用绝缘浸渍漆的评价要求和方法,并对某型应用于压缩机电机的绝缘浸渍漆进行了评价测试。     

H级绝缘浸渍漆的优选及应用

通过对绝缘浸渍漆的酸值、贮存稳定性和耐热性等基本性能研究,优选出了性能优良的聚酯亚胺型H级浸渍漆,并对该漆的粘度和固化工艺进行了研究,结果表明,优化浸渍工艺后可将其应用于高频电子变压器的绝缘处理。     

Electrical breakdown in high-voltage winding insulations of different manufacturing qualities

Due to an increasing demand for new, or the refurbishment of power stations, high-voltage rotating machines continue to play a significant role in generating electrical energy. An important component of these machines is their electrical insulation. Although much research has been done to improve the material, about a quarter of all failures still are related to insulation problems. Research to improve winding insulation is very complex because a large number of factors influence insulation life, among them the raw materials, size of the mica tapes, geometrical characteristics of the bar and taping- or manufacturing techniques. The results show that electrical tree propagation is the main electrical degradation mechanism that leads to breakdown of the main wall insulation and that poor impregnation of the insulation and type of taping can reduce time to breakdown significantly.     

大型电机绝缘技术的国内外对比分析

通过改进和优化绝缘结构和制造工艺,大型电机绝缘技术已实现国产化,经与国外先进技术进行对比,结果表明:我国大型电机绝缘系统的性能和质量等已基本达到美国GE公司和瑞士ABB公司的同期水平。     

The improvement of the electrical insulation of high voltage electrical machines

Comparative parameters are presented for the electrical insulation systems of high voltage electric machines. Composite insulation materials produced by different manufacturers are studied. The influence of the structure and composition of electrical insulation materials on the main operation parameters (electric strength, dielectric losses, the mechanical characteristics, and resistance to thermal cycling) of the insulation systems of electric machines is shown.     

Understanding surface partial discharges in HV coils and the role of semi-conductive protection

An electrical insulating system in high voltage rotating machines is subjected to several stresses that cause changes of material properties during its lifetime. This phenomenon reduces progressively ability of the insulation to withstand the service stresses. Internal partial discharges can be located inside the high voltage insulation and usually they are dangerous for life-cycle duration. Surface discharges are generated at the solid/air interface in the gaps of machine stator slots or at the slot exits. Surface discharges can cause more intensive deterioration of the insulation, accelerate aging processes and definitively take aim toward premature failure of the machine. The application of conductive or semi-conductive protection layer provides certain protection for solid insulation from these discharges. Semi-conductive corona protection tapes are used on the coils at the slot exit region to electrical field control and prevent surface discharges. Laboratory measurements of the surface partial discharge quantities in specimens of high voltage coils with mica insulation were performed. The aim of the paper is to describe theoretically the development of surface discharges in rotating machines and to present surface partial discharge development in HV motors when semi-conductive layer protection is missing. The results can be found useful to understand better the surface discharge development and importance of high-quality semi-conductive protection technology.     

Measures and technologies to enhance the insulation condition monitoring of large electrical machines

The utility of condition monitoring of the stator insulation structure of large machines has been enhanced substantially by the use of computer-based analysis of partial discharge signatures. A number of indices are examined through tests in a multistress aging facility to assess their promise in describing insulation degradation in machine insulation. In transitioning such tests to the field environment, an operational test is also described which offers some promise in identifying degradation without prior baseline data for a machine. On the basis that most electrical failures have mechanical precursors, acoustic methods are described for assessing stator bar mechanical integrity. This includes both using the conductors as waveguides and also employing acoustic emission for the location of large discharges.     

Effects of converter pulses on the electrical insulation in low and medium voltage motors

A new IEC test specification is under development for the insulation systems used in converter-driven machines with the aim of providing manufacturers with a reliable means to quality insulation systems for use in converter-fed machines and users with confidence that the machines they purchase contain insulation that is fit for their intended purposes. Much of the qualification testing for insulation systems subject to converter voltages may be undertaken with existing 50/60 Hz equipment. However, for testing of complete coils in low voltage machines, an impulse generator and an impulse PD test set are required. For large machines, which have stress-graded endwindings, it will be necessary for a source of converter voltage to be available.     

Evaluation of the state of the insulation system of a stator winding of high-voltage electric machines based on measurements of statistical characteristics of partial discharges

The statistical characteristics of amplitude and amplitude-phase spectra of PDs in the insulation of model specimens with artificial flaws in a semiconducting coating are investigated. The algorithm for distinguishing the flaws in the stator winding insulation of high-voltage electrical machines based on statistical parameters of the PD spectra is developed and practically implemented.     

电机定子结构及其绝缘介电常数的频率特性对定子绕组电容值的影响

确定电机定子线棒的高频参数对于研究局部放电信号在电机绕组中的传播特性及研究PWM逆变器驱动的交流电机的定子绕组电压分布有重要意义。文中对大型汽轮发电机定子线棒的电容做了比较详细的研究，内容包括：对电机定子线棒复合绝缘等值介电常数的频率特性的测试研究、采用数值计算方法计算出用铝箔纸裹住的电机定子线棒的多导体传输线模型的单位长度电容、线棒股线间薄绝缘对电容的影响、对铁心硅钢片叠片间隙对电容的影响等。其数值计算结果与之前测量得到的电容值比较吻合，这也证明了通过测量开路阻抗、短路阻抗来得到电机定子线棒分布参数的试验方法是有效的。     

New electric insulating materials for the insulation systems of rotating electrical machines

A wide range of nomenclature and properties for new materials for the insulation of high voltage electrical machines and traction motors of F and H insulation classes developed at Elinar Holding Company are presented in the report.     

Vacuum insulation for a lunar-based power system

Current plans for the development of an established manned base on the surface of the Moon will require power levels from 100 kW up to 1 MW. Voltage levels for transmission will likely approach 10 kV, with distances between sources and loads of up to 5 km. Vacuum insulation is being considered due to its simple and low mass design. In this paper we discuss the problems in implementing large scale vacuum insulation in the lunar environment. Computer models have been developed to predict electrical energy loss and thermal energy flow. The advantages and disadvantages of several designs are discussed, including mass, size, and thermal management. Potential electrical breakdown mechanisms that might occur in the lunar environment are proposed