高压电机纯环氧绝缘系统的性能研究OACSTPCD
Research on Pure Epoxy Insulation System of High Voltage Motor
随着国家节能减排政策的推广,水力发电、汽轮发电和风力发电得以迅速发展,各种发电机和电动机都朝着高电压、小型化方向发展.在同功率下缩小电机体积,减少绝缘尺寸(包括匝间绝缘和主绝缘)提高槽满率是关键.而绝缘尺寸的减少与绝缘质量及绝缘可靠性相矛盾,只有科学合理的绝缘结构才能使电机既具有优良的性能,又能满足更大功率和更小体积的需要.高压电机绝缘减薄,可以提高主绝缘散热能力,降低电机温升,减少铜导线附近绝缘因温升造成的老化.另外,减薄绝缘厚度可以增加槽利用率,在同样的温升下缩小电机尺寸,铜耗和机械能耗减少.绝缘减薄是提高电机效率、降低制造成本的重要途径,但要实现绝缘减薄,需要研发新型的高性能绝缘材料并优化集成绝缘系统,在不降低电气绝缘性能的前提下,实现绝缘减薄.对电磁线、少胶云母带、环保型环氧真空压力浸渍(VPI)树脂及高阻防晕材料进行研究,并优化集成绝缘系统,进行系统性的性能评定.研究结果表明:优化后的10 kV绝缘系统匝间绝缘厚度为0.40 mm,主绝缘厚度为1.8 mm,起晕电压≥1.7 UN,电老化寿命≥350 h.同时,其具有优良的电气绝缘性能,满足高压电机的技术要求.
With the increasing promotion of national energy conservation and emission reduction policies,hydropower,turbine power generation and wind power generation have developed rapidly,and various generators and motors are developing in the direction of high voltage and miniaturization.It is the key to reduce the volume of the motor at the same power,reduce the insulation size(including inter-turn insulation and main insulation)and increase the slot full rate.The reduction of insulation size is a contradiction with insulation quality and insulation reliability.Only a scientific and reasonable insulation structure can make the motor not only have excellent performance,but also meet the needs of larger power and smaller volume.The insulation thinning of high voltage motor can improve the heat dissipation capacity of main insulation,reduce the temperature rise of motor,and reduce the aging of insulation near copper wire caused by temperature rise.In addition,reducing the insulation thickness can increase the utilization rate of the slot,reduce the size of the motor under the same temperature rise,and reduce the copper consumption and mechanical energy consumption.High voltage motor insulation thinning is an important way to improve motor efficiency and reduce manufacturing costs,but to achieve insulation thinning,it is necessary to develop new high-performance insulation materials and optimize integrated insulation system,without reducing electrical insulation,aging and other properties of the premise of insulation thinning.Electromagnetic wire,mica tape with less glue,environmental protection epoxy vacuum pressure impregnation(VPI)resin and high resistance anti-halo material are studied,and integrated insulation system is optimized for systematic performance evaluation.The results show that the optimized 10 kV insulation system has the insulation thickness between turns 0.40 mm,the main insulation thickness 1.8 mm,the corona voltage ≥1.7 UN,and the electric aging life≥350 h.At the same time,it has excellent electrical insulation performance and meets the technical requirements of high voltage motor.
朱孟华
佳木斯电机股份有限公司,黑龙江 佳木斯 154000
动力与电气工程
高压电机绝缘减薄高效电机
high voltage motorinsulation thinninghigh efficiency motor
《电机与控制应用》 2024 (008)
59-66 / 8
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