定子Delta接线在大电机中的应用  

Application of Stator Delta Connection in Large Motor

作　　者：冯德洋 FENG Deyang(Dongfang Electric Machinery Co.,Ltd.,618000,Deyang,Sichuan,China)

机构地区：[1]东方电气集团东方电机有限公司,四川德阳618000

出　　处：《东方电气评论》2022年第1期26-28,共3页Dongfang Electric Review

摘　　要：定子delta接线易在定子绕组中产生三次谐波环流,增加损耗,并引起发热,电机学经典理论均不推荐在大电机中采用定子delta接线。但定子delta接线在保证电机相电压不变的前提下,可有效降低供电电源电压。且通过改变定子接线的星/角方式,可实现同电机适应于不同电压等级。可见,在大功率电机,定子绕组的delta接线仍有一定应用前景。本文以7200 kW电机为例,论证定子delta接线应用的关注点,并通过工业应用证明其在大电机应用中的可行性。Delta connection of stator is easy to produce the third harmonic circulating current in stator winding,increase the loss and cause heating.The classical theory of electrical machinery does not recommend delta connection in high-power motor.However,delta connection can effectively reduce the power supply voltage on the premise of keeping the motor phase voltage unchanged.Also,by changing the star/delta connection,the same motor can adapt to different voltage levels.It can be seen that delta connection still has application prospect in high-power motor.In this paper,taking 7200 kW motor as an example,we demonstrates the focus of delta connection application,and proves its feasibility in high-power motor application through industrial application.

关 键 词：delta接线 三次谐波 环流 

分 类 号：TM311[电气工程—电机]