An improved delta-star switching scheme for reactive power saving in three-phase induction motors

被引：1

作者：

Raja P. ^{[1
]}

Kumaresan N. ^{[1
]}

Subbiah M. ^{[2
]}

机构：

[1] Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu

[2] Department of Electrical and Electronics Engineering, Rajalakshmi Engineering College, Chennai

来源：

Frontiers in Energy | 2014年 / 8卷 / 03期

关键词：

Delta-star switching; Induction motor; Power factor; Steady-state analysis;

D O I：

10.1007/s11708-014-0324-8

中图分类号：

学科分类号：

摘要：

It is proposed that a capacitor can be connected permanently across each phase winding of a three-phase induction motor along with the conventional delta-star switching, for further saving in VARh at reduced loads on the motor. The method of choosing a suitable value for the capacitor and the criteria to be adopted for calculating the power output at which the star to delta switching is to be made are also explained. The experimental results on a 3- phase, 4-pole, 415 V, 50 Hz, 3.3 kWinduction motor verify the advantages in adding the capacitor to the phase winding of the motor. Compared to using only a single delta connected stator winding or a delta-star switching, the advantages of the proposed addition of a capacitor, are also demonstrated through a case study conducted on a 400 V, 250 kW motor. Any further improvement in grid side power factor can be achieved by employing a static synchronous compensator (STATCOM) of reduced VAR rating. © Higher Education Press and Springer-Verlag Berlin Heidelberg 2014.

引用

页码：364 / 370

页数：6

共 11 条

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