NDLI: Calculation method of circulating current in parallel armature windings in consideration of magnetic circuit

Content Provider	IEEE Xplore Digital Library
Author	Yoshida, J. Hino, N. Takahashi, K. Nakahara, A. Komura, A. Hattori, K.
Copyright Year	2013
Description	Author affiliation: Hitachi Res. Lab., Hitachi Ltd., Hitachi, Japan (Yoshida, J.; Hino, N.; Nakahara, A.; Komura, A.) \|\| Power Syst. Co., Hitachi Ltd., Hitachi, Japan (Takahashi, K.; Hattori, K.)
Abstract	Recently, the capacity of turbo generators used in power plants is increasing in order to keep up with the growth of electric power consumption in the world. Turbo generators are consequently experiencing problems, including increasing electromagnetic force, temperature rise of armature coils, etc., as we try to increase the armature current to keep pace with the capacity increase. One way of avoiding these problems is to increase the number of parallel armature windings for decreasing the armature current per coil. However, the circulating current in the parallel windings is generated by the difference of the linkage flux of each winding, when the number of parallel windings is not a divisor of pole numbers. In this paper, we propose a simple method to calculate the circulating current by using a magnetic circuit in the design phase. We confirmed the proposed method has a similar accuracy and faster performance in comparison with the finite element method (FEM) analysis. And then we applied the proposed method to a calculation of the circulating current in 2- and 4-pole generators and considered the factors affecting the circulating current.
Sponsorship	IEEE Power Energy Soc.
Starting Page	1
Ending Page	5
File Size	345626
Page Count	5
File Format	PDF
ISBN	9781479913039
ISSN	19449925
DOI	10.1109/PESMG.2013.6672197
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-21
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Windings Generators Finite element analysis Coils Inductance Couplings Rotors turbo generators Circulating current voltage unbalance parallel armature windings linkage flux
Content Type	Text
Resource Type	Article

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