Assist effects of additional permanent magnets in salient-pole synchronous generators

Author

Yamazaki, Katsumi ; Ando, Kei ; Nishioka, Kazuyoshi ; Shima, Kazuo ; Fukami, Tadashi ; Shirai, Keisuke

Author_Institution

Chiba Inst. of Technol., Chiba, Japan

fYear

2010

fDate

6-8 Sept. 2010

Firstpage

1

Lastpage

6

Abstract

The characteristics improvements of salient-pole synchronous generators by inserting additional permanent magnets are investigated from both results of finite element analyses and experiments. First, the assist effects of the magnets in a MVA-class generator are analyzed by the finite element method. Next, the characteristics improvements are validated by the experiment of a small prototype generator. It is revealed that there are two kinds of the assist effects by the additional magnets in the salient-pole synchronous generators. One is the reduction of the magnetic saturation in the rotor-pole bodies. The other is the direct flux linkage of the armature windings from the permanent magnets. The variations in these effects with the load conditions are also clarified.

Keywords

finite element analysis; machine windings; magnetic flux; permanent magnets; rotors; synchronous generators; armature windings; direct flux linkage; finite element analyses; permanent magnets; rotor; salient-pole synchronous generators; Generators; Magnetic cores; Magnetic flux; Magnetic separation; Permanent magnets; Permeability; Saturation magnetization; Finite element methods; machine windings; magnetic cores; magnetic field; magnetic losses; nonlinear equations; permanent magnets; synchronous generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2010 XIX International Conference on

Conference_Location

Rome

Print_ISBN

978-1-4244-4174-7

Electronic_ISBN

978-1-4244-4175-4

Type

conf

DOI

10.1109/ICELMACH.2010.5607490

Filename

5607490