Title :
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
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;
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
DOI :
10.1109/ICELMACH.2010.5607490
