Title :
Effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings
Author :
Yamazaki, Katsumi ; Fukushima, Yu
Author_Institution :
Dept. of E. E. C. E., Chiba Inst. of Technol., Narashino, Japan
Abstract :
In this study, we investigate the effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings. The loss-reduction effects in each harmonic eddy currents in the magnets are analyzed by both the theoretical solution and the 3-D finite element analysis with Fourier transformation. Basic experiments using magnet specimens are carried out in order to support the calculated results. It is clarified that the loss reduction effect varies with the harmonic orders and that the effect depends on the types of the rotors, for example, interior and surface magnet types.
Keywords :
Fourier transforms; finite element analysis; synchronous motors; 3D finite element analysis; Fourier transformation; concentrated windings; eddy-current loss reduction; magnet segmentation; synchronous motors; Eddy currents; Finite element methods; Magnetic analysis; Magnetic flux; Magnetic losses; Magnetic separation; Permanent magnet motors; Pulse width modulation inverters; Rotors; Synchronous motors; Eddy currents; finite element methods; harmonics; inverters; losses; magnetic field; permanent magnet machines;
Conference_Titel :
Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5177-7
Electronic_ISBN :
978-4-88686-067-5
DOI :
10.1109/ICEMS.2009.5382795
