Title :
Influence of the Welding Process on the Performance of Slotless PM Motors With SiFe and NiFe Stator Laminations
Author :
Krings, Andreas ; Nategh, Shafigh ; Wallmark, Oskar ; Soulard, Juliette
Author_Institution :
Dept. of Electr. Energy Conversion, KTH R. Inst. of Technol., Stockholm, Sweden
Abstract :
The influence of the welding process during the manufacturing of small slotless permanent-magnet synchronous machines (PMSMs) is studied in this paper. The focus lies on the change of the magnetic properties in high-quality silicon-iron (SiFe) and nickel-iron (NiFe) electrical steel sheets with thicknesses of 0.1 and 0.2 mm. It is shown that the welding process changes the magnetic material properties significantly and increases the specific iron losses. Experimental results are provided for magnetic flux densities up to 1.5 T and frequencies from quasi-static to 200 Hz. The obtained measurement data is afterward used in finite-element method (FEM) simulations to investigate the influence of the magnetic property changes on the motor performance, particularly with regard to stator core losses.
Keywords :
finite element analysis; laminations; magnetic flux; magnetic hysteresis; nickel alloys; permanent magnet motors; silicon alloys; stators; synchronous motors; welding; FEM simulation; NiFe; SiFe; finite element method; magnetic flux density; magnetic material property; nickel iron electrical steel sheet; permanent magnet synchronous machine; silicon iron electrical steel sheet; size 0.1 mm; size 0.2 mm; slotless PM motor; slotless PMSM; stator core loss; stator lamination; welding process; Loss measurement; Magnetic cores; Magnetic hysteresis; Saturation magnetization; Stator cores; Welding; Windings; Magnetic hysteresis; magnetic losses; magnetic materials; nickel–iron alloys; permanent-magnet machines; silicon–iron alloys; slotless machines;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2013.2270972
