Title :
Influence of PWM switching frequency and modulation index on the iron losses and performance of slot-less permanent magnet motors
Author :
Krings, Andreas ; Soulard, Juliette ; Wallmark, Oskar
Author_Institution :
Dept. of Electr. Energy Conversion, KTH R. Inst. of Technol., Stockholm, Sweden
Abstract :
This paper investigates the influence of switching frequency and modulation index on the iron losses in thin silicon-iron (SiFe) lamination sheets of a small slot-less permanent magnet synchronous machine (PMSM). First, measurements are conducted on one welded and one non-welded stator core for switching frequencies between 1 kHz and 20 kHz and modulation indices of 0.4, 0.7, and 0.9, keeping constant fundamental flux density peak values. The obtained measurement data is afterwards used in finite element method (FEM) simulations to investigate the switching frequency influence on the performance of the PMSM.
Keywords :
PWM invertors; finite element analysis; iron alloys; laminations; loss measurement; permanent magnet motors; silicon alloys; synchronous motors; FEM simulations; PMSM; PWM switching frequency; SiFe; SiFe lamination sheets; finite element method simulations; frequency 1 kHz to 20 kHz; iron losses; modulation index; slotless permanent magnet synchronous machine; stator core; thin silicon-iron lamination sheets; Iron; Loss measurement; Magnetic cores; Modulation; Stator cores; Switching frequency; Windings; AC machines; iron alloys; loss measurement; machine design; magnetic materials; permanent magnet machines; silicon-iron;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2013 International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4799-1446-3
DOI :
10.1109/ICEMS.2013.6713113
