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

fYear

2013

fDate

26-29 Oct. 2013

Firstpage

474

Lastpage

479

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2013 International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4799-1446-3

Type

conf

DOI

10.1109/ICEMS.2013.6713113

Filename

6713113