Using grain oriented electrical steel sheets for electric motor in automotive application: Tooth segmentation

Abstract

Grain Oriented Electrical Steel (GOES) have better performance in terms of permeability and iron losses compared to conventional Fe-Si 3% Non-Oriented Grains Electrical Steel (NOES), particularly when it is magnetized in the rolling direction. This paper presents a concentrated winding radial flux permanent magnets synchronous machine (PMSM) equipped with teeth made of GOES sheet. The goal is to assess the suitability of the use of GOES sheets to improve the efficiency of electric motors. This work is based on the comparison of the performances (Joule losses, iron losses, losses in the permanent magnets and efficiency) of two iso-geometric motors: a reference motor made of NOES sheets and a motor with GOES sheet teeth, at iso-torque and over the operating range (at constant torque and flux weakening). The comparison is made using a finite element software application considering the magnetic anisotropy of the GOES sheets.

Keywords

PMSM magnetic circuit anisotropy grain oriented electric steel motor performances

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References

Auverlot

Meilhan

Mesqui

and Pommeret

, Les politiques publiques en faveur des véhicules à très faibles émissions, France stratégie, France, 2018.

Denis

Takeda

Fujitani

Fujisaki

and Odawara

, Anisotropic magnetic core for the iron loss reduction of permanant magnet synchronous motor, Journal of the Magnetics Society of Japan42 (2018), 62–71.

Pyrhonen

Jokinen

and Hrabovcova

, Design of Rotating Electrical Machines, second edn, Wiley, 2014.

Fujisaki

, Magnetic Material for Motor Drive Systems, Springer, Singapore, 2019.

Soda

and Enokizono

, Improvement of T-joint part constructions in three-phase transformer cores by using direct loss analysis with E&S model, IEEE, Transactions on Magnetics36(4) (2000), 1285–1288.

Fujisaki

and Fujitani

, Design of stator core shape of magnetic anisotropic motor, in: IEEE, International Conference on Electrical Machines, 2012, pp. 183–189.

DATAS: Standard Magnetic Measurements with SST, Thyssenkrupp Electrical Steel, Hazebrouk, France, 2019.

Bava

J.C.

and Verdun

, Alliage fer-silicium, Technique de l’ingénieur, no. D2110.

Sundaria

Daem

Hemeida

Sergeant

Arkkio

and Belahcen

, Effect of different cutting techniques on magnetic properties of grain oriented steel sheets and axial flux machines, in: IEEE, Annual Conference of the IEEE Industrial Electronics Society, 2019, pp. 1022–1027.

10.

Apperson

J.W.

and Fontaine

C.B.

, The use of preferred orientation strip steel in turbine-generator stator, IEEE (AIEE Transactions) (1951), 836–840.

11.

Pei

Zeng

and Coombs

, Studies on GO silicon steel used in traction motor, in: IEEE, International Conference on Electrical Machines & Systems, 2017.

12.

Akatsu

and Sugawara

, Characteristics of a SRM using GO electrical steel, in: IEEE, International Conference on Electrical Machines & Systems, 2013, pp. 1105–1110.

13.

Hao

and Pei

, Performance analysis between grain-oriented and non-oriented material on yokeless and segmented armature machine, in: IEEE, International Conference on Electrical Machines and Systems, 2019.

14.

Aydoun

Parent

Tounzi

and Lecointe

J.P.

, Performance comparison of axial-flux switched reluctance machines with non-oriented and grain oriented electrical steel rotors, Physics18(1) (2020), 981–988.

15.

Kaneki

Higuchi

Yokoi

and Abe

, Performance of segment type switched reluctance motor using GO, in: IEEE, International Conference on Electrical Machines and Systems, 2012.

16.

Koga

Todaka

and Enokizono

, Vector magnetic characteristic analysis of segment type SRM utilizing GO electrical steel sheets, in: IEEE, International Conference on Electrical Machines and Systems, 2012.

17.

Lopez

Cassoret

Brudny

J.-F.

Lefebvre

and Vincent

J.N.

, GO steel assembly characterization for the developement of high effeciency AC rotating electrical machines, IEEE, Transaction on Magnetics (2009), 4161–4164.

18.

Mallard

Demian

Brudny

J.-F.

and Parent

, The use of segmented-shifted grain-oriented sheets in magnetic circuits of small AC motors, Open Physics17 (2019), 617–622.

19.

Nakata

Fujiwara

Takahashi

Nakano

and Okamoto

, An improved numerical analysis of flux distributions in anisotropic materials, IEEE Transaction on Magnetics30(5) (1994), 3395–3398.