Direct-Driven Interior Magnet Permanent-Magnet Synchronous Motors for a Full Electric Sports Car

Author

Nerg, Janne ; Rilla, Marko ; Ruuskanen, Vesa ; Pyrhonen, Juha ; Ruotsalainen, Sami

Author_Institution

LUT-Energy, Lappeenranta Univ. of Technol., Lappeenranta, Finland

Volume

61

Issue

8

fYear

2014

fDate

Aug. 2014

Firstpage

4286

Lastpage

4294

Abstract

The design process of direct-driven permanent-magnet (PM) synchronous machines (PMSMs) for a full electric 4 × 4 sports car is presented. The rotor structure of the machine consists of two PM layers embedded inside the rotor laminations, thus resulting in some inverse saliency, where the q-axis inductance is larger than the d-axis one. An integer slot stator winding was selected to fully take advantage of the additional reluctance torque. The performance characteristics of the designed PMSMs were calculated by applying a 2-D finite-element method. Cross saturation between the d- and q-axes was taken into account in the calculation of the synchronous inductances. The calculation results are validated by measurements.

Keywords

automotive electrics; electric propulsion; finite element analysis; permanent magnet motors; rotors; stators; synchronous motors; 2D finite-element method; PM layers; PMSM; direct-driven interior magnet permanent-magnet synchronous motors; direct-driven permanent-magnet synchronous machines; full electric sports car; integer slot stator winding; inverse saliency; q-axis inductance; reluctance torque; rotor laminations; rotor structure; synchronous inductances; Inductance; Magnetic flux; Rotors; Saturation magnetization; Stator windings; Torque; Analysis; PM motors; PM synchronous machine (PMSM); design; electric propulsion; electric vehicle; finite-element analysis (FEA); internal permanent-magnet (PM) motor; synchronous machines;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2013.2248340

Filename

6469213