Title :
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
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2013.2248340
