Available at: https://digitalcommons.calpoly.edu/theses/2990
Date of Award
5-2025
Degree Name
MS in Electrical Engineering
Department/Program
Electrical Engineering
College
College of Engineering
Advisor
Majid Poshtan
Advisor Department
Electrical Engineering
Advisor College
College of Engineering
Abstract
This paper presents a hybrid V-shape spoke type ferrite Interior Permanent Magnet Synchronous Reluctance Machine (PMA-SynRM) for electric vehicle traction application. Ferrite or ceramic IPM-SynRMs compared to Neodymium (NdFeB) based IPM-SynRMs typically have lower torque, power density, and efficiency overall. Motivated by rising costs and international policies making it increasingly more challenging to obtain rare-earth metals, alternatives should be explored. With the help of finite element method (FEM) software, Ansys Maxwell, this study probes into a novel three-phase ferrite-only hybrid Spoke-type V-shaped IPM-SynRM using Tesla Model 3's neodymium powered V-shape interior permanent magnet machine as a benchmark. The proposed motor design currently exhibits 78% of maximum torque with similar torque ripple percentage and a nearly equivalent base speed of 3900 RPM versus 4100 RPM. A comprehensive cost and weight analysis reveals that the total cost of magnets can be reduced to under 5% from ~$1774 to ~$66, using Ceramic-5 instead of N42SH neodymium magnets.