22 January 2024 | Vasileios I. Vlachou, Georgios K. Sakkas, Fotios P. Xintaropoulos, Maria Sofia C. Pechlihanidou, Themistoklis D. Kefalas, Marina A. Tsili and Antonios G. Kladas
This paper provides an overview of recent trends and developments in permanent magnet (PM) motors, focusing on their design, performance, and challenges. Permanent magnet motors are crucial for energy efficiency in electric vehicles (EVs) and high-speed applications due to their high efficiency, low maintenance, and high power/torque density. However, challenges such as demagnetization, thermal management, and material limitations must be addressed. The paper discusses various PM motor topologies, including inner and outer rotor configurations, surface-mounted (SPMSMs) and interior (IPMSMs) PM motors, and their respective advantages and disadvantages. SPMSMs are known for their high efficiency and good torque density, while IPMSMs offer better performance at high speeds and higher torque density. The paper also explores the impact of PM geometry, material selection, and design optimization on motor performance, including the effects of harmonic losses, flux barriers, and thermal behavior. Advanced modeling techniques, such as finite element analysis (FEA), are used to simulate and optimize PM motor designs. The paper highlights the importance of material properties, such as coercivity and remanence, in determining the performance and reliability of PM motors. It also discusses the challenges of demagnetization, particularly under high-speed and high-load conditions, and the need for robust design strategies to mitigate these risks. The paper concludes with a review of recent advancements in PM motor design, emphasizing the importance of optimizing PM configurations, material selection, and thermal management to enhance the performance and reliability of PM motors in EVs and other high-speed applications.This paper provides an overview of recent trends and developments in permanent magnet (PM) motors, focusing on their design, performance, and challenges. Permanent magnet motors are crucial for energy efficiency in electric vehicles (EVs) and high-speed applications due to their high efficiency, low maintenance, and high power/torque density. However, challenges such as demagnetization, thermal management, and material limitations must be addressed. The paper discusses various PM motor topologies, including inner and outer rotor configurations, surface-mounted (SPMSMs) and interior (IPMSMs) PM motors, and their respective advantages and disadvantages. SPMSMs are known for their high efficiency and good torque density, while IPMSMs offer better performance at high speeds and higher torque density. The paper also explores the impact of PM geometry, material selection, and design optimization on motor performance, including the effects of harmonic losses, flux barriers, and thermal behavior. Advanced modeling techniques, such as finite element analysis (FEA), are used to simulate and optimize PM motor designs. The paper highlights the importance of material properties, such as coercivity and remanence, in determining the performance and reliability of PM motors. It also discusses the challenges of demagnetization, particularly under high-speed and high-load conditions, and the need for robust design strategies to mitigate these risks. The paper concludes with a review of recent advancements in PM motor design, emphasizing the importance of optimizing PM configurations, material selection, and thermal management to enhance the performance and reliability of PM motors in EVs and other high-speed applications.