An Overview of New Trends in Electric Machine for HEV

This paper provides an overview of emerging trends in electric machine technology for hybrid electric vehicles (HEVs) and presents a comparative study of different machine configurations. The paper begins by examining the propulsion system requirements for HEVs and the different configurations, including series, parallel, and dual-mode HEVs. The requirements for motor characteristics in an electric vehicle propulsion system are then described, including efficiency, torque, speed range, power density, and reliability. The paper then looks at a comparative study of induction and synchronous machines. For induction machines, the design and advantages are discussed, as well as their limitations and techniques for improving performance, such as vector control and multiphase drives. Synchronous machines, including surface permanent magnet (SPM), internal permanent magnet (IPM), and insert and spoke (BLDC) motors, are also reviewed, highlighting their advantages, disadvantages, and design considerations. New trends are highlighted by presenting permanent magnet hybrid motors as a promising solution for hybrid electric vehicles. Finally, a comparative analysis of these types of electric machines provides a better understanding of their suitability for different vehicle applications. Power density, efficiency, controllability, reliability, torque characteristics, and cost-effectiveness are among the factors taken into account in the assessment. In particular, the study highlights the importance of adapting the choice of electric motor to the specific needs and design priorities of hybrid electric vehicles. Overall, this paper provides valuable information on the latest trends and advances in electric machine technology for hybrid electric vehicles.