The state of the art high-torque electric motors has been reviewed in this paper. This paper presents a literature review density machines based on their airgap classifications, which brings unique consideration to new design ideas increase torque density. Electric are classified into three main groups configuration, i.e., (1) with constant airgap, (2) variable and (3) an eccentric airgap. also...

Modern electrical machines employed in transportation applications are required to provide high performance terms of power (and torque) density. At the same time, being these safety-critical, a significant level reliability and/or fault tolerance is expected. Among all factors which can compromise motors reliability, partial discharges (PDs) inception one most crucial, particular for low voltag...

Multiphase machines are AC machines characterized by a stator winding composed of a generic number n of phases. In today’s electric drive and power generation technology, multiphase machines play an important role for the benefits they bring compared to traditional three-phase ones (Levi, 2008; Levi et al., 2007). Such benefits have been widely highlighted by existing literature (Levi et al., 2...

This paper presents the design and analysis of fractional slot multilayer interior permanent magnet synchronous machines (PMSMs) with concentrated winding for electric vehicles applications. The major advantages of concentrated winding will be analyzed first. The significant design consideration of multilayer interior permanent magnet machines will be illustrated, as well. Finally, the advanced...

Swarm Intelligence in the form of Particle Swarm Optimization (PSO) has potential applications in electric drives. The excellent characteristics of PSO may be successfully used to optimize the performance of electric machines and electric drives in many aspects. It is estimated that, electric machines consume more than 50% of the world electric energy generated. Improving efficiency in electric...

On the basis of the shifting process of automated mechanical transmissions (AMTs) for traditional hybrid electric vehicles (HEVs), and by combining the features of electric machines with fast response speed, the dynamic model of the hybrid electric AMT vehicle powertrain is built up, the dynamic characteristics of each phase of shifting process are analyzed, and a control strategy in which torq...

We have designed kits of flexibly configurable components that students use to quickly wind and construct dc motors, permanent-magnet (pm) machines, and induction motors. They can use these machines to verify design calculations, test their understanding of the machine operating principles, and to test power electronic drives that they also design and construct. In class, the properties of diff...

This report summarizes the studies done during the fall 2007 semester. It includes the literature review, and research done on the subject of the Ph.D. dissertation. Since the oil crises of the 1970's, fuel economy has been one of the dominant issues in automotive industry. Therefore, a lot of research work has been focused on finding more efficient methods for transportation. One approach is p...

In a world where environment protection and energy conservation are growing concerns, the development of electric vehicles (EV) and hybrid vehicles (HEV) has taken on an accelerated pace. Electricity is gaining more importance in critical applications such as transportation (with more electric aircrafts and electric vehicles) where continuity of operation is crucial and there is a growing deman...