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Permanent magnet assisted synchronous reluctance machines (PMA SynRM), stemming from the combination of synchronous reluctance and interior PM machine topologies, have recently gained increasing popularity as a viable candidate for electric vehicle traction applications due to concerns regarding the price volatility of rare-earth magnet materials. Their attractiveness can be attributed to their distinct...
This paper reviews the historic and current development of magnetic gear technologies. There has been considerable amount of research and development activities on magnetic gear technologies in recent years. However, it is still not clear if this technology is ready for potential industry applications. The purpose of this paper is to summarize the historic and current development work of magnetic...
This paper presents the design, construction and performance evaluation of a disc-type magnetically geared permanent magnet (MGPM) machine for wind power application. The electromagnetic design for both magnetically coupled and decoupled configurations are described. Considering the complex structure of a MGPM machine, special attention is also paid to the mechanical design aspects. The optimized...
This paper presents the design of a magnetically geared PM machine with an inner stator. Both magnetically coupled and decoupled configurations are evaluated. Key design aspects are discussed. The machine is optimized for maximum torque per active mass using two-dimensional finite element (FE) analysis. Special attention is also paid to cogging torque minimization. The performance characteristics...
The paper describes the merits of a recently developed form of 3-phase permanent magnet brushless ac machine in which the concentrated coils of each stator phase are either wound on adjacent teeth or on alternate teeth. Such a machine is often referred to as modular, and offers a number of significant advantages over conventional permanent magnet brushless machines. For example, it results in a smaller...
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