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I. MOTIVATION FOR RESEARCH Recently, the use of high-speed permanent magnet synchronous motors (PMSMs) has become prominent owing to their high efficiency, simple structure, high power density, and small size [1–2].
The axial flux permanent magnet (AFPM) machines are widely applied in various industrial settings in recent years, because of high energy density, high efficiency and compact construction as compared with other conventional radial flux permanent magnet (RFPM) machines.
Motivation for research Recently, integrated motor propulsors (IMPs) have been under extensive research and development because of the numerous advantages of underwater propulsion for vehicles, such as a simple, quiet, lightweight, and small-size structure [1].
This paper analyzes the eddy current loss in permanent magnets (PMs) caused by the armature reaction field of a PM synchronous generator (PMSG) on the basis of three-dimensional finite element (3D FE) analysis. The eddy current loss in PMs is the main source of thermal issues. It can result in the irreversible demagnetization of PMs because of direct thermal conduction [1], [2]. Furthermore, because...
Owing to their high efficiency and power density, high-speed permanent magnet (PM) brushless machines are emerging as a key technology for applications as varied as spindle drives, centrifugal compressors, turbo-molecular pumps, gas-turbine generator units, and electric/hybrid vehicle traction systems [1].
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