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This paper presents a set of experimental test and analytical study of a high efficiency single-stator single-rotor axial-flux induction machine prototype, with squirrel cage made of copper. The Carter factor of this prototype is calculated and the magnetizing current for different air gaps are measured. Then, the Current as function of voltage for different air gaps curves are shown. Based on these...
In this paper, a high energy efficiency control strategy for electric power generation with synchronous reluctance machine (SynRM) is proposed. This kind of machine is gaining attraction in various fields of application due to its high efficiency, compactness and the capability of operating over a wide speed range. These features are highly desirable for generators especially those that operate from...
A new efficiency-improving permanent magnet rotor structure for a tooth-coil-winding open-slot axial-flux machine is proposed. The composite-body-based rotor construction used in the machine has no electro-magnetic losses in the rotor body itself. The construction also significantly reduces the eddy current losses in the permanent magnets and improves short-circuit strength. A prototype of an axial...
Thermal modeling of a 100 kW radial flux permanent magnet electrical machine is studied and verified by experiments. The traction machine has hybrid cooling. A simplified thermal model based on Computational Fluid Dynamics (CFD) was used to analyze the temperature distribution throughout the machine. The machine has a water jacket and adopts potting materials around the end-windings. The potting materials...
This paper targets to the challenge of electrical energy production and energy efficiency by studying synchronous reluctance machines (SynRM), as an alternative to permanent magnet generator in electric power generation with focus in renewable energy applications. Considering the SynRM as a special case of the wound-rotor synchronous generator, this paper explores the operating limits of the machine...
Although permanent-magnet synchronous machine design is well known and has been treated in technical literature, the non-linearity introduced by the saturation of the iron laminations has not been considered. This fact makes uncertain the calculation of the stator-rotor mutual reactance (Xm) and therefore the no-load voltage (Ef) is also undefined. Both inexactitudes have incidence on the power calculations...
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