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PM Machine Optimization in Variable Speed EMB Application
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Abstract
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Electro-Mechanical Batteries have important advantages compared with chemical batteries, especially in Low Earth Orbit satellites applications. High speed, slotless, external rotor, permanent magnet machines are used in these systems as Motor/Generator. Commonly, optimizations of electrical machines are done in constant, nominal speed. But Electro-Mechanical Batteries are variable speed system. In this paper, for energy optimization, the optimization speed is achieved by equalizing the average iron loss and copper loss over a period of charge and discharge. To achieve this goal, analytic design of PM machines is briefly reviewed. Then iron and copper losses are formulated versus speed variations of rotor, which is integrated with flywheel. Finally, the optimization of machine in order to have maximum efficiency and minimum volume and weight are given. Particle swarm optimization (PSO) is used as the optimization algorithm. Copyright (c) 2012 Praise Worthy Prize S.r.l. - All rights reserved.
Keywords:
Electro-Mechanical
Battery
Energy Storage
PM Machine
PSO
Variable Speed
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