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Magnetic Fields

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Introduction to Motors - University of Nebraska Omaha

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Electric Equipment Guarding and Workspaces

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... obtained. For example, for a motor with a continuous rating of 50 kW at 2000 r/min (209 rad/s) with a cooling coefficient of 50 W/m2.°C, a temperature rise of 60°C, and an equivalent depth of armature conductor of 10 mm, the linear current density could be about 40 A/mm. For an arbitrarily chosen l/ ...
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IOSR Journal of Electrical and Electronics Engineering (IOSRJEEE)

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... (say) Then, voltage across the load, V = IRa Power generated, Pg = Eg×I Power delivered to the external load, PL = V×I. Self-excited DC Generators These are the generators whose field magnets are energized by the current supplied by themselves. In these type of machines field coils are internally co ...
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... order of the model. According our experience, one of the most efficient methods to reduce the order of RF-IC models is based on Vector Fitting (VF) [7]. VF starts from the values of the transfer function, computed from (22) in a set of given frequency samples and it finds the best rational approxima ...
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Electric machine

The academic study of electric machines is the universal study of electric motors and electric generators. By the classic definition, electric machine is synonymous with electric motor or electric generator, all of which are electromechanical energy converters: converting electricity to mechanical power (i.e., electric motor) or mechanical power to electricity (i.e., electric generator). The movement involved in the mechanical power can be rotating or linear.Although transformers do not contain any moving parts they are also included in the family of electric machines because they utilise electromagnetic phenomena.Electric machines (i.e., electric motors) consume approximately 60% of all electricity produced. Electric machines (i.e., electric generators) produce virtually all electricity consumed. Electric machines have become so ubiquitous that they are virtually overlooked as an integral component of the entire electricity infrastructure. Developing ever more efficient electric machine technology and influencing their use are crucial to any global conservation, green energy, or alternative energy strategy.
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