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For variable-speed drives, the interaction of the machine and the converter is becoming increasingly important, especially for high-speed applications, mainly due to the effect of the converter modulation on the machine losses. The allocation of the losses to different components of the drive system needs to be known in order to choose the ideal machine and modulation combination. In this paper, individual...
Copper losses in magnetic coils depend on several geometrical parameters, as well as on frequency, in a way that makes their modeling a quite difficult task. In this paper a finite element analysis (FEA) software is utilized for the investigation of a series of issues critical for the accurate determination of copper losses in layered coils with round wires or foils. Some of the issues investigated...
This contribution presents a Modelica library for the simulation of electrical asymmetries in multiphase machines -the ExtendedMachines library. Simulation models of squirrel cage and slip ring induction machines, permanent magnet and electrical excited synchronous machines and reluctance machines are introduced. The object oriented model approach, in particular with respect to various models abstractions...
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