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The layout of power modules is one of the key points in power module design, especially for high power densities, where couplings are increased. Stray inductances cause various problems in switching devices and should be minimized at an early design stage to avoid later required countermeasures and redesign after the device prototype has been built. In this paper, using Ansys® Q3D® Extractor, electromagnetic...
This paper deals with rare-earth-free permanent magnet traction machine design for C-segment electric vehicle (EV). Four different ferrite permanent magnet synchronous machine topologies having different magnets arrangement and pole-pair number, selected for their high potential, are presented and compared thanks to a computationally efficient finite-element based analysis tool that was developed...
This paper deals with the performance analysis of a high-speed (HS) permanent magnet (PM) machine for an automotive application. Electromagnetic performances in terms of torque, power and losses have been calculated. In order to reduce PM eddy-current losses, tangential and axial segmentation have been studied. Besides electromagnetic performances, the mechanical integrity of the rotor has been analyzed...
This paper presents a nonlinear adaptive magnetic equivalent circuit (MEC) of a coaxial magnetic gear (MG). High speed (HS) and low speed (LS) rotors are equipped with surface mounted PMs. The stationary ring (SR) located between the rotors is constituted by magnetic iron pieces which create the flux modulation. Using the MEC, the magnetic flux density is calculated in the different parts of the MG,...
This paper describes a 3-D numerical hybrid method (NHM) of the permanent-magnet (PM) eddy-current losses in axial-flux PM synchronous machines (PMSMs). The PM magnetic flux density is determined using the multi-static 3-D finite-element method (FEM) at resistance-limited (i.e., without eddy-current reaction field). Based on the predicted flux density distribution, the eddy-currents induced in the...
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