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Recently, outer-rotor electric machine become a research attention to be applied for in-wheel motor either in electric or hybrid electric vehicles (EVs). Among the competitor for in-wheel machines, the permanent magnet synchronous machine (PMSMs) with an outer-rotor have been used widely due to their high performances in terms of torque ad power. However, there is drawback cause by demagnetization...
The paper presents a comparative study of 3-phase permanent-magnet (PM) synchronous machines (PMSM) with concentrated windings. The purpose of this study is to find a machine giving the better electromagnetic performance (torque, losses, back electromotive force…) for railway traction. Three PMSM with concentrated windings having identical output power, stator and rotor outer diameter, air-gap, axial...
This paper gives different solutions in order to increase torque density of permanent magnets machines. The study deals with low frequency machines and, in this case, iron losses are less important than copper losses, so that supplying the machines with square wave currents can be interesting. The authors identify an original structure in which the end winding parts are removed. The description of...
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