Design and Tests of a Four-Layer Fractional-Slot Interior Permanent-Magnet Motor

Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

“…In recent years, in the field of electric motors for automotive applications, different solutions have been proposed, such as axial flux machines [26,27] or fractional slot machines [28]. However, in order to reduce the manufacturing cost, a traditional configuration has been adopted.…”

Design and Optimization of IPM Motor Considering Flux Weakening Capability and Vibration for Electric Vehicle Applications

“…The parameters and performance of three kinds of motors are described Sustainability 2018, 10, 1533 2 of 15 in detail in Sections 2 and 4 of this paper. Some novel rotor permanent magnet motors have been proposed in prior works [13][14][15].…”

Design methods for high power density permanent magnet motors and high efficiency induction motors

“…Hence, there is high risk for them to be susceptible to partial irreversible demagnetization. This can be avoided thanks to a sleeve (made of non-ferromagnetic material with high electrical conductivity) that is placed around them [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The sleeve helps the magnets' retention when the rotational speed is too high.…”

“…The permeance variation in the airgap may cause high torque ripple when the magnets and the stator teeth dimensions are not properly selected. The curving of the magnets' surface declines the torque ripple, but this is a countermeasure of high cost [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…This standard includes both single-phase and three-phase squirrel-cage IMs with 2, 4, 6 and 8 poles. Moreover, it covers a wide scope of products, as motors with rated output power from 0.12 kW up to 1000 kW and supply voltage from 50 V up to 1 kV are involved [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. According to the latest relevant European Union legislation, the efficiency of the three-phase medium-sized IMs (i.e.…”