The paper gives guidelines for the design of a multi-stage AFPM with water-cooled ironless stator, and describes characteristics of a two-stage prototype machine rated 220 Nm, 1,100 rpm. ![]() Compared with the traditional coreless AFPM motor, this novel topology for a Halbach permanent magnet array PCB stator AFPM motor has larger air-gap magnetic flux density and air-gap flux per pole. The multistage structure of the machine is suited to overcome the restriction on the machine diameter and meet the torque required at the wheel shaft. A novel topology Halbach permanent magnet array is proposed and applied to the design of a printed circuit board (PCB) axial flux permanent magnet (AFPM) motor. The high efficiency of the machine cooling arrangement allows long-term 100% overload operation and great reduction of the machine weight. In the proposed new topology of the machine the space formerly occupied by the toroidal core becomes a more ยป water duct, which removes heat directly from the interior surface of the stator winding. I am still learningSimulation Generator (Work in prog. The paper presents a newly-conceived AFPM which has multi-stage structure and water-cooled ironless stator. Going a bit more in depth with the different parts of the motor. ![]() Slotless axial-flux permanent magnet machines (AFPMs) prove to be one best candidate for application in electric vehicles as direct-drive wheel motors, as in comparison with conventional machines they allow designs with higher compactness, lightness and efficiency. The design of direct-driven wheel motors must comply with diameter restriction due to housing the motor in a wheel rim and allow the achievement of very high torque density and overload capability. Of course, the design allows easily to be multiplied, hence, rotor, stator, rotor, stator.stack them as much as you want.
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