Analysis of Permanent Magnet Arrangement On The Rotor of A Four-Pole Electric Machine

The article deals with the various prismatic magnets arrangement schemes on the cylindrical rotor of a four-pole electric machine. The analysis of two-dimensional magnetic fields was carried out using the FEMM program. The calculation was performed for four or eight prismatic magnets with the same summary energy. As a result of the calculation, the images of the magnetic field lines of the electric machine with different variants of arrangement of prismatic magnets on the rotor are obtained. Analysis of magnetic fields allowed to determine three schemes with the highest value of flux density in the air gap: rotor with four or eight prismatic magnets magnetized in the tangential direction, fixed on a non-magnetic sleeve; rotor with eight prismatic magnets with V-type arrangement of two magnets for each pole, embedded to the rotor core of soft magnetic material.