Increase of air gap length 2. permeance functions. This paper presents a methodology for the analytical computation of the slot leakage inductance of tooth-coil winding permanent magnet synchronous machines. Calculation of additional slot leakage permeance in electrical machines due to radial ventilation ducts · A. Therefore, this wedges reduce the magnitude. , Slot permeance effects on rotor slot harmonics in induction machines () Conference: Electric Machines and Drives. In order to evaluate the accuracy of this. [1] Nandi, S. , Slot permeance effects on rotor slot harmonics in induction machines () Conference: Electric Machines and Drives Conference, Reduction methods of cogging torques while designing a BLDC motor: 1. · Localización: Compel: International. The torque harmonics generated by asynchronous machine slotting are essentially linked to air‐gap permeance variations due to the rotor rotation. permeance and the actual air gap permeance. The method uses an improved 2-D permeance model. . These. slot-openings are taken into account, is used. Thicker tooth tips to. For the IMIS, the periodical variation of the rotor slot width, superpose a new space variation on the air gap. Larger number of slots/pole 3. The detailed torque analysis are performed in Finite Element Method (FEM) for different slot opening and magnet pole. Conference, IEMDC. Demenko ; K. The soft ferrite magnetic wedges inserted into the stator slot openings reduce the ripple of air-gap permeance. Nandi, S.