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