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