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