Design Rules for Permanent Magnet Synchronous Machine with Tooth Coil Winding Arrangement
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Beschreibung
This thesis presents the generic rules for permanent magnet synchronous machine (PMSM) with tooth coil winding arrangement. The generic rules concentrates on minimized cogging torque and torque ripple. The geometries considered in this thesis are two different tooth coil winding arrangements and three different rotor types to formulate the design rules. The occurrence of parasitic torque in the PMSM is classified from the origin of harmonic sources. The cogging torque and torque ripple are derived analytically using the stator current sheet distribution, the rotor field distribution and the permeance functions. The detailed torque analysis are performed in Finite Element Method (FEM) for different slot opening and magnet pole coverage.The 2D harmonics analysis approach is used to predict the sources of the harmonics. The torque is reconstructed from the selected harmonics combinations and are compared with the pulsating torque obtained directly from the FEM. The harmonic sources of pulsating torque are also validated with prototype for a geometry. The investigations on pulsating torque are extended to other operating points such as field weakening and half load condition.Finally, the generic design rules are suggested for PMSM with tooth coil winding arrangement. In addition, simplified design rules to have quick design approach and design guidelines from manufacturing point of view are suggested. von Asaf Ali, Ahamed Bilal
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