Modeling and Experimental Verification of an Unconventional 9-Phase Asymmetric Winding PM Motor Dedicated to Electric Traction Applications

Abstract

Multi-phase permanent magnet motors are becoming popular in various applications such as high power traction which require low cogging and torque ripple, and reduced noise and vibration. This paper presents the development process of a full order detailed mathematical model for an unconventional nine-phase permanent magnet (PM) motor with asymmetric AC windings. The phase inductances are calculated based on the individual winding functions. Using these parameters, electrical equations for each phase based on the voltages and flux linkages are generated. These equations are transformed into an arbitrary reference frame and the torque equations are developed for the 9-phase motor. A Matlab-Simulink model is then developed for the proposed nine-phase PM motor based on the developed dynamic equations. Finally, the model is validated with the finite element analysis and laboratory testing of the prototype motor. It is shown that the developed mathematical model can be used for such complex asymmetric winding multi-phase PM motors.

Multiphase Stator Winding: New Perspectives, Advanced Topologies, and Futuristic Applications

“…Moreover, an unconventional asymmetrical nine-phase SPM machine had been developed in [92] to mitigate the drawbacks of the conventional asymmetrical nine-phase machines. The detailed machine mathematical model has been presented and verified by FE simulations and experiments.…”

Electromagnetic Torque Ripple in Multiple Three-Phase Brushless DC Motors for Electric Vehicles

“…One can also obtain the latter useful property in a machine of asymmetric configuration. Herewith, it can have two TP sets-DTP [12], three TP sets-TTP [36], or four TP sets-QTP [37] of armature winding. The offset angle between these TP sets should be…”

“…Electronics 2021, 10, x FOR PEER REVIEW 4 of 26 DTP [12], three TP sets-TTP [36], or four TP sets-QTP [37] of armature winding. The offset angle between these TP sets should be π γ= 3i (1) where i is the number of TP sets of the armature winding.…”

Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

“…The most up-to-date research has diligently continued to shed light on the numerous advantages of this promising technology in different applications. To this end, recent literature has addressed many of the challenges, including but not limit to: control [3]- [7], modelling [8]- [10], improved winding layout designs [11][12][13][14], and innovative applications [15], [16].…”