[Show abstract][Hide abstract] ABSTRACT: Performance investigations and drive designs of an interior permanent magnet (PM) machine, in both the constant torque and the flux-weakening operating regions, are generally conducted based on the machine parameters that are calculated from finite element analysis (FEA). To properly select the optimal current control angles for maximum torque generations at various speeds, this paper presents thorough assessments of the magnetic cross-coupling impacts of the interior PM machine from different calculation schemes. In addition, analytical models based on direct and indirect finite element calculations of the machine characteristics at those severe magnetic saturation conditions will be devised to provide a reliable on-line operational control reference.
Power Electronics and Drive Systems, 2009. PEDS 2009. International Conference on; 12/2009
[Show abstract][Hide abstract] ABSTRACT: The paper presents impacts of the stator slot with skew and segment magnet rotor on the performance of interior permanent magnet (IPM) machine for an electric traction. Comparisons of the average torque, torque ripples, cogging torque and no-load back EMF with skew and un-skew are given and how suitable a segmented rotor IPM machine and its torque characteristic and the field weakening capability are investigated. The results of the machine performance comparisons are based on comprehensive use of finite element analysis tools (Ansoft Maxwell 2D).One of the machine designs with one stator slot-pitch skew and no-segment magnet rotor for electric traction has been manufactured as prototype. From the FEA results, it shows that the IPM synchronous machine with two-teeth stator slots skewed and two-segmented magnet rotor has better performance than the conventional IPM synchronous machine.
Electric Machines and Drives Conference, 2009. IEMDC '09. IEEE International; 06/2009
[Show abstract][Hide abstract] ABSTRACT: This paper presents impacts of different permanent magnet materials and operational temperatures on the performance of interior permanent magnet (IPM) machines for electric vehicle applications. Variations of the average torque, torque ripple, cogging torque, and no-load EMF with different neodymium-iron-boron (NdFeB) permanent magnet materials and operational temperatures are investigated. Based on finite-element method (FEM), performance about the ripple and cogging torques of the IPM machine will be analyzed and some useful conclusions can be provided for researchers and engineers in the related traction motor industries.