Three Dimensional Magnetic Field Computation by a Coupled Vector-scalar Potential Method in Brushless DC Motors with Skewed Permanent Magnet Mounts-the No-Load and Load Results
Institute of Electrical and Electronic Engineers (IEEE)
IEEE Transactions on Energy Conversion
The coupled magnetic vector potential-magnetic scalar potential (CMVP-MSP) method of computation of 3D magnetic fields by finite elements (3D-FE) is applied here to a brushless DC motor with skewed permanent magnet mounts on its rotor. Results of the CMVP-MSP and 3D-FE computation of the magnetic field and associated motor parameters (EMFs and armature inductances) are detailed in this paper. These results demonstrate vividly the three dimensional nature of the computed flux distributions, caused by the torque ripple reduction design employing skewed magnet mounts on the rotor. Experimental evidence supporting the validity of the BD-FE field computations, through comparison between computed and measured armature EMF waveforms is also provided in this paper.
Alhamadi, M. A. and Demerdash, Nabeel, "Three Dimensional Magnetic Field Computation by a Coupled Vector-scalar Potential Method in Brushless DC Motors with Skewed Permanent Magnet Mounts-the No-Load and Load Results" (1994). Electrical and Computer Engineering Faculty Research and Publications. 493.