Analytical study of optimal layout of permanent magnet in IPMSM for generating sinusoidal flux-density distribution in air gap

2013 ◽  
Vol 183 (2) ◽  
pp. 39-46
Author(s):  
Minoru Kondo
Keyword(s):  
Density Distribution ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Study ◽  
Air Gap ◽  
Optimal Layout ◽  
Flux Density Distribution

The Analysis of Air Gap Flux Density in Permanent Magnet Brushless Motor with External Rotor

2011 ◽  
Vol 383-390 ◽  
pp. 2666-2671
Author(s):  
Rui Yuan Xu ◽  
Cun Shan Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Density Distribution ◽  
Permanent Magnet ◽  
Flux Density ◽  
Load Condition ◽  
Air Gap ◽  
Brushless Motor ◽  
Flux Density Distribution ◽  
External Rotor

The air gap flux density distribution in different radius of three conditions such as stator iron without slotting, stator iron slotting under no load condition and stator iron slotting under load condition is discussed using the 2-D finite element method. The effect of slotting on the distribution of air gap flux density of permanent magnet brushless motor is also analyzed.

Modal-frequency spectrum of magnetic flux density in air gap of permanent magnet motor

2014 ◽  
Vol 63 (1) ◽  
pp. 29-46
Author(s):  
Pawel Witczak ◽  
Witold Kubiak ◽  
Marcin Lefik ◽  
Jacek Szulakowski
Keyword(s):  
Permanent Magnet ◽  
Flux Density ◽  
Frequency Spectrum ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Permanent Magnet Motors ◽  
Modal Frequency ◽  
Time Stepping ◽  
Sinusoidal Shape ◽  
Flux Density Distribution

Abstract The classic relationships concerning the harmonic content in the air gap field of three-phase machines are presented in form of series of rotating waves. The same approach is applied to modeling of permanent magnet motors with fractional phase windings. All main reasons of non-sinusoidal shape of flux density distribution, namely, magnets’ shape and their placement, slotting, magnetic saturation and eccentricity are also related to their counterparts in modal-frequency spectrum. The Fourier 2D spectrum of time-stepping finite element solution is confronted with results of measurements, with special attention paid to accuracy of both methods

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