[W-MO-13] Evaluation of a 2D Brush Motor Analysis Accounting for 3D Geometry

Sign in to download the data

Download PDF


As brush motors are cost efficient and do not require control circuits, these familiar DC motors are used in a wide range of applications, from toys to industrial products.
Though brush motors have a relatively simple operating mechanism, performing an analysis on them is difficult, and the following items pose challenges.
 - Since current flows by mechanical contact between a brush and a commutator, the model must take this brush-commutator contact into account.
 - The axis length of the rotor core, magnet, and housing are all different, so magnetic flux in the axial direction cannot be ignored.
 - Because the housing is thin, magnetic saturation has a large effect, leading to an increase in magnetic flux in the axial direction.
In this applied case, the structure of a 2D analysis model accounting for 3D geometry is evaluated through the comparison with a 3D analysis model. The modeling validity is proved by comparing these results.

Search Filter

  • All Categories