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Effect of design variables on irreversible magnet demagnetization in brushless dc motor.
- Source :
-
Journal of Applied Physics . 5/15/2005, Vol. 97 Issue 10, p10Q510-1-10Q510-3. 3p. 1 Black and White Photograph, 1 Chart, 8 Graphs. - Publication Year :
- 2005
-
Abstract
- The large demagnetizing currents in brushless dc (BLdc) motor are generated by the short-circuited stator windings and the fault of a drive circuit. So, irreversible magnet demagnetization occurs due to the external demagnetizing field by these currents. In this paper, we deal with the effect of design variables on irreversible magnet demagnetization in BLdc motor through the modeling approach using a two-dimensional finite-element method (2D FEM). The nonlinear analysis of a permanent magnet is added to 2D FEM to consider irreversible demagnetization. As a result, it is shown that magnet thickness, teeth surface width, and rotor back yoke thickness are the most important geometrical dimensions of BLdc motor in terms of irreversible magnet demagnetization. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 97
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 100455562
- Full Text :
- https://doi.org/10.1063/1.1855272