Finite-element analysis of brushless DC motor considering freewheeling diodes and DC link voltage ripple

2003 ◽  
Vol 39 (5) ◽  
pp. 3274-3276 ◽  
Author(s):  
Tae Heoung Kim ◽  
Jae-Hak Choi ◽  
Kwang Cheol Ko ◽  
Ju Lee
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Element Analysis ◽  
Brushless Dc ◽  
Voltage Ripple

Magnetically Induced Vibration in an 8-Pole, 9-Slot Brushless DC Motor

1995 ◽  
Author(s):  
Thomas Y. Chuang ◽  
Dennis K. Lieu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Parametric Study ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Constant Force ◽  
Stress Concentrations ◽  
Element Analysis ◽  
Brushless Dc ◽  
Maxwell Stresses

Abstract A parametric study was conducted to determine the effect of motor geometry on the force imbalance in an 8-pole/9-slot motor. The study is based on a quasi-static finite element analysis in which the force calculations were made by integrating the Maxwell stresses along the center of the airgap. For small variations from the base motor geometry, the study revealed the following trends. The magnitude of the force imbalance decreases as the slot width decreases. The imbalance also decreases as the airgap length increases. A rotor/stator eccentricity introduces a constant force imbalance which increases proportionally to, and in the direction of, the eccentricity. As the size of the motor is scaled up uniformly, the mass increases faster than the imbalance. The results suggest that the force imbalance is caused predominantly by the stress concentrations at the corners of the stator teeth.

Efficiency Improvement of an Axial Flux Permanent Magnet Brushless DC Motor for LVAD Application

2011 ◽  
Vol 110-116 ◽  
pp. 4661-4668
Author(s):  
S. Neethu ◽  
K.S. Shinoy ◽  
A.S. Shajilal
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
The Novel ◽  
Axial Flux ◽  
Element Analysis ◽  
Brushless Dc ◽  
Permanent Magnet Brushless Dc

This paper presents the Finite Element Analysis (FEA) based design, optimization and development of an axial flux permanent magnet brushless DC motor for Left Ventricular Assist Device (LVAD). With the design objective of improving the existing motor's efficiency , different topologies of AFPM machine has been examined. Selection of optimal magnet frac-tion, Halbach arrangement of rotor magnets and the use of Soft Magnetic Composite (SMC) material for the stator core results in a novel motor with improved efficiency and torque profile. The results of the 3D Finite element analysis for the novel motor have been shown.Thermal analysis for the existing motor has also been done and the FEA results are compared with the analytical and experimental results.Finally the test results for the novel motor and the general conclusions are also discussed.

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