Torque Ripple Analysis of a PM Brushless DC Motor Using Finite Element Method

2004 ◽  
Vol 19 (1) ◽  
pp. 40-45 ◽  
Author(s):  
M. Dai ◽  
A. Keyhani ◽  
T. Sebastian
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Torque Ripple ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Element Method

Comparison of Performance between Concentrated and Rhombic Windings for a Slotless Brushless DC Motor

2011 ◽  
Vol 130-134 ◽  
pp. 2832-2835
Author(s):  
Chang Chou Hwang ◽  
Ping Lun Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fem Analysis ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
The Finite Element Method ◽  
Brushless Dc ◽  
Three Phase ◽  
Element Method

This paper presents and compares the performance of a two-pole, three-phase slotless brushless DC motor with two types of winding configuration: concentrated and rhombic windings. Application of the finite element method (FEM) analysis to their performance calculations is performed.

scholarly journals Simulation of Outer Rotor Permanent Magnet Brushless DC Motor Using Finite Element Method for Torque Improvement

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Uma Devi Kumaravelu ◽  
Sanavullah Mohamed Yakub
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Outer Rotor ◽  
Novel Method ◽  
Permanent Magnet Brushless Dc ◽  
Torque Development ◽  
Element Method

A method of simulation and modeling outer rotor permanent magnet brushless DC (ORPMBLDC) motor under dynamic conditions using finite element method by FEMM 4.2 software package is presented. In the proposed simulation, the torque developed at various positions of the rotor, under a complete cycle of excitation of the stator, is analysed. A novel method of sinusoidal excitation is proposed to enhance the overall torque development of ORPMBLDC motor.

scholarly journals Unbalanced Magnetic Pull Effect on Stiffness Models of Active Magnetic Bearing due to Rotor Eccentricity in Brushless DC Motor Using Finite Element Method

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Bangcheng Han ◽  
Shiqiang Zheng ◽  
Xiquan Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Angular Position ◽  
Dc Motor ◽  
Magnetic Bearing ◽  
Active Magnetic Bearing ◽  
Brushless Dc Motor ◽  
Unbalanced Magnetic Pull ◽  
Brushless Dc ◽  
Control Current

We firstly report on an investigation into the unbalanced magnetic pull (UMP) effect on the static stiffness models of radial active magnetic bearing (RAMB) in brushless DC motor (BDCM) in no-loaded and loaded conditions using the finite element method (FEM). The influences of the UMP on the force-control current, force-position, current stiffness, and position stiffness of RAMB are clarified in BDCM with 100 kW rated power. We found the position stiffness to be more susceptible to UMP. The primary source of UMP is the permanent magnets of BDCM. In addition, the performance of RAMB is affected by the UMP ripples during motor commutation and also periodically affected by the angular position of rotor. The characteristic curves of RAMB force versus control current (or rotor position) and angular position of rotor affected by the UMP are given. The method is useful in design and optimization of RAMB in magnetically suspended BDCMs.

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