Open Access Open Access  Restricted Access Subscription or Fee Access

Air-Gap Magnetic Field Distribution in Outer Rotor PM Brushless DC Motors

K. Umadevi, Dr.M.Y. Sanavullah

Abstract


This paper presents geometric modeling techniques by (Finite Element Method Magnetics) FEMM which have been used for determination of the magnetic field inside the air gap of a Permanent-Magnet (PM) Outer Rotor Brushless DC (ORBLDC) Motors. These models offer the benefit of a fast computation and therefore they can be used as a common model in an optimization technique. Deliberate the magnetic fields inside the air gap numerically for the given slotted structure. This work can be applied in the design of PM motors where is a requirement to minimize noise and torque ripple, maximize efficiency and a continuing need for improvements in the accuracy and firmness of design calculations.

Keywords


Finite Element Method, Air Gap Field, Magnetic Analysis, Outer Rotor Brushless DC Motors

Full Text:

PDF

References


Yoon,T., “Stator design consideration of a brushless DC motor for robust rotor position detection in inductive sense start-up," IEEE Transactions on Magnetics, Vol. 42, No. 3, 453-459, March 2006.

Ms.K.Umadevi, Dr.M.Y.Sanavullah, “Finite Element Analysis Of Exterior (Outer) Rotor Permanent Magnet Brushless Dc (ERPMBLDC) Motor” , IJ-ETA-ETS, Vol. 3, ISSUE No. 1, 431-436, jan’10-june’10.

Ravaud, R., G. Lemarquand, V. Lemarquand, and C. Depollier,“The three exact components of the magnetic field created by a radially magnetized tile permanent magnet," Progress In Electromagnetics Research, PIER 88, 307-319, 2008.

Mazur, M., E. Sedek, and J. Mazur, “Propagation in a ferrite circular waveguide magnetized through a rotary four-pole magnetic field," Progress In Electromagnetics Research, PIER 68,1-13, 2007.

Faiz, J. and B. M. Ebrahimi, “Mixed fault diagnosis in three-phase squirrel-cage induction motor using analysis of air-gap magnetic field," Progress In Electromagnetics Research, PIER 64, 239-255, 2006.

Kim, U. and D. K. Lieu, “Effects of magnetically induced vibration force in brushless permanent-magnet motors," IEEE Transactions on Magnetic, Vol. 41, No. 6, 2164{2171, June 2005.

Wang, X. H., Q. F. Li, and S. H. Wang, “Analytical calculation of air-gap magnetic field distribution and instantaneous characteristics of brushless DC motors," IEEE Transaction on Energy Conversion, Vol. 18, No. 3, 424-432, September 2003.

Zhu, Z. Q., K. Ng, N. Schofield, and D. Howe, “Improved analytical modeling of rotor eddy current loss in brushless machines equipped with surface-mounted permanent magnets," IEE Proc. - Elect. Power Appl., Vol. 151, 641-650, 2004.

Rabinovici, R., “Magnetic field analysis of permanent magnet motors," IEEE Transactions on Magnetic, Vol. 32, No. 1, 265-269, January 1996.

Allied motion technologies inc, technology, North America: 1 (888) 392-5543, outer rotor brushless DC motors.

Ki-Yong Nam, Woo-Taik Lee, Choon-Man Lee and Jung-Pyo Hong, “Reducing Torque Ripple of Brushless DC Motor by Varying Input Voltage”, IEEE Transactions on Magnetics, vol. 42, no.4, pp.1307- 1310, Apr, 2006.

Sang-Hyun Park, Tae-Sung Kim, Sung-Chan Ahn and Dong-Seok Hyun, “A new current control algorithm for torque ripple reduction of BLDC motors,” The proceedings of IEEE Industrial Electronics Conference (IECON’01), volume 2, pp.1521-1526, Nov/Dec, 2001.

Xi Xiao, Yongdong Li, Meng Zhang and Min Li, “A novel control strategy for BLDC Motor with low torque ripples,” The proceedings of IEEE Industrial electronics Conference(IECON’01), pp.1660-1664,Nov/Dec, 2001.

Chang Gyun Kim, Joong Hui Lee, “A Commutation Torque Minimization Method for Brushless DC Motors with Trapezoidal Electromotive Force,” International Conference of Power Electronics, vol.1, pp.476-481, 1998.

I. Alcalá, A. Claudio, G. V. Guerrero, “Analysis of Propulsion systems in electric vehicle”, IX Conference on Electrical Engineering (CIE 2005), Mexico City, pp. 309 – 313, 9.09.2005.


Refbacks

  • There are currently no refbacks.