Advanced SearchSearch Tips
Analytical Analysis of Cogging Torque in Motors of Permanent MagneticType
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Analytical Analysis of Cogging Torque in Motors of Permanent MagneticType
Go, Hong-Seok; Kim, Gwang-Jun;
  PDF(new window)
One of the principal sources of vibration and noise in permanent magnetic machines is cogging torque, which is induced by interaction between the rotor poles and the stator teeth. For its analysis, using finite element analysis is very time consuming and the calculation of performance factors is extremely sensitive to the discretization. Especially, Maxwell stress tensor method is sensitive to the location of integral path. In this paper, a cogging permeance fuction is defined and replaced by the straight line. And it is assumed that the flux density acting on the stator's tooth side is the euqal to the flux density of the slot area. Using this definition and assumption, analytical calculation of cogging torque is presented and validated. And several reduction method is introduced.
Cogging Torque;Permanent Magnet;Maxwell Stress Tensor;Flux Density;Electric Machine;
 Cited by
코깅 토크의 영향 저감을 위한 서보 모터 적응제어,이수한;허상진;신규현;

한국정밀공학회지, 2005. vol.22. 6, pp.70-75
Rahman B. S. and Lieu D. K., 1991, 'The Origin of Permanent Magnet Induced Vibration in Electric Machines,' ASME Journal of Vibration and Acoustic, pp. 476-481

황상문, 1998, '전기조향장치용 BLDC 모터 내의 코킹토크 저감을 위한 설계 기술 개발,' 한국자동차공학회논문집, Vol. 6, No. 3, pp. 106-114

Jaime De La Lee and Boules N., 1989, 'Torque Production in Permanet-Magnetic Synchronous Motors,' IEEE Trans. IA, Vol. 25, pp. 107-112 crossref(new window)

Howe D. and Zhu Z.Q., 1992, 'The Influence of Finite Element Discretisation on the Prediction of Cogging Torque,' IEEE Trans. Magn., Vol.28, pp. 1080-1083 crossref(new window)

Marinescu M. and N. Marinescu, 1988, 'Numerical Computation of Torques in Permanent Magnet Motors by Maxwell Stresses and Energy Method,' IEEE Trans. Magn., Vol. 24, pp. 463-465 crossref(new window)

Wiegnall A. N., Gilbert A. J. and S.J. Yang, 1988, 'Calculation of Fprces on Magnetised Ferrous Cores Using the Maxwell Stress Method,' IEEE Trans. Magn., Vol. 24, pp. 459-462 crossref(new window)

Boules N., 1985, 'Prediction of No-Load Flux Density Distribution,' IEEE Trans. IA., Vol. 21, pp. 633-643 crossref(new window)

Zhu Z. Q., Howe D., Ekkehard Bolte, and Ackermann B., 1993, 'Instaneous Magnetic Field Distribution in Brushless Permanent Magnet DC Motors, Part I: Open Circuit Field,' IEEE Trans. Magn., Vol. 29, pp. 124-135 crossref(new window)

Zhu Z. Q. and Howe D., 1992, 'Analytical of the Cogging Torque in Radial-Field Permanent Magnet Brushless motors,' IEEE Trans. Magn., Vol. 28, pp. 1371-1374 crossref(new window)