Analytical Calculation of Magnetic Field and Cogging Torque in Surface-Mounted Permanent Magnet Machines Accounting for Any Eccentric Rotor Shape

Zhou, Yu; Li, Huaishu; Meng, Guangwei; Zhou, Shi; Cao, Qing

doi:10.1109/tie.2014.2369458

Cited by 123 publications

(81 citation statements)

References 20 publications

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“…Slot effect can be reduced by many different methods, such as skewing, magnet pole pitch optimization, magnet pole shape optimization, fractional slot/pole construction, stator core optimization, magnet shift, employing notches in the stator teeth, closed stator slots, etc. [6][7][8][9][10][11]. The end effect is caused by the finite length of the primary and secondary sides.…”

Section: Introductionmentioning

confidence: 99%

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Zhao

Liu

et al. 2017

IEEE Trans. Ind. Electron.

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Section: Introductionmentioning

confidence: 99%

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Zhao

Liu

et al. 2017

IEEE Trans. Ind. Electron.

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“…Many methods for reducing the cogging torque have been proposed, such as the slot-skewing or rotor step-skewed has been put forward in [2]- [4], po le-arc and magnet surface shape optimization has been presented in [5]- [8], magnet segmentation and shifting has been conducted in [9]. However, the mass-produced PM machines adopting those method above still have large cogging torque due to the manufacturing tolerances.…”

Section: Introductionmentioning

confidence: 99%

Analysis of cogging torque in surface permanent magnet machine with manufacturing tolerances

Song

et al. 2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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This paper investigates the production tolerances and variations of the lamination and permanent magnet on the cogging torque of the surface permanent magnet (S PM) machine with mass production. The finite element analysis (FEA) and experiment contrasted analysis method is adopted to deal with the additional component cogging torque, of the 12 slots 10 poles combination S PM machine, caused by production variation of the magnet, stator and rotor lamination. Its reveal that the eccentricity has small effect on the cogging torque, however, the manufacturing tolerances of lamination and inconsistency of permanent magnet have more significant influence on the cogging torque. This paper also propose the method by successively rotating each lamination of stator and rotor to suppress the additional components of the cogging torque.

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“…Usually, the numerical methods are very good for the adjustment and validation of the design. Furthermore, the results which are obtained by numerical methods may be not accurate to calculate cogging torque and unbalanced magnetic force [4,5] since it is sensitive to the FE meshes. Indeed, the motor performance can be obtained by the analytical methods of field computation based on the sufficient hypotheses [7].…”

Section: Introductionmentioning

confidence: 99%

Improved Method for Calculating Magnetic Field of Surface-Mounted Permanent Magnet Machines Accounting for Slots and Eccentric Magnet Pole

Zhou¹,

Li²,

Wang³

et al. 2015

Journal of Electrical Engineering and Technology

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-This paper presented an improved analytical method for calculating the open-circuit magnetic field in the surface-mounted permanent magnet machines accounting for slots and eccentric magnet pole. Magnetic field produced by radial and parallel permanent magnet is equivalent to that produced by surface current according to equivalent surface-current method of permanent magnet. The model is divided into two types of subdomains. The field solution of each subdomain is obtained by applying the interface and boundary conditions. The magnet field produced by equivalent surface current is superposed according to superposition principle of vector potential. The investigation shows harmonic contents of radial flux density can be reduced a lot by changing eccentric distance of eccentric magnet poles compared with conventional surface-mounted permanent-magnet machines with concentric magnet poles. The FE(finite element) results confirm the validity of the analytical results with the proposed model.

show abstract

Analytical Calculation of Magnetic Field and Cogging Torque in Surface-Mounted Permanent Magnet Machines Accounting for Any Eccentric Rotor Shape

Cited by 123 publications

References 20 publications

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

Analysis of cogging torque in surface permanent magnet machine with manufacturing tolerances

Improved Method for Calculating Magnetic Field of Surface-Mounted Permanent Magnet Machines Accounting for Slots and Eccentric Magnet Pole

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