Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

The global decarbonization targets require increasingly higher levels of efficiency from the designers of electrical machines. In this context, the opportunity to employ magnetic or semi-magnetic wedges in surface-mounted permanent magnet machines with fractional-slot concentrated winding has been evaluated in this paper, with the aim to reduce the power losses, especially in the magnets. Since an analytical calculation is not sufficient for this evaluation, finite element methods with two different software have been employed, by using a model experimentally validated on a real motor. The effects of wedges with different values of permeability and different magnetization characteristics have been evaluated on flux density, back electromotive force, and inductances, in order to choose the more suitable wedge for the considered motor. Furthermore, a new wedge consisting of different portions of materials with different magnetic permeability values is proposed. The effects of both conventional and unconventional magnetic wedges were assessed to optimize the motor performance in all working conditions.

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Investigation of Winding Circuit Effect on Characteristics of Permanent Magnet Synchronous Machines with Fractional Slot Concentrated Winding

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.698.30 ◽

2014 ◽

Vol 698 ◽

pp. 30-34

Author(s):

Georgy B. Vialcev ◽

Dmitriy M. Toporkov ◽

Olga E. Gubareva

Keyword(s):

Permanent Magnet ◽

Synchronous Machines ◽

Permanent Magnet Synchronous Machines ◽

Fractional Slot Concentrated Winding ◽

Fractional Slot

Star-connected and delta-connected circuits of fractional slot concentrated winding in permanent magnets synchronous machines (SMPM) are described in the paper. Advantages and drawbacks of these winding circuit types are shown. Investigation results on the characteristics degradation in the machines with fractional slot concentrated windings owing to delta-connected circuit are presented.

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Effect of Local Tangential Force on Vibration Performance in Fractional-Slot Concentrated Winding Permanent Magnet Synchronous Machines

IEEE Transactions on Energy Conversion ◽

10.1109/tec.2018.2881043 ◽

2019 ◽

Vol 34 (2) ◽

pp. 1082-1093 ◽

Cited By ~ 4

Author(s):

Hua Lan ◽

Jibin Zou ◽

Yongxiang Xu ◽

Mingchuan Liu

Keyword(s):

Permanent Magnet ◽

Tangential Force ◽

Synchronous Machines ◽

Permanent Magnet Synchronous Machines ◽

Fractional Slot Concentrated Winding ◽

Vibration Performance ◽

Fractional Slot

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Permanent Magnet Synchronous Machines

Energies ◽

10.3390/en12142830 ◽

2019 ◽

Vol 12 (14) ◽

pp. 2830 ◽

Cited By ~ 1

Author(s):

Sandra Eriksson

Keyword(s):

Permanent Magnet ◽

Subject Area ◽

Synchronous Machines ◽

Permanent Magnet Machines ◽

Special Issue ◽

Permanent Magnet Synchronous Machines ◽

Hydro Power ◽

Brushless Dc Motors ◽

Research Fields ◽

Wide Range

Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and electrification of transports. This special issue contains the successful invited submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.

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