An equivalent winding factor larger than 1 by using flux barriers in the stator

2019 ◽  
Author(s):  
Johannes Walter Gerold ◽  
Dieter Gerling
Keyword(s):  
Winding Factor

The Use of Concentrated Windings for High-Power Synchronous Wind Generators

2021 ◽  
Vol 4 (4) ◽  
pp. 50-57
Author(s):  
Viktor N. ANTIPOV ◽  
◽  
Andrey D. GROZOV ◽  
Anna V. IVANOVA ◽  
◽  
...  
Keyword(s):  
Low Power ◽  
High Power ◽  
Synchronous Machines ◽  
Cogging Torque ◽  
Application Field ◽  
Main Application ◽  
Wind Generators ◽  
Winding Factor

Low-power machines were commonly considered as the main application field of concentrated windings. However, a lot of paper have recently been published, which address both the theory of these windings and specific cases of their application for large synchronous machines. The article presents an analysis of the parameters of concentrated windings having various configurations intended for use in high-power gear and gearless wind generators. In assessing the winding, not only the high winding factor value was taken into account, but also the star of slot EMFs, harmonic spectra of the MMFs and EMFs, the cogging torque component and torque pulsation under load, as well as emerging losses. It is shown that the well-known advantages of concentrated windings over distributed windings can be fully realized by choosing the appropriated numbers of slots and poles.

scholarly journals Considerations on Spatial Harmonics Due to the Winding Factor in a Multi-Speed Resolver

1997 ◽  
Vol 21 (4_2) ◽  
pp. 781-784 ◽  
Author(s):  
K. Masaki ◽  
K. Kitazawa ◽  
Y. Karasawa ◽  
H. Mimura ◽  
M. Nishizawa ◽  
...  
Keyword(s):  
Spatial Harmonics ◽  
Winding Factor

scholarly journals Application of Concentrated Windings for High-Power Synchronous Wind Generators

2020 ◽  
Vol 220 ◽  
pp. 01029
Author(s):  
V.N. Antipov ◽  
A.D. Grozov ◽  
A.V. Ivanova
Keyword(s):  
High Power ◽  
Electromotive Force ◽  
Direct Drive ◽  
Load Torque ◽  
Magnetomotive Force ◽  
Cogging Torque ◽  
Wind Generators ◽  
The Right ◽  
Performance Conditions ◽  
Winding Factor

The article analyzes the parameters of various configurations concentrated windings for application in high-power geared and direct drive wind generators. It is specified that the concentrated windings advantages over distributed ones can be fully realized by choosing the right values of pole pairs and the slots number. It is shown that the choice of the winding should take into account not only the highest winding factor, but also to the star of slots for the analysis of the harmonic contents of the magnetomotive force (MMF) and electromotive force (EMF), cogging torque and load torque pulsation. Windings with performance conditions Z=12+6k, 2p=Z ±2, k=0,1,2,3,…having an odd number of pole pairs are recommended for high-power wind generators.

scholarly journals A Study on a Slotless Brushless DC Motor with Toroidal Winding

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1881
Author(s):  
Ho-Young Lee ◽  
Seung-Young Yoon ◽  
Soon-O Kwon ◽  
Jin-Yeong Shin ◽  
Soo-Hwan Park ◽  
...  
Keyword(s):  
Flux Density ◽  
Analytical Method ◽  
Air Gap ◽  
Element Analysis ◽  
Tooth Structure ◽  
Brushless Dc ◽  
And Performance ◽  
Winding Angle ◽  
Winding Factor ◽  
Motor Structure

In this study we developed a brushless DC (BLDC) slotless motor with toroidal winding. The proposed toroidal winding is a method of winding a coil around a ring-type stator yoke in the circumferential direction. As there is no need for a slot or tooth structure, it can be designed with a slotless motor structure that is advantageous for vibration and noise. The basic principle of operation and motor characteristics of a slotless motor with toroidal winding were explained using an analytical method and finite element analysis (FEA). Further, the air gap flux density, winding factor, and back electromotive force (EMF) for changes in the winding angle and number of coil turns were calculated using the analytical method and compared with the FEA results. Finally, the resistance, back EMF, cogging torque, and performance of the prototype were measured and compared with the FEA results. The results show that the air gap flux density and winding factor were approximately the same with an error of <2%, while the back EMF had an error of ~10% from the analysis result. Thus, the proposed slotless motor provides a basic design for conveniently manufacturing brushless DC (BLDC) slotless motors with toroidal windings.

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