NDLI: A Study on a Slotless Brushless DC Motor with Toroidal Winding

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A Study on a Slotless Brushless DC Motor with Toroidal Winding

Content Provider	MDPI
Author	Lee, Ho-Young Yoon, Seung-Young Kwon, Soon-O Shin, Jin-Yeong Park, Soo-Hwan Lim, Myung-Seop
Copyright Year	2021
Description	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.
Starting Page	1881
e-ISSN	22279717
DOI	10.3390/pr9111881
Journal	Processes
Issue Number	11
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2021-10-21
Access Restriction	Open
Subject Keyword	Processes Brushless Dc Motor (bldc) Slotless Motor Toroidal Winding Lumped-parameter Magnetic Circuit Back Electromotive Force (emf) Cogging Torque Winding Factor Bldc Six-step Drive
Content Type	Text
Resource Type	Article

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