Title :
Analysis and comparison of axial-flux permanent-magnet brushless-DC machines with fractional-slot concentrated-windings
Author :
Jafari-Shiadeh, S.M. ; Ardebili, Mohammad
Author_Institution :
Dept. of Electr. & Comput. Eng., K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
This paper presents study of axial-flux permanent-magnet machines (AFPMMs) with fractional-slot concentrated-windings for brushless-DC (BLDC) operation. Four different AFPMMs are designed for in-wheel direct-driven electric vehicle, and are compared to study the effect of layer numbers, pole/slot combinations, and tooth widths on cogging torque, fault tolerance, and BLDC operation. As AFPMMs are inherently three-dimensional machines and modeling of them is so time-consuming, an accurate analytical model is used to predict the no load air-gap flux density distribution, flux-linkage, back-EMF, and cogging torque. The results are verified by three-dimensional finite-element (3-D FE) simulation.
Keywords :
brushless DC motors; finite element analysis; machine windings; permanent magnet machines; 3D FE simulation; AFPMM; BLDC machine operation; air-gap flux density distribution; axial-flux permanent-magnet brushless-DC machines; back-EMF; cogging torque; fault tolerance; flux-linkage; fractional-slot concentrated-windings; in-wheel direct-driven electric vehicle; three-dimensional finite-element simulation; three-dimensional machines; Air gaps; Barium; Forging; Torque; Windings; Zirconium; analytical model; axial-flux permanent-magnet machine; back-EMF; brushless-dc; fractional-slot; three-dimensional finite-element (3-D FE);
Conference_Titel :
Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2013 4th
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-4481-4
Electronic_ISBN :
978-1-4673-4483-8
DOI :
10.1109/PEDSTC.2013.6506676
