Title :
A simple core structure for small axial-flux PMSGs
Author :
Wanjiku, J.G. ; Jagau, H. ; Khan, M.A. ; Barendse, P.
Abstract :
This paper presents the performance of a 375W axial-flux generator with a parallel-teeth stator core. One of the main set-backs in AFPM machines is the manufacture of stator steel cores. This can be solved by adopting a yokeless parallel-teeth stator. This stator structure is discussed and its performance is compared with the trapezoidal-teeth topology. The two configurations are analyzed in FEA and their performances are in agreement. Their back-EMFs and efficiencies were 17V and 82% respectively. In addition the parallel-teeth stator topology reduces cogging torque inherently. Its tooth-structure is modular in design which eases the rewinding of coils. Experimental results on back-EMF, voltage regulation and efficiency are also presented, i.e. 17.9V and 15.2V at a rated current of 10A at an efficiency of 80%. Further FEA analysis on torque ripple performance, experimental results on the segregation of core losses and EMF harmonics and temperature response of the machine are included in the paper.
Keywords :
coils; cores; electric potential; finite element analysis; losses; permanent magnet generators; stators; steel; synchronous generators; torque; wind power plants; AFPM machines; FEA; PMSG; axial flux generator; back EMF; coils; core losses; power 375 W; stator steel cores; torque ripple performance; voltage 17 V; yokeless parallel teeth stator; Forging; Rotors; Stator cores; Stator windings; Topology; Torque; Cogging torque; Finite element analysis; Losses; Machine performance; Teeth structure; Wind energy;
Conference_Titel :
Electric Machines & Drives Conference (IEMDC), 2011 IEEE International
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4577-0060-6
DOI :
10.1109/IEMDC.2011.5994833
