Title :
Performance comparison of wound field and permanent magnet excited electric machines
Author_Institution :
Univ. of Appl. Sci., Saabruecken, Germany
Abstract :
A thorough analysis of all dimensions of permanent magnet (PM) application in electric machines is carried out in the paper. Available literature on this topic is focused on their single advantage- the ability to generate magnetic field without electric current- and neglects their numerous drawbacks. Electrically conductive magnets dissipate losses when exposed to a variable air gap permeance in an electric machine. Constant flux of permanent magnets is powerless against effects of armature reaction in a synchronous machine. The uncontrollable price of rare- earth permanent magnets is far above the cost for any other material used in an electric machine.
Keywords :
air gaps; magnetic fields; permanent magnet machines; permanent magnets; synchronous machines; air gap permeance; electrically conductive magnets; magnetic field; permanent magnet excited electric machines; rare-earth permanent magnets; synchronous machine; wound field; Copper; Magnetic flux; Permanent magnets; Reactive power; Stator windings; Windings; Electromagnetic torque density; permanent magnets; wound field;
Conference_Titel :
Energy Conference (ENERGYCON), 2014 IEEE International
Conference_Location :
Cavtat
DOI :
10.1109/ENERGYCON.2014.6850414
