Title :
Axial-Flux Hybrid-Excitation Synchronous Machine: Analysis, Design, and Experimental Evaluation
Author :
Capponi, F. Giulii ; De Donato, G. ; Borocci, G. ; Caricchi, F.
Author_Institution :
Dept. of Astronaut., Electr. & Energetic Eng, Univ. of Roma “La Sapienza, Rome, Italy
Abstract :
This paper presents an axial-flux machine with hybrid excitation (HE), in which the flux linkage can be regulated in an extremely wide range by using a rotating excitation winding. This machine shows a theoretically infinite constant power speed range and also exhibits a high degree of fault tolerance against uncontrolled generator operation. The machine has a single-stator double-rotor topology, with one rotor mounting permanent magnets and the other supporting the excitation winding. After a review of the state of the art of HE machines, this paper examines the principle of operation of this machine. Subsequently, a prototype is designed, analyzed with finite-element analysis, and built. Finally, experimental results are reported to confirm the theoretical predictions and the benefits and drawbacks of this novel topology.
Keywords :
fault tolerance; finite element analysis; permanent magnet machines; rotors; stators; synchronous machines; HE machines; axial flux hybrid excitation synchronous machine; double rotor topology; fault tolerance; finite element analysis; flux linkage; permanent magnet; rotating excitation winding; rotor losses; single stator topology; uncontrolled generator operation; Couplings; Magnetic flux; Rotors; Stator windings; Torque; Windings; Axial flux; cogging torque; constant power speed range; eddy current; finite-element analysis (FEA); hybrid excitation (HE); permanent magnet; rotor losses;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2014.2303253
