Axial-flux PM starter/alternator machine with a novel mechanical device for extended flux weakening capabilities

Author

Del Ferraro, L. ; Caricchi, F. ; Capponi, F. Giulii ; De Donato, G.

Author_Institution

Dept. of Electr. Eng., La Sapienza Univ., Rome, Italy

Volume

3

fYear

2004

Firstpage

1413

Abstract

In modern vehicles, the demand for on-board electric energy generation is rapidly growing in order to satisfy new requirements for passengers comfort and safety. This growth, which is predicted to reach 6 kW in the very next years, is forcing manufacturers to explore new solutions concerning the whole electrical system inside the vehicle. In particular, novel topologies of alternators are under research since the currently used Lundell type (claw-pole) alternator is reaching its power limits. In this paper an original torque dependant mechanical device is proposed in order to extend the speed range of an axial flux PM machine. This device displaces the rotors realizing a mechanical flux weakening with constant output power in generation. Simulations and experimental tests on a prototype realized in the lab are fully discussed.

Keywords

alternators; electric vehicles; magnetic flux; permanent magnet machines; torque; 6 kW; Lundell type alternator; PM; axial-flux machine; electric energy generation; electrical system; mechanical device; mechanical flux weakening; permanent magnet starter; rotors; torque; Alternators; Electrical safety; Manufacturing; Power generation; Rotors; Testing; Topology; Torque; Vehicle safety; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE

ISSN

0197-2618

Print_ISBN

0-7803-8486-5

Type

conf

DOI

10.1109/IAS.2004.1348607

Filename

1348607