Active Output Voltage Regulation for an Ironless Axial-Flux PM Automotive Alternator With Electromechanical Flux Weakening

Author

Capponi, Fabio Giulii ; Terrigi, Roberto ; Caricchi, Federico ; Del Ferraro, Luca

Author_Institution

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

Volume

45

Issue

5

fYear

2009

Firstpage

1785

Lastpage

1793

Abstract

The aim of this paper is to present a solution for active output voltage regulation in permanent-magnet (PM) automotive alternators, through mechanical flux weakening. An axial-flux PM ironless machine is investigated, which is composed of two stators connected in series which can be shifted one with respect to the other, thus allowing a theoretically infinite constant power speed range. This paper focuses on the aspects related to layout, sizing, and control of the shifting mechanism, which are critical for accurate output voltage regulation. Experimental tests on a 2-kW prototype validate the capabilities of the proposed solution, both during steady-state and transient operating conditions.

Keywords

alternators; automotive components; permanent magnet generators; voltage control; active output voltage regulation; axial-flux PM ironless machine; electromechanical flux weakening; ironless axial-flux PM automotive alternator; mechanical flux weakening; permanent-magnet alternators; power 2 kW; stators; steady-state operating conditions; transient operating conditions; Axial-flux permanent-magnet (AFPM) machine; constant power speed range (CPSR); mechanical flux weakening; starter/alternator;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2009.2027552

Filename

5166460