Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2009.2027552
