A Combined Wye-Delta Connection to Increase the Performance of Axial-Flux PM Machines With Concentrated Windings

Author

Vansompel, Hendrik ; Sergeant, Peter ; Dupré, Luc ; van den Bossche, Adrien

Author_Institution

Dept. of Electr. Energy, Syst. & Autom., Ghent Univ., Ghent, Belgium

Volume

27

Issue

2

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

403

Lastpage

410

Abstract

In this paper, a combined wye-delta connection is introduced and compared with a conventional wye-connection of a concentrated winding. Because the combined wye-delta connection has a higher fundamental winding factor, the output torque is higher for the same current density when a sinusoidal current is imposed. As the combined wye-delta connection has only a minor influence on the losses in the machine, the efficiency of the machine is also increased. The combined wye-delta connection is illustrated in detail for an axial-flux permanent-magnet synchronous machine with a rated power of 4 kW at a fixed speed of 2500 r/min, using finite element computation and measurements on a prototype machine.

Keywords

current density; finite element analysis; losses; machine windings; permanent magnet machines; synchronous machines; torque; axial-flux PM machines; axial-flux permanent-magnet synchronous machine; combined wye-delta connection; concentrated windings; current density; finite element computation; fundamental winding factor; machine efficiency; machine losses; power 4 kW; prototype machine; sinusoidal current; Coils; Magnetic flux; Prototypes; Stator windings; Torque; Windings; Axial-flux machine; combined wye-delta connection; concentrated winding; permanent-magnet machines; winding factor;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/TEC.2012.2184114

Filename

6151817