“Fault-tolerant control of a multi-phase machine based on multi machine description” Lille, 13 - 14 November 2006

This form will be used for the program booklet, the Internet URL of the workshop and the CD. Some abstracts are already available on http://l2ep.univ-lille1.fr/iw-mces.htm

Title “Fault-tolerant control of a multi-phase machine based on multi machine description” (experimental demonstration session)

Contributors Eric SEMAIL (http://eric.semail.free.fr/), is graduated in 1986 from the Ecole Normale Superieure, in France. He received Ph.D. degree in 2000 on « Tools and studying method of polyphase electrical systems, Generalization of the space vector theory ». He became Associate Professor at Engineering school of ENSAM in 2001 (http://www.ensam.fr/). His research activities developed at L2EP (http://l2ep.univ-lille1.fr/) are about design and control of multiphase drives. More generally he studies Multi-machine and Multi-converter systems. Automotive, Wind energy and Marine electrical propulsion are concerned by this activity. Xavier KESTELYN (http://xavier.kestelyn.free.fr/) was born in Dunkerque, France, in 1971. He received the M.S. degree in 1999 and Ph.D. degree in 2003 from the University of Lille, France, both in Electrical Engineering. From 1994 to 2004, he was a teacher in Electrical Engineering in the secondary school. Since 2004, he is an assistant professor in Electrical Engineering at Ecole Nationale Supérieure d’Arts et Métier in Lille, France. His main interests include modelling and control of multiphase machines and multidrive systems. Fabrice LOCMENT ([email protected]), is graduated in 2003 from the engineering school of Polytech’Lille, in France. He teaches since September 2006 at Engineering school of ENSAM (http://www.ensam.fr/). His research activities developed at L2EP (http://l2ep.univ-lille1.fr/) are about design and control of multiphase drives.

Objective This presentation deals with control in fault operation of a seven-phase Permanent Magnet Synchronous Axial Flux Machine supplied by a seven-leg Voltage Source Inverter (VSI).

Outline Using a Multi-Machine description, a seven-phase machine which presents a special ability to be controlled with only five phases supplied has been designed. At first the seven-phase vector-controlled drive is presented. The torque and and the currents are then examined when one or two phases are opened. In order to reduce the observed torque ripples, a specific control deduced from the Multi-Machine modelling is presented and experimental results on torque show the improvements.

uur uur di M1 uuur uuur R M1 i M1 + L M1 = v M1 − e M1 dt vM1 vBUS

vM2

uuur uur e M1.i M1 = TM1.Ω iM1

iM1

iM2

M1

TEM = TM1 + TM 2 + TM3

TM1 Ω TM2

eM1

Ω

TEM

SM

M2

SE iBUS

vM3

iM2

iM3

Ω TM3

eM2

M3 m

iM3

eM3

vM1REF

Ω

T

FΩ + J

Ω

dΩ = TEM − T dt

TM1REF iM1REF

vM2REF

TM2REF

TEMREF

iM2REF vM3REF

TM3REF iM3REF

7-leg Voltage Source Inverter

7-phase axial-flux machine

KR

Dspace 1005 controller board

DC drive

Supply electronic charge

Experimental set-up

References F. Locment, E. Semail, F. Piriou, “Design and Study of a Multi-phase Axial-flux machine”, IEEE Transactions on Magnetics, Vol. n°42, n°4, april 2006, pp. 1427-1430. F. Locment, E. Semail, X. Kestelyn, A. Bouscayrol, “Control of a seven-phase axial flux machine designed for fault operation “, IECON’06, IEEE International Conference On Industrial Applications of Electronics, Conservatoire National des Arts & Métiers – Paris – France, November 7 – 10, 2006.