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Fault-tolerant control of a multi-phase machine based on multi machine description

Contributors

Eric SEMAIL

Xavier KESTELYN

Fabrice LOCMENT

 

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.

Fig. 1: EMR of the seven-phase drive


Fig. 2: 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. 42, no. 4, April 2006, pp. 1427-1430.

F. Locment, E. Semail, X. Kestelyn, A. Bouscayrol,
"HControl of a seven-phase axial flux machine designed for fault operation",
IEEE-IECON'06,
Paris, November 2006.


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