Magnet Shape Optimization to Reduce Pulsating Torque for a Five-Phase Permanent-Magnet Low-Speed Machine
TypeArticles dans des revues avec comité de lecture
Five-phase Surface-Mounted Permanent Magnet (SMPM) machines can inherently produce a smooth electromagnetic torque which can be increased when using third harmonic current injection. To really take advantage of these characteristics, the rotor magnets can be shaped in order to obtain a back-emf with large third harmonic term. This is the scope of the paper. For the design specifications of a low speed marine propulsion machine, the following objective must be achieved: to significantly mitigate the pulsating torque without reducing the average torque bearing in mind the solution where the rotor is made with full pole-pitch magnets. An analytical field computation, called equivalent coil method, is developed in order to quicly explore the magnet geometries. Thus a procedure to optimize small trapezoid notches at the surface of the pole magnets is performed. Referring to the classical fully pole-pitch magnet shape, the solution found allows a substantial reduction of the pulsating torque without reducing the torque density. Furthermore, with regard to an equivalent three-phase machine, for the same copper losses, the average torque of the optimized five-phase machine can be potentially higher if the third harmonic current injection is implemented.
Files in this item
Showing items related by title, author, creator and subject.
Rough Design of a Double-Stator Axial Flux Permanent Magnet Generator for a Rim-Driven Marine Current Turbine DJEBARRI, Sofiane; CHARPENTIER, Jean-Frederic; SCUILLER, Franck; BENBOUZID, Mohamed; GUEMARD, Sylvain (IEEE, 2012)This paper deals with the rough design of a Double-Stator Axial Flux Permanent Magnet Machine (DSAFPM) for a rim-driven Marine Current Turbine (MCT). The DSAFPM machine will be compared to a previously developed and realized ...
SCUILLER, Franck; SEMAIL, Eric; CHARPENTIER, Jean-Frederic; CLENET, Stéphane (WSEAS, 2004)Multi-phase motors are widely used in marine propulsion. In this paper, a Multi-machine modeling of Surface Mounted PM motors is presented and applied to a 5-phase one. The latter is proved to be equivalent to a set of ...
SCUILLER, Franck; ZAHR, Hussein; SEMAIL, Eric (2017)This paper addresses the design of a bi-harmonic five-phase Surface-mounted Permanent Magnet (SPM) machine for marine propulsion. The bi-harmonic characteristic results from the particular 20 slots-8 poles configuration ...
SCUILLER, Franck; ZAHR, Hussein; SEMAIL, Eric (IEEE, 2016)Abstract—In this paper, the study of the torque and power versus speed characteristics for a family of five-phase Surface-mounted Permanent Magnet (SPM) machine is carried out. With considering hypotheses (linear magnetic ...
Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating Swell Effect ZHOU, Zhibin; SCUILLER, Franck; CHARPENTIER, Jean-Frederic; BENBOUZID, Mohamed; TANG, Tianhao (IEEE, 2013)Variations of marine current speed may lead to strong fluctuations in the power extracted by a marine current turbine (MCT). During short-time period, swell effect is the main cause for the current speed variations. ...