A bi-harmonic five-phase SPM machine with low ripple torque for marine propulsion
Communication avec acte
Abstract
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 that makes possible high value of third harmonic current injection. Thus the machine performance can be improved in terms of average torque, speed range, losses control and torque quality, this last feature being the scope of the paper. As low ripple torques are wanted at low speed, the magnet layer is defined to reduce the cogging torque and to make third harmonic current injection increasing average torque and reducing pulsating torque in the same time. According to a selection procedure based on the numerical simulations of a high number of machines, it appears that designing the rotor with two identical radially magnetized magnet that cover two-third the pole arc allows to reach this goal. Referring to an equivalent three-phase machine, the torque ripple level of the bi-harmonic five-phase machine is more than three times lower, thus being obtained with a simple control strategy that aims at achieving constant currents in the rotating frames. The time simulations of the drive confirm the significant reduction of the speed oscillation, especially at low speed.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Communication avec acteZAHR, Hussein; SEMAIL, Eric; ASLAN, Bassel; SCUILLER, Franck (IEEE, 2016)The paper studies the impact of first and third current-harmonic repartition in a five-phase Permanent Magnet machine whose Electromotive Forces (emfs) have first and third harmonics of the same amplitude. With a five-phase ...
-
Article dans une revue avec comité de lectureSCUILLER, Franck; BECKER, Florent; ZAHR, Hussein; SEMAIL, Eric (Institute of Electrical and Electronics Engineers, 2020)If multi-phase machines equipped with tooth concentrated winding with half a slot per pole and per phase offer interesting characteristics (simplified manufacturing, no space subharmonic, fault-tolerant ability), their low ...
-
Communication avec acteMEKAHLIA, Abdelhak; SEMAIL, Eric; SCUILLER, Franck; ZAHR, Hussein (IEEE, 2020)Multiphase induction machines are advantageous regarding speed range extension in comparison with three-phase induction machines. This paper investigates how to choose the connection between stator phases for a multiphase ...
-
Article dans une revue avec comité de lectureMEKAHLIA, Abdelhak; SEMAIL, Eric; SCUILLER, Franck; ZAHR, Hussein (MDPI, 2020)For three-phase induction machines supplied by sinusoidal current, it is usual to model the n-bar squirrel-cage by an equivalent two-phase circuit. For a multiphase induction machine which can be supplied with different ...
-
Communication avec acteZAHR, Hussein; SCUILLER, Franck; SEMAIL, Eric (2016)In this paper, the possibility of designing a fivephase Surface-mounted Permanent Magnet (SPM) machine with 20 slots and 8 poles for a low power marine propulsion system is examined. Due to its particular winding and surface ...