Analysis and minimization of torque ripple for variable flux reluctance machines

Bao, Jing; Gysen, B.L.J.; Boynov, K. O.; Paulides, Jjh Johannes; Bastiaens, K.; Lomonova, E.A.

doi:10.1109/iemdc.2017.8002258

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…• choice of the appropriate angular span of magnets in machines excited by permanent magnets [2,[5][6][7][8]; • making excitation magnets that are skewed [2,5]; • desymmetrization of the arrangement of magnets in the machine [4,9,10]; • choice of the shape of the magnets on the side of the air gap [7]; • making ferromagnetic pole pieces for excitation magnets with an appropriately selected angular span [6]; • construction of a machine with magnets embedded in the rotor ferromagnetic (IPMSM) [7]; • appropriate choice of the angular span of the stator or rotor teeth [11][12][13];…”

Section: Introductionmentioning

confidence: 99%

“…• appropriate choice of the angular span of the rotor poles (teeth) in reluctance machines [14,15]; • making slots in the stator or rotor that are skewed [3,4,11,[14][15][16][17]; • desymmetrization of the angular arrangement of rotor poles (teeth) in reluctance machines [4,10,11]; • choice of the shape of the face of the poles/teeth of the stator or rotor [18,19]; • making cuts in the stator teeth or inserting additional teeth [7,15,17]; • using an appropriate current power supply [12,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…A previous study [12] presented methods of minimizing the torque ripple for the DCEFSM. Based on the harmonics of the self-and mutual inductance of the field and armature windings, it was shown that the sixth harmonic dominates in the torque ripple.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reduction in the Cogging Torques in the DCEFSM Motor by Changing the Geometry of the Rotor Teeth

et al. 2022

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The paper presents the results of FEM 2D computational studies of a three-phase Direct Current Excited Flux Switching Machine (DCEFSM) electric motor with rotor teeth and stator teeth. The aim of the research was to minimize the cogging torque of the machine by changing the geometry of the rotor teeth and the size of the air gap between the stator and the rotor, with the operating torques unchanged. Computational studies were carried out on the influence of the width of the rotor teeth, the radius of the rounding of their corners, and the size of the air gap on the cogging torque and machine operating torques. The results of the calculations made it possible to select the dimensions of the rotor and the air gap in such a way that the maximum cogging torque was reduced more than six-fold, with the machine operating torques being unchanged. The calculations also showed that it is not possible to increase the value of the operational torques by further changes in the geometry of the rotor teeth and the size of the air gap of the machine.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reduction in the Cogging Torques in the DCEFSM Motor by Changing the Geometry of the Rotor Teeth

et al. 2022

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“…Based on the torque production mechanism of variable flux reluctance machines (VFRMs) illustrated in [11], a harmonic field current injection method is proposed for torque ripple reduction in 6/4-pole VFRMs in [12], the magnitude of the injected harmonic current can be calculated theoretically. Harmonic injections in field current and armature current are analyzed for torque ripple reduction in [13] yet the copper loss of the machine isn't a fixed value, which may lead to efficiency reduction. On this basis, harmonic injections in armature current with constant copper loss are analyzed by finite element analysis (FEA) in [14] to improve the torque performance, whereas the influence of rotor pole arc is still out of consideration.…”

Section: Introductionmentioning

confidence: 99%

Torque Performance Improvement of Doubly Salient Electromagnetic Machine by Harmonic Current Injection With Optimized Magnetomotive Force Ratio

et al. 2021

IEEE Access

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The doubly salient electromagnetic machine (DSEM) has simple and reliable structure while suffering from the problem of torque ripple due to the salient pole structure. In order to improve the torque performance, this paper proposes a collaborative optimization method of harmonic current injection and proportion of the armature magnetomotive force (MMF) and field MMF based on the optimized rotor pole arc coefficient. The theory of torque generation and the influence of rotor pole arc coefficient on torque characteristics are analyzed. The relationship between the copper loss and the total MMF is investigated. The influence of MMF proportion on the average torque and torque ripple is studied. The effect of harmonic current injection on torque performance is further analyzed on the basis of the optimized rotor pole arc coefficient. Finally, the 12/10-pole DSEM prototype is developed and the experiment is conducted to verify the analysis.INDEX TERMS Doubly salient electromagnetic machine, rotor pole arc coefficient, optimized magnetomotive force, torque ripple reduction, harmonic current injection.

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Geometric optimization Of Variable Flux Reluctance Machines For Full Electric Vehicles

Zuurbier

Fahdzyana

Hofman

et al. 2019

2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

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Analysis and minimization of torque ripple for variable flux reluctance machines

Cited by 4 publications

References 5 publications

Reduction in the Cogging Torques in the DCEFSM Motor by Changing the Geometry of the Rotor Teeth

Reduction in the Cogging Torques in the DCEFSM Motor by Changing the Geometry of the Rotor Teeth

Torque Performance Improvement of Doubly Salient Electromagnetic Machine by Harmonic Current Injection With Optimized Magnetomotive Force Ratio

Geometric optimization Of Variable Flux Reluctance Machines For Full Electric Vehicles

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