Torque ripple minimization of reluctance synchronous machines by continuous and discrete rotor skewing

Synchronous Reluctance machines are on the line to significant torque ripple development if they are not carefully designed. Since torque ripple causes vibrations and noise in electrical machines it is generally unwanted. In servo-applications with a great speed and position control importance, the torque ripple of the motor also is a main performance criterium and its reduction needs to gain special attention. In this paper the influence of the flux barrier shape and width as well as the flux barriers position on the torque ripple is studied. In order to reduce torque ripple, the effect of continuous and discrete rotor skewing of multiple flux barrier rotor is investigated by means of finite element method investigations which include all saturation and cross magnetization effects. As a result a design method to significantly reduce the torque ripple with slight effect on the average torque is shown.

[1]  Reza Rajabi Moghaddam,et al.  Synchronous Reluctance Machine (SynRM) in Variable Speed Drives (VSD) Applications , 2011 .

[2]  Shigeo Morimoto,et al.  Torque ripple improvement for synchronous reluctance motor using an asymmetric flux barrier arrangement , 2003 .

[3]  Maarten J. Kamper,et al.  Effect of stator chording and rotor skewing on performance of reluctance synchronous machine , 2002 .

[4]  Alfredo Vagati,et al.  Design criteria of high performance synchronous reluctance motors , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[5]  T. Hamiti,et al.  Comparison Between Finite-Element Analysis and Winding Function Theory for Inductances and Torque Calculation of a Synchronous Reluctance Machine , 2007, IEEE Transactions on Magnetics.

[6]  Gianmario Pellegrino,et al.  Optimal number of rotor parameters for the automatic design of Synchronous Reluctance machines , 2014, 2014 International Conference on Electrical Machines (ICEM).

[7]  Freddy Magnussen,et al.  Novel rotor design optimization of synchronous reluctance machine for high torque density , 2012 .

[8]  Nicola Bianchi,et al.  Sensitivity analysis of torque ripple reduction of synchronous reluctance and interior PM motors , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[9]  Marco Ferrari,et al.  Design of Synchronous Reluctance Motor for Hybrid Electric Vehicles , 2015, IEEE Transactions on Industry Applications.

[10]  Xibo Yuan,et al.  IET international conference on Power Electronics, Machines and Drives (PEMD) , 2014 .

[11]  G. Franceschini,et al.  Design of low-torque-ripple synchronous reluctance motors , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[12]  Valéria Hrabovcová,et al.  Design of Rotating Electrical Machines , 2009 .

[13]  C. Cossar,et al.  Design of a synchronous reluctance motor drive , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[14]  Jorma Haataja,et al.  A comparative performance study of four-pole induction motors and synchronous reluctance motors in variable speed drives , 2003 .

[15]  T. Lubin,et al.  A Simple and Efficient Tool for Design Analysis of Synchronous Reluctance Motor , 2008, IEEE Transactions on Magnetics.

[16]  Rik W. De Doncker,et al.  Torque ripple reduction in Reluctance Synchronous Machines using an asymmetric rotor structure , 2014 .

[17]  Timothy J. E. Miller,et al.  Maximising the saliency ratio of the synchronous reluctance motor , 1993 .

[18]  Roland Schinzinger,et al.  Conformal Mapping: Methods and Applications , 1991 .

[19]  Antonino Fratta,et al.  AC motors for high-performance drives: a design-based comparison , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[20]  Jung Ho Lee,et al.  Rotor Design on Torque Ripple Reduction for a Synchronous Reluctance Motor With Concentrated Winding Using Response Surface Methodology , 2006, IEEE Transactions on Magnetics.

[21]  N. Bianchi,et al.  Rotor flux-barrier design for torque ripple reduction in synchronous reluctance motors , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[22]  M. Sanada,et al.  Torque ripple improvement for synchronous reluctance motor using asymmetric flux barrier arrangement , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[23]  N. Bianchi,et al.  Torque Harmonic Compensation in a Synchronous Reluctance Motor , 2008, IEEE Transactions on Energy Conversion.

[24]  A. Fratta,et al.  Evaluation of torque ripple in high performance synchronous reluctance machines , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[25]  Leonard Livadaru,et al.  Study of a skewed rotor cage synchronous reluctance motor using finite element analysis , 2013, 2013 8TH INTERNATIONAL SYMPOSIUM ON ADVANCED TOPICS IN ELECTRICAL ENGINEERING (ATEE).