Lumped thermal model for the multi‐layer switched reluctance motor

The multi-layer switched reluctance motor (SRM) is a special type of the SRM which can be utilised appropriately in high-power applications such as electric vehicle (EV). Thermal modelling of the multi-layer SRM is considered for the first time in the present study and a lumped parameter thermal model is introduced for quick prediction of temperature rise in this motor. In the introduced lumped thermal model, independent thermal networks are considered for different parts of the machine including frame, stator yoke, stator pole, winding, air-gap, end-winding, end-cap air, rotor pole, rotor core and shaft. All details of the modelling and the required equations are given and therefore someone can use the model easily. The developed thermal model is applied to a typical two-layer 8/6 SRM and a prototyped three-layer 8/8 SRM and the simulation results are then compared with those derived from three-dimensional finite element (FE) method using ANSYS FE package and experimental results. These comparisons show well high computation speed and accuracy of the lumped thermal model developed for the multi-layer SRM.

[1]  Babak Fahimi,et al.  Thermal Modeling and Analysis of a Double-Stator Switched Reluctance Motor , 2015, IEEE Transactions on Energy Conversion.

[2]  Hao Chen,et al.  Design and multi‐objective optimisation of switched reluctance machine with iron loss , 2019, IET Electric Power Applications.

[3]  Koichiro Sawa,et al.  A temperature rise analysis of switched reluctance motor due to the core and copper loss by FEM , 2003 .

[4]  Eva Cosoroaba,et al.  Comprehensive Report on Design and Development of a 100-kW DSSRM , 2018, IEEE Transactions on Transportation Electrification.

[5]  Akira Chiba,et al.  Acoustic Noise and Vibration Reduction of SRM by Elimination of Third Harmonic Component in Sum of Radial Forces , 2015, IEEE Transactions on Energy Conversion.

[6]  Jian Li,et al.  Investigation into Reduction of Vibration and Acoustic Noise in Switched Reluctance Motors in Radial Force Excitation and Frame Transfer Function Aspects , 2009, IEEE Transactions on Magnetics.

[7]  Ali Emadi,et al.  An Improved Torque Sharing Function for Torque Ripple Reduction in Switched Reluctance Machines , 2019, IEEE Transactions on Power Electronics.

[8]  Jawad Faiz,et al.  Loss prediction in switched reluctance motors using finite element method , 2009 .

[9]  J. Faiz,et al.  Temperature Rise Analysis of Switched Reluctance Motors Due to Electromagnetic Losses , 2009, IEEE Transactions on Magnetics.

[10]  Ferhat Daldaban,et al.  Multi-layer switched reluctance motor to reduce torque ripple , 2008 .

[11]  Ebrahim Afjei,et al.  New Double-Layer-per-Phase Isolated Switched Reluctance Motor: Concept, Numerical Analysis, and Experimental Confirmation , 2012, IEEE Transactions on Industrial Electronics.

[12]  M. Ehsani,et al.  Advantages of switched reluctance motor applications to EV and HEV: design and control issues , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[13]  Jawad Faiz,et al.  Core loss model based on finite-element method for switched reluctance motors , 2010 .

[14]  P.O. Rasmussen,et al.  Structural stator spacers-a solution for noise reduction of switched reluctance motors , 2004, IEEE Transactions on Industry Applications.

[15]  Rebecca Todd,et al.  Behavioural modelling of a switched reluctance motor drive for aircraft power systems , 2014 .

[16]  Ali Emadi,et al.  Reducing torque ripple of switched reluctance machines by relocation of rotor moulding clinches , 2012 .

[17]  R. Arumugam,et al.  Analysis and characterization of switched reluctance motors: Part II. Flow, thermal, and vibration analyses , 2005, IEEE Transactions on Magnetics.

[18]  Francisco J. Márquez-Fernández,et al.  Experimental Validation of a Thermal Model for High-Speed Switched Reluctance Machines for Traction Applications , 2018, IEEE Transactions on Industry Applications.

[19]  Pere Andrada,et al.  Influence of Design Parameters in the Optimization of Linear Switched Reluctance Motor Under Thermal Constraints , 2018, IEEE Transactions on Industrial Electronics.

[20]  Ebrahim Afjei,et al.  Design, simulation and experimental results for a novel type of two-layer 6/4 three-phase switched reluctance motor/generator , 2013 .

[21]  Wenping Cao,et al.  Winding-centre-tapped switched reluctance motor drive for multi-source charging in electric vehicle applications , 2015 .

[22]  S. Morimoto,et al.  Influence of Various Non-Oriented Electrical Steels on Motor Efficiency and Iron Loss in Switched Reluctance Motor , 2013, IEEE Transactions on Magnetics.

[23]  Pragasen Pillay,et al.  THERMAL MODEL FOR A SWITCHED RELUCTANCE MOTOR OF TEFC DESIGN DURING STEADY AND TRANSIENT OPERATION , 1998 .

[24]  M. Gabsi,et al.  Comparative Studies Between Classical and Mutually Coupled Switched Reluctance Motors Using Thermal-Electromagnetic Analysis for Driving Cycles , 2011, IEEE Transactions on Magnetics.

[25]  Kemal Leblebicioglu,et al.  Optimum geometry for torque ripple minimization of switched reluctance motors , 2000 .

[26]  Jawad Faiz,et al.  Lumped thermal model for switched reluctance motor applied to mechanical design optimization , 2007, Math. Comput. Model..