Magnetic Field Solution in Doubly Slotted Airgap of Conventional and Alternate Field-Excited Switched-Flux Topologies

A general solution of the magnetic field in the airgap of conventional and alternate field-excited switched-flux (FE-SF) machines is proposed in this paper. The analytical model is based on the subdomain method. It involves the solution of governing field equations in a doubly slotted airgap using the variable separation method. The complete model is derived and described in a general manner so that it can be easily extended to unconventional FE-SF topologies. By means of example, analytical predictions of airgap field are extensively compared and validated using 2D FE results. FE simulations were performed on a 24-10 classical FE-SF structure and also on a novel 18-11 FE-SF machine with additional spacer teeth.

[1]  Z. Zhu,et al.  An Accurate Subdomain Model for Magnetic Field Computation in Slotted Surface-Mounted Permanent-Magnet Machines , 2010, IEEE Transactions on Magnetics.

[2]  C. Espanet,et al.  Analytical Solution of the Magnetic Field in Permanent-Magnet Motors Taking Into Account Slotting Effect: No-Load Vector Potential and Flux Density Calculation , 2009, IEEE Transactions on Magnetics.

[3]  J T Chen,et al.  A Novel E-Core Switched-Flux PM Brushless AC Machine , 2011, IEEE Transactions on Industry Applications.

[4]  Yifan Zhao,et al.  A novel doubly salient single phase permanent magnet generator , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[5]  Bernard Multon,et al.  Influence of magnetic losses on maximum power limits of synchronous permanent magnet drives in flux-weakening mode , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[6]  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.

[7]  E. A. Lomonova,et al.  Spatial Discretization Methods for Air Gap Permeance Calculations in Double Salient Traction Motors , 2012, IEEE Transactions on Industry Applications.

[8]  Zhiquan Deng,et al.  Comparison of Hybrid Excitation Topologies for Flux-Switching Machines , 2012, IEEE Transactions on Magnetics.

[9]  Z. Zhu,et al.  Instantaneous magnetic field distribution in permanent magnet brushless DC motors. IV. Magnetic field on load , 1993 .

[10]  T. Lubin,et al.  Exact Analytical Method for Magnetic Field Computation in the Air Gap of Cylindrical Electrical Machines Considering Slotting Effects , 2010, IEEE Transactions on Magnetics.

[11]  Gan Zhang,et al.  A Novel Hybrid Excitation Flux-Switching Motor for Hybrid Vehicles , 2009, IEEE Transactions on Magnetics.

[12]  C. Pollock,et al.  Low cost, high power density, flux switching machines and drives for power tools , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[13]  M. Gabsi,et al.  Analytical Armature Reaction Field Prediction in Field-Excited Flux-Switching Machines Using an Exact Relative Permeance Function , 2013, IEEE Transactions on Magnetics.

[14]  Johannes J. H. Paulides,et al.  Modeling of Flux Switching Permanent Magnet Machines With Fourier Analysis , 2010, IEEE Transactions on Magnetics.

[15]  E. Hoang,et al.  A new hybrid-excited flux-switching machine with excitation coils in stator slots , 2012, 2012 15th International Conference on Electrical Machines and Systems (ICEMS).

[16]  Z. Zhu,et al.  Advanced Flux-Switching Permanent Magnet Brushless Machines , 2010, IEEE Transactions on Magnetics.

[17]  S. E. Rauch,et al.  Design Principles of Flux-Switch Alternators [includes discussion] , 1955, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[18]  T. Lipo,et al.  Analytical calculation of magnetic field distribution in the slotted air gap of a surface permanent-magnet motor using complex relative air-gap permeance , 2006, IEEE Transactions on Magnetics.

[19]  E. Hoang,et al.  A new structure of a switching flux synchronous polyphased machine with hybrid excitation , 2007, 2007 European Conference on Power Electronics and Applications.

[20]  L Parsa,et al.  Multiobjective Design Optimization of Five-Phase Halbach Array Permanent-Magnet Machine , 2011, IEEE Transactions on Magnetics.

[21]  U. Kim,et al.  Magnetic field calculation in permanent magnet motors with rotor eccentricity: without slotting effect , 1998 .

[22]  D. K. Lieu,et al.  Magnetic field calculation in permanent magnet motors with rotor eccentricity: with slotting effect considered , 1998 .

[23]  G. Jewell,et al.  Cogging Torque in Flux-Switching Permanent Magnet Machines , 2009, IEEE Transactions on Magnetics.

[24]  Z.J. Liu,et al.  Analytical Solution of Air-Gap Field in Permanent-Magnet Motors Taking Into Account the Effect of Pole Transition Over Slots , 2007, IEEE Transactions on Magnetics.

[25]  Jian-Xin Shen,et al.  A New Method for Reduction of Detent Force in Permanent Magnet Flux-Switching Linear Motors , 2009, IEEE Transactions on Magnetics.

[26]  J. B. Wang,et al.  Review of variable-flux permanent magnet machines , 2011, 2011 International Conference on Electrical Machines and Systems.

[27]  L. Encica,et al.  Tooth contour method implementation for the flux-switching PM machines , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[28]  E. Hoang,et al.  Hybrid excitation synchronous permanent magnets synchronous machines optimally designed for hybrid and full electrical vehicle , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[29]  Z. Zhu,et al.  Hybrid-Excited Flux-Switching Permanent-Magnet Machines With Iron Flux Bridges , 2010, IEEE Transactions on Magnetics.

[30]  B. Mecrow,et al.  A wound-field three-phase flux-switching synchronous motor with all excitation sources on the stator , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[31]  Z. Zhu,et al.  Instantaneous magnetic field distribution in brushless permanent magnet DC motors. III. Effect of stator slotting , 1993 .

[32]  D. Howe,et al.  Analysis of electromagnetic performance of flux-switching permanent-magnet Machines by nonlinear adaptive lumped parameter magnetic circuit model , 2005, IEEE Transactions on Magnetics.

[33]  Z. Zhu,et al.  Low cost flux-switching brushless AC machines , 2010, 2010 IEEE Vehicle Power and Propulsion Conference.

[34]  Ming Cheng,et al.  Design and analysis of a novel stator-doubly-fed doubly salient motor for electric vehicles , 2005 .

[35]  Hamid Ben Ahmed,et al.  Switching flux permanent magnet polyphased synchronous machines , 1997 .

[36]  C. Pollock,et al.  A permanent magnet flux switching motor for low energy axial fans , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[37]  H. Tiegna,et al.  Analytical Modeling of the Open-Circuit Magnetic Field in Axial Flux Permanent-Magnet Machines With Semi-Closed Slots , 2012, IEEE Transactions on Magnetics.

[38]  Mohamed Gabsi,et al.  Design and comparison of different flux‐switch synchronous machines for an aircraft oil breather application , 2005 .

[39]  M. Gabsi,et al.  Two-Dimensional Analytical Airgap Field Model of an Inset Permanent Magnet Synchronous Machine, Taking Into Account the Slotting Effect , 2013, IEEE Transactions on Magnetics.

[40]  T. Lipo,et al.  Analytical Solution for Cogging Torque in Surface Permanent-Magnet Motors Using Conformal Mapping , 2008, IEEE Transactions on Magnetics.

[41]  D. Howe,et al.  Three-Dimensional Lumped-Parameter Magnetic Circuit Analysis of Single-Phase Flux-Switching Permanent-Magnet Motor , 2008, IEEE Transactions on Industry Applications.

[42]  M. Gabsi,et al.  Analytical Approach for Air-Gap Modeling of Field-Excited Flux-Switching Machine: No-Load Operation , 2012, IEEE Transactions on Magnetics.

[43]  N. Matsui,et al.  High Power Density Design of 6-Slot–8-Pole Hybrid Excitation Flux Switching Machine for Hybrid Electric Vehicles , 2011, IEEE Transactions on Magnetics.

[44]  D. Gerling,et al.  Stator Slotting Effect on the Magnetic Field Distribution of Salient Pole Synchronous Permanent-Magnet Machines , 2010, IEEE Transactions on Magnetics.

[45]  Jianning Dong,et al.  Analysis of the Oversaturated Effect in Hybrid Excited Flux-Switching Machines , 2011, IEEE Transactions on Magnetics.