A Novel Proposal to Improve Reliability of Spoke-Type BLDC Motor Using Ferrite Permanent Magnet

This paper proposes a novel proposal to improve reliability of a spoke-type brushless direct current (BLDC) motor using ferrite permanent magnets (Fe-PMs) through a new design. First, the design process for a neodymium permanent magnet (Nd-PM) free spoke-type BLDC motor without assistant permanent magnets (PMs) is presented. The proposed motor is designed by taking into account the demagnetization phenomenon. Second, the effect of the armature reaction on the PMs is analyzed by using the finite element method (FEM) in order to evaluate the robustness of the proposed motor with Fe-PM. In addition, another proposal to avoid the demagnetization phenomenon is suggested. Finally, a prototype motor is manufactured based on the proposed motor. The output characteristics of prototype motor and the demagnetization phenomenon are verified through an experiment.

[1]  G. Stumberger,et al.  Novel Field-Weakening Control Scheme for Permanent-Magnet Synchronous Machines Based on Voltage Angle Control , 2012, IEEE Transactions on Industry Applications.

[2]  Akira Chiba,et al.  Development of a Rare-Earth-Free SR Motor With High Torque Density for Hybrid Vehicles , 2015, IEEE Transactions on Energy Conversion.

[3]  Nicola Bianchi,et al.  Performance comparison of fractional slot concentrated winding spoke type synchronous motors with different slot-pole combinations , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  Keiji Kondo,et al.  A New PM-Assisted Synchronous Reluctance Motor With Three-Dimensional Trench Air Gap , 2014, IEEE Transactions on Industry Applications.

[5]  O. A. Mohammed,et al.  Demagnetization Control for Reliable Flux Weakening Control in PM Synchronous Machine , 2012, IEEE Transactions on Energy Conversion.

[6]  Kyung-tae Kim,et al.  Optimization Methods of Torque Density for Developing the Neodymium Free SPOKE-Type BLDC Motor , 2013, IEEE Transactions on Magnetics.

[7]  K.R. Rajagopal,et al.  Effect of armature reaction on the performance of an axial-field permanent-magnet brushless DC motor using FE method , 2004, IEEE Transactions on Magnetics.

[8]  Jin Hur,et al.  Characteristic Analysis of Interior Permanent-Magnet Synchronous Motor in Electrohydraulic Power Steering Systems , 2008, IEEE Transactions on Industrial Electronics.

[9]  S. Ogasawara,et al.  Torque Density and Efficiency Improvements of a Switched Reluctance Motor Without Rare-Earth Material for Hybrid Vehicles , 2011, IEEE Transactions on Industry Applications.

[10]  Hyung-Woo Lee,et al.  The Internal Fault Analysis of Brushless DC Motors Based on the Winding Function Theory , 2009, IEEE Transactions on Magnetics.

[11]  Kyung-tae Kim,et al.  Design and Optimization of Neodymium-Free SPOKE-Type Motor With Segmented Wing-Shaped PM , 2014, IEEE Transactions on Magnetics.

[12]  Babak Nahid-Mobarakeh,et al.  Optimal Design of Permanent Magnet Motors to Improve Field-Weakening Performances in Variable Speed Drives , 2012, IEEE Transactions on Industrial Electronics.

[13]  N. Ertugrul,et al.  Maximum-Torque-per-Ampere Control of Phase Advance Modulation of an SPM Wind Generator , 2012, IEEE Transactions on Industry Applications.

[14]  N. Bianchi,et al.  Performance Comparison Between Switching-Flux and IPM Machines With Rare-Earth and Ferrite PMs , 2014, IEEE Transactions on Industry Applications.

[15]  Shigeo Morimoto,et al.  Experimental Evaluation of a Rare-Earth-Free PMASynRM With Ferrite Magnets for Automotive Applications , 2014, IEEE Transactions on Industrial Electronics.

[16]  Massimo Barcaro,et al.  Interior PM Machines Using Ferrite to Replace Rare-Earth Surface PM Machines , 2014, IEEE Transactions on Industry Applications.

[17]  N. Bianchi,et al.  Rotor Flux-Barrier Design for Torque Ripple Reduction in Synchronous Reluctance and PM-Assisted Synchronous Reluctance Motors , 2009, IEEE Transactions on Industry Applications.

[18]  Massimo Barcaro,et al.  Permanent-Magnet Optimization in Permanent-Magnet-Assisted Synchronous Reluctance Motor for a Wide Constant-Power Speed Range , 2012, IEEE Transactions on Industrial Electronics.

[19]  Seung-Ki Sul,et al.  Voltage control strategy for maximum torque operation of an induction machine in the field-weakening region , 1997, IEEE Trans. Ind. Electron..