A novel stator-consequent-pole memory machine

This paper proposes a novel stator-consequent-pole memory machine (SCPMM), in which the AlNiCo permanent magnets (PMs) with low-coercive-force (LCF) are alternately placed between the adjacent stator teeth. This new machine has the merits of simplified online PM magnetization, robust rotor and easy thermal management. Meanwhile, the energy-efficient flux regulation can be achieved since the LCF magnets can be repetitively magnetized or demagnetized with negligible excitation loss. The parallel magnetic circuit topology between PM and armature reaction fields permits the LCF PMs to well resist the irreversible demagnetization risk. In addition, the SCPMM benefits from the ease of manufacture since the stator and rotor assemblies are similar to the switched reluctance machines. Afterwards, the machine configuration and operating principle are introduced, respectively. The available slot/pole combinations are analyzed. The electromagnetic performances of the SCPMMs having various slot/pole combinations are investigated and compared. A prototype is manufactured and tested to experimentally validate the finite-element (FE) analysis.

[1]  Z. Q. Zhu,et al.  A Wound Field Switched Flux Machine With Field and Armature Windings Separately Wound in Double Stators , 2015, IEEE Transactions on Energy Conversion.

[2]  Kazuaki Yuki,et al.  Principle of the variable-magnetic-force memory motor , 2009, 2009 International Conference on Electrical Machines and Systems.

[3]  Yunkai Huang,et al.  A Variable-Flux Hybrid-PM Switched-Flux Memory Machine for EV/HEV Applications , 2016, IEEE Transactions on Industry Applications.

[4]  Z. Zhu,et al.  Winding Configurations and Optimal Stator and Rotor Pole Combination of Flux-Switching PM Brushless AC Machines , 2010, IEEE Transactions on Energy Conversion.

[5]  Robert D. Lorenz,et al.  Design and evaluation of a variable-flux flux-intensifying interior permanent magnet machine , 2012, ECCE 2012.

[6]  H. Yang,et al.  Comparative study of novel variable-flux memory machines having stator permanent magnet topologies , 2015, 2015 IEEE Magnetics Conference (INTERMAG).

[7]  Ronghai Qu,et al.  Synthesis of Flux Switching Permanent Magnet Machines , 2016, IEEE Transactions on Energy Conversion.

[8]  Chuang Yu,et al.  Design, Analysis, and Control of DC-Excited Memory Motors , 2011, IEEE Transactions on Energy Conversion.

[9]  Zi-Qiang Zhu,et al.  Electrical Machines and Drives for Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[10]  Di Wu,et al.  Switched flux hybrid magnet memory machine , 2015 .

[11]  Hamid A. Toliyat,et al.  Propulsion system design of electric and hybrid vehicles , 1997, IEEE Trans. Ind. Electron..

[12]  D. Howe,et al.  Influence of design parameters on cogging torque in permanent magnet machines , 1997, 1997 IEEE International Electric Machines and Drives Conference Record.

[13]  T.J.E. Miller,et al.  Field-weakening performance of brushless synchronous AC motor drives , 1994 .

[14]  V. Ostovic,et al.  Memory motors , 2003 .

[15]  D. Howe,et al.  Influence of Skew and Cross-Coupling on Flux-Weakening Performance of Permanent-Magnet Brushless AC Machines , 2009, IEEE Transactions on Magnetics.

[16]  Shuhua Fang,et al.  Investigation of design methodology for non-rare-earth variable-flux switched-flux memory machines , 2016 .

[17]  Z. Zhu,et al.  Analysis of Air-Gap Field Modulation and Magnetic Gearing Effects in Switched Flux Permanent Magnet Machines , 2015, IEEE Transactions on Magnetics.

[18]  Z. Zhu,et al.  Average Torque Separation in Permanent Magnet Synchronous Machines Using Frozen Permeability , 2013, IEEE Transactions on Magnetics.