An investigation of slot-pole combinations for interior permanent magnet synchronous machines with different magnet topologies

In this paper three different magnet configurations, e.g. single V-shape, double V-shape and delta-shape are investigated in the integer-slot 48/8 and fractional slot 36/8 interior permanent magnet synchronous machines (IPMSM). An optimization procedure for maximizing torque per ampere is used to compare these six motor models under the same output torque levels. The torque qualities at both low- and high-speed points for these six motor models are studied first. Fast Fourier Transform (FFT) analysis is also performed on the torque waveforms. Harmonics of magnetomotive force of the rotors and stators are analyzed. Radial force waveforms are also compared for these motor models. 36/8 winding configuration improves torque quality at both low- and high-speed points.

[1]  Jangho Seo.  Investigation on Performance Characteristics of IPM for Electric Vehicles Considering Driving Conditions and Pole-Slot Combinations , 2013 .

[2]  T.M. Jahns,et al.  Torque Ripple Reduction in Interior Permanent Magnet Synchronous Machines Using the Principle of Mutual Harmonics Exclusion , 2007, 2007 IEEE Industry Applications Annual Meeting.

[3]  Ali Emadi,et al.  Rotor skew pattern design and optimisation for cogging torque reduction , 2016 .

[4]  C. Sadarangani,et al.  Winding factors and Joule losses of permanent magnet machines with concentrated windings , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[5]  G. Ombach,et al.  Synthesis of High Performance Fractional-Slot Permanent-Magnet Machines With Coil-Pitch of Two Slot-Pitches , 2014, IEEE Transactions on Energy Conversion.

[6]  D. Gerling,et al.  Reduction of Low Space Harmonics for the Fractional Slot Concentrated Windings Using a Novel Stator Design , 2014, IEEE Transactions on Magnetics.

[7]  Jin Wang,et al.  Harmonic winding factors and MMF analysis for five-phase fractional-slot concentrated winding PMSM , 2013, 2013 International Conference on Electrical Machines and Systems (ICEMS).

[8]  Jiabin Wang,et al.  Rotor eddy-current loss in permanent magnet brushless machines , 2004, IEEE transactions on magnetics.

[9]  J. A. Guemes,et al.  Comparative study of PMSM with integer-slot and fractional-slot windings , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[10]  C. Espanet,et al.  Performances comparison of PM machines with different rotor topologies and similar slot and pole numbers , 2012, International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion.

[11]  R. H. Staunton.  PM Motor Parametric Design Analyses for a Hybrid Electric Vehicle Traction Drive Application , 2004 .

[12]  Ali Emadi,et al.  Advanced electric drive vehicles , 2014 .

[13]  Thomas M. Jahns,et al.  Design Tradeoffs Between Stator Core Loss and Torque Ripple in IPM Machines , 2010 .

[14]  Shumei Cui,et al.  A comparative study of the interior permanent magnet electrical machine’s rotor configurations for a single shaft hybrid electric bus , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[15]  Berker Bilgin,et al.  Fundamentals of Electric Machines , 2014 .

[16]  G Pellegrino,et al.  Core Losses and Torque Ripple in IPM Machines: Dedicated Modeling and Design Tradeoff , 2010, IEEE Transactions on Industry Applications.

[17]  Jiabin Wang,et al.  Radial force density and vibration characteristics of modular permanent magnet brushless ac machine , 2006 .

[18]  Florence Meier.  Permanent-Magnet Synchronous Machines with Non-Overlapping Concentrated Windings for Low-Speed Direct-Drive Applications , 2008 .

[20]  Ali Emadi,et al.  Design and Comparison of Interior Permanent Magnet Motor Topologies for Traction Applications , 2017, IEEE Transactions on Transportation Electrification.