A Novel 24-Slots/10-Poles Winding Topology for Electric Machines

The fractional slots tooth concentrated windings are characterized with high space MMF harmonics which results to undesirable effects on electric machine, such as localised core saturation, eddy current loss in the rotor and noise and vibration. A new and high efficiency method is presented in this paper to reduce simultaneously the sub- and high MMF harmonics of these winding types. The method is based on doubling the number of stator slots, using two identical winding systems connected in series and shifted to each other for a specific angle, using stator core with different tooth width and using different turns per coil for the neighbouring phase coils. With the proposed technique the unwanted sub- and high winding MMF harmonics can be reduced or completely canceled.

[1]  Dieter Gerling,et al.  Magnetic radial force density of the PM machine with 12-teeth/10-poles winding topology , 2009, 2009 IEEE International Electric Machines and Drives Conference.

[2]  Dieter Gerling,et al.  Electric Machine Design Tailored for Powertrain Optimization , 2010 .

[3]  D. Howe,et al.  Vibration Characteristics of Modular Permanent Magnet Brushless AC Machines , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[4]  D. Gerling.  Analysis of the magnetomotive force of a three-phase winding with concentrated coils and different symmetry features , 2008, 2008 International Conference on Electrical Machines and Systems.

[5]  Dieter Gerling,et al.  Electric Drive Model for the Simulation of the Electric Powertrain in a Battery Electric Vehicle , 2010 .

[6]  Fernando J. T. E. Ferreira,et al.  Three phase tooth-concentrated multiple-layer fractional windings with low space harmonic content , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[7]  Геннадий Фёдорович Афанасьев,et al.  The electric machine , 2013 .

[8]  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..

[9]  H. Polinder,et al.  Eddy-Current Losses in the Solid Back-Iron of PM Machines for different Concentrated Fractional Pitch Windings , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[10]  M. Nakano,et al.  A study on eddy-current losses in rotors of surface permanent magnet synchronous machines , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[11]  Z.Q. Zhu,et al.  Comparison of PM brushless motors, having either all teeth or alternate teeth wound , 2006, IEEE Transactions on Energy Conversion.

[12]  G.W. Jewell,et al.  Analytical modelling and finite element computation of radial vibration force in fractional-slot permanent magnet brushless machines , 2009, 2009 IEEE International Electric Machines and Drives Conference.

[13]  Yoshihito Asao,et al.  dynamo-electric machine for a motor , 2006 .

[14]  Dieter Gerling,et al.  Cost-effective electric traction drive with high efficiency at low-load operation , 2010, 2010 Emobility - Electrical Power Train.