Optimal Power Utilization by Adjusting Torque Boost and Field Weakening Operation in Permanent Magnet Traction Motors

Variable speed traction systems require constant adaptation of torque and speed, and thus, it is desirable to reduce motor size and weight by approximating constant power curve as much as possible. The design strategies under which a permanent magnet motor can demonstrate significant torque over-boost and field weakening capabilities using single-gear transmission are investigated. This paper gives a good quantitative comparison of surface-mounted, internal, and hybrid rotor topologies, featuring permanent magnets by introducing a power utilization coefficient, which benchmarks the capability of a traction system to utilize its rated power over the whole speed range, while optimal transmission ratio is investigated for the three rotor topologies.

[1]  Chunhua Liu,et al.  Design of a Magnetic-Geared Outer-Rotor Permanent-Magnet Brushless Motor for Electric Vehicles , 2007, IEEE Transactions on Magnetics.

[2]  Ayman M. El-Refaie,et al.  Fractional-Slot Concentrated-Windings Synchronous Permanent Magnet Machines: Opportunities and Challenges , 2010, IEEE Transactions on Industrial Electronics.

[3]  S. C. Stoicovy.  Geared versus gearless adjustable-speed drive systems in the pulp and paper industry , 1988 .

[4]  Hyun-Kyo Jung,et al.  Efficiency optimization of interior permanent magnet synchronous motor using genetic algorithms , 1997 .

[5]  L.L. Wang,et al.  Development of a Magnetic-Geared Permanent-Magnet Brushless Motor , 2009, IEEE Transactions on Magnetics.

[6]  Longya Xu,et al.  Multioperational Modes and Control Strategies of Dual-Mechanical-Port Machine for Hybrid Electrical Vehicles , 2007, IEEE Transactions on Industry Applications.

[7]  Antonios G. Kladas,et al.  Permanent-Magnet Shape Optimization Effects on Synchronous Motor Performance , 2011, IEEE Transactions on Industrial Electronics.

[8]  M. Yamanaka,et al.  Modeling and Simulation of Shaft Drive CVT: Study on Characteristic of Ratio Change Mechanism , 2006, 2006 International Conference on Mechatronics and Automation.

[9]  T. Ohnishi,et al.  Optimal design of efficient IPM motor using finite element method , 2000 .

[10]  H Grotstollen.  Optimal Design of Motor and Gear for Drives With High Acceleration by Consideration of Torque–Speed and Torque–Acceleration Product , 2011, IEEE Transactions on Industry Applications.

[11]  Yee-Pien Yang,et al.  Optimal Design and Control of a Wheel Motor for Electric Passenger Cars , 2005, IEEE Transactions on Magnetics.

[12]  F. Crescimbini,et al.  Application of direct drive wheel motor for fuel cell electric and hybrid electric vehicle propulsion system , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[13]  Nesimi Ertugrul,et al.  Field-weakening performance of interior permanent-magnet motors , 2000 .

[14]  Antonios G. Kladas,et al.  Internal Permanent Magnet Motor Design for Electric Vehicle Drive , 2010, IEEE Transactions on Industrial Electronics.

[15]  Ezio Santini,et al.  Multi-stage axial-flux PM machine for wheel direct drive , 1995 .

[16]  Antonios G. Kladas,et al.  High performance traction motor design and construction for small passenger electric car , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[17]  T.A. Lipo,et al.  Design and parameter effect analysis of dual-rotor, radial-flux, toroidally wound, permanent-magnet machines , 2004, IEEE Transactions on Industry Applications.

[18]  S.M. Savaresi,et al.  Control system design on a power-split CVT for high-power agricultural tractors , 2004, IEEE/ASME Transactions on Mechatronics.