Design Optimization of a Surface-Mounted Permanent-Magnet Motor With Concentrated Windings for Electric Vehicle Applications
- 16 November 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Vehicular Technology
- Vol. 62 (3), 1053-1064
- https://doi.org/10.1109/tvt.2012.2227867
Abstract
This paper describes design techniques for electric vehicle (EV) traction machines to achieve high efficiency against a defined driving cycle such as the New European Drive Cycle (NEDC) while satisfying the required torque-speed operating range. A fractional-slot concentrated-winding (FSCW) surface-mounted permanent-magnet (SPM) machine has been identified as a suitable candidate for EV applications due to its high power/torque density, high efficiency, and good flux-weakening capability compared with other competing machine topologies. Based on the vehicle characteristics and the reference driving cycle, the motor specifications are established, and the design constraints for the SPM machine to satisfy the peak torque and flux-weakening capabilities are derived. Furthermore, the influence of the key parameters, such as slot-pole number combination, machine inductance, axial length, and number of turns, on the machine copper and iron losses over the NEDC is evaluated. Optimizations were carried for these parameters to minimize the total energy losses over the driving cycle. It has been shown that conventional design methodologies that aim to maximize efficiency in the region close to the rated operating condition may lead to less optimal designs and higher energy losses over the NEDC. A prototype motor for a front- and rear-wheel-driven EV has been designed, manufactured, and tested. The experimental results validate the proposed design methodology.Keywords
This publication has 25 references indexed in Scilit:
- Torque Distribution Strategy for a Front- and Rear-Wheel-Driven Electric VehicleIEEE Transactions on Vehicular Technology, 2012
- Electrical Motor Drivelines in Commercial All-Electric Vehicles: A ReviewIEEE Transactions on Vehicular Technology, 2011
- Comparison between SPM and IPM motor drives for EV applicationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- Design and performance of 6-slot 5-pole PMFSM with hybrid excitation for hybrid electric vehicle applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- Rotor Eddy-Current Loss in Permanent-Magnet Brushless AC MachinesIEEE Transactions on Magnetics, 2010
- Hybrid Excitation Synchronous Machines: Energy-Efficient Solution for Vehicles PropulsionIEEE Transactions on Vehicular Technology, 2008
- Effect of Axial Segmentation of Permanent Magnets on Rotor Loss in Modular Permanent-Magnet Brushless MachinesIEEE Transactions on Industry Applications, 2007
- Three-Phase Modular Permanent Magnet Brushless Machine for Torque Boosting on a Downsized ICE VehicleIEEE Transactions on Vehicular Technology, 2005
- Optimal Flux Weakening in Surface PM Machines Using Fractional-Slot Concentrated WindingsIEEE Transactions on Industry Applications, 2005
- Synthesis of high performance PM motors with concentrated windingsIEEE Transactions on Energy Conversion, 2002