Abstract
In this paper, an interior permanent magnet (IPM) synchronous machine with multiflux barriers is proposed to meet the wide speed regulation application requirements of electric vehicles. Based on the flux barrier characteristic, an electromagnetic–mechanical coupling optimization strategy is employed for the machine design. In order to facilitate the optimization design, the rotor barriers are divided into two optimization zones, the maximum stress zone and the maximum deformation zone. The electromagnetic–mechanical coupling optimization strategy is divided into two stages accordingly. In the first stage, the machine is regarded as a synchronous reluctance machine by ignoring permanent magnets, where the dimensions of the arc-shaped barriers are optimized to achieve a large reluctance torque and small stress. In the second stage, the dimensions of the arc-shaped PMs and the elliptical barrier are optimized with three objectives of minimum torque ripple, minimum flux linkage, and minimum deformation. After machine optimization, the comparison investigations are carried out on the basis of finite-element analysis by considering both the electromagnetic performances and mechanical performances.
Highlights
In recent years, with the rise of electric vehicles, considerable attention has been focused on interior permanent magnet (IPM) synchronous machines’ design and optimization [1,2]
It is worth noting that the situation may become more severe when it comes to a machine with multiflux barriers in its rotor
Medium-to-high speed, which is more advantageous for electric vehicle (EV) acceleration in high-speed operation
Summary
With the rise of electric vehicles, considerable attention has been focused on interior permanent magnet (IPM) synchronous machines’ design and optimization [1,2]. A higher saliency ratio caused by the several flux barriers allows a lower level of PM flux linkage As a result, it is easier for this type of machine to offset the magnetic forces of the d-axis. It is easier for this type of machine to offset the magnetic forces of the d-axis Another advantage of the rotor flux barriers is the great contribution of reluctance torque to total output torque. Another kind of multiflux-barrier machine with the characteristic of a flux-intensifying effect is proposed and has attracted much attention [13,14,15]. The performances of the machine before and after optimization are discussed at the last part of the paper
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
