Electrification of higher torque density applications in the transportation sector and robotics are primarily met with permanent magnet synchronous machines (PMSMs), attributing to their unique properties. However, wide operating temperatures, field weakening controls, low-quality magnets, lead uniform demagnetization rotor magnets. Demagnetization control reduce effective output as is proporti...

We propose a new optimization method based on a demagnetization procedure well known in magnetism. We show how this procedure can be applied as a general tool to search for optimal solutions in any system where the configuration space is endowed with a suitable "distance." We test the new algorithm on frustrated magnetic models and the traveling salesman problem. We find that the new method suc...

The developed subdomain model accounting for tooth-tips can accurately predict the open-circuit, armature reaction and on-load field distributions in surface-mounted permanent magnet machines. Based on this field model, their electromagnetic performance of the machine, such as the cogging torque, back-EMF and electromagnetic torque, and winding inductances are calculated. The model can also be ...

We study the charge and spin dependent scattering in a set of CoFeB thin films whose crystalline order is systematically enhanced controlled by annealing at increasingly higher temperatures. Terahertz conductivity measurements reveal that transport closely follows development phase, with increasing structural leading to conductivity. The terahertz-induced ultrafast demagnetization, driven spin-...