High-Performance Ferrite Permanent Magnet Brushless Machines

Abstract

the performance of a brushless permanent magnet machine topology equipped with axially and circumferentially magnetised ferrite permanent magnets is presented. Simulation studies show that for smaller ratios of axial length to active length, airgap flux densities in excess of 1T can be achieved, resulting in significant improvements, in torque production and efficiency. A prototype machine is manufactured and test results confirm the predictions of the EMF and static torque.

Study the dynamic performance of PM machines for different rotor topologies

“…However, the main disadvantage of IPM machines is the leakage flux specifically around the bottom of PMs near the shaft. Therefore, a non-magnetic bush is fixed over the shaft to reduce the value of the leakage flux [40].…”

Design, Analysis and Experimental Evaluation of a Novel High-Speed High-Power Ferrite IPM Machine for Traction Applications

“…For airgap flux density improvement, a novel ferrite IPM machine concept employing a unique configuration of circumferential and axial ferrite PM with an achievable airgap flux density higher than 1T was proposed in [19] and experimentally validated in [20]. To maximize the airgap flux density, the ratio of the axial length to the rotor diameter should be minimized, Fig.…”

Healthy and Open Phase PMaSynRM Model Based on Virtual Reluctance Concept

“…This is achieved by the replacement of the scarce rare earth magnets by widely available magnets based on the ferrite composites. The PMaSynRM reaches a wide speed range and high performance close to IPMSM and due to its resource footprint, it becomes competitive in many applications [8], [9].…”