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A flux-switching permanent magnet (FSPM) machine using ferrite magnet is proposed to replace the permanent magnet synchronous motors (PMSMs) in elevator doors. In order to improve both mechanical robustness and manufacturability, bridges around permanent magnet (PM) slots have been adopted in the C-shaped core of an FSPM machine. The optimization of the C-shaped stator is conducted, and its prototype...
The aim of this paper is to evaluate alternatives to Surface-mounted Permanent Magnet (SPM) machines in low-speed high-torque applications, such as elevator systems, grindstones and positioning systems, where the electrical motor is directly connected to the load. In particular, the potentiality of PM-Assisted Reluctance (PMAREL) machines is deeply investigated. The capability of an SPM motor (adopting...
This paper deals with the analysis of average torque and torque ripple in synchronous reluctance machines assisted by Ferrite permanent magnets, for applications requiring high torque at low speed. The machines distinguish themselves by an anisotropic rotor and a high number of poles. As a peculiar feature, the analysed machines are characterized by fractional-slot non-overlapped coil windings. When...
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