A C-core linear flux-switching permanent magnet machine with positive additional teeth

The flux-switching permanent magnet (FSPM) machine is widely investigated due to the advantages such as ease of the PM heat management, simple and robust structure of the rotor, high power density and torque density, sinusoidal back electromotive force (EMF) and fault-tolerance capability. The purpose of this paper is to propose a C-core linear FSPM machine for ropeless elevator, in which two positive additional teeth are employed at the each end of the primary side to reduce the asymmetry caused by the end effect. Firstly, the structure of the proposed machine is presented. Then the performances of the proposed machine are analyzed and compared with the counterpart without additional teeth based on the finite element analysis (FEA). The results verify the feasibility of the positive additional teeth.