Performance Analysis of Semi-Closed C-Core Permanent Magnet Transverse Flux Generator

Abstract

A new permanent magnet transverse flux generator (PMTFG) is proposed and analyzed in this paper. The proposed topology consists of 8 semi-closed stator cores having pole shoe to enhance flux linkage. Using viable space in stator cores, the double coil is used in armature winding to enhance back-emf and make it fault-tolerant. The rotor consists of only permanent magnets (PMs), 16 in number, placed in an aluminum housing. Production complexity and rotor mass are reduced, resulting in a greater active power density. A 3D finite-element model (FEM) is created to validate the design's feasibility and evaluate its electromagnetic performance. The no-load flux linkage, cogging torque, and back-emf are computed using 3D FEM. Meanwhile, output current, output power, losses, efficiency, and power density at various loads are investigated for load analysis. The FEM analysis indicates that by using this topology, 1.5 times better power density can be achieved by reducing stator cores and rotor magnets by 33% as compared to conventional design in literature. The performance results obtained from experimental results validate the FEM analysis previews well.