Two-phase transverse flux machine with disc rotor for high torque low speed application

Abstract

This paper presents a special two-phase transverse flux machine with disc rotor. Because of the noncomplex construction and by using simple 2D flux path and 3D printing methods the manufacturing costs are hold low. A design criterion is proposed for maximizing the torque density in the low speed range. To prove the concept and analyse the potential of this construction a first direct driven prototype was built. The experimental results confirm the viability of this proposal and provide the required information for further enhancements.

A Review of Transverse Flux Machines Topologies and Design

“…Tidal power (G) [80] and hydrokinetic power (G) [81]. A 10 kW, 150 rpm TF generator for tidal power has been proposed in [80]: due to the variable nature of tidal streams, the tidal turbine should operate over a wide range of frequencies.…”

“…A 10 kW, 150 rpm TF generator for tidal power has been proposed in [80]: due to the variable nature of tidal streams, the tidal turbine should operate over a wide range of frequencies. In [81], a 100 W, 100 rpm, two-phase TF generator is designed to gain energy from river streams as off-grid generation.…”

“…Surface-mounted magnets are usually glued on the external or internal edge of the rotor-depending on whether the rotor is internal or external, respectively-but they can be also be glued to the stator cores [61,76,[107][108][109], inserted in a disk-rotor [81,110,111] or embedded in the rotor teeth [112,113].…”

“…Disc-shaped rotor is a typical feature of axial-gap machines [15,17,[59][60][61]63,66,68,69,72,76,81,87,91,110,114,115]. A claw-pole TFM with a discoid rotor produces more torque than other machine with a similar volume and cylindrical rotor [87].…”

Towards Fully Additively-Manufactured Permanent Magnet Synchronous Machines: Opportunities and Challenges

“…In [4], ferromagnetic flux-modulation rings with cavities are built by 3D printing (SLM)for reducing core losses. In [5] 3D-printed (FFF /FAM)plastic stator cases that are used to hold stator U-cores of a 2-phase transverse flux machine were reported.…”