Design and analysis of semi-closed stator core transverse flux permanent magnet generator

Abstract

Purpose The purpose of this paper is to modernize the generator system of wind turbine concept that not only improves the efficiency and power density but also reduces the system cost making design simpler and less expensive, especially in large-scale production. Design/methodology/approach This paper presents a new permanent magnet transverse flux generator (PMTFG) for wind energy production. The key feature of its composition is the double armature coil in a semi-closed stator core. The main structural difference of the presented design is the use of double coil in the same space of semi-closed stator core and reduced number of stator pole pairs and rotor magnets from 12/24 to 10/20. 3D simulations are performed using finite element analysis (FEA) to measure induced voltage and magnetic field distribution at no load. The FEA is performed to quantify the change in flux linkage, induced voltage and output power as a function of different speeds and load current. Findings Results show that PMTFG with double coil configuration has improved electromagnetic performance in terms of flux linkage, induced voltage, output power and efficiency. The power density of 10/20 PMTFG with the double coil is 0.0524 KW/Kg, about an 18% increase compared to the conventional design. Research limitations/implications The proposed PMTFG is highly recommended for direct drive applications such as wind power. Originality/value Four models are simulated by FEA with single and double coil configuration, and load analysis is performed on all simulated models. Finally, results are compared with conventional PMTFG.

Design and FEM analysis of high‐power density C‐core permanent magnet transverse flux generator with reduced PM volume

“…Given the manufacturing problems in PMTFM, [21] developed a PMTFG with fewer PMs on the rotor as provided in [22] and depicted in Figure 1. The study in [21] is further extended here, and the number of rotor PMs and stator cores are further reduced to 16 and 8, respectively, lowering the machine's overall cost. To validate the proposed 8/16 PMTFG, a prototype is built here.…”