Power Characteristics Analysis of a Novel Double-Stator Magnetic Geared Permanent Magnet Generator

Abstract

This paper presents the design, fabrication and experimental power analysis of a novel double-stator magnetic geared permanent magnet (DSMGPM) machine which comprises of a doublestator permanent-magnet (PM) machine integrated a with triple rotor magnetic gear. The proposed machine can upscale the low-speed rotating magnetic field of the prime PMs on the prime rotor by using the modulation effect produced from the pole-pieces to high-speed rotating magnetic field from the field PMs. The low-speed prime rotor can also increase the speed of the field PM rotor and excite the coil windings to induce an electromotive force (EMF) resulting in electrical power. Thus, the machine is proposed for power generation in low-speed renewable energy applications such as wind turbines and tidal power generators. The proposed machine topology is presented and discussed while the performance power characteristics are evaluated experimentally. A prototype is fabricated and the measured results are in good agreement with the calculated results, therefore validating the proposed magnetic geared machine design.

Simplified Design of Magnetic Gear by Considering the Maximum Transmission Torque Line

“…Model 2 and Model 4 show almost the same maximum flux density, which is around 1.6 Tesla, while Model 1 shows a lower maximum flux density, which is around 1.4 Tesla, and the lowest flux density is achieved by Model 5, at around 1.35 Tesla. In a paper that studied a novel magnetic geared generator, the flux density also shows around 1.8 Tesla maximum density is achieved [13]. Thus, it is considered that all the models have a good magnetic flux distribution, since the appearance of the red region on the flux densities are not significant.…”

“…Besides using the MG for speed conversion of a motor, some researchers developed a new structure of MG with dual-iron ring which is integrated with a generator. The integration between the MG and generator produced higher power density for low-speed applications, such as wind turbine [13][14][15][16].…”