کنفرانس بین المللی ماشین و محرکه های الکتریکی

صفحه اصلی / The 3rd International Conference on Electrical Machines and Drives

Axial Dual-Flux-Modulator Magnetic Gear Mitigating Yoke Flux Leakage

نویسندگان :

Aran Shoaei¹ Qingsong Wang²

1- Departement of Electrical Engineering, École de technologie supérieure (ÉTS) Montreal, Quebec, Canada 2- Departement of Electrical Engineering, École de technologie supérieure (ÉTS) Montreal, Quebec, Canada

کلمات کلیدی :

axial flux،dual-flux-modulator،Halbach،leakage flux،magnetic gear

چکیده :

In order to improve the torque capability of coaxial magnetic gears (CMGs), spoke type PM arrangement can be adopted in both high-speed and low-speed rotors. This configuration concentrates the magnetic flux within iron pole shoes, resulting in a more effective flux density distribution in the air-gap. Nonetheless, spoke-type structure is prone to a significant leakage flux, particularly at the outer boundary of the low-speed rotor. To address this issue, this paper presents a novel structure known as the axial flux dual-flux-modulator CMG (AF-DFM CMG) in which, an auxiliary slotted flux-modulator is incorporated to mitigate the leakage flux in the outer rotor. This not only reduces leakage flux but also introduces more harmonics in the torque transmission, revealing the nested magnetic gearing effect of the iron pole shoes. Additionally, the inner rotor adopts a Halbach PM arrangement to create a more sinusoidal air-gap flux density distribution and decrease the thickness of the back iron yoke. The performance of the proposed structure is theoretically described and then verified by 3D finite element analysis (3D-FEA). The results demonstrate the superiority of the AF-DFM CMG over conventional surface-mounted and spoke-type configurations, with respective improvements of 67% and 40% in torque capability. This highlights the remarkable potential of the new design.