Analysis, design and experimental verification of a coaxial magnetic gear using stationary permanent-magnet ring

作者：Li, Xianglin; Cheng, Ming^*; Wang, Yubin

来源：IET Electric Power Applications, 2018, 12(2): 231-238.

DOI：10.1049/iet-epa.2017.0382

• gears
• permanent magnets
• rotors
• finite element analysis
• static characteristics
• parametric analysis
• two-dimensional finite element method
• torque ripples
• magnetic clearance
• mechanical reliability
• salient-pole-iron on
• speed-change transmission
• coaxial magnetic gear using stationary permanent-magnet ring

This study presents the analysis and experimental verification of a coaxial magnetic gear (CMG) for speed-change transmission. The key design of this CMG is to adopt a stationary permanent-magnet (PM) ring between the inner and outer rotors, aiming at removing the PMs and only retaining the salient-pole-iron on the outer rotor to improve its mechanical reliability. Meanwhile, due to a large equivalent magnetic clearance promoting low torque ripples, the proposed CMG can offer the advantages of achieving a consistent speed ratio and stable transmission within the entire pull-out torque range. By using the two-dimensional finite element method, the detailed parametric analysis and static characteristics of the proposed CMG are performed to set up its design criteria. Moreover, a quantitative comparison with a conventional CMG is conducted, and a prototype is also fabricated for experimentation to verify the validity of the proposed CMG.

• 出版日期2018-2
• 单位东南大学; 中国石油大学（北京）