Characteristic Analysis of a New Structure Eccentric Harmonic Magnetic Gear
Libing Jing,
Youzhong Wang,
Dawei Li,
Ronghai Qu
Affiliations
Libing Jing
College of Electrical Engineering and New Energy, Hubei Provincial Engineering Technology Research Center for Microgrid, China Three Gorges University, Yichang 443002, China
Youzhong Wang
College of Electrical Engineering and New Energy, Hubei Provincial Engineering Technology Research Center for Microgrid, China Three Gorges University, Yichang 443002, China
Dawei Li
Department of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Ronghai Qu
Department of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
An eccentric harmonic magnetic gear (EHMG) is better suited for situations requiring larger transmission ratios than magnetic-field-modulated magnetic gears. In the meantime, to increase the torque density even further, a new structure for EHMGs is presented in this paper. The stator’s permanent magnets (PMs) are irregularly distributed, while the rotor’s PMs are applied to a fan-shaped structure. Moreover, a Halbach array is adopted in both the rotor and the stator. A two-dimensional finite element (FE) model of the proposed EHMG is developed, and the flux density distribution and torque of the EHMG are calculated and verified via FE analysis. When compared to a conventional EHMG, the presented model’s torque increases from 38.04 Nm to 50.41 Nm. In addition, for the sake of avoiding the oscillation and noise caused by resonance, a modal analysis of the proposed model is conducted and the consequences show that it has better antivibration properties. Finally, a prototype is made, a test bench is established, and the correctness and effectiveness of the proposed model are verified.
