Performance of Halbach Cycloidal Magnetic Gears with Respect to Torque Density and Gear Ratio
- Resource Type
- Conference
- Authors
- Huang, Hailin; Qu, Ronghai; Bird, Jonathan
- Source
- 2019 IEEE International Electric Machines & Drives Conference (IEMDC) Electric Machines & Drives Conference (IEMDC), 2019 IEEE International. :1977-1984 May, 2019
- Subject
- Power, Energy and Industry Applications
Rotors
Torque
Magnetic gears
Orbits
Magnetic flux
Iron
Topic-Magnetic gear
Halbach rotor
finite element analysis
torque density
- Language
This paper investigates the volumetric torque density performance of a radial and an axial cycloidal magnetic gear when using a Halbach magnet rotor typology. The analysis is conducted in order to determine the geometric design rules that yield the highest volumetric torque density. The performance is studied with respect to pole-pair number, orbit length as well as the permanent magnet thickness and pole-pitch. Several parameter design guidelines are presented and shown to be valid regardless of gear ratio. Using 3-D finite element analysis a calculated torque density of up to 463 N.m/L and 475 N.m/L is shown to be achievable for the radial and axial cycloidal magnetic gear typology. The problems with unbalanced radial forces within both the radial and axial cycloidal magnetic gear is highlighted.