Title :
Magnetic Design Aspects of the Trans-Rotary Magnetic Gear
Author :
Pakdelian, Siavash ; Frank, Nicolas W. ; Toliyat, Hamid A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
This paper studies several magnetic design aspects of the trans-rotary magnetic gear (TROMAG). The TROMAG is a magnetic device that converts linear motion to rotation, and vice versa, through magnetic field while doing a gearing action. This means that a high-force, low-speed translation can be converted to a high-speed low-torque rotation. Once coupled with a conventional rotary machine, the resultant system may be used as a compact electromechanical motion system for high-force linear-motion applications, such as wave energy conversion. The paper investigates the magnetic design of the TROMAG by means of either two-dimensional (2-D) or three-dimensional (3-D) finite element analysis (FEA), or an accurate analytical model. The impact of nonideal discretized helix and dimensions of magnets and air gap are investigated, as well as scaling rules of the TROMAG and the possibility of demagnetization. Experimental results obtained from a lab prototype are also presented to verify the concept and analysis.
Keywords :
demagnetisation; finite element analysis; gears; magnetic devices; permanent magnet machines; 2D finite element analysis; 3D finite element analysis; FEA; TROMAG; air gap; compact electromechanical motion system; demagnetization; gearing action; high-force linear-motion applications; high-force low-speed translation; high-speed low-torque rotation; magnetic design aspects; magnetic device; magnetic field; nonideal discretized helix; rotary machine; three-dimensional finite element analysis; trans-rotary magnetic gear; two-dimensional finite element analysis; wave energy conversion; Force; Gears; Magnetic cores; Magnetomechanical effects; Rotors; Saturation magnetization; Stress; Finite element analysis (FEA); lead screw; linear permanent-magnet (PM) machines; magnetic gear; trans-rotary magnetic gear (TROMAG);
Journal_Title :
Energy Conversion, IEEE Transactions on
DOI :
10.1109/TEC.2014.2361289