Title :
Nonlinear two-dimensional finite element modeling of permanent magnet eddy current couplings and brakes
Author :
Nehl, Thomas W. ; Lequesne, Bruno ; Gangla, Vineeta ; Gutkowski, Seth A. ; Robinson, Mark J. ; Sebastian, Tomy
Author_Institution :
Dept. of Electr. & Electron., Gen. Motors Res. & Dev. Center, Warren, MI, USA
fDate :
9/1/1994 12:00:00 AM
Abstract :
A two-dimensional finite element model is developed to model the electromagnetic behavior of permanent magnet type eddy current couplers under constant speed operation. The model accounts for the nonlinearity of the steel flux paths and is verified using test measurements from a prototype eddy current coupler. The proposed solution differs from conventional magnetostatic finite element models in that an unknown current-density distribution must be determined through an iterative process. The model is used to study the influence of certain design parameters on the torque-speed characteristics of such devices
Keywords :
current density; eddy current braking; finite element analysis; iterative methods; magnetic flux; permanent magnets; constant speed operation; eddy current brakes; eddy current couplers; electromagnetic behavior; iterative process; nonlinearity; permanent magnet type; steel flux paths; torque-speed characteristics; two-dimensional finite element model; unknown current-density distribution; Couplers; Current measurement; Eddy current testing; Eddy currents; Electromagnetic coupling; Electromagnetic measurements; Electromagnetic modeling; Finite element methods; Permanent magnets; Steel;
Journal_Title :
Magnetics, IEEE Transactions on
