Investigation of the Characteristics of the Electrodynamic Wheel Suspension Device With Two-DOF Motion

A three-dimensional (3-D) derivation of an analytical model for an electrodynamic wheel suspension (EDWS) device is proposed in this article. The equations for source field generated by a Halbach wheel are derived by the superposition principle of magnetic charge sheets. The eddy current field distribution within the semicircular pipe track is modeled using the second-order vector potential (SOVP) theory. The analytical models describing fields and forces are validated by both finite element simulations and experimental results. In addition, the characteristics of the EDWS device with two-degree-of-freedom (DOF) motions are studied based on the proposed equations.