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  1. A 3-D Analytic-Based Model of a Null-Flux Halbach Array Electrodynamic Suspension Device

    The purpose of this paper is to present the derivation of a 3-D analytical solution of a null-flux electrodynamic suspension device for a conductive plate. The device consists of a linear Halbach magnet array...

  2. A 3-D Analytical Model for a Double Halbach Linear Array Electrodynamic Suspension System

    By translationally moving a magnetic source above a conductive plate guideway both levitation and drag forces are created. Unfortunately, the electrodynamic drag force can be quite high [1]. Kratz studied a...

  3. A 3-D Analytical Model of a Halbach Axial Magnetic Coupling

    A 3-D analytical model is presented for a Halbach axial magnetic coupling. The field and torque are determined by first solving a 2-D field problem at the radial location in which the radial flux density is...

  4. Electrodynamic Wheel Magnetic Rolling Resistance

    In this paper the concept of magnetic rolling resistance (MRR) is introduced. The MRR is particularly useful when trying to characterize maglev devices that operate with a slip. Approaches to minimize the MRR...

  5. Designing a Continuously Variable Magnetic Gear

    This paper investigates the performance capabilities of a continuously variable magnetic gearbox that utilizes a flux focusing rotor structure. A fractional slot stator winding is designed to couple to the...

  6. Ideal Radial Permanent Magnet Coupling Torque Density Analysis

    This paper derives the closed form 3-D analytical torque equations for an ideal radial Halbach rotor magnetic coupling. The performance of the radial Halbach coupling is then compared with an ideal axial...

  7. Analysis of a Magnetically Geared Lead Screw

    Linear magnetic gearboxes (LMG) and magnetic lead screws (MLS) have been shown to be capable of operating at significantly higher volumetric force densities than traditional electromagnetic linear actuators...

  8. A Low Assembly Cost Coaxial Magnetic Gearbox

    This paper presents the design investigation and experimental testing of a flux-focusing magnetic gearbox with a three piece laminated rotor structure. Each rotor is made of a single lamination stack held...

  9. Site Selection by Migratory Shorebirds in Oregon Estuaries Over Broad and Fine Spatial Scales

    Many migratory shorebirds rely on estuaries as stop-over sites to refuel during migration, and the loss of stop-over sites is a primary threat to shorebird populations on the West Coast of the United States...

  10. The Biology of Eastern Kingbirds at Malheur National Wildlife Refuge: Survival, Reproduction, and Testosterone Secretion

    This dissertation presents the results of a study that I undertook to better understand the breeding biology of Eastern Kingbirds (hereafter, kingbirds) at Malheur National Wildlife Refuge in southeastern...

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