RESEARCH INVESTIGATION OF MAGNETIC AND ELECTRIC FORCES FOR ROTATING SHAFT SUSPENSION.

Abstract

Described are experimental efforts to achieve noncontacting confinement of rotating electrical machinery having radial air gaps. The approaches investigated included magnetostatic means, resonant electric and magnetic bearings, and electromagnets in high performance control systems. Both linear and nonlinear (dual-mode) controls were developed for nonminimum phase systems. Limitations and possible applications are outlined for the various bearings tested. Only one system achieved the goal of support of a 1 Hp. motor furnished by contractor. This system used servoed bipolar electromagnets and non-retentive rotors. It served as the basis for a conservative design for support of the SNAP II Combined Rotating Unit. Projected stiffness at 0.707 damping is 250,000 lbs/in. resulting in a whirl amplitude of 25 microinches and a total power expenditure of 675 watts. The special attributes of the magnetic thrust bearing are emphasized. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1965
Accession Number
AD0458034

Entities

Organizations

  • University of Virginia

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Gaps
  • Amplitude
  • Bearings
  • Contractors
  • Control Systems
  • Dual Mode
  • Electromagnets
  • Maglev
  • Magnetic Bearings
  • Stiffness
  • Thrust Bearings

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).