Richard D. Nathenson

  • Citations Per Year
Learn More
Efforts are underway to develop superconducting generators for commercial power operation. These machines typically will have large air gap armatures, departing from conventional generator experience. The mechanical design of such an armature to withstand operational loads is, therefore, a new area. This paper describes work that has been done to determine(More)
A new type of airgap armature with spiral pancake coils is being developed, particularly for applications in large superconducting generators. The airgap armature significantly departs, both in construction and in design, from the conventional generator. Major design considerations in supporting the axial and tangential forces of electromagnetic and thermal(More)
The airgap armature in toothless flux shield is emerging as a preferred stator configuration for superconducting generators being developed world-wide. The steady state vibrations and the natural frequencies of such a stator have been studied in this paper. A two-dimensional static analysis and a three-dimensional dynamic analysis using cyclic symmetry have(More)
In both the ferrous and nonferrous industries, controlling the flow of metal from one vessel to another is vital to the process, whether it is from a melting or holding furnace to multiple molds in a batch casting process or from a ladle to a tundish to a mold in a continuous caster. Conventional flow control devices include metering nozzles, stopper rods.(More)
The present work was done as a part of the 300 MVA superconducting generator development project jointly funded by the Electric Power Research Institute and the authors' company. The analytical developments necessary for a successful design included stress analyses due to electromagnetic and thermal loading as well as studying the dynamic behavior of the(More)
This paper presents the results for an axisymmetric finite element analysis of the stator armature and flux shield of a 300 MVA superconducting generator subject to manufacturing and operational thermal events. These machines typically will have large air gap armatures, departing from conventional generator experience. The mechanical design of such an(More)
  • 1