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A Double Sand Clock Topology for Superconducting Motors

IP.com Disclosure Number: IPCOM000130701D
Publication Date: 2005-Nov-01
Document File: 3 page(s) / 133K

Publishing Venue

The IP.com Prior Art Database

Abstract

The general purpose of this invention is to provide a stiff suspension system for rotating machinery and use material optimally.

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A Double Sand Clock Topology for Superconducting Motors

The general purpose of this invention is to provide a stiff suspension system for rotating machinery and use material optimally.

Topology Philosophy: Optimal Material Use

* Load transfer through membrane stress than bending
* Shells are the optimal way of carrying loads
* Full thickness of the shell is used to carry the leads through membrane stress
* Plates are the least efficient way of carrying loads
* Plates carry the loads through bending stress
* Only outer surfaces of the plate are used to their full capacity
* Percent use of full potential of the material in plates varies linearly from 100% at its outer surfaces to 0% at its middle surface
* Transfer torque through torsional shear stress in a shell than through shear stress in a disk
* The torsional shear stress in a shell is proportional 1/R4

* The shear stress in a disk is proportional 1/R
* Shells are the most efficient way of carrying torque
* Disk are the least efficient way of carrying torque

Topology Philosophy: Optimal Method of Load Transfer

* Decouple cold mass from the EM shield
* Transfer the load through C.G. of the cold mass
* This prevents generating moment due to shock loads
* Control deformation of both ends of the pole support structure
* This would increase natural frequency and eliminate stiffening ring
* The cantilever design only allows this at free end of the torque tube
* The deformation of the free end of the pole support structure can not be controlled due to limited space between the torque tube and pole support structure

Topology Philosophy: Robust Method of Joining Parts

* Welding is the most robust method of joining parts
* Shear pins are only reliable as their names imply for transferring shear
* It never can be known if the loads are transferred to a...