Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-10-14
2001-06-19
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S07500D, C310S192000
Reexamination Certificate
active
06249070
ABSTRACT:
The present invention relates to a rotating assembly and in particular to an assembly in which rotating components are supported one from another.
It is common practice to support rotating components, such as shafts, in spaced relationship by ball or roller bearings. However, this necessitates the use of lubrication with its attendant need for complicated flow path structure and seals. It is known to support a single component in space for the purpose of rotation, by use of the stator and rotor principle. Wire wound stator poles surround a magnetically permeable component and by passing electrical currents through the wires electromagnetic forces are generated which cause the component to move to a position in space, equidistant from the end faces of the poles. The component is then rotated by other power means and the need for lubrication is obviated.
The present invention seeks to provide a rotating assembly in which one component is supported from another by means other than solid, lubricated bearings.
According to the present invention an assembly comprises components capable of relative rotational movement and including electrical stator means for electromagnetically supporting said components for rotation, wherein one of said components has a low or non magnetically permeable insert portion and electrical stator means is positioned with respect thereto, to pass electromagnetic flux through said insert portion to support another component.
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Oliff & Berridg,e PLC
Perez Guillermo
Ramirez Nestor
Rolls-Royce plc
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