US 5,489,810 A · Switched reluctance starter/generator

Abstract

A switched reluctance starter/generator is presented which has a stator mounted within a housing having an outer periphery and a plurality of salient poles defining an inner periphery, the salient poles further defining slots therebetween. A stator cooling sleeve is press fit on the outer periphery of the stator and defines a plurality of cooling channels between the outer periphery of the stator cooling sleeve and the housing. A plurality of phase windings are wound on the plurality of salient stator poles, and phase winding retainers are positioned within the slots for securing the phase windings on the salient stator poles. The winding retainers comprise a triangular base separator, a quasi-dove-tailed retaining member, and two opposing wedge shaped expanders. A rotor assembly is rotatably positioned within the stator, and comprises a hollow shaft assembly and a rotor core having a plurality of salient poles press fit on the outer periphery of the shaft. The hollow shaft assembly comprises an outer sleeve and an inner cooling sleeve. The inner periphery of the inner cooling sleeve defines an interior void of the shaft. The outer periphery of the inner cooling sleeve is press fit on the inner periphery of the outer sleeve and defines a plurality of cooling channels between the inner periphery of the outer sleeve and the outer periphery of the inner cooling sleeve. The stator windings are wound from hollow core conductors, and are coupled to external sources of cooling fluid and electrical energy by electrical/hydraulic terminal connectors.

Claims13

Dependent claims

A switched reluctance starter/generator, comprising:

a housing;
a stator mounted within said housing having an outer periphery and a plurality of salient poles defining an inner periphery, said salient poles further defining slots therebetween;
a stator cooling sleeve having first and second axial ends and an inner periphery and an outer periphery, said inner periphery of said stator cooling sleeve press fit on said outer periphery of said stator, said stator cooling sleeve defining a plurality of cooling channels between said outer periphery of said stator cooling sleeve and said housing;
a plurality of phase windings wound on said first plurality of salient stator poles;
phase winding retention means positioned within said slots for securing said phase windings on said salient stator poles;
and
a rotor assembly rotatably positioned within said stator, said rotor assembly comprising,
a hollow shaft assembly comprising,
an outer sleeve having first and second axial ends, an outer periphery and an inner periphery,
an inner cooling sleeve having first and second axial ends, an outer periphery, and an inner periphery defining an interior void, said outer periphery of said inner cooling sleeve press fit on said inner periphery of said outer sleeve, said inner cooling sleeve defining a plurality of cooling channels between said inner periphery of said outer sleeve and said outer periphery of said inner cooling sleeve,
a rotor core having a plurality of salient poles, said rotor core press fit on said outer periphery of said outer sleeve, and
first and second rotor end plates mounted on each axial end of said rotor core.

9 more elements

A hollow rotor shaft for an electrical machine, comprising:

an outer sleeve having first and second axial ends, an outer periphery and an inner periphery,
an inner cooling sleeve having first and second axial ends, an outer periphery, and an inner periphery defining an interior void, said outer periphery of said inner cooling sleeve press fit into the inner periphery of said outer sleeve, said inner cooling sleeve defining a plurality of cooling channels between said inner periphery of said outer sleeve and said outer periphery of said inner cooling sleeve,
shaft end fittings fixably attached to each of said axial ends of said outer sleeve, said end fittings defining coolant flow orifices therein for communicating coolant to said plurality of cooling channels.

Dependencies are inferred from the claim text.

Switched reluctance starter/generator

Life of this patent

Switched reluctance starter/generator

Life of this patent

Abstract

Claims13