Back to results
US 6,274,957 B1Granted
Reduced size electromagnetic device
AssigneeEmerson Electric Co.
InventorsJeffrey P. Mahn, Charles P. Ketterer, Jeffrey D. Neumann, Todd Andrew Walls, Bradley Gerard Kohring
Life of this patent
Estimating the term…
Abstract
An electromagnetic device of significantly reduced size is provided by the specific designs of the end shields of the device and by the specific designs of insulating end caps of the device that insulate the electrical component parts of the device from contact and possible shorting with mechanical structural parts of the device.
Claims18
An electromagnetic device comprising:
- a stator stack having a longitudinal length with longitudinally opposite first and second end surfaces, an exterior surface between the first and second end surfaces and a center bore through the stator stack between the first and second end surfaces,
- first and second end shields covering over the respective first and second end surfaces of the stator stack, the first and second end shields each have a shaft opening aligned with the center bore of the stator stack, each of the end shields has a base surface that mates against one of the first and second end surfaces of the stator stack, and the first end shield has a shoulder that projects outwardly from the base surface of the first end shield and overlays a portion of the stator stack exterior surface, the shoulder has a shoulder surface that mates against the portion of the stator stack exterior surface and resists a relative torsional movement between the stator stack and the first end shield, the base surface and the shoulder surface are perpendicular to each other, the shoulder surface and the portion of the stator stack exterior surface are both flat surfaces;
- and,
- a plurality of threaded fasteners extend between the first and second end shields through the base surfaces of the first and second end shields and over the exterior surface of the stator stack and secure the first and second end shields to the respective first and second end surfaces of the stator stack.
1 more element
An electromagnetic device comprising:
- a stator stack having a longitudinal length with longitudinally opposite first and second end surfaces, an exterior surface between the first and second end surfaces, a center bore through the stator stack between the first and second end surfaces, and a stator winding around the center bore;
- an end cap covering over the first end surface of the stator stack;
- a first end shield covering over the end cap, the end cap spacing the first end shield from the stator winding;
- an insulator covering over the second end surface of the stator stack;
- a second end shield covering over the insulator, the insulator insulating the stator winding from the second end shield;
- and,
- the insulator has a tubular lead guide that projects longitudinally from the insulator, the stator winding has an electric terminal that is supported in the insulator tubular lead guide, the second end shield has a lead opening and the insulator tubular lead guide passes through the lead opening.
4 more elements
An electromagnetic device comprising:
- a stator stack having a longitudinal length with longitudinally opposite first and second end surfaces, an exterior surface between the first and second end surfaces, a center bore through the stator stack between the first and second end surfaces, and a stator winding around the center bore;
- an end cap covering over the first end surface of the stator stack;
- a first end shield covering over the end cap, the end cap spacing the first end shield from the stator winding;
- an insulator covering over the second end surface of the stator stack;
- a second end shield covering over the insulator, the insulator insulating the stator winding from the second end shield;
- and,
- the first end shield has longitudinally projecting columns that extend past the end cap and engage with the first end surface of the stator stack.
4 more elements
An electromagnetic device comprising:
- a stator stack having a longitudinal length with longitudinally opposite first and second end surfaces, an exterior surface between the first and second end surfaces, a center bore through the stator stack between the first and second end surfaces, and a stator winding around the center bore;
- an end cap covering over the first end surface of the stator stack;
- a first end shield covering over the end cap, the end cap spacing the first end shield from the stator winding;
- an insulator covering over the second end surface of the stator stack;
- a second end shield covering over the insulator, the insulator insulating the stator winding from the second end shield;
- and,
- an external electronics package is connected to the second end shield on an opposite side of the second end shield from the insulator and the insulator provides both thermal and electrical insulation of the stator winding from the external electronics package.
4 more elements
Dependencies are inferred from the claim text.