Method for manufacturing a composite sleeve for an electric motor
AssigneeKollmorgen Technologies Corporation
InventorGerald W. Brown
Life of this patent
Estimating the term…
Abstract
In an electric motor having a plurality of magnets bonded to a rotor hub, a composite sleeve is disposed over the rotor hub and magnets. The composite sleeve may be wound directly upon the rotor hub, or the composite sleeve may be wound upon a mandrel and slid over the rotor hub.
Claims6
A method for manufacturing a composite sleeve for a hollow rotor hub, having a plurality of magnets bonded thereto, for an electric motor or generator, which comprises the steps of:
- winding the composite sleeve upon a mandrel having a diameter less than that of the rotor hub;
- cooling the hollow rotor hub/magnet assembly until it shrinks to a diameter less than that of the sleeve;
- inserting the rotor hub magnet assembly into the composite sleeve;
- and
- heating the hollow rotor hub magnet/sleeve assembly until it expands to a diameter larger than the shaft and then inserting the shaft into the rotor hub, with an interference fit shaft to rotor hub/magnet/sleeve assembly such that there is an interference fit between the composite sleeve and the rotor hub/magnet assembly.
A method for manufacturing a composite sleeve for a hollow rotor hub, having a plurality of magnets bonded thereto, for an electric motor or generator which comprises the steps of:
- winding the composite sleeve upon a mandrel having a diameter less than that of the rotor hub;
- cooling the hollow rotor hub magnet assembly until it shrinks to a diameter less than that of the sleeve;
- inserting the rotor hub magnet assembly into the composite sleeve;
- and
- heating the hollow rotor hub magnet/sleeve assembly to expand it and then pressing the hollow rotor hub onto the shaft with an interference fit shaft to rotor hub/magnet/sleeve assembly such that there is an interference fit between the composite sleeve and the rotor hub/magnet assembly.
A method of manufacturing a composite sleeve for a hollow rotor hub, having a plurality of magnets bonded thereto, for an electric motor or generator, which comprises the steps of:
- winding the composite sleeve directly on the rotor hub magnet assembly at room temperature;
- allowing the matrix of the composite sleeve to initially set up at a relatively low temperature above room temperature;
- bringing the composite sleeve and the rotor hub magnet assembly to a cure temperature;
- allowing the composite sleeve to return to room temperature;
- and
- heating the hollow rotor hub magnet/sleeve assembly until it expands to a diameter larger than the shaft and then inserting the shaft into the rotor hub, with an interference fit shaft to rotor hub/magnet/sleeve assembly such that there is an interference fit between the composite sleeve and the rotor hub/magnet assembly.
A method of manufacturing a composite sleeve for a rotor hub, having a plurality of magnets bonded thereto, for an electric motor or generator, which comprises the steps of:
- winding the composite sleeve directly on the rotor hub magnet assembly at room temperature;
- allowing the matrix of the composite sleeve to initially set up at a relatively low temperature above room temperature;
- bringing the composite sleeve and the rotor hub/magnet assembly to a cure temperature;
- allowing the composite sleeve to return to room temperature;
- and
- heating the hollow rotor hub/magnet/sleeve assembly to expand it and then pressing the hollow rotor hub/magnet sleeve assembly onto the shaft with an interference fit shaft to rotor hub/magnet/sleeve assembly such that there is an interference fit between the composite sleeve and the rotor hub/magnet assembly.
Dependencies are inferred from the claim text.