Tubular electrical machines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Mar 29, 2007
app pub date -
Sep 20, 2006
filing date -
Sep 22, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A stator for a tubular electrical generator or motor has a substantially cylindrical inner surface containing a series of axially-spaced slots for receiving the coils of a stator winding. The stator is formed from a plurality of stacked annular laminations that define the slots and the inner surface. The laminations comprise circumferentially-spaced radial slits defining fingers that extend radially outwards from their radially inner edges. The slits and fingers reduce the overall eddy losses in the stator while permitting simple manufacture, simple assembly and high radial thermal conduction for good cooling. In an alternative embodiment, the laminations and their fingers may be replaced by layers of batons of similar radial extent to the laminations.
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