Stator design for permanent magnet motor with combination slot wedge and tooth locator
First Claim
1. A segmented stator for a permanent magnet motor, the stator comprising:
- a plurality of stator segments forming an annular stator yoke and a plurality of stator teeth extending from an edge of the stator yoke;
at least one coupling between adjacent stator segments, the at least one coupling shaped to allow movement of each tooth in a pair of adjacent teeth associated with the adjacent stator segments, wherein each tooth in the pair is separated by a slot extending from a slot opening;
conductive windings wrapped around each tooth of the pair of adjacent teeth and filling a portion of the slot;
a plurality of slot wedges, one wedge of the plurality of slot wedges engaged with each tooth of the pair of adjacent teeth to prevent the conductive windings from moving out of the slot through the slot opening; and
wherein the plurality of wedges prevents movement of each tooth of the plurality of stator teeth with respect to remaining teeth of the plurality of stator teeth.
1 Assignment
0 Petitions
Accused Products
Abstract
A segmented stator for a permanent magnet motor. The stator includes a plurality of stator segments forming an annular stator yoke and a plurality of stator teeth extending from an edge of the stator yoke. At least one coupling is between adjacent stator segments and shaped to allow movement of adjacent teeth in a so-called loose tooth design. Slot wedges are located between adjacent teeth to prevent the, conductive windings from moving out of the slots through the slot openings. The slot wedges also prevent movement of adjacent teeth with respect to one another. The segmented stator can comprise an annular yoke with a plurality of discrete teeth or a plurality of assemblies including a rim section and a tooth section. The slot wedges can be keyed wedges that maintain their position through interlocking and/or can be integrated with a stator bobbin.
93 Citations
20 Claims
-
1. A segmented stator for a permanent magnet motor, the stator comprising:
-
a plurality of stator segments forming an annular stator yoke and a plurality of stator teeth extending from an edge of the stator yoke;
at least one coupling between adjacent stator segments, the at least one coupling shaped to allow movement of each tooth in a pair of adjacent teeth associated with the adjacent stator segments, wherein each tooth in the pair is separated by a slot extending from a slot opening;
conductive windings wrapped around each tooth of the pair of adjacent teeth and filling a portion of the slot;
a plurality of slot wedges, one wedge of the plurality of slot wedges engaged with each tooth of the pair of adjacent teeth to prevent the conductive windings from moving out of the slot through the slot opening; and
wherein the plurality of wedges prevents movement of each tooth of the plurality of stator teeth with respect to remaining teeth of the plurality of stator teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. In a segmented stator for a permanent magnet motor, the stator having a plurality of stator teeth extending a radial distance from a stator core, each tooth of the plurality of stator teeth separated from an adjacent tooth by a slot opening and a slot extending from the slot opening, the improvement comprising:
-
at least one coupling joining a first segment of the stator to a second segment of the stator, wherein the first segment of the stator includes a first stator tooth and the second segment of the stator includes an adjacent second stator tooth, and wherein the at least one coupling is shaped to allow movement of the first stator tooth with respect to the second stator tooth when the first segment and the second segment are joined; and
a wedge engaged with both the first stator tooth and the second stator tooth, wherein the wedge is located in a region of a slot opening between the first stator tooth and the second stator tooth and the wedge has a width at least as wide as the slot opening. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification