Stator winding connection arrangement
View Patent ↗An electric machine a cylindrical stator core having an outer perimeter surface and an inner perimeter surface with a plurality of slots formed between the inner perimeter surface and the outer perimeter surface. The inner perimeter surface defines an inner cylindrical space for the stator that extends in an axial direction within the stator. The stator core is configured to retain a winding arrangement comprised of a plurality of conductor segments positioned in the plurality of slots of the stator core. The winding arrangement further includes a jumper extending into the inner cylindrical space and connecting two of the plurality of conductor segments. Accordingly, the jumper appears as a chord of a circular end shape of the stator core.
1. A stator for an electric machine comprising:
a cylindrical stator core including an outer perimeter surface and an inner perimeter surface with a plurality of slots formed between the inner perimeter surface and the outer perimeter surface, the inner perimeter surface defining an inner cylindrical space that extends in an axial direction within the stator, the inner cylindrical space extending past the cylindrical stator core;
a plurality of conductor segments positioned in the plurality of slots; and
a jumper including a straight portion extending into the inner cylindrical space and connecting two of the plurality of conductor segments, the jumper providing a phase connection member including a phase tapping location where a phase terminal is connected to the phase connection member.
2. The stator of claim 1 wherein the jumper includes a leg at an end of the straight portion coupled to one of the plurality of conductor segments.
3. The stator of claim 2 wherein each of the opposing ends of the stator core define a circular shape, and wherein the straight portion of the jumper appears as a chord of the circular shape when viewed from one of the opposing ends the stator core.
4. The stator of claim 3 wherein the jumper is a first jumper, the stator further comprising a second jumper connecting another two of the plurality of conductor segments.
5. The stator of claim 4 wherein the second jumper is generally arc shaped and appears to extend along the circular shape when viewed from the one of the opposing ends of the stator core.
6. The stator of claim 5 wherein the first jumper and the second jumper are tied together with an electrically insulative material.
7. The stator of claim 1 wherein the plurality of conductor segments are connected to form a multi-phase winding on the stator.
8. The stator of claim 7 wherein the phase connection member is a first phase connection member, the stator further comprising a second phase connection member and a third phase connection member, wherein the second phase connection member includes a straight portion that extends within the inner cylindrical space between another two of the plurality of conductor segments, and wherein the third phase connection member includes an arcuate portion that extends along one of the opposing ends of the stator core between yet another two of the plurality of conductor segments.
9. The stator of claim 1 wherein the plurality of conductor segments includes a plurality of series connected phase windings on the stator core, and wherein the stator further comprises a plurality of series winding connection loops, each series winding connection loop including an arcuate portion that extends along one of the opposing ends of the stator core and connects two of the phase windings in series.