METHOD OF APPLYING OUTER INSULATION TO A BARE STATOR BAR
First Claim
1. A method of applying an outer insulation to a bare stator bar of an electric machine to form an insulated stator bar, the method comprising the steps of:
- forming a bare stator bar comprising strands of electrical conductors oriented parallel to each other and strand electrical insulation surrounding each of the strands of electrical conductors;
extruding the outer insulation to comprise at least one extruded member containing an electrical insulation material, the at least one extruded member having an inner cavity extending a longitudinal length thereof and an opposing pair of edges parallel to the longitudinal length thereof;
inserting the bare stator bar into the inner cavity of the outer insulation so that the outer insulation surrounds a perimeter of the bare stator bar and extends along a longitudinal length thereof; and
then attaching together the opposing pair of edges of the at least one extruded member so that the perimeter of the bare stator bar is entirely enclosed by the at least one extruded member;
wherein the at least one extruded member is extruded so that the opposing pair of edges comprise interlocking features that physically secure the edges together as a result of the attaching step, each of the interlocking features is continuous along a corresponding one of the edges so as to be substantially parallel to the longitudinal length of the bare stator bar, and the opposing pair of edges abut each other to define a seam that is substantially parallel to the longitudinal length of the bare stator bar.
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Accused Products
Abstract
A method of applying an outer insulation to a bare stator bar to form an insulated stator bar. The method entails extruding at least one extruded member that will form the outer insulation. The extruded member has an opposing pair of edges that are parallel to the longitudinal length of the extruded member. In addition, the extrusion process creates an inner cavity that extends the longitudinal length of the extruded member. A bare stator bar is then inserted into the inner cavity of the outer insulation so that the outer insulation surrounds the perimeter of the bar and extends along a longitudinal length thereof. The opposing pair of edges of the extruded member are then attached together so that the perimeter of the bar is entirely enclosed by the extruded member.
8 Citations
8 Claims
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1. A method of applying an outer insulation to a bare stator bar of an electric machine to form an insulated stator bar, the method comprising the steps of:
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forming a bare stator bar comprising strands of electrical conductors oriented parallel to each other and strand electrical insulation surrounding each of the strands of electrical conductors; extruding the outer insulation to comprise at least one extruded member containing an electrical insulation material, the at least one extruded member having an inner cavity extending a longitudinal length thereof and an opposing pair of edges parallel to the longitudinal length thereof; inserting the bare stator bar into the inner cavity of the outer insulation so that the outer insulation surrounds a perimeter of the bare stator bar and extends along a longitudinal length thereof; and
then attaching together the opposing pair of edges of the at least one extruded member so that the perimeter of the bare stator bar is entirely enclosed by the at least one extruded member;wherein the at least one extruded member is extruded so that the opposing pair of edges comprise interlocking features that physically secure the edges together as a result of the attaching step, each of the interlocking features is continuous along a corresponding one of the edges so as to be substantially parallel to the longitudinal length of the bare stator bar, and the opposing pair of edges abut each other to define a seam that is substantially parallel to the longitudinal length of the bare stator bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification