Electric machine with fully enclosed in-slot conductors

摘要

An electric machine includes a core with a plurality of slots. A plurality of electric conductors are positioned in the slots. Each of the plurality of electric conductors includes a U-turn portion extending between two in-slot portions and connection ends extending from the in-slot portions. The connection ends are positioned on an opposite end of the core from the U-turn portions. A plurality of insulation tubes are positioned in the plurality of slots. The in-slot portions of the electric conductors extend through the insulation tubes.

主权项

1. An electric machine comprising:
a core with a plurality of slots; a plurality of electric conductors positioned in the slots, each of the plurality of electric conductors including a U-turn portion extending between two in-slot portions and connection ends extending from the in-slot portions, the connection ends extending from an opposite end of the core from the U-turn portion, each of the plurality of electric conductors including a resin material providing an electrically insulating coating over the entire conductor extending along the U-turn portion and the in-slot portions but not included on tips of the connection ends, the plurality of electric conductors forming a multi-phase winding on the core; a plurality of insulation tubes positioned in each of the plurality of slots, each of the plurality of insulation tubes defining a single channel, the in-slot portions of the electric conductors extending through the insulation tubes with at least two in-slot portions of the plurality of electric conductors extending through each insulation tube, wherein each insulation tube in each slot separates a first group of electric conductors from a second group of electric conductors in the slot, the first group of electric conductors associated with a different phase of the multi-phase winding from the second group of electric conductors; and an inner layer lining the single channel of each insulation tube such that the inner layer is positioned in between the insulation tube and the at least two in-slot portions extending through the insulation tube, each inner layer comprised of a filler paper material, and each inner layer in contact with the at least two in-slot portions of the plurality of electric conductors extending through the insulation tube.