Method of minimizing rotor body windage loss
AssigneeGeneral Electric Company
InventorsWei Tong, Brian E. B. Gott
Life of this patent
Estimating the term…
Abstract
In a rotating electric machine including a rotor and a stator surrounding said rotor in substantially concentric relation therewith to establish a gap therebetween, and wherein the stator is formed with a plurality of radially oriented slots, each slot receiving a stator bar held in place by a wedge, an arrangement to minimize rotor windage loss wherein each wedge substantially fills its respective slot such that an end surface of the wedge is substantially flush with adjacent surfaces of the stator.
Claims5
A method of reducing rotor body windage loss in a rotary electric machine having a rotor and a stator surrounding said rotor in substantially concentric relationship therewith, and wherein the stator is formed with a plurality of radially oriented slots, each slot defined by a pair of parallel side walls, and having at least one stator bar therein, the method comprising:
- a) providing a wedge having a dovetail mounting portion for sliding engagement within said slot at a location radially inward of said stator bar to thereby hold said stator bar in said slot;
- and
- b) forming said wedge to leave an unfilled space at a radially innermost end of the slot, the unfilled space having a depth hswd as measured from an entrance to the slot to said wedge, and a width bs as measured between said pair of parallel side walls, and wherein a slot aspect ratio A as defined by hswd/bs is equal to about 0.80.
Dependencies are inferred from the claim text.