Patent ID: 9742227
Date: 2017-08-22
CPC Classifications: B25J,H02K

Claim:
1. An electric machine, comprising: a first outer carrier comprising electromagnetic elements; a second outer carrier comprising electromagnetic elements; an inner carrier comprising electromagnetic elements and disposed between the first outer carrier and the second outer carrier, either the inner carrier, or both the first outer carrier and the second outer carrier, defining magnetic poles; a spacer element fixedly connecting, the first outer carrier to the second outer carrier; bushings or low friction coatings disposed between the inner carrier and the first and second outer carriers, and between the inner carrier and the spacer element, for supporting the inner carrier for movement relative to the first outer carrier and the second outer carrier; the magnetic poles have a pole pitch S in mm; the first outer carrier, second outer carrier and inner carrier together define a size of the electric machine; the inner carrier defining the magnetic poles, and the electromagnetic elements of the first and second outer carriers including posts, with slots between the posts, one or more electric conductors in each slot, the posts having a post height in mm, or the first and second outer carriers defining the magnetic poles, the electromagnetic elements of the inner carrier including posts, with slots between the posts, one or more electric conductors in each slot, the posts having a post height in mm; the size of the electric machine, pole pitch and post height being selected to fall within a region in a space defined by size, pole pitch and post height, the region being defined by either 1) a first union of: the first set of inequalities and the second set of inequalities being respectively sets of inequalities A and B, or B and C, or C and D, in which the set of inequalities A is for a size of 25 mm, the set of inequalities B is for a size of 50 mm, the set of inequalities C is for a size of 100 mm, the set of inequalities D is for a size of 200 mm; or 2) a second union of a surface as defined by set of inequalities D and a corresponding set of all points with size greater than the surface but with pole pitch and post height corresponding to points within the surface; where A is selected from the group of sets of inequalities consisting of: Set A1: Set A2: Set A3: B is selected from the group of sets of inequalities consisting of: Set B1: Set B2: Set B3: C is selected from the group of sets of inequalities consisting of: Set C1: Set C2: Set C3: and D is selected from the group of sets of inequalities consisting of: Set D1: Set D2: Set D3: