Method and apparatus to reduce losses in a compact high speed generator

A stator for a generator having a rotor, comprising:

• a slot having a cut-out portion adjacent a slot opening;
• wherein the cut-out portion is V-shaped;
• and
• a retention component configured to be inserted into the slot, wherein the retention component includes:
• a first segment and a second segment;
• wherein the first and second segments are made of a magnetic material;
• wherein at least one of the first and second segments has an inner lateral side and an outer lateral side;
• wherein the outer lateral side has two sloping planar surfaces in a V-shaped configured to mate with the cut-out portion of the slot;
• a longitudinally extending channel between the first and second segments;
• wherein the channel has an interfacing opening that interfaces a rotor surface in an absence of a structure therebetween;
• and
• a third segment that extends along and within the channel, wherein the third segment directly contacts the first and second segments;
• wherein the third segment is rod-shaped and less magnetic than the first and second segments, and at least one portion of the longitudinally extending channel extends between sidewalls of the first and second segments that are not in contact with the third segment;
• wherein the third segment is insertable into the channel, where insertion of the third segment into the channel secures the outer lateral side of the first segment and the outer lateral side of the second segment against surfaces of the cut-out portion of the slot.

A generator having a rotor and a stator, comprising

• a plurality of tooth elements on the stator;
• a plurality of slots that alternate with the tooth elements;
• and
• a retention component insertable into the slot and configured to retain a coil insertable into the slot, wherein the retention component includes:
• a first segment made of first laminated sheets of a first magnetic material;
• wherein the first segment includes a first outer lateral side having a V-shaped configuration;
• a second segment made of second laminated sheets of a second magnetic material;
• wherein the second segment includes a second outer lateral side having a V-shaped configuration;
• wherein one of the V-shaped configurations of the first and second segments has unequal length sides;
• a channel between the first and second segments;
• wherein the channel consists of planar walls and arcuate walls;
• and
• a third segment that is rod-shaped, and extends along and within the channel, directly contacting the first and second segments, wherein the planar walls are not in contact with the third segment, where the third segment is insertable into the channel, where insertion of the third segment into the channel secures the first outer lateral side and the second outer lateral side against surfaces of the slot;
• wherein a diameter of the third segment is greater than a height of at least one of the first and second segments;
• wherein the third segment is made of a non-magnetic material;
• wherein the third segment interfaces a rotor surface in an absence of a structure therebetween.