US 11,705,771 B2
Electric machines having insulation formed on laminated structures
Christopher Paul Richardson, Fort Wayne, IN (US); Frederick McFarland, Fort Wayne, IN (US); Daniel M. Saban, South Elgin, IL (US); and Allan R. Knerr, Fort Wayne, IN (US)
Assigned to Essex Furukawa Magnet Wire USA LLC, Atlanta, GA (US)
Filed by Essex Furukawa Magnet Wire USA LLC, Atlanta, GA (US)
Filed on Aug. 10, 2021, as Appl. No. 17/398,973.
Application 17/398,973 is a continuation in part of application No. 17/316,333, filed on May 10, 2021, granted, now 11,352,521.
Application 17/316,333 is a continuation in part of application No. 17/003,503, filed on Aug. 26, 2020, granted, now 11,004,575.
Application 17/003,503 is a continuation in part of application No. 16/403,665, filed on May 6, 2019, granted, now 10,796,820.
Claims priority of provisional application 63/063,703, filed on Aug. 10, 2020.
Prior Publication US 2021/0367471 A1, Nov. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 3/12 (2006.01); H02K 3/34 (2006.01)
CPC H02K 3/345 (2013.01) [H02K 3/12 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electric machine comprising:
an armature; and
a field component;
wherein at least one of the armature or the field component comprises:
a plurality of conductive elements;
a laminated structure comprising a plurality of slots into which the plurality of conductive elements are positioned; and
a polymeric insulation layer formed directly on the laminated structure at least within the plurality of slots, the polymeric insulation layer comprising a filler dispersed in a base polyimide material, the filler comprising between 20 percent and 80 percent by weight of silica oxide and between 20 and 80 percent by weight of titanium oxide, wherein the polymeric insulation layer has a thermal index of 260° C. or greater.