US 11,056,942 B2
Electric machine rotor cooling systems and methods
Thomas H. Hopkins, Wheat Ridge, CO (US); Felipe J. Castillo, Wheat Ridge, CO (US); Scott T. Graham, Wheat Ridge, CO (US); and Keith W. Klontz, Wheat Ridge, CO (US)
Assigned to Zero E. Technologies, LLC, Wheat Ridge, CO (US)
Filed by Zero E Technologies, LLC, Wheat Ridge, CO (US)
Filed on Oct. 28, 2020, as Appl. No. 17/82,930.
Application 16/368,291 is a division of application No. 16/228,353, filed on Dec. 20, 2018, granted, now 10,505,421, issued on Dec. 10, 2019.
Application 16/228,353 is a division of application No. 15/870,472, filed on Jan. 12, 2018, granted, now 10,177,631, issued on Jan. 8, 2019.
Application 17/082,930 is a continuation of application No. 16/368,291, filed on Mar. 28, 2019, granted, now 10,855,127.
Application 16/368,291 is a continuation of application No. 15/870,458, filed on Jan. 12, 2018, granted, now 10,256,688, issued on Apr. 9, 2019.
Application 15/870,458 is a continuation of application No. 15/870,420, filed on Jan. 12, 2018, granted, now 10,256,700, issued on Apr. 9, 2019.
Claims priority of provisional application 62/570,441, filed on Oct. 10, 2017.
Prior Publication US 2021/0044169 A1, Feb. 11, 2021
Int. Cl. H02K 1/32 (2006.01); H02K 9/22 (2006.01); H02K 3/44 (2006.01); H02K 3/30 (2006.01); H02K 3/32 (2006.01); H02K 1/14 (2006.01); H02K 3/18 (2006.01); H02K 5/15 (2006.01); H02K 1/27 (2006.01); H02K 1/04 (2006.01); H02K 1/18 (2006.01); H02K 1/28 (2006.01); H02K 5/08 (2006.01); H02K 5/18 (2006.01); H02K 7/00 (2006.01); H02K 9/06 (2006.01); H02K 9/08 (2006.01); H02K 9/19 (2006.01); H02K 11/25 (2016.01); H02K 1/12 (2006.01); H02K 5/24 (2006.01); H02K 7/08 (2006.01); H02K 15/10 (2006.01); H02K 15/14 (2006.01); H02K 5/06 (2006.01)
CPC H02K 1/32 (2013.01) [H02K 1/04 (2013.01); H02K 1/12 (2013.01); H02K 1/148 (2013.01); H02K 1/18 (2013.01); H02K 1/272 (2013.01); H02K 1/278 (2013.01); H02K 1/28 (2013.01); H02K 3/18 (2013.01); H02K 3/30 (2013.01); H02K 3/325 (2013.01); H02K 3/44 (2013.01); H02K 5/08 (2013.01); H02K 5/15 (2013.01); H02K 5/18 (2013.01); H02K 5/24 (2013.01); H02K 7/003 (2013.01); H02K 7/083 (2013.01); H02K 9/06 (2013.01); H02K 9/08 (2013.01); H02K 9/19 (2013.01); H02K 9/22 (2013.01); H02K 11/25 (2016.01); H02K 15/105 (2013.01); H02K 15/14 (2013.01); H02K 5/06 (2013.01); H02K 2203/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric machine rotor comprising:
a shaft;
a rotor back assembly surrounding a portion of the shaft; and
a plurality of permanent magnets distributed at equal radial distance from the shaft around the rotor back assembly;
a plurality of gaps, with each gap being positioned between two adjacent permanent magnets;
a plurality of thermally conductive encapsulant structures, with one thermally conductive encapsulant structure being positioned within each gap, wherein each of the thermally conductive encapsulant structures is physically separated from adjacent thermally conductive encapsulant structures; and
a plurality of heat transfer structures with at least one of the plurality of heat transfer structures extending beyond an outer surface of each of the plurality of thermally conductive encapsulant structures, wherein each of the plurality of heat transfer structures is in physical contact with no more than one of the plurality of thermally conductive encapsulant structures, and wherein each of the plurality of heat transfer structures is physically separated from adjacent heat transfer structures.