US 12,308,719 B2
Multiple potting material structures
Abbas A. Alahyari, Glastonbury, CT (US); Jagadeesh K. Tangudu, South Windsor, CT (US); Andrzej Ernest Kuczek, Bristol, CT (US); and Kimberly Rae Saviers, Glastonbury, CT (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 11, 2023, as Appl. No. 18/133,038.
Prior Publication US 2024/0348119 A1, Oct. 17, 2024
Int. Cl. H02K 1/12 (2006.01); H02K 3/32 (2006.01); H02K 15/10 (2006.01)
CPC H02K 3/32 (2013.01) [H02K 1/12 (2013.01); H02K 15/105 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stator for an electrical machine, comprising:
a plurality of windings, each winding forming a coil and end connections;
a first potting material having a first viscosity and a first thermal conductivity, wherein the first potting material is disposed on each coil and fills gaps between each coil;
a second potting material different from the first potting material and having a second viscosity and a second thermal conductivity, wherein the second viscosity is higher than the first viscosity and the second thermal conductivity is higher than the first thermal conductivity, wherein the second potting material is disposed on each of the end connections to provide increased thermal conductivity from the end connections; and
a transition material between the first and second potting materials, the transition material configured to at least one of: (i) aid in bonding disparate chemistries of the first and second potting materials or (ii) prevent issues involving different coefficients of thermal expansion of the first and second potting materials.