Winding for a rotating electric machine and method for manufacturing same
View Patent ↗A winding for a rotating electric machine includes conductive bars having straight parts and end windings and terminal portions of the end windings that are connected together. A protective cap is disposed on at least a portion of each respective connected end winding terminal portion. An electrical insulating material is disposed between each end winding terminal portion and respective protective cap and a seal is inside each protective cap.
1. A winding for a rotating electric machine comprising:
conductive bars including straight parts and end windings;
terminal portions of the end windings that are connected together;
a protective cap disposed on each respective whole connected end winding terminal portion;
an electrical insulating material disposed between each end winding terminal portion and respective protective cap; and
a polymerized liquid resin seal inside of each of the protective caps.
2. The winding recited in claim 1 , wherein a material of the seals is different from the electrical insulating material.
3. The winding recited in claim 1 , wherein a material of the seals is an electrically insulating material.
4. The windings recited in claim 1 , wherein a material of the seals is an electrically conductive material.
5. The winding recited in claim 1 , wherein the seals cover at least a portion of an external surface of the caps.
6. The winding recited in claim 5 , wherein the seals completely cover the external surface of the caps.
7. The winding recited in claim 1 , wherein the seals cover at least a portion of the end windings that is outside of the caps.
8. The winding recited in claim 1 , wherein the seals are flexible.
9. The winding recited in claim 1 , wherein the winding is a stator winding.
10. The winding recited in claim 1 , wherein the winding is a rotor winding.
11. A method for manufacturing a winding for a rotating electric machine, the method comprising:
providing conductive bars including straight parts and end windings;
connecting terminal portions of the end windings;
providing a protective cap above each whole connected end winding terminal portion;
providing an electrical insulating material between each end winding terminal portion and respective cap; and
providing a seal for the inside of each of the caps by spreading a liquid resin and then polymerizing the liquid resin.
12. The method recited in claim 11 , wherein the seals include a material that is different from the electrical insulating material.
13. The method recited in claim 11 , wherein the spreading includes spreading the liquid resin on at least a portion of an external surface of the caps.
14. The method recited in claim 11 , wherein the spreading includes spreading the liquid resin on at least a portion of the end windings that is outside of the caps.