Permanent magnet electric machine having magnets provided with a thermal enhancement bonding coating
A rotor assembly for a permanent magnet electric machine includes a plurality of rotor laminations joined to form a rotor body. Each of the plurality of rotor laminations includes a plurality of slots. One or more permanent magnets are mounted within respective ones of the plurality of slots. Each of the one or more permanent magnets includes a thermal enhancement bonding coating. A method of forming a rotor assembly is also disclosed.
1. A rotor assembly for a permanent magnet electric machine comprising:
a plurality of rotor laminations joined to form a rotor body, each of the plurality of rotor laminations including a plurality of slots; and
one or more permanent magnets mounted within respective ones of the plurality of slots, each of the one or more permanent magnets including a thermal enhancement bonding coating.
2. The rotor assembly according to claim 1 , wherein the thermal enhancement bonding coating comprises a solder paste including a solder material and a flux material.
3. The rotor assembly according to claim 2 , wherein the solder material comprises tin.
4. The rotor assembly according to claim 2 , wherein the flux material comprises a thermal interface material.
5. The rotor assembly according to claim 4 , wherein the thermal interface material comprises one of a metal and a ceramic.
6. The rotor assembly according to claim 5 , wherein the metal comprises at least one of aluminum and copper.
7. The rotor assembly according to claim 5 , wherein the ceramic comprises at least one of boron nitride and beryllium oxide.
8. A permanent magnet electric machine comprising:
a housing;
a stator mounted within the housing; and
a rotor assembly rotatably mounted within the housing relative to the stator, the rotor assembly including a plurality of rotor laminations, each of the plurality of rotor laminations including a plurality of slots and one or more permanent magnets mounted within respective ones of the plurality of slots, each of the one or more permanent magnets including a thermal enhancement bonding coating.
9. The rotor assembly according to claim 8 , wherein the thermal enhancement bonding coating comprises a solder paste including a solder material and a flux material.
10. The rotor assembly according to claim 9 , wherein the solder material comprises tin.
11. The rotor assembly according to claim 9 , wherein the flux material comprises a thermal interface material.
12. The rotor assembly according to claim 11 , wherein the thermal interface material comprises one of a metal and a ceramic.
13. The rotor assembly according to claim 12 , wherein the metal comprises at least one of aluminum and copper.
14. The rotor assembly according to claim 12 , wherein the ceramic comprises at least one of boron nitride and beryllium oxide.