Rotor, permanent magnet motor and powertrain

A permanent magnet motor, comprising at least one stator structure and at least one rotor, wherein a rotor of the at least one rotor comprises at least two rotor assemblies disposed coaxially, and wherein:

• the at least two rotor assemblies comprise a first rotor assembly and a second rotor assembly that is attached to the first rotor assembly;
• the first rotor assembly comprises a plurality of first rotor laminations stacked in an axial direction of the rotor, wherein each of the plurality of first rotor laminations is in contact with at least one adjacent first rotor lamination, each first rotor lamination is provided with a plurality of first permanent magnet slot groups, and the plurality of first permanent magnet slot groups are evenly arranged in a circumferential direction of each first rotor lamination;
• each first permanent magnet slot group comprises at least one first permanent magnet slot, a first permanent magnet is disposed in each first permanent magnet slot, and a first boss is disposed at one end that is of each first permanent magnet slot and that is closer to an outer edge of a first rotor lamination than a center of the first rotor lamination;
• the second rotor assembly comprises a plurality of second rotor laminations stacked in the axial direction of the rotor, wherein each of the plurality of second rotor laminations is in contact with at least one adjacent second rotor lamination, each second rotor lamination is provided with a plurality of second permanent magnet slot groups, and the plurality of second permanent magnet slot groups are evenly arranged in a circumferential direction of each second rotor lamination;
• each second permanent magnet slot group comprises at least one second permanent magnet slot, a second permanent magnet is disposed in each second permanent magnet slot, and a second boss is disposed at one end that is of each second permanent magnet slot and that is closer to an outer edge of a second rotor lamination than a center of the second rotor lamination;
• and
• in the axial direction of the rotor, each first permanent magnet slot of the at least one first permanent magnet slot and each second permanent magnet slot of the at least one second permanent magnet slot that are in a same corresponding location are communicatively coupled to each other.

A powertrain, wherein the powertrain comprises a permanent magnet motor, wherein the permanent magnet motor comprises at least one stator structure and at least one rotor, wherein a rotor of the at least one rotor comprises at least two rotor assemblies disposed coaxially, and wherein:

• the at least two rotor assemblies comprise a first rotor assembly and a second rotor assembly that is attached to the first rotor assembly;
• the first rotor assembly comprises a plurality of first rotor laminations stacked in an axial direction of the rotor, wherein each of the plurality of first rotor laminations is in contact with at least one adjacent first rotor lamination, each first rotor lamination is provided with a plurality of first permanent magnet slot groups, and the plurality of first permanent magnet slot groups are evenly arranged in a circumferential direction of each first rotor lamination;
• each first permanent magnet slot group comprises at least one first permanent magnet slot, a first permanent magnet is disposed in each first permanent magnet slot, and a first boss is disposed at one end that is of each first permanent magnet slot and that is closer to an outer edge of a first rotor lamination than a center of the first rotor lamination;
• the second rotor assembly comprises a plurality of second rotor laminations stacked in the axial direction of the rotor, wherein each of the plurality of second rotor laminations is in contact with at least one adjacent second rotor lamination, each second rotor lamination is provided with a plurality of second permanent magnet slot groups, and the plurality of second permanent magnet slot groups are evenly arranged in a circumferential direction of each second rotor lamination;
• each second permanent magnet slot group comprises at least one second permanent magnet slot, a second permanent magnet is disposed in each second permanent magnet slot, and a second boss is disposed at one end that is of each second permanent magnet slot and that is closer to an outer edge of a second rotor lamination than a center of the second rotor lamination;
• and
• in the axial direction of the rotor, each first permanent magnet slot of the at least one first permanent magnet slot and each second permanent magnet slot of the at least one second permanent magnet slot that are in a same corresponding location are communicatively coupled to each other.