A rotor, comprising: a rotor core, the rotor core having a plurality of flux barrier units and at least two annular magnetic flux channels, wherein, the plurality of flux barrier units includes a plurality of flux barrier groups, the plurality of flux barrier groups surround an axis of the rotor core, each of the plurality of flux barrier units is a barrier for magnetic flux, and the at least two annular magnetic flux channels penetrate through the plurality of flux barrier units, so that some of the plurality of flux barrier units are divided into a plurality of sub-units; a plurality of rotor bars being arranged along an edge of the rotor core, the plurality of flux barrier units respectively extending from one of the plurality of rotor bars to another one of the plurality of rotor bars, and the at least two annular magnetic flux channels penetrate through the plurality of flux barrier units and surrounding the axis of the rotor core and the at least two annular magnetic flux channels and a gap between the adjacent flux barrier units are channels for magnetic flux; wherein the at least two annular magnetic flux channels are spaced apart from the plurality of rotor bars by at least one of the plurality of flux barrier units, and the flux barrier units in each of the plurality of flux barrier groups are arranged in a radial direction of the rotor core, characterized in that the annular magnetic flux channels are concentric circles and at least two of the annular magnetic flux channels are spaced apart from the plurality of rotor bars each by at least one of the plurality of flux barrier units. a rotor core, the rotor core having a plurality of flux barrier units and at least two annular magnetic flux channels, wherein, the plurality of flux barrier units includes a plurality of flux barrier groups, the plurality of flux barrier groups surround an axis of the rotor core, each of the plurality of flux barrier units is a barrier for magnetic flux, and the at least two annular magnetic flux channels penetrate through the plurality of flux barrier units, so that some of the plurality of flux barrier units are divided into a plurality of sub-units; a plurality of rotor bars being arranged along an edge of the rotor core, the plurality of flux barrier units respectively extending from one of the plurality of rotor bars to another one of the plurality of rotor bars, and the at least two annular magnetic flux channels penetrate through the plurality of flux barrier units and surrounding the axis of the rotor core and the at least two annular magnetic flux channels and a gap between the adjacent flux barrier units are channels for magnetic flux; wherein the at least two annular magnetic flux channels are spaced apart from the plurality of rotor bars by at least one of the plurality of flux barrier units, and the flux barrier units in each of the plurality of flux barrier groups are arranged in a radial direction of the rotor core, characterized in that the annular magnetic flux channels are concentric circles and at least two of the annular magnetic flux channels are spaced apart from the plurality of rotor bars each by at least one of the plurality of flux barrier units.