Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle

A permanent magnet auxiliary synchronous reluctance motor, comprising a rotor structure, the rotor structure comprising a rotor body, wherein a permanent magnet groove group is disposed on the rotor body, the permanent magnet groove group comprises an outer layer permanent magnet groove and an inner layer permanent magnet groove, a magnetic conduction channel is formed between the outer layer permanent magnet groove and the inner layer permanent magnet groove which are adjacent, at least one end of the magnetic conduction channel is formed as a deflection segment, and a distance from the deflection segment to a quadrature-axis of the rotor body gradually decreases outward in a radial direction, so that the at least one end of the magnetic conduction channel tends to approach the quadrature-axis;

• wherein the magnetic conduction channel comprises a first component segment, a second component segment and a third component segment connected in sequence, a first end of the first component segment is disposed toward a rotating shaft hole of the rotor body, a second end of the first component segment is disposed to extend toward an outer edge of the rotor body, a first end of the third component segment is disposed toward the rotating shaft hole, a second end of the third component segment is disposed to extend toward the outer edge of the rotor body, the first component segment and the third component segment are located on two sides of a direct axis, a distance from the first component segment to the direct axis gradually increases outward in a radial direction of the rotor body, and the deflection segment is formed at the second end of the first component segment and/or the second end of the third component segment;
• the outer layer permanent magnet groove comprises:
• a first outer layer permanent magnet groove segment, a first end of the first outer layer permanent magnet groove segment being disposed to extend toward the rotating shaft hole, and a second end of the first outer layer permanent magnet groove segment being disposed toward the outer edge of the rotor body;
• and a second outer layer permanent magnet groove segment, a first end of the second outer layer permanent magnet groove segment being disposed to extend toward the rotating shaft hole and being disposed opposite to the first end of the first outer layer permanent magnet groove segment to form a V-shaped structure, a second end of the second outer layer permanent magnet groove segment being disposed toward the outer edge of the rotor body, and the first outer layer permanent magnet groove segment and the second outer layer permanent magnet groove segment being located on two sides of the direct axis;
• wherein the rotor structure further comprises an outer layer permanent magnet and an inner layer permanent magnet, the outer layer permanent magnet is disposed in the outer layer permanent magnet groove, and the inner layer permanent magnet is disposed in the inner layer permanent magnet groove;
• and
• the outer layer permanent magnet groove further comprises:
• a first deflection groove, a first end of the first deflection groove being connected to the second end of the first outer layer permanent magnet groove segment, a second end of the first deflection groove being disposed to extend toward the outer edge of the rotor body, a geometric center line in a length direction of the first deflection groove and a geometric center line in a length direction of the first outer layer permanent magnet groove segment forming a third angle, and a distance between the geometric center line in the length direction of the first deflection groove and the quadrature-axis gradually decreasing outward in the radial direction of the rotor body;
• wherein a distance between a midpoint of a side wall, near the outer edge of the rotor body, of the second end of the first deflection groove and an intersection point of a geometric center line of the first outer layer permanent magnet groove segment and the outer edge of the rotor body is A, a width of an end of the second end of the first outer layer permanent magnet groove segment is M, and 0.6M≤A.

An electric vehicle, comprising a rotor structure, the rotor structure comprising a rotor body, wherein a permanent magnet groove group is disposed on the rotor body, the permanent magnet groove group comprises an outer layer permanent magnet groove and an inner layer permanent magnet groove, a magnetic conduction channel is formed between the outer layer permanent magnet groove and the inner layer permanent magnet groove which are adjacent, at least one end of the magnetic conduction channel is formed as a deflection segment, and a distance from the deflection segment to a quadrature-axis of the rotor body gradually decreases outward in a radial direction, so that the at least one end of the magnetic conduction channel tends to approach the quadrature-axis;

• wherein the magnetic conduction channel comprises a first component segment, a second component segment and a third component segment connected in sequence, a first end of the first component segment is disposed toward a rotating shaft hole of the rotor body, a second end of the first component segment is disposed to extend toward an outer edge of the rotor body, a first end of the third component segment is disposed toward the rotating shaft hole, a second end of the third component segment is disposed to extend toward the outer edge of the rotor body, the first component segment and the third component segment are located on two sides of a direct axis, a distance from the first component segment to the direct axis gradually increases outward in a radial direction of the rotor body, and the deflection segment is formed at the second end of the first component segment and/or the second end of the third component segment;
• the outer layer permanent magnet groove comprises:
• a first outer layer permanent magnet groove segment, a first end of the first outer layer permanent magnet groove segment being disposed to extend toward the rotating shaft hole, and a second end of the first outer layer permanent magnet groove segment being disposed toward the outer edge of the rotor body;
• and a second outer layer permanent magnet groove segment, a first end of the second outer layer permanent magnet groove segment being disposed to extend toward the rotating shaft hole and being disposed opposite to the first end of the first outer layer permanent magnet groove segment to form a V-shaped structure, a second end of the second outer layer permanent magnet groove segment being disposed toward the outer edge of the rotor body, and the first outer layer permanent magnet groove segment and the second outer layer permanent magnet groove segment being located on two sides of the direct axis;
• wherein the rotor structure further comprises an outer layer permanent magnet and an inner layer permanent magnet, the outer layer permanent magnet is disposed in the outer layer permanent magnet groove, and the inner layer permanent magnet is disposed in the inner layer permanent magnet groove;
• and
• the outer layer permanent magnet groove further comprises:
• a first deflection groove, a first end of the first deflection groove being connected to the second end of the first outer layer permanent magnet groove segment, a second end of the first deflection groove being disposed to extend toward the outer edge of the rotor body, a geometric center line in a length direction of the first deflection groove and a geometric center line in a length direction of the first outer layer permanent magnet groove segment forming a third angle, and a distance between the geometric center line in the length direction of the first deflection groove and the quadrature-axis gradually decreasing outward in the radial direction of the rotor body;
• wherein a distance between a midpoint of a side wall, near the outer edge of the rotor body, of the second end of the first deflection groove and an intersection point of a geometric center line of the first outer layer permanent magnet groove segment and the outer edge of the rotor body is A, a width of an end of the second end of the first outer layer permanent magnet groove segment is M, and 0.6M≤A.