Synchronous reluctance motor rotor and synchronous reluctance motor
A synchronous reluctance motor rotor, including: a rotor core, wherein the rotor core includes a plurality of magnetic-flux barrier groups, and each magnetic-flux barrier group includes at least two magnetic-flux barriers provided at an interval in a radial direction of the rotor core; the rotor core further includes magnetic bridges, the magnetic bridges are disposed within the magnetic-flux barriers and connect inner surfaces of the magnetic-flux barriers with outer surfaces of the magnetic-flux barriers, and a distance between the magnetic bridges and an outer edge of the rotor core is no less than a predetermined distance.
1. A synchronous reluctance motor rotor, comprising a rotor core, wherein the rotor core comprises a plurality of magnetic-flux barrier groups, and each magnetic-flux barrier group comprises at least two magnetic-flux barriers provided at an interval in a radial direction of the rotor core; the rotor core further comprises magnetic bridges, the magnetic bridges are disposed within the magnetic-flux barriers and connect inner surfaces of the magnetic-flux barriers with outer surfaces of the magnetic-flux barriers, and a distance between the magnetic bridges and an outer edge of the rotor core is no less than a predetermined distance,
wherein an angle θ between a Q-axis of the magnetic-flux barrier group and each magnetic bridge of the magnetic bridges thereof is: (180-90/p)≤θ≤(180-90/p+δ), in degrees, wherein p represents a number of pole pairs of the motor, and δ is 20° .
2. The synchronous reluctance motor rotor according to claim 1 , wherein each of the magnetic-flux barriers comprises arm slots and a beam slot, the arm slots extend in a direction parallel to a D-axis, the beam slot extends in a direction perpendicular to a Q-axis, and the arm slots communicate with the beam slot at two ends of the beam slot and are located on a radial outer side of the beam slot.
3. The synchronous reluctance motor rotor according to claim 2 , wherein an arc transition is formed between the arm slots and the beam slot.
4. The synchronous reluctance motor rotor according to claim 1 , wherein each of the magnetic-flux barriers comprises arm slots disposed on two sides, the arm slots extend in a direction parallel to a D-axis, and the arm slots are connected through an arc slot.
5. The synchronous reluctance motor rotor according to claim 2 , wherein each magnetic bridge of the magnetic bridges is arranged in the arm slot, and a distance H between the magnetic bridge and the outer edge of the rotor core satisfies: 0.4L≥H≥0.2L, wherein L is a length of the arm slot where the magnetic bridge is located.
6. The synchronous reluctance motor rotor according to claim 5 , wherein in each magnetic-flux barrier group, the distances H between the magnetic bridges of magnetic-flux barriers and the outer edge of the rotor core gradually decrease in a direction from the D-axis to the Q-axis.
7. The synchronous reluctance motor rotor according to claim 1 , wherein in a rotating direction of the motor, each of the magnetic-flux barriers comprises a front magnetic bridge and a rear magnetic bridge, the rear magnetic bridge located downstream of the front magnetic bridge along the rotating direction, and a width W1 of the front magnetic bridge is smaller than a width W2 of the rear magnetic bridge.
8. The synchronous reluctance motor rotor according to claim 1 , wherein in a rotating direction of the motor, each of the magnetic-flux barriers comprises a front magnetic bridge and a rear magnetic bridge, the rear magnetic bridge located downstream of the front magnetic bridge along the rotating direction, and both a width W1 of the front magnetic bridge and a width W2 of the rear magnetic bridge are 0.8-1.2 mm.
9. The synchronous reluctance motor rotor according to claim 1 , wherein the rotor core comprises a plurality of rotor plates made of a magnetic conductive material.
10. The synchronous reluctance motor rotor according to claim 9 , wherein the plurality of rotor plates are connected by rivets.
11. The synchronous reluctance motor rotor according to claim 1 , wherein the magnetic-flux barriers extend to the outer edge of the rotor core and form openings at the outer edge of the rotor core.
12. A synchronous reluctance motor, comprising the synchronous reluctance motor rotor according to claim 1 .
13. The synchronous reluctance motor rotor according to claim 4 , wherein each magnetic bridge of the magnetic bridges is arranged in the arm slot, and a distance H between the magnetic bridge and the outer edge of the rotor core satisfies: 0.4L≥H≥0.2L, wherein L is a length of the arm slot where the magnetic bridge is located.
14. The synchronous reluctance motor rotor according to claim 13 , wherein in each magnetic-flux barrier group, the distances H between the magnetic bridges of magnetic-flux barriers and the outer edge of the rotor core gradually decrease in a direction from the D-axis to the Q-axis.