Synchronous reluctance motor rotor and synchronous reluctance motor

Patent metadata

Field	Value
Publication number	US-11075553-B2
Application number	US-201716072770-A
Country	US
Kind code	B2
Filing date	Jan 23, 2017
Priority date	Jan 26, 2016
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

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.

First claim

The invention claimed is:

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.

Assignees

• Gree Green Refrigeration Tech Ct Co Ltd Zhuhai

Inventors

• Tong Tong
• Hu Yusheng
• Chen Bin
• Lu Suhua

Classifications

• H02K1/28

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• H02K1/22 Primary

  Rotating parts of the magnetic circuit · CPC title

• H02K1/246 Primary

  Variable reluctance rotors · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title