Permanent magnet synchronous reluctance motor rotor punching sheet for traction motor

Abstract

The utility model discloses a permanent magnet synchronous reluctance motor rotor punching sheet for a traction motor, and belongs to the technical field of motor rotor punching sheets. The rotor punching sheet comprises a punching sheet body, a rotating shaft hole, a screw rod hole and a key groove. The punching sheet body is provided with a plurality of magnetic pole structures, each magnetic pole structure comprises a first magnetic steel groove, a second magnetic steel groove, a third magnetic steel groove and a plurality of magnetic isolation grooves, the magnetic pole structures and the screw rod holes are distributed along the circumference of the punching sheet body, and the magnetic isolation grooves are formed in the two sides of the first magnetic steel groove, the two sides of the second magnetic steel groove and the two sides of the third magnetic steel groove respectively. The rotating shaft hole is arranged in the center of the punching sheet body, and the key groove is connected with the rotating shaft hole. According to the utility model, the reluctance torque, the power and the torque density of the motor are improved, the requirements of the magnetic flux density, the stress intensity and the light weight of the rotor punching sheet are fully considered, and the effect of balanced matching is achieved. Meanwhile, according to the design, the ferrite permanent magnet material which is low in price and stable in performance is used, so that the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor rotor punching sheets, and in particular relates to a permanent magnet synchronous reluctance motor rotor punching sheet for a traction motor. Background Art

[0002] The rotor lamination is an extremely important component in a synchronous reluctance motor; the strength and quality of the rotor lamination directly affect the motor quality, motor operating status, motor life and motor performance. However, since permanent magnets are installed in the rotor laminations of a permanent magnet synchronous reluctance motor, compared with other reluctance motors, the laminations have large stress distribution and high mechanical strength, which directly affects the motor's operating status and final product performance. The existing rotor lamination structure has a poor effect on the performance of the motor, is not conducive to the motor's operating status, and has a serious impact on the motor's life and quality. Utility Model Content

[0003] Technical problem solved: In view of the problems faced by current permanent magnet synchronous reluctance motor rotor punchings in adapting motor performance and operating status, the utility model provides a permanent magnet synchronous reluctance motor rotor punching for traction motors. Through calculation and improvement of its structure, the rotor punching can not only effectively meet the various requirements of motor performance, but also provide strong support for the motor, ensuring that it is in the best operating state, thereby greatly improving the overall performance and reliability of the motor.

[0004] Technical solution: The utility model provides a permanent magnet synchronous reluctance motor rotor punching sheet for traction motor, comprising a punching sheet body, a shaft hole, a screw hole, and a keyway; the punching sheet body is provided with multiple groups of magnetic pole structures, each group of the magnetic pole structures comprises a first magnetic steel slot, a second magnetic steel slot, a third magnetic steel slot and multiple groups of magnetic isolation slots, the magnetic pole structures and the screw holes are respectively distributed along the circumference of the punching sheet body, the magnetic isolation slots are respectively arranged on both sides of the first magnetic steel slot, the second magnetic steel slot, and the third magnetic steel slot, the shaft hole is arranged at the center of the punching sheet body, and the keyway is connected to the shaft hole.

[0005] Furthermore, the first magnetic steel groove, the second magnetic steel groove, and the third magnetic steel groove are all in the shape of a letter "I", and are arranged in sequence along the outer circumference of the punch body and in parallel with each other.

[0006] Furthermore, the widths of the first magnetic steel slot, the second magnetic steel slot, and the third magnetic steel slot are equal, and their lengths increase in sequence.

[0007] Furthermore, first magnetic isolation grooves are symmetrically provided on both sides of the first magnetic steel groove; second magnetic isolation grooves are symmetrically provided on both sides of the second magnetic steel groove; and third magnetic isolation grooves are symmetrically provided on both sides of the third magnetic steel groove.

[0008] Furthermore, a partition plate is provided at the connection between the first magnetic steel groove and the first magnetic isolation groove; a partition plate is provided at the connection between the second magnetic steel groove and the second magnetic isolation groove; and a partition plate is provided at the connection between the third magnetic steel groove and the third magnetic isolation groove.

[0009] Furthermore, a first magnetic isolation bridge, a second magnetic isolation bridge, and a third magnetic isolation bridge are respectively provided between the first magnetic isolation groove, the second magnetic isolation groove, and the third magnetic isolation groove and the rotor punching body, and a fourth magnetic isolation bridge is provided between two adjacent magnetic isolation grooves.

[0010] Furthermore, the keyway is composed of a first straight line segment, a second straight line segment, a third curved line segment and a fourth straight line segment connected in sequence; one end of the first straight line segment and the fourth straight line segment are respectively connected to the shaft hole.

[0011] Furthermore, the outer diameter of the punch body is 713 mm; the outer diameter of the shaft hole is 500 mm; and the diameter of the screw hole is 11 mm.

[0012] Furthermore, the number of the magnetic pole structures is the same as the number of motor poles.

[0013] Beneficial effects: The utility model provides a permanent magnet synchronous reluctance motor rotor punching sheet for a traction motor, which has the following beneficial effects:

[0014] (1) The rotor punching of the utility model has a higher magnetic resistance torque, and the mechanical strength of the rotor punching is increased by setting a proper amount of magnetic isolation bridges.

[0015] (2) The rotor punchings of the utility model adopt ferrite permanent magnets, which are low in price, making the performance of the reluctance motor more stable and reducing the cost of the motor.

[0016] (3) The rotor lamination yoke can fully and evenly match the requirements of the yoke magnetic flux density, rotor lamination lightweight and strength.

[0017] (4) The rotor punching of the utility model has lower rotational pulsation when in use, which improves the smoothness of torque output, reduces harmonic content, and has a high power factor.

[0018] (5) The keyway is set as an irregular groove, and a small semicircular hole is provided in the upper right corner of the groove. The processing is one-time forming to ensure the cost; and the keyway is used as a positioning hole to achieve precise positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the rotor punching sheet of the motor of the utility model;

[0020] Figure 2 The magnetic pole structure of the motor rotor punching sheet of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 3The magnetic pole structure of the motor rotor punching sheet of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 4 It is a schematic diagram of the keyway of the motor rotor punching sheet of the utility model.

[0023] Reference numerals:

[0024] 1. Punch body; 2. Shaft hole; 3. Screw hole; 4. Keyway;

[0025] 21. first magnetic steel slot; 22. second magnetic steel slot; 23. third magnetic steel slot; 24. first magnetic isolation slot; 25. second magnetic isolation slot; 26. third magnetic isolation slot;

[0026] 31. The first magnetic isolation bridge; 32. The second magnetic isolation bridge; 33. The third magnetic isolation bridge; 34. The fourth magnetic isolation bridge; 35. The partition;

[0027] 41. First straight line segment; 42. Second straight line segment; 43. Third curved line segment; 44. Fourth straight line segment. DETAILED DESCRIPTION

[0028] The following embodiments are combined with the accompanying drawings to further illustrate the permanent magnet synchronous reluctance motor rotor punching for the traction motor of the utility model.

[0029] like Figures 1 to 4 As shown, the utility model provides a permanent magnet synchronous motor rotor punching sheet for traction motor, comprising a punching sheet body 1, a shaft hole 2, a screw hole 3, and a keyway 4; the punching sheet body 1 is provided with a plurality of groups of magnetic pole structures, each group of the magnetic pole structures comprises a first magnetic steel groove 21, a second magnetic steel groove 22, a third magnetic steel groove 23 and a plurality of groups of magnetic isolation grooves, the magnetic pole structure and the screw hole 3 are respectively distributed along the circumference of the punching sheet body 1, the magnetic isolation grooves are respectively arranged on both sides of the first magnetic steel groove 21, the second magnetic steel groove 22, and the third magnetic steel groove 23, these magnetic pole structures ensure the uniformity and high efficiency of the magnetic field distribution; the shaft hole 2 is arranged at the center of the punching sheet body 1, the screw holes 3 are eight, evenly distributed on the outside of the shaft hole and between the magnetic pole structure, the keyway 4 is connected to the shaft hole 2; the keyway 4 and the screw hole 3 are used for positioning, which is convenient for installation.

[0030] Specifically, the magnetic steel is installed in the magnetic pole structure. The magnetic steel is a ferrite permanent magnet material with low price but stable performance, which greatly reduces the production cost.

[0031] The first magnetic steel slot 21 , the second magnetic steel slot 22 , and the third magnetic steel slot 23 are all in the shape of a straight line, and are arranged in sequence along the outer circumference of the punch body 1 toward the center and are parallel to each other, forming an effective magnetic circuit.

[0032] The first magnetic steel slot 21 , the second magnetic steel slot 22 , and the third magnetic steel slot 23 have the same width, and their lengths increase in sequence.

[0033] First magnetic isolation grooves 24 are symmetrically provided on both sides of the first magnetic steel groove 21 ; second magnetic isolation grooves 25 are symmetrically provided on both sides of the second magnetic steel groove 22 ; and third magnetic isolation grooves 26 are symmetrically provided on both sides of the third magnetic steel groove 23 .

[0034] A partition plate 35 is provided at the connection between the first magnetic steel groove 21 and the first magnetic isolation groove 24 ; a partition plate 35 is provided at the connection between the second magnetic steel groove 22 and the second magnetic isolation groove 25 ; a partition plate 35 is provided at the connection between the third magnetic steel groove 23 and the third magnetic isolation groove 26 .

[0035] A first magnetic isolation bridge 31 , a second magnetic isolation bridge 32 , and a third magnetic isolation bridge 33 are respectively disposed between the first magnetic isolation groove 24 , the second magnetic isolation groove 25 , and the third magnetic isolation groove 26 and the rotor sheet body 1 , and a fourth magnetic isolation bridge 34 is disposed between two adjacent magnetic isolation grooves.

[0036] The keyway 4 is composed of a first straight segment 41 , a second straight segment 42 , a third curved segment 43 and a fourth straight segment 44 connected in sequence; one end of the first straight segment 41 and the fourth straight segment 44 are connected to the shaft hole 2 respectively.

[0037] The keyway 4 is an irregular groove, which is formed by one-step processing to ensure cost. It is composed of a first straight segment 41, a second straight segment 42, a third curved segment 43 and a fourth straight segment 44 connected in sequence; one end of the first straight segment 41 and the fourth straight segment 44 are respectively connected to the shaft hole 2; the third curved segment 43 is semicircular, and its radius is 2.5 mm.

[0038] The outer diameter of the punch body 1 is 713 mm; the outer diameter of the shaft hole 2 is 500 mm; and the diameter of the screw hole 3 is 11 mm.

[0039] The number of the magnetic pole structures is the same as the number of motor poles.

[0040] In summary, the rotor punching of the utility model has a higher magnetic resistance torque, and the mechanical strength of the rotor punching is increased by setting an appropriate amount of magnetic isolation bridges. It has lower rotor pulsation when in use, improves the smoothness of torque output, has less harmonic content, and has a high power factor.

[0041] The above is a detailed introduction to the embodiments of the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A permanent magnet synchronous reluctance motor rotor punching for a traction motor, characterized in that: The invention comprises a punch body (1), a rotating shaft hole (2), a screw hole (3) and a keyway (4); the punch body (1) is provided with a plurality of groups of magnetic pole structures, each group of the magnetic pole structures comprises a first magnetic steel groove (21), a second magnetic steel groove (22), a third magnetic steel groove (23) and a plurality of groups of magnetic isolation grooves; the magnetic pole structures and the screw hole (3) are respectively distributed along the circumference of the punch body (1); the magnetic isolation grooves are respectively arranged on both sides of the first magnetic steel groove (21), the second magnetic steel groove (22) and the third magnetic steel groove (23); the rotating shaft hole (2) is arranged at the center of the punch body (1); and the keyway (4) is connected to the rotating shaft hole (2).

2. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 1 is characterized in that: The first magnetic steel groove (21), the second magnetic steel groove (22), and the third magnetic steel groove (23) are all in the shape of a letter "I", and are arranged in sequence along the outer circumference of the punch body (1) in a central direction and are parallel to each other.

3. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 2 is characterized in that: The first magnetic steel slot (21), the second magnetic steel slot (22), and the third magnetic steel slot (23) have equal widths, and their lengths increase in sequence.

4. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 1, characterized in that: First magnetic isolation grooves (24) are symmetrically provided on both sides of the first magnetic steel groove (21); second magnetic isolation grooves (25) are symmetrically provided on both sides of the second magnetic steel groove (22); and third magnetic isolation grooves (26) are symmetrically provided on both sides of the third magnetic steel groove (23).

5. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 4, characterized in that: A partition plate (35) is provided at the connection between the first magnetic steel slot (21) and the first magnetic isolation slot (24); a partition plate (35) is provided at the connection between the second magnetic steel slot (22) and the second magnetic isolation slot (25); and a partition plate (35) is provided at the connection between the third magnetic steel slot (23) and the third magnetic isolation slot (26).

6. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 5, characterized in that: A first magnetic isolation bridge (31), a second magnetic isolation bridge (32), and a third magnetic isolation bridge (33) are respectively provided between the first magnetic isolation groove (24), the second magnetic isolation groove (25), and the third magnetic isolation groove (26) and the rotor sheet body (1), and a fourth magnetic isolation bridge (34) is provided between two adjacent magnetic isolation grooves.

7. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 1, characterized in that: The keyway (4) is composed of a first straight segment (41), a second straight segment (42), a third curved segment (43) and a fourth straight segment (44) connected in sequence; one end of the first straight segment (41) and the fourth straight segment (44) are respectively connected to the shaft hole (2).

8. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 1, characterized in that: The outer diameter of the punch body (1) is 713 mm; the outer diameter of the shaft hole (2) is 500 mm; and the diameter of the screw hole (3) is 11 mm.

9. The permanent magnet synchronous reluctance motor rotor punching sheet for traction motor according to claim 1, characterized in that: The number of the magnetic pole structures is the same as the number of motor poles.

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