CN217769650U

CN217769650U - Permanent magnet synchronous motor segmented skewed pole rotor structure

Info

Publication number: CN217769650U
Application number: CN202122619248.4U
Authority: CN
Inventors: 佟宁泽; 陈勇; 郭海伦; 党成涛
Original assignee: Automation Research and Design Institute of Metallurgical Industry
Current assignee: Automation Research and Design Institute of Metallurgical Industry
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-11-08
Anticipated expiration: 2031-10-28

Abstract

A permanent magnet synchronous motor segmented skewed pole rotor structure belongs to the technical field of industrial automatic control technology and new energy automobile driving motors. The multi-key-groove rotor comprises a multi-key-groove main shaft (1), a flat key (2), a first segmented rotor iron core (3) and a second segmented rotor iron core (4). The first segmented rotor core (3) and the second segmented rotor core (4) are identical in structure, the same punching sheet is used, and the front side and the back side are exchanged only during installation. The rotor is divided into oblique poles through the cooperation of a first eccentric key slot (5) and a second eccentric key slot (6) on a first sectional rotor core (3) and a second sectional rotor core (4) with a first key slot (7), a second key slot (8) and a third key slot (9) on a multi-key-slot main shaft (1). The segmented rotor core structure has the advantages that the segmented rotor core structure is completely consistent on the premise of realizing rotor slant poles, the mold cost can be effectively reduced, and large-scale automatic production is easy to realize.

Description

Permanent magnet synchronous motor segmented skewed pole rotor structure

Technical Field

The utility model belongs to the technical field of industry automatic control technique and new energy automobile driving motor, in particular to PMSM segmentation oblique polar rotor structure is applicable to all kinds of inner rotor PMSM.

Background

Due to the development of motor control technology and the application of motors in the field of new energy automobiles, more and more driving motors are widely used. Aiming at some occasions with higher precision requirements, the output torque fluctuation of the motor is required to be small, the cogging torque is required to be low, and the vibration noise of the motor is also required to be correspondingly higher, so that the motor is required to be optimally designed. In order to achieve the above optimized indexes and weaken the influence caused by harmonic waves, the permanent magnet synchronous motor usually uses a stator skewed slot or a rotor skewed pole mode, so that the output torque fluctuation and the cogging torque of the motor can be effectively weakened, and the vibration and the noise of the motor can be inhibited. The current method is to segment the rotors, each section of the rotors is provided with key slots with different positioning positions, and each section of the rotors is matched with the main shaft through a flat key, so that each section of the rotors is different, the rotors with the same type correspond to various different rotor sheets, great difficulty is brought to production, and in addition, the mold cost of the motor is increased.

Disclosure of Invention

The utility model aims to provide a permanent magnet synchronous motor subsection skewed pole rotor structure which is easy to produce; the rotor core only keeps one structural form while satisfying the rotor core segmentation.

The utility model discloses well rotor core adopts the mode of keyway with the location of main shaft, and the mode that the keyway cooperation used the rotor core of multiple difference in the past is different, the utility model discloses well segmentation rotor core is unanimous completely, through the distribution of keyway on the adjustment main shaft to and the open position of keyway forms oblique utmost point on the segmentation rotor core. The rotor core structure and the multi-keyway main shaft matched structure are used for realizing the rotor segmented skewed pole structure of the permanent magnet synchronous motor, so that the design of the rotor core of the motor keeps a structure, the cost of a die is reduced, the assembly process of the rotor is simplified, and the production efficiency of the motor with a related structure is greatly improved.

The utility model discloses a many keyway main shaft 1, flat key 2, first segmentation rotor core 3 and second segmentation rotor core 4, wherein, first

segmentation rotor core

3 and 4 structural symmetries of second segmentation rotor core use same rotor punching, and the front reverse side is exchanged when only installing, and first segmentation rotor core 3 and second segmentation rotor core 4 form the oblique utmost point PMSM rotor of segmentation through flat key 2 and many keyway main shaft 1 cooperation installation. The structure of the present invention is further described below:

1 asymmetric keyway rotor core

The inner hole of the first sectional rotor core 3 connected with the main shaft is provided with a first eccentric key groove 5 and a second eccentric key groove 6, the first eccentric key groove 5 and the second eccentric key groove 6 are symmetrically distributed on two sides of the transverse shaft, but are on the same side of the longitudinal shaft, so that an eccentric structure is formed, and the eccentric angles are the same.

The second segmented rotor core 4 and the first segmented rotor core 3 are completely symmetrical in structure, and are processed by using the same rotor punching die, so that the die cost is greatly reduced, and the front side and the back side are exchanged only during assembly to form symmetrical distribution. As can be seen from fig. 2 and 3, first eccentric key slot 5 and second eccentric key slot 6 are both on the left side of the longitudinal axis for first segmented rotor core 3, and first eccentric key slot 5 and second eccentric key slot 6 are both on the right side of the longitudinal axis for second segmented rotor core 4.

2 multi-keyway spindle

The multi-key-groove spindle 1 is provided with a plurality of key grooves for matching with a rotor core, and the rotor core is matched with different positions of the first groove 7, the second key groove 8 and the third key groove 9 to realize rotor slant poles. The lengths of the key grooves are completely consistent, the number of the key grooves is one less than the number of the rotor core sections, and the used flat keys 2 are also of the same type. First keyway 7, second keyway 8 and third keyway 9 are staggered and positioned relative to the axis of multi-keyway spindle 1 as shown in the schematic views of fig. 6, 7, 8 and 9. The front half section of the first key groove 7 is matched with the first segmented rotor core 3, and the rear half section of the first key groove 7 is matched with the second segmented rotor core 4; the front half section of the second key groove 8 is matched with the second sectional rotor core 4, and the rear half section of the second key groove 8 is matched with the first sectional rotor core 3; the first half section of the third key slot 9 is matched with the first sectional rotor core 3, and the second half section of the third key slot 9 is matched with the second sectional rotor core 4. The rotor slant poles are realized by staggered matching assembly.

The utility model has the advantages of, under the prerequisite that realizes the rotor oblique utmost point, the segmentation rotor core structure is unanimous completely, can effectively reduce the mould cost, easily extensive automated production.

Drawings

Fig. 1 is an assembly view of a rotor of a segmented skewed pole permanent magnet synchronous motor.

Fig. 2 is a schematic view of segmented rotor core 3.

Fig. 3 is a schematic view of segmented rotor core 4.

Figure 4 is an isometric view of a multi-keyway spindle.

FIG. 5 is a side view of a multi-keyway spindle.

Fig. 6 isbase:Sub>A view from directionbase:Sub>A-base:Sub>A of fig. 5.

Fig. 7 is a view from direction B-B of fig. 5.

Fig. 8 is a view from direction C-C of fig. 5.

Fig. 9 is a view from direction D-D of fig. 5.

Fig. 10 is a schematic view of a rotor of a segmented skewed pole permanent magnet synchronous motor.

Fig. 11 is a view from direction E-E of fig. 10.

Fig. 12 is a view from direction F-F of fig. 10.

Fig. 13 is a view from direction G-G of fig. 10.

Fig. 14 is a view from direction H-H of fig. 10.

In the figure, a multi-key-groove main shaft 1, a flat key 2, a first segmented rotor core 3, a second segmented rotor core 4, a first eccentric key groove 5, a second eccentric key groove 6, a first key groove 7, a second key groove 8 and a third key groove 9 are shown.

Detailed Description

The utility model aims at providing a permanent magnet synchronous machine rotor segmentation oblique utmost point scheme, it is different with the method that the oblique utmost point was realized to the multiple rotor core of single keyway cooperation of traditional use, adopt the form of the many keyway main shaft of single rotor core cooperation to realize the rotor oblique utmost point in this patent.

The utility model discloses in the rotor includes many keyway main shaft 1, parallel key 2, first segmentation rotor core 3 and second segmentation rotor core 4. Wherein multi-keyway spindle 1 is connected to first segmented rotor core 3 and second segmented rotor core 4 by flat key 2. The first segmented rotor core 3 and the second segmented rotor core 4 are symmetrical in structure, the same type of rotor punching sheet is used, and only installation modes are different. A first eccentric key groove 5 and a second eccentric key groove 6 are formed in the iron core and matched with a first key groove 7, a second key groove 8 and a third key groove 9 in the multi-key-groove main shaft 1 to form a complete segmented oblique-pole permanent magnet synchronous motor rotor.

In order to realize the structure, the first segmented rotor core 3 and the second segmented rotor core 4 are structurally symmetrical, the same rotor punching sheet structure is used, and the front surface and the back surface of the first segmented rotor core 3 are exchanged to form the second segmented rotor core 4 only when the rotor punching sheet structure is used. The first segmented rotor core 3 is provided with a first eccentric slot 5 and a second eccentric key slot 6. The first eccentric key groove 5 and the second eccentric key groove 6 are symmetrically distributed on two sides of the transverse shaft, but are on the same side of the longitudinal shaft, so that an eccentric structure is formed, and the eccentric angles are the same. The control of the oblique pole angle is realized through the control of the eccentric angle.

The multi-keyway main shaft 1 is alternately provided with a plurality of keyways, namely a first keyway 7, a second keyway 8 and a third keyway 9. The key slot length is about two segmented rotor cores and the single flat key 2 is identical in length. The number of the key slots is one less than that of the segmented rotor cores, and two segmented rotor cores are fixed by each flat key 2.

The assembly of the segmented skewed-pole rotor is schematically shown in fig. 10, and the eccentric key slots on the segmented rotor core are matched with the key slots on the multi-key-slot spindle 1 through flat keys. The first eccentric key slot 5 on the first section of the first segmented rotor core 3 is overlapped with the first key slot 7 on the multi-key-slot main shaft 1 in a sequence from left to right; a first eccentric key slot 5 on the second section of the second segmented rotor core 4 is superposed with a first key slot 7 on the multi-key-slot main shaft 1, and a second eccentric key slot 6 on the second segmented rotor core 4 is superposed with a second key slot 8 on the multi-key-slot main shaft 1; a first eccentric key groove 5 on the third section of the first segmented rotor core 3 is superposed with a third key groove 9 on the multi-key-groove main shaft 1, and a second eccentric key groove 6 on the first segmented rotor core 3 is superposed with a second key groove 8 on the multi-key-groove main shaft 1; the first eccentric key slot 5 on the fourth section of the second segmented rotor core 4 coincides with the third key slot 9 on the multi-key-slot spindle 1. The first segmented rotor core 3 and the fourth segmented rotor core 4 are matched with the multi-key-groove spindle 1 only through one flat key 2, and the second segmented rotor core 4 and the third segmented rotor core 3 are matched with the multi-key-groove spindle 1 through two flat keys 2. By the above matching manner, the rotor slant pole effect in fig. 1 is achieved.

Claims

1. A permanent magnet synchronous motor segmented skewed pole rotor structure is characterized by comprising a multi-key-groove main shaft (1), a flat key (2), a first segmented rotor core (3) and a second segmented rotor core (4), wherein the first segmented rotor core (3) and the second segmented rotor core (4) are installed with the multi-key-groove main shaft (1) in a matched mode through the flat key (2) to form a segmented skewed pole permanent magnet synchronous motor rotor;

the first segmented rotor core (3) and the second segmented rotor core (4) are completely symmetrical in structure, the same rotor punching sheets are used, and the front side and the back side are interchanged only during assembly;

an inner hole of the first segmented rotor core (3) connected with the main shaft is provided with a first eccentric key groove (5) and a second eccentric key groove (6), the first eccentric key groove (5) and the second eccentric key groove (6) are symmetrically distributed on two sides of the transverse shaft, but are on the same side of the longitudinal shaft to form an eccentric structure, and the eccentric angles are the same;

a first key groove (7), a second key groove (8) and a third key groove (9) are formed in the multi-key-groove main shaft (1) and are arranged in a staggered mode.

2. The segmented skewed pole rotor structure of claim 1, wherein the number of keyways on the multi-keyway spindle (1) is the number of rotor core segments minus 1.

3. The segmented skewed pole rotor structure of claim 1, wherein the first eccentric key slot (5) of the first segmented rotor core (3) coincides with the first key slot (7) of the multi-key-slot spindle (1); a first eccentric key groove (5) on a second section of second sectional rotor iron core (4) is superposed with a first key groove (7) on the multi-key-groove main shaft (1), and a second eccentric key groove (6) on the second sectional rotor iron core (4) is superposed with a second key groove (8) on the multi-key-groove main shaft (1); a first eccentric key groove (5) on the third section of the first segmented rotor core (3) is superposed with a third key groove (9) on the multi-key-groove main shaft (1), and a second eccentric key groove (6) on the first segmented rotor core (3) is superposed with a second key groove (8) on the multi-key-groove main shaft (1); and a first eccentric key groove (5) on the fourth section of second segmented rotor core (4) is superposed with a third key groove (9) on the multi-key-groove main shaft (1).

4. The segmented skewed pole rotor structure of claim 1, wherein the first segmented rotor core (3) and the fourth segmented rotor core (4) are engaged with the multi-key-slot spindle (1) only through one flat key (2), and the second segmented rotor core (4) and the third segmented rotor core (3) are engaged with the multi-key-slot spindle (1) through two flat keys (2).