CN215267804U

CN215267804U - Rotary motor punching sheet and rotor

Info

Publication number: CN215267804U
Application number: CN202120636291.9U
Authority: CN
Inventors: 刘蕾; 张仁忠; 范佳伦; 范坤
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-12-21
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a rotary electric machine punching sheet and rotor, the punching sheet comprises a punching sheet body, a plurality of magnetic poles which are symmetrically distributed along the circumferential direction are arranged on the punching sheet body, and each magnetic pole comprises a pair of magnetic steel grooves; the pair of magnetic steel grooves are symmetrically distributed about the axis center line of the magnetic pole D, and the mutual distance between the pair of magnetic steel grooves gradually widens towards the outer circumference direction of the punching sheet along the axis center line of the magnetic pole D; a through hole which is symmetrical about the central line of the magnetic pole D shaft is arranged between the two magnetic steel grooves; a lightening hole is arranged between the area between every two adjacent magnetic poles and the inner circle of the punching sheet; positioning holes are formed between adjacent lightening holes; the punching sheet body is also provided with an inner circle of riveting points and an outer circle of riveting points; the outer ring riveting point is positioned between adjacent magnetic poles, and the inner ring riveting point is positioned between the lightening hole and the inner circle of the punching sheet. The utility model discloses from the rotor towards piece magnetic circuit design, adopt the magnetic circuit structure of V-arrangement roughly, obtain high salient pole ratio through preferred V clamp angle, realize permanent-magnet machine's high performance.

Description

Rotary motor punching sheet and rotor

Technical Field

The utility model relates to a motor, in particular to rotating electrical machines towards piece and rotor.

Background

At present, new energy automobile driving motors develop towards high speed and high power density, in order to realize high speed, magnetic bridge structures are added on two sides of magnetic steel of a traditional built-in permanent magnet motor and used for improving the strength of a rotor, and the higher the rotating speed, the larger the width of the magnetic bridge is.

In the existing scheme, the performance of the motor can be seriously influenced by a method of adding magnetic bridges on two sides of magnetic steel to realize high rotating speed: the magnetic bridge is made of silicon steel sheets and is made of good magnetic materials, so that magnetic leakage of a permanent magnetic field is increased, the permanent magnetic torque is reduced, and the magnetic resistance of a D-axis magnetic circuit is reduced, and the magnetic resistance torque is reduced; the addition of the magnetic bridge inevitably brings the performance reduction of the motor, and the high power density is difficult to realize. Therefore, to achieve high rotational speeds and high power densities, innovative magnetic circuit designs are necessary.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the rotor punching sheet and the rotor adopt a V-shaped magnetic circuit structure, and high salient pole ratio is obtained through an optimal V-shaped included angle, so that high performance of the permanent magnet motor is realized.

The technical scheme of the utility model is that:

a rotary motor punching sheet comprises a punching sheet body, wherein a plurality of magnetic poles symmetrically distributed along the circumferential direction are arranged on the punching sheet body, and each magnetic pole comprises a pair of magnetic steel grooves;

the pair of magnetic steel grooves are symmetrically distributed about the axis center line of the magnetic pole D, and the mutual distance between the pair of magnetic steel grooves gradually widens towards the outer circumference direction of the punching sheet along the axis center line of the magnetic pole D; a through hole which is symmetrical about the central line of the magnetic pole D shaft is arranged between the two magnetic steel grooves;

first magnetic bridges are formed between the outer end parts of the pair of magnetic steel grooves and the outer circles of the punching sheets respectively; second magnetic bridges are formed between the inner end parts of the pair of magnetic steel grooves and the through hole respectively;

a lightening hole is arranged between the area between every two adjacent magnetic poles and the inner circle of the punching sheet; positioning holes are formed between adjacent lightening holes;

the punching sheet body is also provided with an inner circle of riveting points and an outer circle of riveting points; two circles of riveting points are uniformly distributed on the symmetry line of adjacent magnetic poles of the rotor punching sheet, the outer circle riveting point is positioned between the adjacent magnetic poles, and the inner circle riveting point is positioned between the lightening hole and the inner circle of the punching sheet.

Preferably, the included angle alpha 1 of the pair of magnetic steel grooves is 95-105 degrees; the magnetic steels are respectively assembled in the pair of magnetic steel grooves, and the polar arc angle beta 1 of the two magnetic steels is 30-31 degrees.

Preferably, the upper side and the lower side of the through hole are perpendicular to the central line of the D axis of the magnetic pole, the left side and the right side are parallel to the central line of the D axis, and the width of the side of the through hole is 7-8 mm.

Preferably, a connecting line between two points with the shortest distance from the pair of magnetic steel grooves to the center of the punching sheet is collinear with the lower side of the through hole, and a distance D6 between the connecting line between the two points with the shortest distance from the pair of magnetic steel grooves to the center of the punching sheet and the upper side of the through hole is 2-2.5 mm.

Preferably, the width of the first magnetic bridge is 1.4 mm-1.6 mm, and the width of the second magnetic bridge is 1.1 mm-1.2 mm.

Preferably, an extension line of a long side of the magnetic steel 3 of the magnetic steel slot is tangent to the inner end portion 102 of the magnetic steel slot.

Preferably, the lightening hole comprises five side edges, wherein the inner side edge is an arc line segment taking the center of the punching sheet as a circular point, and the distance D2 between the inner side edge and the inner circle of the punching sheet is 6.5mm to 7.5 mm; the two middle side edges are parallel to each other, and the distance D9 is 12.5 mm-13.5 mm; the two lateral sides of the outer side are parallel to the inner lateral sides of the magnetic steel grooves corresponding to the left magnetic pole and the right magnetic pole, and the distance D1 between the two lateral sides and the magnetic steel grooves is 6.5-7.5 mm; the distance D3 between the outermost point and the outer circle of the punching sheet is 15-16 mm; the distance D8 from the outermost point to the inner side edge is 18.5 mm-19.5 mm.

Preferably, the positioning holes are distributed among the lightening holes, two positioning holes are distributed among two lightening holes and between two lightening holes which are symmetrical about the center of the punching sheet, and one positioning hole is distributed among other lightening holes.

Preferably, the number of the magnetic poles is eight, and the number of the corresponding positioning holes is ten, wherein the first positioning hole and the sixth positioning hole, the second positioning hole and the seventh positioning hole, the third positioning hole and the eighth positioning hole 1108, the fourth positioning hole and the ninth positioning hole, and the fifth positioning hole and the tenth positioning hole are all spaced by 180 degrees; taking the center line of the D axis of the magnetic pole corresponding to the first positioning hole as a datum line, and respectively sequentially setting the included angles between the datum line and the connecting line from the circle center of the first positioning hole, the second positioning hole, the third positioning hole, the fourth positioning hole and the fifth positioning hole to the center of the punching sheet as theta 1: 0.5 ° to 1 °, θ 2: 41.5-42 °, θ 3: 84-84.5 °, θ 4: 94-94.5 °, θ 5: 136.5 to 137 degrees.

Preferably, the distance D5 between the outer ring riveting point and the outer circle of the punching sheet is 7.5-8.5 mm, and the distance D4 between the inner ring riveting point and the inner circle of the punching sheet is 3.5-4.5 mm.

The rotor of the rotating motor comprises a rotating shaft, a plurality of rotating motor punching sheets which are sleeved on the rotating shaft through the inner circle of the punching sheet, and a positioning screw, wherein the multi-section oblique pole of the rotor is realized through the matching of a positioning hole in a punching sheet body and the positioning screw.

The quantity of the multi-segment oblique poles of the rotor is six segments, the first segment is used as a reference, the anticlockwise direction is positive, and when the rotor is viewed from the sixth segment iron core to the first segment iron core, the rotating angles of the second segment iron core to the sixth segment relative to the adjacent previous segment iron core are sequentially 2.5 degrees, 1.25 degrees, 2.5 degrees and 2.5 degrees.

The utility model has the advantages that:

1. the utility model provides a rotor punching magnetic circuit design, which adopts a V-shaped magnetic circuit structure, obtains high salient pole ratio through an optimized V-shaped clamp angle, and realizes the high performance of a permanent magnet motor;

2. the through hole is additionally arranged between the V-shaped magnetic steel V-shaped corners, and the through hole can be filled with non-magnetic materials such as resin or air, so that the D-axis magnetic resistance is increased, but the Q-axis magnetic resistance is not influenced, therefore, the salient pole ratio of the motor is increased, and the performance of the motor is improved;

3. the utility model discloses a set up the lightening hole between circle and the magnet steel in the rotor punching, the lightening hole alleviates motor weight, has increased power density.

4. The utility model discloses a rotating electrical machines rotor through the cooperation towards locating hole and set screw on the piece body, realizes the multistage oblique utmost point of rotor, and assembly process is simple, and is efficient.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic structural view of a rotary electric machine punching sheet of the present invention;

fig. 2 is a schematic structural view of a single magnetic pole of the punching sheet of the rotating electrical machine of the present invention;

fig. 3 is a parameter labeling diagram of a single magnetic pole of the punching sheet of the rotating electrical machine of the present invention;

fig. 4 is a parameter labeling diagram of lightening holes of the rotary electric machine punching sheet of the utility model;

fig. 5 is a parameter labeling diagram of the through hole of the punching sheet of the rotating electrical machine of the present invention;

fig. 6 is a schematic view of the positioning hole angle of the rotary electric machine punching sheet of the present invention;

fig. 7 is a schematic view of the multi-stage oblique pole of the rotor of the rotating electrical machine according to the present invention.

Wherein: the magnetic steel groove is 1, the outer end part of the magnetic steel groove is 101, the inner end part of the magnetic steel groove is 102, the magnetic steel is 3, the through hole is 5, the first magnetic bridge is 6, the second magnetic bridge is 7, the lightening hole is 10, the positioning hole is 11, the riveting point is 12, and the D-axis central line is 13.

Detailed Description

As shown in fig. 1, a rotating electrical machines towards piece, including the annular towards the piece body of circle, be provided with a plurality of magnetic poles along circumference symmetric distribution towards the piece body on, every magnetic pole includes a pair of magnet steel groove 1, is equipped with magnet steel 3 in two magnet steel grooves respectively. After the magnetic steel is assembled in the magnetic steel slot 1, the outer side and the inner side of the magnetic steel slot both contain air parts, namely an outer end part 101 of the magnetic steel slot and an inner end part 102 of the magnetic steel slot are formed.

As shown in fig. 2, the two magnetic steel slots 1 are symmetrically distributed about the central line 13 of the magnetic pole D axis, and the mutual distance between a pair of magnetic steel slots 1 is widened from the central line 13 of the magnetic pole D axis to the outer circumference of the sheet; and through holes 5 which are symmetrical about the central line 13 of the magnetic pole D axis are arranged between the two magnetic steel slots 1, and are symmetrical about the central line 13 of the magnetic pole D axis as shown in figure 5. The through-hole 5 may be filled with a non-magnetic material such as resin or air. The upper side and the lower side of the through hole 5 are vertical to a D-axis central line 13 of the magnetic pole, the left side and the right side are parallel to the D-axis central line 13, and the widths of the sides parallel to the through hole and the sides vertical to the D-axis central line 13 are respectively 7.5mm and 7 mm; the lower side edge of the through hole 5 and the innermost point of the inner end part 102 of the magnetic steel slot 1 are positioned on the same straight line, the upper side edge is higher than the connecting line of the closest sharp corner of the magnetic steel 3, and the distance D6 is 2.2 mm.

The utility model discloses an increase the through-hole between V-arrangement magnet steel V angle department, the through-hole can fill non-magnetic conductive material such as resin or air for the increase of D axle magnetic resistance nevertheless does not influence Q axle magnetic resistance, therefore the motor salient pole ratio increases, and the motor performance obtains promoting.

As shown in fig. 3, the included angle α 1 of the two magnetic steel slots 1 is 100 °. The polar arc angle beta 2 of the magnetic steel 3 is 30.5 degrees; the extension line of the long edge of the magnetic steel slot 1 is tangent to the inner end part 102 of the magnetic steel slot 1.

The utility model discloses from rotor punching magnetic circuit design, provided a rotating electrical machines punching, adopted the magnetic circuit structure of V-arrangement, obtain high salient pole ratio through preferred V clamp angle, realize permanent-magnet machine's high performance.

A first magnetic bridge 6 is formed between the outer end part 101 of the magnetic steel groove and the excircle of the punching sheet; second magnetic bridges 7 are formed between the inner end parts 102 of the magnetic steel grooves and the through holes 5 respectively. The width of the first magnetic bridge 6 is 1.5mm, and the width of the second magnetic bridge 7 is 1.15 mm.

As shown in fig. 3-4, a lightening hole 10 is arranged between the triangular area between every two adjacent magnetic poles and the inner circle of the punching sheet. The lightening hole 10 consists of five side edges, wherein the inner side edge is an arc line segment taking the center of the punching sheet as a circular point, and the distance D2 between the inner side edge and the inner circle of the punching sheet is 7 mm; the two middle side edges are parallel to each other, and the distance D9 is 13.2 mm; the two lateral sides of the outer side are parallel to the inner lateral sides of the magnetic steel grooves 1 corresponding to the left and right magnetic poles, and the distance D1 between the two lateral sides and the magnetic steel grooves 1 is 7 mm; the distance D3 between the outermost point and the outer circle of the punching sheet is 15.4 mm; the distance D8 from the outermost point to the inner edge was 19 mm. The weight of the motor is reduced by the lightening holes, and the power density is increased.

The punching sheet body is also provided with an inner circle of riveting points 12 and an outer circle of riveting points 12; the riveting point 12 is of a rectangular structure, and the length of the riveting point is 4mm, and the width of the riveting point is 1 mm. The two rings are uniformly distributed on the symmetry line of the adjacent magnetic poles of the rotor punching sheet, the outer ring riveting point is positioned between the adjacent magnetic poles, and the inner ring riveting point is positioned between the lightening hole 10 and the inner circle of the punching sheet. As shown in fig. 3, the distance D5 from the outer ring riveting point to the outer circle of the punch is 7.9mm, and the distance D4 from the inner ring riveting point to the inner circle of the punch is 4 mm.

As shown in fig. 6, positioning holes 11 are provided between adjacent lightening holes 10, wherein two positioning holes 11 are equally distributed between two lightening holes 10 and between two lightening holes 10 that are symmetrical with respect to the center of the punching sheet, and one positioning hole 11 is distributed between other lightening holes 10.

The number of the magnetic poles in this embodiment is eight, and the number of the corresponding positioning holes 11 is ten, wherein the first positioning hole 1101 and the sixth positioning hole 1106, the second positioning hole 1102 and the seventh positioning hole 1107, the third positioning hole 1103 and the eighth positioning hole 1108, the fourth positioning hole 1104 and the ninth positioning hole 1109, and the fifth positioning hole 1105 and the tenth positioning hole 1110 are all spaced by 180 degrees; taking the D-axis central line of the corresponding magnetic pole of the first positioning hole 1101 as a reference line, the included angles between the reference line and the connecting lines from the circle centers of the first positioning hole 1101, the second positioning hole 1102, the third positioning hole 1103, the fourth positioning hole 1104 and the fifth positioning hole 1105 are respectively θ 1: 0.5 ° to 1 °, θ 2: 41.5-42 °, θ 3: 84-84.5 °, θ 4: 94-94.5 °, θ 5: 136.5 to 137 degrees. Further preferable examples are θ 1: 0.625 °, θ 2: 41.875 °, θ 3: 84.375 °, θ 4: 94.375 °, θ 5: 136.875 deg.

The embodiment also provides a rotating electrical machine rotor, adopts foretell rotating electrical machine towards the piece, includes the pivot and a plurality of through cover in the piece in the pivot towards the piece rotating electrical machine towards the piece, still includes a set screw, through the cooperation towards the locating hole on the piece body and set screw, realizes the multistage oblique utmost point of rotor.

Through the cooperation of locating hole and a set screw, can realize rotor core multistage oblique utmost point, the realization mode is as follows: the visual angle defined in fig. 6 is the a side of the stamped piece, and the other side of the stamped piece is the B side, and the assembly is carried out on the rotating shaft according to the following method:

a first stage: the positioning screw is inserted into the B-surface positioning hole (1103);

in the second stage, a positioning screw is inserted into a positioning hole (1102) on the B surface;

a third stage, a positioning screw is inserted into the positioning hole (1101) on the A surface,

a fourth section, wherein the positioning screw is inserted into the positioning hole (1101) on the B surface;

a fifth section, inserting a positioning screw into the positioning hole (1105) on the surface A;

a sixth stage, inserting the positioning screw into the positioning hole (1104) on the surface A;

with reference to the first segment, the counterclockwise direction is positive, when viewed from the sixth segment of the core to the first segment of the core, the angles of rotation of the second segment of the core to the sixth segment of the core relative to the adjacent previous segment of the core are 2.5 °, 1.25 °, -2.5 °, and the effect after the oblique pole is shown in fig. 7. The utility model discloses a towards the cooperation of locating hole and set screw on the piece body, realize the multistage oblique utmost point of rotor, assembly process is simple, and is efficient.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims

1. The utility model provides a rotating electrical machines is towards piece, includes towards the piece body, be provided with a plurality of magnetic poles along circumference symmetric distribution towards on the piece body, every magnetic pole includes a pair of magnetic steel groove (1), its characterized in that:

the pair of magnetic steel grooves (1) are symmetrically distributed about a magnetic pole D-axis central line (13), and the mutual distance between the pair of magnetic steel grooves (1) is widened towards the outer circumference direction of the punching sheet along the magnetic pole D-axis central line (13); a through hole (5) which is symmetrical about a magnetic pole D axis central line (13) is arranged between the two magnetic steel grooves (1);

first magnetic bridges (6) are respectively formed between the outer end parts (101) of the pair of magnetic steel grooves (1) and the excircle of the punching sheet; second magnetic bridges (7) are formed between the inner end parts (102) of the pair of magnetic steel grooves (1) and the through hole (5) respectively;

a lightening hole (10) is arranged between the area between every two adjacent magnetic poles and the inner circle of the punching sheet; positioning holes (11) are arranged between adjacent lightening holes;

the punching sheet body is also provided with an inner circle and an outer circle of riveting points (12); two circles of riveting points (12) are uniformly distributed on the symmetry line of adjacent magnetic poles of the rotor punching sheet, the outer circle of riveting point is positioned between the adjacent magnetic poles, and the inner circle of riveting point is positioned between the lightening hole (10) and the inner circle of the punching sheet.

2. The rotating electrical machine lamination of claim 1, wherein: the included angle alpha 1 of the pair of magnetic steel grooves (1) is 95-105 degrees; the pair of magnetic steel grooves (1) are respectively provided with magnetic steels (3), and the polar arc angle beta 1 of the two magnetic steels (3) is 30-31 degrees.

3. The rotating electrical machine lamination of claim 2, wherein: the upper side and the lower side of the through hole (5) are vertical to a D-axis central line (13) of the magnetic pole, the left side and the right side are parallel to the D-axis central line (13), and the width of the side of the through hole (5) is 7-8 mm.

4. The rotary electric machine punching sheet according to claim 3, characterized in that: the connecting line between two points with the shortest distance from the pair of magnetic steel grooves (1) to the center of the punching sheet is collinear with the lower side edge of the through hole (5), and the distance D6 between the connecting line between two points with the shortest distance from the pair of magnetic steel grooves (3) and the upper side edge of the through hole (5) is 2-2.5 mm.

5. The rotating electrical machine lamination of claim 1, wherein: the width of the first magnetic bridge (6) is 1.4-1.6 mm, and the width of the second magnetic bridge (7) is 1.1-1.2 mm.

6. The rotating electrical machine lamination of claim 5, wherein: the extension line of the long edge of the magnetic steel (3) of the magnetic steel groove (1) is tangent to the inner end part (102) of the magnetic steel groove (1).

7. The rotating electrical machine lamination of claim 2, wherein: the weight-reducing holes (10) comprise five side edges, wherein the inner side edges are arc line sections taking the center of the punching sheet as a circular point, and the distance D2 between the inner side edges and the inner circle of the punching sheet is 6.5mm to 7.5 mm; the two middle side edges are parallel to each other, and the distance D9 is 12.5 mm-13.5 mm; the two lateral sides of the outer side are parallel to the inner lateral sides of the magnetic steel grooves (1) corresponding to the left and right magnetic poles, and the distance D1 between the two lateral sides and the magnetic steel grooves (1) is 6.5-7.5 mm; the distance D3 between the outermost point and the outer circle of the punching sheet is 15-16 mm; the distance D8 from the outermost point to the inner side edge is 18.5 mm-19.5 mm.

8. The rotating electrical machine lamination of claim 2, wherein: the positioning holes (11) are distributed among the lightening holes (10), wherein two positioning holes (11) are distributed between two lightening holes (10) and between two lightening holes (10) which are symmetrical about the center of the punching sheet, and one positioning hole (11) is distributed among other lightening holes (10).

9. The rotary electric machine lamination of claim 8, wherein: the number of the magnetic poles is eight, the number of the corresponding positioning holes (11) is ten, wherein the first positioning hole (1101) and the sixth positioning hole (1106), the second positioning hole (1102) and the seventh positioning hole (1107), the third positioning hole (1103) and the eighth positioning hole (1108), the fourth positioning hole (1104) and the ninth positioning hole (1109), and the fifth positioning hole (1105) and the tenth positioning hole (1110) are all separated by 180 degrees; taking the D-axis central line of the magnetic pole corresponding to the first positioning hole (1101) as a datum line, and respectively sequentially setting the included angles between the reference line and the connecting lines from the circle centers of the first positioning hole (1101), the second positioning hole (1102), the third positioning hole (1103), the fourth positioning hole (1104) and the fifth positioning hole (1105) to the punching sheet center as theta 1: 0.5 ° to 1 °, θ 2: 41.5-42 °, θ 3: 84-84.5 °, θ 4: 94-94.5 °, θ 5: 136.5 to 137 degrees.

10. The rotating electrical machine lamination of claim 1, wherein: the distance D5 between the outer ring riveting point and the outer circle of the punching sheet is 7.5 mm-8.5 mm, and the distance D4 between the inner ring riveting point and the inner circle of the punching sheet is 3.5 mm-4.5 mm.

11. A rotor of a rotating electrical machine, using the rotating electrical machine punching sheet of any one of claims 1 to 10, characterized in that: the rotor punching sheet comprises a rotating shaft, a plurality of rotating motor punching sheets which are sleeved on the rotating shaft through the inner circle of the punching sheet, and a positioning screw, wherein the multi-section oblique pole of the rotor is realized through the matching of a positioning hole (11) on a punching sheet body and the positioning screw.

12. A rotary electric machine rotor as recited in claim 11, wherein: the quantity of the multi-segment oblique poles of the rotor is six segments, the first segment is used as a reference, the anticlockwise direction is positive, and when the rotor is viewed from the sixth segment iron core to the first segment iron core, the rotating angles of the second segment iron core to the sixth segment relative to the adjacent previous segment iron core are sequentially 2.5 degrees, 1.25 degrees, 2.5 degrees and 2.5 degrees.