CN213585317U - Permanent magnet synchronous motor rotor punching sheet for main shaft motor - Google Patents
Permanent magnet synchronous motor rotor punching sheet for main shaft motor Download PDFInfo
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- CN213585317U CN213585317U CN202022852927.1U CN202022852927U CN213585317U CN 213585317 U CN213585317 U CN 213585317U CN 202022852927 U CN202022852927 U CN 202022852927U CN 213585317 U CN213585317 U CN 213585317U
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Abstract
The utility model relates to a PMSM rotor punching sheet for spindle motor, including the punching sheet body, the punching sheet body is whole to be cyclic annular, has evenly seted up a plurality of rivet holes that are used for going on fixing when the punching sheet is range upon range of each other on the ring, still is provided with an even number style of calligraphy magnetic steel groove on the ring, and the both ends of magnetic steel groove are towards the formation breach of warping up towards punching sheet body profile direction, are provided with the lightening hole the same with magnetic steel groove number on the ring, and the lightening hole is triangle-shaped, and the apex angle of lightening hole is towards magnetic steel groove central point and puts; the inner hole of the punching sheet body ring is provided with a plurality of semicircular grooves, and the positions of the semicircular grooves radially correspond to the positions of the rivet holes. The magnetic steel is guided by the magnetic steel groove, so that the magnetic steel is firmly installed and is not easy to fall off; all the magnetic steel grooves and the rivet holes are of symmetrical structures, so that the magnetic circuits of the yoke parts of the rotors under each pole are kept consistent.
Description
Technical Field
The utility model belongs to the motor field especially relates to a PMSM rotor punching for main shaft motor.
Background
The electric spindle is a new technology which integrates a machine tool spindle and a spindle motor into a whole and appears in the field of numerical control machines in recent years. The main shaft is a set of components and comprises an electric main shaft and accessories thereof, the electric main shaft, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changing device and the like. The transmission structure form of the spindle motor and the machine tool spindle which are combined into a whole enables spindle parts to be firstly aligned and independent from a transmission system and an integral structure of the machine tool, and therefore, the spindle motor can be made into a spindle unit which is commonly called as an electric spindle.
The electric main shaft on the market mostly adopts a surface-mounted rotor, the electromagnetic design and the manufacturing process are relatively simple, the rare earth permanent magnet is directly pasted outside a rotor silicon steel sheet, and then a plurality of layers of weftless tapes are coated for drying and curing. However, the electric spindle needs to tell weak magnetism as well as low-speed moment, and the overload multiple requirement is high, the surface-mounted structure is laggard in comparison from the aspect of electrical performance, the surface-mounted magnetic steel is easy to fall off when the electric spindle tells rotation, and the surface-mounted rotor magnetic steel is easier to demagnetize.
Disclosure of Invention
The utility model provides a current electricity main shaft adopt the table to paste formula rotor, and the magnet steel drops easily, influences main shaft moving defect, provides a permanent magnet synchronous machine rotor punching for main shaft motor, sets up the magnet steel groove on the punching for installing the magnet steel, and the punching is laminated the back, and the magnet steel installation is firm, is difficult to drop.
The utility model discloses a concrete technical scheme does: a permanent magnet synchronous motor rotor punching sheet for a spindle motor comprises a punching sheet body, wherein the punching sheet body is integrally annular, a plurality of rivet holes used for fixing punched sheets when the punched sheets are mutually laminated are uniformly formed in the ring, an even number of linear magnetic steel grooves are also formed in the ring, two ends of each magnetic steel groove are raised towards the outline direction of the punching sheet body to form notches, lightening holes with the same number as the magnetic steel grooves are formed in the ring, each lightening hole is triangular, and the vertex angle of each lightening hole faces to the center of the magnetic steel groove; the inner hole of the punching sheet body ring is provided with a plurality of semicircular grooves, and the positions of the semicircular grooves radially correspond to the positions of the rivet holes.
After the motor shaft is pressed into the rotor section, the semicircular groove can release uneven stress, so that the rotor section is not easy to deform, the uniformity of breath after the motor is assembled is ensured, and the jitter of the motor during operation is reduced; the weight reducing holes are triangular, so that the weight of the rotor can be reduced under the condition of not influencing a magnetic circuit, the rotational inertia of the rotor is reduced, the response speed of the motor is improved, and then non-magnetic air is filled in the weight reducing holes after assembly, so that the direction of magnetic lines of force can be changed, and the magnetic lines of force move towards the direction of the magnetic steel to form a closed loop; when the rotor core is in multiple sections, the magnetic steel slots can be used for guiding to ensure that the upper and lower layers of magnetic steel slots are aligned, and the magnetic steel slots are designed into embedded linear magnetic steel, so that D-axis inductance and Q-axis inductance of the motor are different, additional reluctance torque is generated, and the torque density of the motor is improved; the gap is used for further correcting the counter electromotive force waveform of the motor, reducing the harmonic wave of the motor and optimizing the magnetic leakage of the motor. 8 rivet holes are formed in the rotor punching sheet body, each section of the rotor punching sheet can be firmly fixed by 8 rivets, and the magnetic steel grooves cannot be skewed when the inner hole is extruded when the rotor is pressed into the main shaft; the magnetic steel is guided by the magnetic steel groove, so that the magnetic steel is firmly installed and is not easy to fall off; all the magnetic steel grooves and the rivet holes are of symmetrical structures, so that the magnetic circuits of the yoke parts of the rotors under each pole are kept consistent.
Preferably, the outer contour of the punching sheet body is composed of an arc section and a convex section, the convex section is in a linear shape, and the convex section and the arc section are in transition connection through a diagonal section; the position of the protruding section is located between the two groups of adjacent magnetic steel grooves, and the notch of each magnetic steel groove faces the position of the protruding section. The arc sections and the convex sections are arranged according to a certain angle radian, so that the motor has the optimal back electromotive force waveform and less harmonic content.
Preferably, a division bar is arranged between the adjacent magnetic steel grooves, the division bar is of an equal-width structure, and the adjacent magnetic steel grooves are symmetrically arranged relative to the division bar.
Preferably, the gap of the magnetic steel groove is defined by an end edge, a straight edge and a bevel edge, the straight edge is perpendicular to the end edge, the bevel edge is in an obtuse angle relative to the straight edge, so that the width of the middle position of the magnetic steel groove is smaller than the width of the two ends, and the end edges of the adjacent magnetic steel grooves are parallel to each other.
Preferably, the magnetic steel groove is stepped towards two ends of the side edge of the inner hole of the ring.
Preferably, the angle of the top angle of the lightening hole is 60 degrees, two side edges of the top angle are straight edges, the bottom edge opposite to the top angle is an arc edge, and the arc edge is parallel to the arc edge of the inner hole of the ring.
Further preferably, the rivet hole divide into two rings and set up, and half quantity of rivet hole distributes in the outer lane, and half quantity of rivet hole distributes in the inner circle.
Further preferably, one of the semicircular grooves of the inner hole of the ring is a marking groove, and the diameter of the marking groove is smaller than that of the rest of the semicircular grooves. The marking grooves can ensure the consistency of the direction of the rotor punching sheet during laminating, and are favorable for the laminating uniformity.
The utility model has the advantages that: after the motor shaft is pressed into the rotor section, the semicircular groove can release uneven stress, so that the rotor section is not easy to deform, the uniformity of breath after the motor is assembled is ensured, and the jitter of the motor during operation is reduced; the weight reducing holes are triangular, so that the weight of the rotor can be reduced under the condition of not influencing a magnetic circuit, the rotational inertia of the rotor is reduced, the response speed of the motor is improved, and then non-magnetic air is filled in the weight reducing holes after assembly, so that the direction of magnetic lines of force can be changed, and the magnetic lines of force move towards the direction of the magnetic steel to form a closed loop; when the rotor core is in multiple sections, the magnetic steel slots can be used for guiding to ensure that the upper and lower layers of magnetic steel slots are aligned, and the magnetic steel slots are designed into embedded linear magnetic steel, so that D-axis inductance and Q-axis inductance of the motor are different, additional reluctance torque is generated, and the torque density of the motor is improved; the gap is used for further correcting the counter electromotive force waveform of the motor, reducing the harmonic wave of the motor and optimizing the magnetic leakage of the motor. 8 rivet holes are formed in the rotor punching sheet body, each section of the rotor punching sheet can be firmly fixed by 8 rivets, and the magnetic steel grooves cannot be skewed when the inner hole is extruded when the rotor is pressed into the main shaft; the magnetic steel is guided by the magnetic steel groove, so that the magnetic steel is firmly installed and is not easy to fall off; all the magnetic steel grooves and the rivet holes are of symmetrical structures, so that the magnetic circuits of the yoke parts of the rotors under each pole are kept consistent.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. semicircular groove, 2, marking groove, 3, protruding section, 4, magnetic steel groove, 5, circular arc section, 6, breach, 7, rivet hole, 8, lightening hole, 9, slash section, 10, straight flange, 11, parting bead, 12, hypotenuse.
Detailed Description
The invention will be further described with reference to specific embodiments and with reference to the accompanying drawings.
Example (b):
as shown in fig. 1, a PMSM rotor punching sheet for spindle motor, including the punching sheet body, the punching sheet body is whole to be cyclic annularly, has evenly seted up 8 on the ring and is used for carrying out the rivet hole fixed when the punching sheet is range upon range of each other, still is provided with 8 a style of calligraphy magnet steel grooves on the ring, and the rivet hole is in the position between two adjacent magnet steel grooves. The ring is provided with lightening holes 8 with the same number as the magnetic steel grooves, the inner hole of the punching sheet body ring is provided with 8 semicircular grooves, and the positions of the semicircular grooves radially correspond to the positions of the rivet holes.
The outer contour of the punching sheet body is composed of an arc section 5 and a convex section 3, the convex section is in a straight line shape, the convex section is connected with the arc section through an inclined line section 9 in a transition mode, and the position of the convex section is located between two groups of adjacent magnetic steel grooves.
The two ends of the magnetic steel groove are tilted towards the profile direction of the punching sheet body to form a notch 6, and the notch of the magnetic steel groove faces the position of the protruding section. The lightening holes are triangular, and the triangular vertex angles of the lightening holes face the center of the magnetic steel groove. The angle of the top angle of the lightening hole is 60 degrees, two side edges of the top angle are straight edges, the bottom edge opposite to the top angle is an arc edge, and the arc edge is parallel to the arc edge of the inner hole of the ring.
The gap of the magnetic steel groove is enclosed by an end edge, a straight edge 10 and a bevel edge 12, the straight edge is perpendicular to the end edge, the bevel edge is in an obtuse angle relative to the straight edge, so that the width of the middle position of the magnetic steel groove is smaller than the width of two ends, the end edges of adjacent magnetic steel grooves are parallel to each other, and the bevel edge is parallel to the oblique line section of the outline. The two ends of the magnetic steel groove facing the side edge of the inner hole of the ring are in a step shape.
And a spacing strip 11 is arranged between the adjacent magnetic steel grooves, the spacing strip is of an equal-width structure, and the adjacent magnetic steel grooves are symmetrically arranged relative to the spacing strip.
The rivet hole divide into two rings and sets up, and half quantity of rivet hole distributes in the outer lane, and half quantity of rivet hole distributes in the inner circle.
One of the semicircular grooves of the inner hole of the ring is a marking groove 2, and the diameter of the marking groove is smaller than that of the rest semicircular grooves 1.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.
Claims (8)
1. A permanent magnet synchronous motor rotor punching sheet for a spindle motor is characterized by comprising a punching sheet body, wherein the punching sheet body is integrally annular, a plurality of rivet holes (7) used for fixing the punching sheets when the punching sheets are mutually laminated are uniformly formed in the ring, an even number of linear magnetic steel grooves (4) are also formed in the ring, two ends of each magnetic steel groove are raised towards the outline direction of the punching sheet body to form notches (6), lightening holes (8) with the same number as the magnetic steel grooves are formed in the ring, each lightening hole is triangular, and the vertex angle of each lightening hole faces to the center of each magnetic steel groove; the inner hole of the punching sheet body ring is provided with a plurality of semicircular grooves, and the positions of the semicircular grooves radially correspond to the positions of the rivet holes.
2. The rotor punching sheet of the permanent magnet synchronous motor for the spindle motor as recited in claim 1, wherein the outer contour of the punching sheet body is composed of an arc section (5) and a convex section (3), the convex section is linear, and the convex section and the arc section are transitionally connected through an oblique line section (9); the position of the protruding section is located between the two groups of adjacent magnetic steel grooves, and the notch of each magnetic steel groove faces the position of the protruding section.
3. The rotor punching sheet of the permanent magnet synchronous motor for the spindle motor as recited in claim 1, wherein a spacer (11) is arranged between adjacent magnetic steel slots, the spacer is of an equal-width structure, and the adjacent magnetic steel slots are symmetrically arranged relative to the spacer.
4. The rotor sheet of the permanent magnet synchronous motor for the spindle motor as claimed in claim 1, 2 or 3, wherein the gap of the magnetic steel slot is enclosed by an end edge, a straight edge (10) and a bevel edge (12), the straight edge is perpendicular to the end edge, the bevel edge is in an obtuse angle shape relative to the straight edge so that the width of the middle position of the magnetic steel slot is smaller than the width of the two ends, and the end edges of the adjacent magnetic steel slots are parallel to each other.
5. The rotor sheet of the PMSM for the spindle motor as recited in claim 4, wherein the two ends of the magnetic steel slots facing the side of the ring inner hole are stepped.
6. The rotor sheet of the permanent magnet synchronous motor for the spindle motor as claimed in claim 1, 2 or 3, wherein the angle of the top corner of the lightening hole is 60 °, two side edges of the top corner are straight edges, and the bottom edge opposite to the top corner is an arc edge which is parallel to the arc edge of the inner hole of the ring.
7. The rotor sheet of the permanent magnet synchronous motor for the spindle motor as claimed in claim 1, 2 or 3, wherein the rivet holes are arranged in two circles, half of the rivet holes are distributed in the outer circle, and the other half of the rivet holes are distributed in the inner circle.
8. The rotor punching sheet of the permanent magnet synchronous motor for the spindle motor as recited in claim 1, wherein one of the semicircular grooves of the ring inner hole is a marking groove (2), and the diameter of the marking groove is smaller than the diameter of the other semicircular grooves (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022852927.1U CN213585317U (en) | 2020-12-02 | 2020-12-02 | Permanent magnet synchronous motor rotor punching sheet for main shaft motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022852927.1U CN213585317U (en) | 2020-12-02 | 2020-12-02 | Permanent magnet synchronous motor rotor punching sheet for main shaft motor |
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| Publication Number | Publication Date |
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| CN213585317U true CN213585317U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022852927.1U Active CN213585317U (en) | 2020-12-02 | 2020-12-02 | Permanent magnet synchronous motor rotor punching sheet for main shaft motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023166876A1 (en) * | 2022-03-04 | 2023-09-07 | 三菱電機株式会社 | Rotating electric machine |
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2020
- 2020-12-02 CN CN202022852927.1U patent/CN213585317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023166876A1 (en) * | 2022-03-04 | 2023-09-07 | 三菱電機株式会社 | Rotating electric machine |
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