CN214337671U - Rotor iron core - Google Patents
Rotor iron core Download PDFInfo
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- CN214337671U CN214337671U CN202120104575.3U CN202120104575U CN214337671U CN 214337671 U CN214337671 U CN 214337671U CN 202120104575 U CN202120104575 U CN 202120104575U CN 214337671 U CN214337671 U CN 214337671U
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Abstract
The utility model discloses a rotor core, including the iron core piece, iron core piece middle part is equipped with the pivot hole, and a plurality of hoof-shaped teeth have evenly been arranged at the iron core piece edge, are equipped with at least one magnet steel groove on the hoof-shaped tooth, are equipped with the magnetism isolating groove between the adjacent hoof-shaped tooth, and the magnet steel groove total number is the even number on the iron core piece. The magnetic steel groove comprises a first magnetic steel groove and a second magnetic steel groove which are far away from the rotating shaft hole from near to far, permanent magnetic materials are filled in the first magnetic steel groove and the second magnetic steel groove, and a magnetic separation bridge is arranged between the edge of the magnetic steel groove and the edge of the horseshoe-shaped tooth. The first magnetic steel groove and the second magnetic steel can be combined to configure a permanent magnet, so that the demagnetization resistance of the rotor is ensured, and the production cost is greatly reduced. The magnetic isolation bridge and the magnetic isolation groove are arranged at the pole-pole magnetic isolation position of the two adjacent permanent magnets, so that a magnetic line of force forms a passage through the pole-pole magnetic isolation position of the two adjacent permanent magnets during magnetizing, the magnetic flux density waveform is improved, and the motor efficiency is improved. The edge of the magnetic steel slot and the outer contour of the trapezoidal teeth act together to form a salient pole structure, so that the torque of the motor is effectively improved, and the noise is reduced.
Description
Technical Field
The utility model relates to a motor parts field especially relates to a rotor core.
Background
A servo motor is an important precise electromechanical component in an automatic control system, and is also an indispensable transmission component in office automation equipment, various vehicles and household appliances, and along with the development of science and technology, the servo motor is developing towards high performance, light, thin, short, permanent, brushless and integrated, and the existing rotor core, for example, "a motor rotor core structure" disclosed in chinese patent literature, and publication No. CN205081596U includes: the permanent magnet slot structure comprises a rotor core and permanent magnet slots, wherein a spindle hole is formed in the axis of the rotor core, the permanent magnet slots are even in number and are uniformly arranged at the position with the largest inner diameter of the rotor core, end parts are arranged at two ends of each permanent magnet slot, the two end parts of each permanent magnet slot are respectively arranged in an inwards concave step shape, the number of steps in the step shape is at least one, and the inwards concave angle of each step is 90 DEG to E
150 degrees, the step-shaped structure and the full-circle outer diameter of the rotor core form a magnetic isolation bridge, so that the permanent magnet groove is closer to the surface of the rotor core or the width of the permanent magnet groove is properly increased; the effective length of the magnetic isolation bridge is properly prolonged; or the outline of the rotor core is cut along the end part of the permanent magnet slot to form a classic salient pole structure of the motor. The utility model discloses can make full use of rotor core's volume, increase moment improves the efficiency of motor. According to the technical scheme, the step-shaped structure of the rotor core and the full-circle outer diameter of the rotor core form a magnetic isolation bridge, the magnetic force of the permanent magnet is weakened while magnetic isolation is achieved, the magnetic density waveform is influenced, the motor efficiency is reduced, and the like.
Disclosure of Invention
The utility model relates to a solve prior art rotor core magnetic force weak, cause the low material cost of motor efficiency high, the big problem of motor noise provides a rotor core who guarantees magnetic force reduce cost simultaneously, improves the motor efficiency noise reduction.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a rotor core comprises an iron core piece and is characterized in that a rotating shaft hole is formed in the middle of the iron core piece, a plurality of horseshoe-shaped teeth are arranged on the edge of the iron core piece, at least one magnetic steel groove is formed in each horseshoe-shaped tooth, a magnetic isolation groove is formed between every two adjacent horseshoe-shaped teeth, and the total number of the magnetic steel grooves in the iron core piece is even. The magnetic steel grooves are arranged on the horseshoe, salient poles are formed by the shape of the horseshoe, and the magnetism isolating grooves reduce magnetic lines of force to form a passage through the magnetism isolating positions between poles of two adjacent permanent magnets during magnetizing, so that the magnetic density waveform is improved.
Preferably, the magnetic steel slots are arranged along the radial direction of the iron core plate. The width of the magnetic steel groove perpendicular to the radial direction of the iron core sheet is increased from the center of the iron core sheet to the outside.
Preferably, the magnetic steel grooves comprise a first magnetic steel groove and a second magnetic steel groove which are far away from the rotating shaft hole from near to far. Permanent magnetic materials are filled in the first magnetic steel groove and the second magnetic steel groove, the first magnetic steel groove and the second magnetic steel groove can be magnetized, the material cost of the rotor is greatly reduced, and the demagnetization resistance of the rotor is kept.
Preferably, a first permanent magnet is arranged in the first magnetic steel groove, a second permanent magnet is arranged in the second magnetic steel groove, and the first permanent magnet and the second permanent magnet are attached along the radial direction of the iron chip. The Ru-Fe-B permanent magnet with excellent magnetic performance is filled in the first magnetic steel groove, the ferrite permanent magnet with lower cost is filled in the second magnetic steel groove, the magnetism of the permanent magnet filled in the same magnetic steel groove is the same, the magnetism of the permanent magnet filled in the adjacent magnetic steel grooves is opposite, the first magnetic steel groove and the second magnetic steel groove are both magnetized radially, and the magnetic force of the rotor core is ensured while the cost is reduced.
Preferably, the magnetic steel grooves are trapezoidal, and the first magnetic steel groove and the second magnetic steel groove are attached along the radial direction of the iron chip. The edge of the magnetic steel slot and the outer contour of the trapezoidal teeth act together to form a salient pole structure, so that the torque of the motor is effectively improved.
Preferably, the magnetic steel grooves are fan-shaped, and the first magnetic steel groove and the second magnetic steel groove are attached along the radial direction of the iron core plate. The edge of the magnetic steel slot and the outer contour of the trapezoidal teeth act together to form a salient pole structure, so that the torque of the motor is effectively improved.
Preferably, a magnetic isolation bridge is arranged between the edge of the magnetic steel groove and the edge of the horseshoe-shaped tooth. The magnetic isolation bridge is matched with the magnetic isolation groove, and when the magnetic field lines are less magnetized, a passage is formed by the magnetic isolation position between the poles of two adjacent permanent magnets, so that the magnetic leakage coefficient is further reduced, the utilization rate of the permanent magnets is improved, and the magnetic flux density waveform is improved.
Preferably, the magnetism isolating groove is U-shaped. The magnetism isolating grooves and the permanent magnet grooves are arranged in a staggered mode and are centrosymmetric, the magnetic flux density magnetic circuit of the permanent magnet motor is improved, and the motor efficiency is improved.
Preferably, the hooves are uniformly arranged on the edge of the iron core plate. The volume of the iron chip is fully and effectively utilized, the salient pole is realized by arranging the permanent magnet on the horseshoe-shaped teeth, the distance is reserved between the horseshoe-shaped teeth and the rotating shaft hole, a smooth magnetic circuit is provided for the reluctance torque of the permanent magnet motor, and the efficiency of the motor is improved.
Preferably, the magnetism isolating groove penetrates through the core plate in the thickness direction. The combination of the plurality of magnetism isolating grooves can improve the tooth space torque of the permanent magnet motor, reduce the vibration and noise of the motor during working and improve the running efficiency of the motor.
Therefore, the utility model discloses following beneficial effect has: (1) the first magnetic steel groove and the second magnetic steel can be combined to configure a permanent magnet, so that the demagnetization resistance of the rotor is ensured, and the production cost is greatly reduced. (2) The magnetic isolation bridge and the magnetic isolation groove are arranged at the pole-pole magnetic isolation position of the two adjacent permanent magnets, so that a magnetic line of force forms a passage through the pole-pole magnetic isolation position of the two adjacent permanent magnets during magnetizing, the magnetic flux density waveform is improved, and the motor efficiency is improved. (3) The edge of the magnetic steel slot and the outer contour of the trapezoidal teeth act together to form a salient pole structure, so that the torque of the motor is effectively improved, and the noise is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the present invention.
In the figure: 1. the magnetic isolation device comprises an iron chip 2, a rotating shaft hole 3, a horseshoe-shaped tooth 4, a magnetic steel groove 5, a first magnetic steel groove 6, a second magnetic steel groove 7, a magnetic isolation groove 8 and a magnetic isolation bridge.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Example 1:
as shown in figure 1, a servo novel rotor core, a rotating shaft hole 2 is arranged in the middle of a rotor core sheet 1, 8 horseshoe-shaped teeth 3 are arranged on the edge of the rotor core sheet 1 at equal intervals along the circumference, a trapezoidal magnetic steel groove 4 is radially arranged on each trapezoidal tooth along the iron core, a salient pole is formed by the edge of each magnetic steel groove 4 and the outline of each trapezoidal tooth under the combined action, the width of each magnetic steel groove 4 is outwards increased by a small amount from the center of the sheet, each magnetic steel groove 4 is divided into a first magnetic steel groove 5 and a second magnetic steel groove 6 which are far away from the rotating shaft hole 2 from the near side, the first magnetic steel groove 5 is connected with the second magnetic steel groove 6, a ferrite permanent magnet is arranged in the second magnetic steel groove 6, a Ru Fe B permanent magnet is arranged in the first magnetic steel groove 5, the anti-demagnetization capability of the rotor is guaranteed, and the production cost is greatly reduced.
A magnetic isolation bridge 8 is arranged between the edge of each magnetic steel groove 4 and the edge of each horseshoe-shaped tooth 3, a U-shaped magnetic isolation groove 7 is arranged between every two adjacent horseshoe-shaped teeth 3, the U-shaped magnetic isolation grooves 7 are communicated along the thickness direction of the rotor iron chip 1, the magnetic isolation bridges 8 are matched with the magnetic isolation grooves 7, when the rotor iron chip is magnetized for a short time, magnetic lines of force form a passage through the magnetic isolation positions between the poles of the two adjacent permanent magnets, the magnetic leakage coefficient is further reduced, the utilization rate of the permanent magnets is improved, the magnetic density waveform is improved, and the motor efficiency is improved.
Example 2:
as shown in figure 2, a rotor core is provided with a rotating shaft hole 2 in the middle of a rotor core sheet 1, a plurality of horseshoe-shaped teeth 3 are arranged on the edge of the rotor core sheet 1 at equal intervals along the circumference, a fan-shaped magnetic steel slot 4 is radially arranged on each trapezoidal tooth along the iron core, the edge of each magnetic steel slot 4 and the outline of each trapezoidal tooth act together to form a salient pole, the width of each magnetic steel slot 4 is increased outwards from the center of the sheet, each magnetic steel slot 4 is divided into a first magnetic steel slot 5 and a second magnetic steel slot 6 which are far away from the rotating shaft hole 2 from the near side, the first magnetic steel slot 5 is connected with the second magnetic steel slot 6, a ferrite permanent magnet is arranged in the second magnetic steel slot 6, a Ru Fe B permanent magnet is arranged in the first magnetic steel slot 5, the demagnetization resistance of the rotor is guaranteed, and the production cost is greatly reduced.
A magnetic isolation bridge 8 is arranged between the edge of each magnetic steel groove 4 and the edge of each horseshoe-shaped tooth 3, a U-shaped magnetic isolation groove 7 is arranged between every two adjacent horseshoe-shaped teeth 3, the U-shaped magnetic isolation grooves 7 are communicated along the thickness direction of the rotor iron chip 1, the magnetic isolation bridges 8 are matched with the magnetic isolation grooves 7, when the rotor iron chip is magnetized for a short time, magnetic lines of force form a passage through the magnetic isolation positions between the poles of the two adjacent permanent magnets, the magnetic leakage coefficient is further reduced, the utilization rate of the permanent magnets is improved, and the magnetic density waveform is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms iron core, spindle bore, horseshoe, magnetic steel slot, magnetic isolation bridge, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A rotor core comprises an iron core piece (1) and is characterized in that a rotating shaft hole (2) is formed in the middle of the iron core piece, a plurality of horseshoe-shaped teeth (3) are arranged on the edge of the iron core piece (1), at least one magnetic steel groove (4) is formed in each horseshoe-shaped tooth (3), a magnetic isolation groove (7) is formed between every two adjacent horseshoe-shaped teeth (3), and the total number of the magnetic steel grooves (4) in the iron core piece (1) is even.
2. A rotor core according to claim 1, characterised in that the magnet steel slots (4) are arranged radially of the core sheet (1).
3. A rotor core according to claim 1, characterized in that the magnet steel slots (4) comprise a first magnet steel slot (5) and a second magnet steel slot (6) from near to far from the shaft hole (2).
4. A rotor core according to claim 3, wherein a first permanent magnet is arranged in the first magnet steel slot (5) and a second permanent magnet is arranged in the second magnet steel slot (6), and the first permanent magnet and the second permanent magnet are radially attached to each other along the core sheet (1).
5. A rotor core according to claim 3 or 4, wherein the magnet steel slots (4) are trapezoidal, and the first magnet steel slot (5) and the second magnet steel slot (6) are radially abutted along the core plate (1).
6. A rotor core according to claim 3 or 4, wherein the magnet steel slots (4) are fan-shaped, and the first magnet steel slot (5) and the second magnet steel slot (6) are radially abutted along the core plate (1).
7. A rotor core according to claim 1, characterized in that a magnetic isolation bridge (8) is arranged between the edge of the magnetic steel slot (4) and the edge of the horseshoe (3).
8. A rotor core according to claim 1, characterised in that the flux barriers (7) are U-shaped.
9. A rotor core according to any of claims 1 or 7, characterized in that the hooves (3) are arranged evenly at the edge of the core sheet (1).
10. A rotor core according to claim 1 or 8, wherein the magnetic shield grooves (7) penetrate in the thickness direction of the core sheet (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120104575.3U CN214337671U (en) | 2021-01-14 | 2021-01-14 | Rotor iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120104575.3U CN214337671U (en) | 2021-01-14 | 2021-01-14 | Rotor iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214337671U true CN214337671U (en) | 2021-10-01 |
Family
ID=77909916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120104575.3U Active CN214337671U (en) | 2021-01-14 | 2021-01-14 | Rotor iron core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214337671U (en) |
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2021
- 2021-01-14 CN CN202120104575.3U patent/CN214337671U/en active Active
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