CN210092990U - Permanent magnet motor punching sheet - Google Patents
Permanent magnet motor punching sheet Download PDFInfo
- Publication number
- CN210092990U CN210092990U CN201920930405.3U CN201920930405U CN210092990U CN 210092990 U CN210092990 U CN 210092990U CN 201920930405 U CN201920930405 U CN 201920930405U CN 210092990 U CN210092990 U CN 210092990U
- Authority
- CN
- China
- Prior art keywords
- punching sheet
- motor
- rotor
- permanent magnet
- rotor punching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides a permanent-magnet machine is towards piece belongs to permanent-magnet machine technical field. The permanent magnet motor solves the problems of large torque pulsation and high manufacturing cost of the existing permanent magnet motor. The permanent magnet motor punching sheet comprises a rotor punching sheet, wherein a mounting hole in the center and magnetic isolation bridge holes evenly distributed at the edge of the rotor punching sheet are formed in the rotor punching sheet, the magnetic isolation bridge holes are used for mounting magnetic steel, the edge of the outer ring of the rotor punching sheet is divided into a plurality of regions with the same number as the number of poles of a motor, and the circle center of each region and the center of the rotor punching sheet are eccentrically arranged. The utility model has the advantages of the pulsation torque that the motor harmonic caused is little, and the wholeness can be good.
Description
Technical Field
The utility model relates to a permanent-magnet machine technical field specifically is a permanent-magnet machine is towards piece.
Background
During the rotation of the motor, the instantaneous output torque varies with time, but moves up and down around a certain average value, which is called torque ripple. If the torque ripple is large, the stability of the load is low. In short, the jitter is very large, the speed stability is also affected, and the energy consumption of the motor is increased.
The permanent magnet motor has the advantages of small volume, light weight, high efficiency, energy conservation and the like, and is widely applied to the aspects of industrial production, civil use and the like. With the emergence of new permanent magnetic materials, modern rare earth permanent magnet machines have a trend towards high power and high speed development, and are also more and more widely applied to transmission systems. In the design of a high-power permanent magnet motor, a stator winding of the motor is usually a formed winding, a stator punching sheet adopts a rectangular open slot, the width of the slot opening is large, a strong tooth space effect can be generated, and large tooth harmonic potential, tooth space torque and torque pulsation are accompanied in the operation of the motor. The existing permanent magnet motor generally adopts a mode of enlarging a stator and a rotor uniform air gap and adopting a stator chute or a rotor oblique pole to reduce the torque pulsation of the motor, however, the mode has some defects: the stator chute has high process difficulty, and the stator can rotate to different degrees after the chute is welded, so that the consistency of stator cores of the motor is poor, and the performance of the same batch of motors is different; the rotor oblique pole has the defects that the rotor assembly difficulty is increased, the rotor oblique pole needs to be installed through a section of reversed phase, and if the rotor oblique pole is installed in a wrong way, the whole rotor is scrapped most seriously. The output torque of the motor is reduced no matter the stator skewed slot and the rotor skewed pole are increased or the air gap is increased, the counter electromotive force of the motor is reduced, the current of the motor is increased, the efficiency is lowered, and the overall performance of the motor is affected.
On the other hand, the existing permanent magnet motor can generate a complex space harmonic magnetic field due to the limitation of pole slot matching selection, slot opening, local saturation and the like, and further can cause induced voltage harmonic waves and torque pulsation of a motor winding, so that the stable control and operation of the motor are not facilitated. In view of the above problems, it is common practice to attenuate the effects of air gap harmonics by means of rotor skewed slots, i.e. rotor poles. However, for the Interior Permanent Magnet (IPM) rotor, due to the structural particularity, a continuous pole-slanting method that each punching sheet rotates in sequence along the axial direction by a fixed angle cannot be adopted, and usually, only the permanent magnet and the rotor core are respectively segmented to perform pole-slanting, so that the manufacturing process is poor, a plurality of molds are required when the rotor punching sheet is manufactured, and the permanent magnet needs to be segmented and then respectively inserted into each rotor core segment, which increases the production cost and is not beneficial to the improvement of the production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem that exists among the prior art, it is little to provide a pulsating torque, reduces the motor and makes the degree of difficulty and manufacturing cost, permanent-magnet machine towards the piece that wholeness can be good.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: the permanent magnet motor punching sheet comprises a rotor punching sheet and is characterized in that a mounting hole in the center and magnetic isolation bridge holes evenly distributed at the edge of the rotor punching sheet are formed in the rotor punching sheet, magnetic steel is mounted in the magnetic isolation bridge holes, the edge of the outer ring of the rotor punching sheet is divided into a plurality of regions with the same number as the number of poles of a motor, and the circle center of each region and the center of the rotor punching sheet are eccentrically arranged.
The utility model discloses a theory of operation: the rotor punching sheet is divided into a plurality of areas with the same number of poles as the motor, the circle center of each area and the center of the rotor punching sheet are eccentrically arranged, so that each area of the rotor punching sheet is protruded relative to the original circular rotor punching sheet, therefore, the air gaps of the stator and the rotor are smaller, an eccentric distance with the air gaps of the stator and the rotor closer to sinusoidal distribution is selected through an approximation method, under the condition that the magnetic steel excitation is uniform and constant, the closer the air gaps of the stator and the rotor are to the sinusoidal distribution, the lower the harmonic content of the magnetic field of the excitation air gap is, and the smaller the pulsation. By adopting the structure, the motor shake can be effectively reduced, the motor operation stability is greatly increased, and the overall performance of the motor is ensured.
In the permanent magnet motor punching sheet, the magnetic isolation bridge hole adopts a deep groove structure between the N pole and the S pole of the magnetic steel.
In the permanent magnet motor punching sheet, the rotor punching sheet is further provided with a ventilation hole located on the inner side of the magnetic isolation bridge hole, and the ventilation hole is used for reducing the temperature of magnetic steel, reducing the weight of the rotor and reducing inertia.
In the permanent magnet motor punching sheet, the number of the ventilation holes is the same as the number of poles of the motor.
Compared with the prior art, the permanent magnet motor punching sheet has the beneficial effects that: the cogging torque and the torque pulsation of the motor can achieve the effect of a skewed slot or a skewed pole on the basis of not needing a skewed slot of a stator or a skewed pole of a rotor; the manufacturing difficulty of the motor is greatly reduced, the production efficiency is improved, the motor efficiency is improved, and the motor performance is improved; the rotor is provided with a ventilation hole, so that the temperature of the magnetic steel is reduced, the weight of the rotor is reduced, and the inertia is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a conventional general permanent magnet motor punching sheet;
fig. 2 is a schematic structural diagram of the present invention;
in the figure, 1, a rotor sheet; 2. a magnetic isolation bridge hole; 3. a deep trench structure; 4. a vent hole; 5. and (7) installing holes.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the conventional common permanent magnet motor punching sheet includes a rotor punching sheet 1, a mounting hole 1.1, a vent hole 1.2, and a magnetic bridge hole 1.3, where the mounting hole 1.1 is located at a circle center of the rotor punching sheet 1, and the vent hole 1.2 and the magnetic bridge hole 1.3 are respectively and uniformly distributed in a circumferential direction of the rotor punching sheet 1, and the number of the vent holes is the same as the number of poles of the motor.
As shown in fig. 2, the permanent magnet motor punching sheet comprises a rotor punching sheet 1, wherein a mounting hole 5 located at the center and magnetic separation bridge holes 2 evenly distributed at the edge of the rotor punching sheet 1 are formed in the rotor punching sheet 1, the magnetic separation bridge holes 2 are used for mounting magnetic steel, the edge of the outer ring of the rotor punching sheet 1 is divided into a plurality of regions with the same number as the number of poles of a motor, and the center of each region and the center of the rotor punching sheet 1 are eccentrically arranged. The rotor punching sheet 1 is divided into a plurality of areas with the same number as the poles of the motor, the circle center of each area and the center of the rotor punching sheet 1 are eccentrically arranged, so that each area of the rotor punching sheet 1 is protruded relative to the original circular rotor punching sheet 1, the air gaps of the stator and the rotor are smaller, an eccentric distance with the air gaps of the stator and the rotor closer to sinusoidal distribution is selected through an approximation method, the closer the air gaps of the stator and the rotor to the sinusoidal distribution is, the lower the harmonic content of the magnetic field of the excitation air gap is under the condition that the magnetic steel excitation is uniform and constant, and the smaller the pulsation torque caused by.
Preferably, in order to reduce the magnetic leakage of the motor and improve the utilization rate of the magnetic steel, the magnetic isolation bridge hole 2 adopts a deep groove structure 3 between the N pole and the S pole of the magnetic steel. Meanwhile, the built-in magnetic steel design is adopted, the quadrature axis and direct axis inductances of the motor are increased, so that the reluctance torque is fully utilized, the output torque of the motor is increased, and the MAXWELL parameterized design is preferably adopted to optimize the pole arc coefficient of the motor and eliminate the number of the harmonic waves of the cogging torque of the motor.
Preferably, the rotor punching sheet 1 is further provided with a ventilation hole 4 located on the inner side of the magnetic isolation bridge hole 2, and the ventilation hole 4 is used for reducing the temperature of the magnetic steel, reducing the weight of the rotor and reducing the inertia.
Preferably, the number of the vent holes 4 is the same as the number of poles of the motor.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms rotor sheet 1, magnetic isolation bridge hole 2, deep groove structure 3, vent hole 4, mounting hole 5, 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 in a manner that is inconsistent with the spirit of the invention.
Claims (4)
1. The utility model provides a permanent magnet motor punching sheet, includes rotor punching sheet (1), its characterized in that, rotor punching sheet (1) on set up mounting hole (5) that are located the center and evenly distributed in separating magnetic bridge hole (2) at rotor punching sheet (1) edge, separate magnetic bridge hole (2) and be used for installing the magnet steel, rotor punching sheet (1) outer lane edge divide into a plurality of regions with the same quantity of motor number of poles, the centre of a circle and rotor punching sheet (1) center eccentric settings in every region.
2. The permanent magnet motor punching sheet according to claim 1, wherein the magnetic isolation bridge hole (2) adopts a deep groove structure (3) between the N pole and the S pole of the magnetic steel.
3. The permanent magnet motor punching sheet according to claim 1, wherein the rotor punching sheet (1) is further provided with a ventilation hole (4) located on the inner side of the magnetic isolation bridge hole (2), and the ventilation hole (4) is used for reducing the temperature of magnetic steel, reducing the weight of the rotor and reducing inertia.
4. The punching sheet of the permanent magnet motor as claimed in claim 3, wherein the number of the vent holes (4) is the same as the number of poles of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920930405.3U CN210092990U (en) | 2019-06-20 | 2019-06-20 | Permanent magnet motor punching sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920930405.3U CN210092990U (en) | 2019-06-20 | 2019-06-20 | Permanent magnet motor punching sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210092990U true CN210092990U (en) | 2020-02-18 |
Family
ID=69483458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920930405.3U Active CN210092990U (en) | 2019-06-20 | 2019-06-20 | Permanent magnet motor punching sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210092990U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117850A (en) * | 2020-09-24 | 2020-12-22 | 安徽飞翔电器有限公司 | Mine explosion-proof special motor fanning strip |
| CN114421669A (en) * | 2021-12-27 | 2022-04-29 | 马勒汽车技术(苏州)有限公司 | Rotor magnetic steel sheet, rotor oblique pole unit and oblique pole type rotor |
-
2019
- 2019-06-20 CN CN201920930405.3U patent/CN210092990U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117850A (en) * | 2020-09-24 | 2020-12-22 | 安徽飞翔电器有限公司 | Mine explosion-proof special motor fanning strip |
| CN114421669A (en) * | 2021-12-27 | 2022-04-29 | 马勒汽车技术(苏州)有限公司 | Rotor magnetic steel sheet, rotor oblique pole unit and oblique pole type rotor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101651395A (en) | Sine wave current self-starting three-phase rare earth permanent-magnetism synchronous motor | |
| CN210092990U (en) | Permanent magnet motor punching sheet | |
| CN104113154A (en) | Embedded PMSM for turning-type electric main shaft | |
| CN203301332U (en) | Permanent magnet synchronous motor used for air conditioning compressor | |
| CN201113738Y (en) | Independent pole axial phase-splitting switched reluctance motor | |
| CN201478968U (en) | Sine current self-starting three-phase rare-earth permanent-magnet synchronous motor | |
| CN203522484U (en) | Permanent-magnet wheel hub motor structure | |
| CN217522644U (en) | Novel stator and rotor structure of hybrid excitation asynchronous starting permanent magnet synchronous motor | |
| CN215580572U (en) | Low-noise high-strength permanent magnet motor stator structure | |
| CN212572212U (en) | Rotor punching sheet for motor | |
| CN211930360U (en) | Magnetic steel, synchronous motor rotor with same and synchronous motor | |
| CN209419454U (en) | A kind of no mouse cage self-start permanent-magnet synchronous motor | |
| JP2000253633A (en) | Rotating machine | |
| CN209805641U (en) | permanent magnet motor and compressor and air conditioner with same | |
| CN106300733A (en) | Interior permanent magnet machines based on I type rotor structure | |
| CN101924442B (en) | Permanent magnet synchronous motor with damping slot on rotor | |
| CN202034842U (en) | Permanent magnet synchronous servo motor for elevator | |
| CN217036860U (en) | Rotor punching sheet for low-speed large-torque motor | |
| CN111181338A (en) | High-voltage permanent magnet intelligent driving system for water conservancy vertical shaft | |
| CN104333159A (en) | Low-torque-ripple permanent magnet motor for electric automobile | |
| CN216414006U (en) | Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island | |
| CN211127345U (en) | Rotor punching sheet, rotor, motor and compressor | |
| CN204168025U (en) | Low torque fluctuation permanent magnetic motor used for electric vehicle | |
| CN213937563U (en) | A wrong utmost point rotor structure for exchanging synchronous servo motor of permanent magnetism | |
| CN217282408U (en) | Iron core for inhibiting torque fluctuation and permanent magnet synchronous motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Stamping plate of permanent magnet motor Effective date of registration: 20220922 Granted publication date: 20200218 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2022980016005 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230920 Granted publication date: 20200218 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2022980016005 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A type of permanent magnet motor lamination Effective date of registration: 20230924 Granted publication date: 20200218 Pledgee: Bank of Jinhua Limited by Share Ltd. science and Technology Branch Pledgor: JINHUA JIANGKE POWER Co.,Ltd. Registration number: Y2023980058711 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |