CN214337760U - Rotor structure and disk motor that sectional type magnet steel was arranged - Google Patents
Rotor structure and disk motor that sectional type magnet steel was arranged Download PDFInfo
- Publication number
- CN214337760U CN214337760U CN202022676511.9U CN202022676511U CN214337760U CN 214337760 U CN214337760 U CN 214337760U CN 202022676511 U CN202022676511 U CN 202022676511U CN 214337760 U CN214337760 U CN 214337760U
- Authority
- CN
- China
- Prior art keywords
- rotor
- disc
- motor
- unit part
- magnetic
- 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
Abstract
The utility model discloses a rotor structure and disc motor that sectional type magnet steel was arranged, include: the rotor disc is distributed with magnetic steel grooves, and magnetic steels are embedded in the magnetic steel grooves; the magnet steel includes: a unit part formed by dividing along the radial direction of the rotor disc; the first unit part is spliced between the second unit part and the third unit part and closes magnetic lines of force along the axial direction of the motor to form a first magnetic field generated along the axial direction of the motor; the second unit part closes magnetic lines of force along the radial direction of the motor to form a second magnetic field which is vertically directed to the splicing surface on the first unit part; the third unit part closes magnetic lines of force along the radial direction of the motor to form a third magnetic field which is vertically directed to the splicing surface on the first unit part; two adjacent magnetic steels on the rotor disk: the closing directions of the magnetic lines of the first unit parts are opposite, the closing directions of the magnetic lines of the second unit parts are the same, and the closing directions of the magnetic lines of the third unit parts are the same. The magnetic steel blocks can reduce eddy current loss of the permanent magnet and reduce the risk of falling of the magnetic steel due to overheating.
Description
Technical Field
The invention relates to the technical field of disc motors, in particular to a rotor structure with sectional magnetic steel arrangement and a disc motor.
Background
The permanent magnet of the disc type motor rotor is mainly installed by adopting a whole piece of magnetic steel surface-mounted rotor back iron, and the permanent magnet of the structure can generate quite large eddy current loss when the motor runs at high speed, so that the phenomenon of demagnetization caused by overhigh temperature of the permanent magnet and even the phenomenon of falling off of the permanent magnet are caused. The permanent magnet with the structure has larger eddy current loss, and the high-coercivity neodymium iron boron permanent magnet is used in a large amount, so that the integral manufacturing cost of the motor is high.
The existing permanent magnet segmentation technology only equally divides a permanent magnet in the same magnetizing direction into a plurality of permanent magnets, although the eddy current loss of the permanent magnet can be effectively reduced, the magnetizing mode has serious magnetic leakage and poor magnetic field enhancement effect.
At present, a double-rotor single-stator disc type motor is poor in heat dissipation effect, a stator winding is possibly overheated, a winding insulation layer is damaged, heat generated by overheating of the stator winding is difficult to dissipate, a permanent magnet on a rotor is also possibly overheated, irreversible demagnetization occurs to the permanent magnet, and the output performance of the motor is seriously affected.
Disclosure of Invention
The technical scheme of the invention is as follows: the utility model provides a rotor structure and disc motor that sectional type magnet steel was arranged for solve:
1. when the permanent magnet of the disk type permanent magnet motor rotor is installed by adopting the whole piece of magnetic steel, when the motor runs at a high speed, considerable eddy current loss can be generated inside the permanent magnet motor rotor, so that the demagnetization phenomenon can occur when the temperature of the permanent magnet is too high, and even the permanent magnet falls off.
2. The disc type permanent magnet motor has poor heat dissipation effect, and the stator of the disc type permanent magnet motor needs to be cooled in order to prevent the demagnetization of the permanent magnet.
A rotor structure that sectional type magnet steel that relates to in this scheme was arranged includes: a rotor disc formed by laminating silicon steel sheets, wherein a magnetic steel groove is distributed on the rotor disc, and magnetic steel is embedded in the magnetic steel groove; the magnet steel includes: the unit parts are formed by radially dividing the rotor disc and are in contact butt joint through splicing surfaces.
The unit section specifically includes: a first unit section, a second unit section, and a third unit section. Wherein:
the first unit part is spliced between the second unit part and the third unit part, and closes magnetic lines of force along the axial direction of the motor to form a first magnetic field generated along the axial direction of the motor, namely a basic magnetic field;
the second unit part closes magnetic lines of force along the radial direction of the motor to form a second magnetic field which is vertically directed to the splicing surface on the first unit part, namely an enhanced magnetic field is formed;
the third unit part closes magnetic lines of force along the radial direction of the motor to form a third magnetic field which is vertically directed to the splicing surface on the first unit part, namely an enhanced magnetic field is also formed;
depending on the direction of the magnetic field lines, the reinforcing magnetic field produces a component of the magnetic field lines which is in the same direction as the basic magnetic field and which can amplify the basic magnetic field.
Two adjacent magnetic steels on the rotor disk: the closing directions of the magnetic lines of the first unit parts are opposite, the closing directions of the magnetic lines of the second unit parts are the same, and the closing directions of the magnetic lines of the third unit parts are the same.
Preferably, the magnetic steel is a strip-shaped fan-shaped structure on the transverse section, and the magnetic steel is of a three-section structure on the transverse section, namely: the second unit part, the first unit part and the third unit part are sequentially spliced to form the combined type solar cell, and the third unit part and the second unit part are similar in shape and identical in radial length.
Preferably, the magnetic steel is a permanent magnet, wherein:
the first unit part is magnetized along the axial direction of the motor to form a first magnetic field;
the second unit part is magnetized along the radial direction of the motor to form a second magnetic field;
the third unit part is magnetized along the radial direction of the motor to form a third magnetic field.
Based on the sectional type magnetic steel structure, according to parametric modeling simulation, a common disc type motor is compared with the disc type motor designed by the scheme, torque curves of the two motors are obtained, and comparison shows that the torque of the disc type motor designed by the scheme is obviously enhanced, namely the sectional type magnetic steel is adopted to enhance the torque of the disc type motor with an increased magnetic field, the torque pulsation is in a reasonable range, and the actual measurement is improved by 5% -18% compared with the torque of the common disc type motor.
The second unit part, the first unit part and the third unit part are in butt joint through the splicing surfaces. Specifically, the unit parts are in contact bonding through coating structural adhesive on adjacent splicing surfaces.
Based on the amplification of the magnetic field, the density of the magnetic lines of force is denser than that of the common magnetic steel, so that heat is more easily generated. For this purpose, an air-cooling structure is added, i.e. a fan blade region is arranged on the rotor disk. The fan blade area is located the side of rotor dish footpath magnet steel, has arranged the heliciform blade that distributes along the axle direction equidistance in the fan blade area. When the rotor disc rotates, the spiral blades in the fan blade area generate airflow flow according to the principle of a fan, so that air on the rear side of the rotor disc can be sucked into an air gap between the stator and the rotor to cool the stator winding and the rotor magnetic steel; at the same time, the air entering between the stator and the rotor from the outside of the rotor is also taken out, so that a cooling cycle can be formed.
Specifically, a first fan blade area and a second fan blade area can be arranged on the rotor disc, and the first fan blade area and the second fan blade area are respectively located on two sides of the magnetic steel in the radial direction of the rotor disc.
The fans on both sides can adopt the spiral blades in the same spiral direction, so that the spiral blades push airflow in a single direction, namely, air inlets or air outlets are simultaneously formed in the air gaps between the stator and the rotor. At this time, the air circulation effect is not prominent. If the fans on the two sides adopt spiral blades in different spiral directions, air is fed into one side of each fan, and air is discharged from the other side of each fan, better convection can be formed, and the cooling circulation effect of airflow is also optimal.
The spiral blades in each fan blade area are generally odd, so that the design principle of the fan blades is met, the spiral angle of each spiral blade has no specific requirement and is determined according to the preparation process and the processing difficulty. At present, the common helix angle of a common fan, i.e. 90 degrees, is used.
Based on above-mentioned structure, a disk motor includes: stator and rotor on both sides of the stator.
The rotor comprises a rotor disc, magnetic steel grooves are distributed on the rotor disc, the segmented magnetic steel is embedded into the magnetic steel grooves, and a rotating shaft is assembled in a shaft hole of the rotor disc in a key connection mode.
The magnet steel in the magnet steel groove includes:
the first unit part is magnetized along the axial direction of the motor to form a first magnetic field;
the second unit part is magnetized along the radial direction of the motor to form a second magnetic field;
the third unit part is magnetized along the radial direction of the motor to form a third magnetic field.
And the two sides of the radial magnetic steel of the rotor disc are respectively provided with a fan blade area, and spiral blades are arranged in the fan blade areas.
Preferably, the stator comprises a stator disc, the stator disc is provided with a winding, and a shaft hole of the stator disc is assembled with the rotating shaft through a bearing.
Preferably, the stator disc is of a coreless stator construction.
Specifically, the stator and the rotor are integrated in a shell, and the shell comprises end covers on two sides and a rotary shell between the end covers on the two sides. The rotary shell comprises a left shell and a right shell, and the left shell and the right shell are butted to form a butt joint end.
The stator is fixedly connected to the butt joint end of the left shell and the right shell through the stator disc and is assembled and connected, and the rotating shaft is assembled with the shaft hole in the end cover through the bearing.
Therefore, the double-rotor single-stator structural arrangement can form a reinforcing structure which is symmetrically arranged on two sides, and air cooling is performed from two sides, so that the air cooling effect is more prominent.
The invention has the advantages that:
1. the permanent magnet blocks can effectively reduce the eddy current loss of the permanent magnet and reduce the risk of falling of the permanent magnet due to overheating. By optimally combining the permanent magnet material with large intrinsic coercivity and small residual magnetic flux density and the permanent magnet material with small intrinsic coercivity and large residual magnetic flux density in a segmented manner, the neodymium iron boron with low cost and large intrinsic coercivity can be used at least under the condition of ensuring the demagnetization resistance of the motor, so that the working efficiency of the disc motor is improved, and the cost of the motor rotor with the segmented magnetic steel structure can be reduced.
2. The motor structure is a disc structure of a double-rotor middle stator, the winding on the middle stator is difficult to radiate heat, the rotor discs at the left end and the right end are respectively provided with a fan-blade-shaped helical blade, the helical blade on the rotor disc at the left end sucks air, and finally an air cooling loop is formed to cool the stator winding.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a cross-sectional view of a rotor structure of a segmented magnetic steel arrangement;
fig. 2 is a cross-sectional view of a dual rotor single stator disc motor;
FIG. 3 is a front view of a rotor disk;
FIG. 4 is a front view of the spindle;
FIG. 5 is a first combination of sectional magnetic steels;
FIG. 6 is a second combination of sectional magnetic steels;
FIG. 7 is a sectional type magnetic force line distribution simulation diagram of a permanent magnet;
FIG. 8 is a sectional magnetic steel torque graph;
wherein, 1, a first bolt; 2. a motor end cover; 3. a rotating shaft; 4. a bearing end cap; 5. a screw; 6. a bearing; 7. A limiting block; 8. a flat key groove; 9. a left side housing; 10. a stator disc; 11. a second bolt; 12. a right side housing; 13. A rotor disk; 14. a second unit section; 15. a first unit section; 16. a third unit section; 17. a winding; 18. a helical blade.
Detailed Description
Example 1:
as shown in fig. 1 to 8, a double rotor single stator disc motor includes a rotor including a rotor disc 13 and a stator including a stator disc 10. The two rotor disks are respectively positioned at the left side and the right side of the stator disk, and the rotor disk 13 is circular. The rotor disc and the stator disc are sleeved on the rotating shaft 3, the rotating shaft 3 is provided with a flat key keyway 8, and the rotor disc 13 is provided with a keyway with the same size. Rotor disks on the left and right sides of the stator disk are connected with the rotating shaft 3 through flat keys. The shaft hole of the stator disc 10 is supported on the rotating shaft 3 by a bearing, and the outer side of the stator disc is fixedly connected on a rotary shell formed by butting a left side shell 9 and a right side shell 12 through a second bolt 11.
The motor end covers 2 positioned on the left side and the right side of the motor are fixed on a motor rotating shaft 3 through bearings 6, the bearing end covers 4 are fixed on the motor end covers 2 of the motor through screws 5, the bearing end covers 4 and the limiting blocks 7 are used for axially positioning the bearings 6, and the rotary shell is connected with the motor end covers 2 through first bolts 1.
As shown in fig. 1, the rotor discs 13 on both sides of the stator of the dual-rotor single-stator disc motor are formed by laminating silicon steel sheets, and the stator disc 10 is of a coreless stator structure and is composed of a winding 17 and epoxy resin.
And permanent magnet steel slots are formed in the rotor disc by wire cutting or punching, and have the same external size as the permanent magnets.
As shown in fig. 5 and 6, each pole of permanent magnet is divided into a third unit portion 16, a first unit portion 15 and a second unit portion 14 from inside to outside along the radial distribution of the motor, the first unit portion 15 is magnetized along the axial direction of the disc motor, the magnetizing directions of the third unit portion 16 and the second unit portion 14 are perpendicular to the radial end face of the first unit portion 15, and the magnetizing direction points to the first unit portion 15, and the axial magnetic flux enhancement effect of the first unit portion 15 is achieved by using the magnetizing mode. The third unit part 16, the first unit part 15, and the second unit part 14 are bonded to each other by a high-strength structural adhesive, and the contact surfaces between the respective permanent magnets and the disc motor rotor disc 13 are also bonded to each other by a high-strength structural adhesive in order to prevent the permanent magnets from loosening in the permanent magnet magnetic steel grooves.
As shown in fig. 5 and 6, of two adjacent permanent magnets on a double-rotor single-stator disc motor: the third unit part 16 and the second unit part 14 have the same magnetizing direction, and the magnetizing directions of the first unit parts 15 of two adjacent permanent magnets are opposite.
As shown in fig. 5 and 6, the magnetic steel segment structure enhances the magnetic induction of the middle magnetic steel at the effective length part of the winding, which is beneficial to improving the motor torque.
As shown in fig. 7, parametric modeling simulation of the segmented magnetic steel is performed to obtain two motor torque curves, and comparison shows that the torque of the motor is obviously enhanced and the torque ripple is within a reasonable range.
In the radial direction of rotor dish, the flabellum district that is the gyration form and arranges along the circumferencial direction is all seted up to the both sides in magnetic steel groove, and flabellum district and magnetic steel groove distribution are concentric, and equal pitch distributes helical blade 18 in two flabellum districts, and helical blade 18 becomes the spiral twist angle of certain angle, can blow fan rear portion and wind around to fan the place ahead.
The number of the fan blades is designed to be odd according to the design principle of the fan blades, and the spiral angles of the spiral blades 18 in the two blade areas are opposite. When the rotor of the disk motor rotates, the helical blades 18 on the rotor disks 13 on the left and right sides of the stator disk 10 suck the air outside the rotor disks 13 into the rotor to form a cooling loop, so that the whole structure of the stator disk 10 is forced to cool.
Example 2:
three sections of magnetic steel of the permanent magnet are distributed in a shape like a Chinese character '1', each piece of magnetic steel is in a trapezoidal shape, the magnetic steel adopts a radial sectional structure and is composed of a third unit part 16, a first unit part 15 and a second unit part 14, wherein the third unit part 16 and the second unit part 14 are made of permanent magnet materials with relatively large intrinsic coercive force and relatively low residual magnetic flux density, and the first unit part 15 is made of permanent magnet materials with relatively small intrinsic coercive force and relatively high residual magnetic flux density. The permanent magnetic materials used in the third unit portion 16 and the second unit portion 14 are the same, and the third unit portion and the second unit portion have similar shapes and the same radial lengths. The permanent magnet materials adopted by the third unit part 16, the first unit part 15 and the second unit part 14 are neodymium iron boron permanent magnets, the first unit part 14 is magnetized along the axial direction of the disc motor, and the magnetizing directions of the third unit part 16 and the second unit part 14 are perpendicular to the radial end face of the first unit part 15.
As shown in fig. 6, arrows in the third unit portion 16, the first unit portion 15, and the second unit portion 14 indicate the magnetizing direction, and the length of the arrow indicates the magnitude of the residual magnetic flux density. This kind of disk motor reduces motor permanent magnet eddy current loss through the use of segmentation magnet steel to and the design of cooling structure on the rotor dish, make the temperature rise of this kind of motor low, can effectively guarantee the good use of motor winding insulating layer and permanent magnet, this structure motor can be used to a plurality of fields, if apply to a plurality of fields such as pure electric vehicles, hybrid vehicle, track traffic, intelligent manufacturing, marine industry.
The embodiments are merely illustrative of the principles and effects of the present invention, and do not limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed herein be covered by the appended claims.
Claims (10)
1. A rotor structure with sectional magnetic steel arrangement comprises a rotating shaft and a rotor disc sleeved on the rotating shaft, wherein the magnetic steel is arranged on the rotor disc in an embedded manner; the method is characterized in that: the magnetic steel comprises: the plurality of unit parts are spliced in the radial direction of the rotor disc to form a sectional structure;
the magnetic steel comprises a first unit part spliced between a second unit part and a third unit part, and the first unit part is magnetized along the axial direction of the motor to form a basic magnetic field generated along the axial direction of the motor;
the second unit part and the third unit part are magnetized along the radial direction of the motor to form an enhanced magnetic field which points to the direction of the basic magnetic field vertically;
the adjacent two magnetic steels on the rotor disc are as follows: the basic magnetic fields are arranged in a mode of opposite directions;
a fan blade area is arranged on the rotor disc and is positioned on the side of the magnetic steel in the radial direction of the rotor disc; and spiral blades distributed at equal intervals along the direction of the circular shaft are arranged in the fan blade area.
2. A rotor structure of a segmented magnetic steel arrangement according to claim 1, wherein: the magnetic steel is a permanent magnet;
the first unit part is magnetized along the axial direction of the motor to form the basic magnetic field;
the second unit part is magnetized along the radial direction of the motor to form the enhanced magnetic field;
the third unit part is magnetized along the radial direction of the motor to form the enhanced magnetic field.
3. A rotor structure of a segmented magnetic steel arrangement according to claim 2, wherein: the third unit section has the same length as the second unit section.
4. A rotor structure of a segmented magnetic steel arrangement according to claim 3, wherein: and the unit parts are in contact bonding by coating structural adhesive on the adjacent splicing surfaces.
5. A rotor structure of a segmented magnetic steel arrangement according to claim 1, wherein: the rotor disc comprises a first fan blade area and a second fan blade area; the first fan blade area and the second fan blade area are respectively located on two sides of the magnetic steel in the radial direction of the rotor disc.
6. A rotor structure of a segmented magnetic steel arrangement according to claim 5, wherein: the helical blades in the first blade area and the second blade area have the same/opposite helical directions.
7. A disc motor having a segmented magnetic steel arrangement rotor structure as claimed in claim 1, wherein: comprises a stator and a rotor on two sides of the stator; the rotor comprises the rotor disk; a rotating shaft is assembled in the shaft hole of the rotor disc in a key connection mode; the stator comprises a stator disc, and a winding is arranged on the stator disc; and the shaft hole of the stator disc is assembled with the rotating shaft through a bearing.
8. The disc motor according to claim 7, wherein: the stator disc is of a coreless stator structure.
9. The disc motor according to claim 7, wherein: the device comprises a shell, wherein the shell comprises end covers on two sides and a rotary shell between the end covers on the two sides; the stator is fixedly connected to the rotary shell through the stator disc to be assembled and connected; the rotating shaft is assembled with the shaft hole in the end cover through a bearing.
10. The disc motor according to claim 7, wherein: the permanent magnet material adopted by the magnetic steel comprises a neodymium iron boron permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022676511.9U CN214337760U (en) | 2020-11-18 | 2020-11-18 | Rotor structure and disk motor that sectional type magnet steel was arranged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022676511.9U CN214337760U (en) | 2020-11-18 | 2020-11-18 | Rotor structure and disk motor that sectional type magnet steel was arranged |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214337760U true CN214337760U (en) | 2021-10-01 |
Family
ID=77895704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022676511.9U Active CN214337760U (en) | 2020-11-18 | 2020-11-18 | Rotor structure and disk motor that sectional type magnet steel was arranged |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214337760U (en) |
-
2020
- 2020-11-18 CN CN202022676511.9U patent/CN214337760U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112383193B (en) | Oil-cooled axial flux motor with built-in integrated double-axial-flow fan | |
| CN110048575B (en) | Composite structure permanent magnet rotor suitable for high-speed permanent magnet synchronous motor | |
| CN104917318A (en) | Sheath of high-speed permanent magnet motor rotor | |
| US20210194303A1 (en) | Rotor of a Permanent-Magnet Dynamoelectric Rotary Machine | |
| CN112039238A (en) | Magnetic steel, motor rotor and permanent magnet motor | |
| CN101316058A (en) | Rotor protection sleeve of high speed permanent magnet motor | |
| CN104734422A (en) | Novel permanent magnet motor | |
| CN101626185A (en) | Permanent magnet synchronous motor | |
| CN112510951A (en) | Rotor structure and disk motor that sectional type magnet steel was arranged | |
| US20230361637A1 (en) | Electric machines with enhanced electromagnetic interaction | |
| CN112383191B (en) | Self-fan cold axial flux motor with external centrifugal fan | |
| CN214337759U (en) | Magnetic steel arrangement structure of disc type motor | |
| CN106877578B (en) | A kind of oil is cold, low consumption internal rotor permanent-magnetic motor | |
| CN201499071U (en) | Permanent-magnet synchronous motor | |
| CN107196474A (en) | A kind of five phase disc type amorphous magnetoes | |
| CN214337760U (en) | Rotor structure and disk motor that sectional type magnet steel was arranged | |
| CN113746232A (en) | Mixed cooling double-rotor single-stator disc type permanent magnet motor | |
| CN114421654B (en) | Transverse magnetic flux C-type embedded stator permanent magnet brushless wind driven generator | |
| CN111884364B (en) | Stator-rotor assembly and axial magnetic field motor | |
| CN112510950A (en) | Magnetic steel arrangement mode of disc type motor | |
| CN214958953U (en) | Rotor structure in efficient motor | |
| CN112910207A (en) | Double-stator single-rotor disc type motor | |
| CN111371218A (en) | Rotor and motor | |
| CN112863804A (en) | Magnetic group unit, magnetic array, motor, generator and running device | |
| CN213817372U (en) | Novel high-speed permanent magnet synchronous motor rotor structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |