CN112510950A - Magnetic steel arrangement mode of disc type motor - Google Patents
Magnetic steel arrangement mode of disc type motor Download PDFInfo
- Publication number
- CN112510950A CN112510950A CN202011294037.1A CN202011294037A CN112510950A CN 112510950 A CN112510950 A CN 112510950A CN 202011294037 A CN202011294037 A CN 202011294037A CN 112510950 A CN112510950 A CN 112510950A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- motor
- disc
- unit
- unit part
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
- H02K16/025—Machines with one stator and two or more rotors with rotors and moving stators connected in a cascade
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Abstract
The invention discloses a magnetic steel arrangement mode of a disk motor, which comprises the following steps: 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 section formed by dividing the rotor disk in the radial direction; 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 magnetic steel arrangement mode of 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 disk motor magnet steel arrangement mode for when solving disk permanent magnet motor rotor permanent magnet and adopting the installation of monoblock magnet steel, when the high-speed operation of motor, its inside can produce fairly big eddy current loss, thereby lead to the excessive high demagnetization phenomenon of appearing of permanent magnet temperature, the problem that the permanent magnet drops even appears.
A disk motor magnet steel arrangement mode that relates to in this scheme: the method comprises the following steps: 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: a segmented unit portion; the unit parts are spliced along the radial direction of the rotor disc, and the unit parts are in contact butt joint through a splicing surface.
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;
a second unit part closing magnetic lines along the radial direction of the motor to form a second magnetic field pointing to the generating direction of the first magnetic field vertically;
a third unit part closing magnetic lines along the radial direction of the motor to form a third magnetic field pointing to the generating direction of the first magnetic field vertically;
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.
Specifically, the splicing surface of the unit portion is a substantially axially extending plane, so that the splicing surface is in the same direction as the first magnetic field. Therefore, the second unit part is magnetized 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 is magnetized 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.
Preferably, the unit parts are in contact bonding by coating structural adhesive on the adjacent splicing surfaces.
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 stator comprises a stator disc, a winding is arranged on the stator disc, 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.
The invention has the advantages that:
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.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a front view of a rotor disk;
FIG. 2 is a sectional magnetic steel positive pole direction combination diagram;
FIG. 3 is a sectional magnetic steel reverse direction combination diagram;
FIG. 4 is a graph showing the comparison of magnetic effects of four types of sectional magnetic steel;
FIG. 5 is a front view of the spindle;
FIG. 6 is a sectional type magnetic force line distribution simulation diagram of a permanent magnet;
FIG. 7 is a sectional magnetic steel torque graph;
fig. 8 is a cross-sectional view of a dual rotor single stator disc motor;
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. and (4) winding.
Detailed Description
Example 1:
as shown in fig. 4, the magnetization of the segmented magnetic steel can be based on four combinations (the four combinations in fig. 4 are all the magnetization directions on the longitudinal section of the magnetic steel).
and a, in combination, the three unit parts are magnetized upwards, the magnetic field intensity is uniform but not concentrated, and the amplification effect is not ideal.
And b, combining, wherein the middle unit part is magnetized upwards, the magnetizations of the two side unit parts are vertically directed to the magnetic field direction of the middle unit part, the magnetic force lines are dense, the magnetic field amplification is concentrated, and the amplification effect is outstanding.
And c and d, the magnetizing directions of the two side unit parts and the middle unit part are opposite to each other, the amplification of a magnetic field is not generated, and magnetic lines of force are mutually offset.
Therefore, as can be seen from the comparison of the curves of the four combined magnetic field amplification curves, the combined magnetic field amplification effect of b is the best, that is, the magnetization direction adopted in the scheme of the invention can produce a more prominent magnetic field enhancement effect.
Example 2:
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. 2 and 3, 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, two adjacent permanent magnets on the 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. 6, the magnetic steel segment structure enhances the magnetic induction intensity of the middle magnetic steel opposite to the effective length of the winding, which is beneficial to improving the motor torque, and the actually measured torque is improved by 5% -18%.
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.
Example 3:
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 magnet material used in the third unit portion 16 and the permanent magnet material used in the second unit portion 14 are the same medium permanent magnet material, and the third unit portion and the second unit portion have similar shapes and the same radial length. 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 disk motor magnet steel arrangement mode comprises: the rotor disc is formed by laminating silicon steel sheets, a magnetic steel groove is distributed on the rotor disc, and magnetic steel is embedded in the magnetic steel groove; the method is characterized in that: the magnetic steel comprises: a segmented unit portion; splicing a plurality of unit parts 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;
a second unit part closing magnetic lines along the radial direction of the motor to form a second magnetic field pointing to the generating direction of the first magnetic field vertically;
a third unit part closing magnetic lines along the radial direction of the motor to form a third magnetic field pointing to the generating direction of the first magnetic field vertically;
two adjacent magnetic steels on the rotor disc: 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.
2. A disc motor magnet 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 first magnetic field;
the second unit part is magnetized along the radial direction of the motor to form the second magnetic field;
the third unit part is magnetized along the radial direction of the motor to form the third magnetic field.
3. A disc motor magnet steel arrangement according to claim 2, wherein: the magnetic steel is as follows: the second unit part, the first unit part and the third unit part are sequentially spliced.
4. A disc motor magnet steel arrangement according to claim 3, wherein: the third unit section has the same length as the second unit section.
5. A disc motor magnetic steel arrangement according to claim 4, characterized in that: and the unit parts are in contact bonding by coating structural adhesive on the adjacent splicing surfaces.
6. A disc motor magnetic steel arrangement mode according to claim 1 or 5, 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.
7. A disc motor magnetic steel arrangement according to claim 6, characterized in that: the stator disc is of a coreless stator structure.
8. A disc motor magnetic steel arrangement according to claim 6, characterized in that: the shell comprises end covers on two sides and a rotary shell between the end covers on the two sides.
9. A disc motor magnetic steel arrangement according to claim 8, wherein: 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. A disc motor magnet steel arrangement according to claim 2, wherein: the permanent magnet material adopted by the magnetic steel comprises but is not limited to a neodymium iron boron permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294037.1A CN112510950A (en) | 2020-11-18 | 2020-11-18 | Magnetic steel arrangement mode of disc type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294037.1A CN112510950A (en) | 2020-11-18 | 2020-11-18 | Magnetic steel arrangement mode of disc type motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112510950A true CN112510950A (en) | 2021-03-16 |
Family
ID=74956837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011294037.1A Pending CN112510950A (en) | 2020-11-18 | 2020-11-18 | Magnetic steel arrangement mode of disc type motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112510950A (en) |
-
2020
- 2020-11-18 CN CN202011294037.1A patent/CN112510950A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109274240B (en) | Composite amorphous alloy axial flux motor | |
| US8546990B2 (en) | Permanent magnet synchronous rotating electric machine and rotor core | |
| CN109088494B (en) | Built-in hybrid permanent magnet memory motor with parallel local magnetic circuits | |
| EP1643618B1 (en) | Rotor for rotary electric machine | |
| CN110798039A (en) | double-V-shaped motor rotor applied to permanent magnet synchronous motor of electric automobile | |
| JP4619585B2 (en) | Reluctance type rotating electrical machine | |
| GB2567316A (en) | Motor | |
| CN110048575B (en) | Composite structure permanent magnet rotor suitable for high-speed permanent magnet synchronous motor | |
| CN113014009B (en) | Permanent magnet series-parallel type variable magnetic circuit adjustable magnetic flux motor | |
| CN103490534B (en) | A kind of stator permanent magnetic type vernier motor structure reducing detent force | |
| CN109378916A (en) | A kind of auxiliary permanent magnet alternating pole spoke type rotor structure for permanent magnet motor | |
| CN214337759U (en) | Magnetic steel arrangement structure of disc type motor | |
| CN111786481A (en) | Multilayer rotor magnetic steel structure of permanent magnet motor for high-power-density new energy automobile | |
| CN105515242A (en) | Embedded disk-type motor rotor | |
| CN107196474A (en) | A kind of five phase disc type amorphous magnetoes | |
| CN112510951A (en) | Rotor structure and disk motor that sectional type magnet steel was arranged | |
| CN110138165B (en) | Composite magnetic circuit stator split type axial permanent magnet motor | |
| CN112510950A (en) | Magnetic steel arrangement mode of disc type motor | |
| CN114094738B (en) | Self-starting permanent magnet auxiliary synchronous reluctance motor rotor and motor | |
| CN214337760U (en) | Rotor structure and disk motor that sectional type magnet steel was arranged | |
| CN201409066Y (en) | High-fault tolerance enhanced magnetic field type flux motor with PM switch | |
| CN210007497U (en) | non-rare earth motor rotor structure for new energy automobile | |
| CN109586439B (en) | Composite magnet multi-layer sheath high-speed permanent magnet motor rotor | |
| CN110808673A (en) | Novel double-stator Halbach alternating pole permanent magnet vernier motor | |
| CN111371218A (en) | Rotor and motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |