CN112491175A - M type permanent magnet in-wheel motor magnetic circuit structure - Google Patents
M type permanent magnet in-wheel motor magnetic circuit structure Download PDFInfo
- Publication number
- CN112491175A CN112491175A CN202011432256.1A CN202011432256A CN112491175A CN 112491175 A CN112491175 A CN 112491175A CN 202011432256 A CN202011432256 A CN 202011432256A CN 112491175 A CN112491175 A CN 112491175A
- Authority
- CN
- China
- Prior art keywords
- rotor
- permanent magnet
- motor
- magnetic circuit
- wheel motor
- 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
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- 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
-
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to a structure of an M-shaped hub motor, which belongs to the field of motor structure design. The M-shaped permanent magnet structure can effectively improve the performance of the hub motor in the aspects of cogging torque and average electromagnetic torque, and the magnetizing direction of the arrangement of the M-shaped permanent magnets enables magnetic density waveforms to have good distribution characteristics, sine-like curves between wave crests and wave troughs enable the content of sine fundamental waves to be remarkably improved, and air gap magnetic density approaches to sine waveforms gradually. The concave auxiliary groove of the rotor can reduce torque pulsation, is beneficial to improving the working performance of the motor, and the vent of the rotor has good exhaust performance, reduces the temperature of the generator and improves the operating efficiency of the generator.
Description
Technical Field
The invention relates to the technical field of motor structures, in particular to a magnetic circuit structure of an M-shaped permanent magnet hub motor.
Background
The hub motor technology is also called as wheel built-in motor technology, and is a hub device technology which integrates a motor, a transmission system and a brake system. In view of the characteristics and development trend of various driving technologies, the hub motor technology is the final driving form of the electric automobile. The rotor structure of the permanent magnet hub motor is divided into an inner rotor and an outer rotor, the two structures are applied to the current electric automobile, but with the occurrence of a compact planetary gear speed change mechanism, a high-speed inner rotor type driving system has higher competitiveness in terms of power density than a low-speed outer rotor type driving system, the performance of the hub motor can be effectively improved in terms of cogging torque, average electromagnetic torque and the like by the improved M-type permanent magnet structure, the concave auxiliary groove can effectively reduce pulsating torque, improve the waveform of air gap magnetic density, weaken counter electromotive force harmonic waves, reduce vibration noise of the permanent magnet synchronous motor, and have important practical significance for prolonging the service life of the motor system and improving the control precision.
Disclosure of Invention
In order to solve the technical problems, the invention provides a magnetic circuit of an M-shaped permanent magnet hub motor and a concave auxiliary groove structure, so that the cogging torque of the permanent magnet hub motor is reduced, the pulsating torque is effectively reduced, the average electromagnetic torque of the hub motor during operation is improved, the vibration noise of the permanent magnet synchronous motor is reduced, and the torque output performance of the motor is further improved.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a magnetic circuit and a concave auxiliary slot structure of an M-shaped permanent magnet hub motor. The rotor is embedded in the stator, the rotor and the stator are coaxial, the rotating shaft is arranged at the center of the rotor, the permanent magnets are uniformly arranged on the rotor in an M shape, and the magnetism isolating material is placed at the end part of the M-shaped permanent magnet.
Optionally, a plurality of vent holes are formed through the rotor.
Optionally, a plurality of auxiliary grooves are provided on the rotor.
Compared with the prior art, the invention has the following technical effects: the main structure of the magnetic circuit structure of the M-type permanent magnet hub motor comprises a stator, a rotor, a rotating shaft, a permanent magnet, a magnetic isolation material, a rotor auxiliary groove, a winding groove and a vent hole, the permanent magnet hub motor has better operating characteristics, the rotor adopts an embedded radial rotor, the cogging torque is small, the rotating shaft does not need to take a magnetic isolation measure, the concave auxiliary groove can effectively reduce the pulsation torque, improve the waveform of the air gap magnetic density, weaken the counter electromotive force harmonic wave, reduce the vibration noise of the permanent magnet hub motor and meet the requirements of high power density and high torque density; the rotor vent has good exhaust performance, can reduce the motor operation noise, reduces the iron core loss, strengthens the motor radiating effect, reduces the temperature of the motor, and improves the operation efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below. It is to be understood that the drawings described below are merely exemplary of some of the embodiments of the invention. It is also possible for a person skilled in the art to obtain them from these figures without the inventive effort of other efforts.
Fig. 1 is a schematic structural diagram of a magnetic circuit structure of an M-type permanent magnet hub motor of the present invention.
Fig. 2 is a schematic view of the magnetization direction of the M-type permanent magnet hub motor of the present invention.
Description of reference numerals: 1. a stator; 2. a rotor; 3. a rotating shaft; 4. a permanent magnet; 5. a winding slot; 6. an auxiliary groove; 7. a magnetic barrier material; 8. a vent hole.
Detailed Description
The invention explicitly and completely describes the technical scheme in the embodiment. The described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The implementation of the embodiments of the invention also relates to other embodiments that can be obtained by a person skilled in the art without inventive work.
The first embodiment is as follows: as shown in fig. 1, the present embodiment provides a magnetic circuit structure of an M-type permanent magnet hub motor, including a stator 1, a rotor 2, a rotating shaft 3, a permanent magnet 4, winding slots 5, auxiliary slots 6, a magnetic isolation material 7, and a ventilation hole 8; the rotor 2 is embedded in the stator 1, the rotor 2 is coaxial with the stator 1, the rotating shaft 3 is arranged at the center of the rotor 2, and the permanent magnets 4 are uniformly arranged on the rotor 2 and are M-shaped.
In this embodiment, the magnetic shielding material 7 is disposed at the end of the M-shaped permanent magnet.
The permanent magnet hub motor in the embodiment has better operation characteristics, the rotor 2 adopts an embedded radial rotor, the cogging torque is small, and a magnetic isolation measure is not required to be taken on the rotating shaft 3; the rotor vent 8 has good exhaust performance, can reduce the operation noise of the motor, reduce the loss of an iron core, strengthen the heat dissipation effect of the motor, reduce the temperature of the generator and improve the operation efficiency of the generator.
The rotor 2 adopts an M-shaped permanent magnet structure, so that the air gap flux density of the motor can be improved, and the torque output performance of the motor can be improved. The improved M-shaped permanent magnet structure in the embodiment can effectively improve the performance of the hub motor in the aspects of cogging torque, average electromagnetic torque and the like, the concave auxiliary groove can effectively reduce pulsating torque, improve the waveform of air gap flux density, weaken counter electromotive force harmonic waves, reduce the vibration noise of the permanent magnet synchronous motor, and increase the torque output and weak magnetic speed regulation capacity of the motor in the constant power speed regulation stage, thereby improving the power output smoothness and speed regulation capacity of the motor, and meeting the characteristics of high power density and high torque density of the permanent magnet hub motor.
The permanent magnet magnetizing mode shown in fig. 2 enables the motor air gap flux density sine distribution degree to be high, the harmonic content to be low, and the magnetic field performance of the inner permanent magnet rotor and the outer permanent magnet rotor to the rotating motor to be further improved.
In the present invention, the principles and embodiments of the present invention are described by specific examples, and the above description of the embodiments is only for assisting understanding of the basic method and idea of the present invention; also, the manner in which the concepts of the present invention are applied and the scope of application have changed to those of ordinary skill in the art. In view of the above, the contents of the specification should not be construed as limiting the present invention.
Claims (3)
1. The utility model provides a novel permanent magnetism in-wheel motor structure, its characterized in that, includes the stator, the rotor, the pivot, M type permanent magnet and separate magnetic material, the winding groove, the concave type auxiliary tank of rotor, the rotor ventilation hole, the rotor embedded in the stator, the rotor with the stator is coaxial, the pivot is established in rotor center department, the permanent magnet is in align to grid is the M type on the rotor, separate magnetic material place in the tip of M type permanent magnet.
2. An M-type permanent magnet in-wheel motor magnetic circuit structure as claimed in claim 1, wherein the rotor is uniformly provided with 12 ventilation holes along the circumferential direction.
3. An M-type permanent magnet in-wheel motor magnetic circuit structure as claimed in claim 1, wherein the concave auxiliary slots are uniformly distributed along the circumferential direction of the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432256.1A CN112491175A (en) | 2020-12-10 | 2020-12-10 | M type permanent magnet in-wheel motor magnetic circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432256.1A CN112491175A (en) | 2020-12-10 | 2020-12-10 | M type permanent magnet in-wheel motor magnetic circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112491175A true CN112491175A (en) | 2021-03-12 |
Family
ID=74941080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011432256.1A Pending CN112491175A (en) | 2020-12-10 | 2020-12-10 | M type permanent magnet in-wheel motor magnetic circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112491175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178964A (en) * | 2021-06-03 | 2021-07-27 | 哈尔滨理工大学 | Novel switched reluctance motor with stator and rotor tooth-shaped structure |
-
2020
- 2020-12-10 CN CN202011432256.1A patent/CN112491175A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178964A (en) * | 2021-06-03 | 2021-07-27 | 哈尔滨理工大学 | Novel switched reluctance motor with stator and rotor tooth-shaped structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110798039A (en) | double-V-shaped motor rotor applied to permanent magnet synchronous motor of electric automobile | |
| CN204334259U (en) | A kind of electric vehicle rotor segment is oblique pole formula double plate magneto oppositely | |
| CN101651395A (en) | Sine wave current self-starting three-phase rare earth permanent-magnetism synchronous motor | |
| CN108777538A (en) | Two-way flux coupled formula magnetic field modulation direct driving motor for electric vehicle | |
| CN109672312A (en) | Permanent magnet synchronous motor | |
| CN115632534A (en) | Direct-drive type bilateral permanent magnet excitation type magnetic field modulation motor | |
| CN112821618B (en) | Segmented eccentric integrated magnetic pole structure of hub motor | |
| CN112491175A (en) | M type permanent magnet in-wheel motor magnetic circuit structure | |
| CN114640231B (en) | Coreless high-power radial alternating current permanent magnet synchronous motor | |
| CN213661295U (en) | M type permanent magnet in-wheel motor magnetic circuit structure | |
| CN201478968U (en) | Sine current self-starting three-phase rare-earth permanent-magnet synchronous motor | |
| CN114421654B (en) | Transverse magnetic flux C-type embedded stator permanent magnet brushless wind driven generator | |
| CN203522484U (en) | Permanent-magnet wheel hub motor structure | |
| CN115714485A (en) | Separated type alternating pole permanent magnet motor based on double magnetic field modulation effect | |
| CN115940455A (en) | Novel built-in high-speed permanent magnet motor rotor structure | |
| CN211859753U (en) | High-efficiency permanent magnet motor | |
| CN114844262A (en) | Half magnetic bridge PMSM rotor, motor and vehicle | |
| CN204442130U (en) | A kind of permagnetic synchronous motor | |
| CN207117325U (en) | The groove ceiling-fan motor of 60 pole 54 | |
| CN208337377U (en) | A kind of high-intensitive permanent magnet synchronous motor remanufactured | |
| CN111969743A (en) | Built-in V-shaped segmented high-speed permanent magnet synchronous motor rotor punching sheet, rotor and motor | |
| CN112564335A (en) | Multi-magnetic-conduction monopole stator permanent magnet motor | |
| CN112910134A (en) | Novel structure of combined type permanent magnet motor | |
| CN220915017U (en) | Punching sheet structure of low electromagnetic noise permanent magnet motor rotor | |
| Zhang et al. | Windage loss and torque ripple reduction in stator-permanent magnet flux-switching machines |
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 |